[1] | 1 | // MergingHooks.cc is a part of the PYTHIA event generator. |
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| 2 | // Copyright (C) 2012 Torbjorn Sjostrand. |
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| 3 | // PYTHIA is licenced under the GNU GPL version 2, see COPYING for details. |
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| 4 | // Please respect the MCnet Guidelines, see GUIDELINES for details. |
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| 5 | |
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| 6 | // This file is written by Stefan Prestel. |
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| 7 | // Function definitions (not found in the header) for the HardProcess and |
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| 8 | // MergingHooks classes. |
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| 9 | |
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| 10 | #include "MergingHooks.h" |
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| 11 | |
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| 12 | namespace Pythia8 { |
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| 13 | |
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| 14 | //========================================================================== |
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| 15 | |
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| 16 | // The HardProcess class. |
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| 17 | |
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| 18 | //-------------------------------------------------------------------------- |
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| 19 | |
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| 20 | // Declaration of hard process class |
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| 21 | // This class holds information on the desired hard 2->2 process to be merged |
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| 22 | // This class is a container class for History class use. |
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| 23 | |
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| 24 | // Initialisation on the process string |
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| 25 | |
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| 26 | void HardProcess::initOnProcess( string process, ParticleData* particleData) { |
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| 27 | state.init("(hard process)", particleData); |
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| 28 | translateProcessString(process); |
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| 29 | } |
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| 30 | |
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| 31 | //-------------------------------------------------------------------------- |
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| 32 | |
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| 33 | // Initialisation on the path to LHE file |
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| 34 | |
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| 35 | void HardProcess::initOnLHEF( string LHEfile, ParticleData* particleData) { |
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| 36 | state.init("(hard process)", particleData); |
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| 37 | translateLHEFString(LHEfile); |
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| 38 | } |
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| 39 | |
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| 40 | //-------------------------------------------------------------------------- |
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| 41 | |
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| 42 | // Function to access the LHE file and read relevant information. |
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| 43 | // The merging scale will be read from the +1 jet sample, called |
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| 44 | // LHEpath_1.lhe |
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| 45 | // while the hard process will be read from |
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| 46 | // LHEpath_0.lhe |
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| 47 | // Currently, only read from MadEvent- or Sherpa-generated LHE files |
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| 48 | // is automatic, else the user is asked to supply the necessary |
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| 49 | // information. |
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| 50 | |
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| 51 | void HardProcess::translateLHEFString( string LHEpath){ |
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| 52 | |
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| 53 | // Open path to LHEF and extract merging scale |
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| 54 | ifstream infile; |
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| 55 | infile.open( (char*)( LHEpath +"_0.lhe").c_str()); |
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| 56 | |
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| 57 | // Check with ME generator has been used |
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| 58 | int iLine =0; |
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| 59 | int nLinesMax = 200; |
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| 60 | string lineGenerator; |
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| 61 | while( iLine < nLinesMax |
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| 62 | && lineGenerator.find("SHERPA", 0) == string::npos |
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| 63 | && lineGenerator.find("POWHEG-BOX", 0) == string::npos |
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| 64 | && lineGenerator.find("Pythia8", 0) == string::npos |
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| 65 | && lineGenerator.find("MadGraph", 0) == string::npos){ |
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| 66 | iLine++; |
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| 67 | lineGenerator = " "; |
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| 68 | getline(infile,lineGenerator); |
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| 69 | } |
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| 70 | infile.close(); |
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| 71 | |
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| 72 | vector <int> incom; |
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| 73 | vector <int> inter; |
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| 74 | vector <int> outgo; |
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| 75 | // Particle identifiers, ordered in such a way that e.g. the "u" |
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| 76 | // in a mu is not mistaken for an u quark |
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| 77 | int inParticleNumbers[] = { |
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| 78 | // Leptons |
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| 79 | -11,11,-12,12,-13,13,-14,14,-15,15,-16,16, |
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| 80 | // Jet container |
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| 81 | 2212,2212,0,0,0,0, |
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| 82 | // Quarks |
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| 83 | -1,1,-2,2,-3,3,-4,4,-5,5,-6,6}; |
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| 84 | |
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| 85 | string inParticleNamesSH[] = { |
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| 86 | // Leptons |
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| 87 | "-11","11","-12","12","-13","13","-14","14","-15","15","-16","16", |
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| 88 | // Jet container |
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| 89 | "-93","93","-90","90","-91","91", |
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| 90 | // Quarks |
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| 91 | "-1","1","-2","2","-3","3","-4","4","-5","5","-6","6"}; |
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| 92 | string inParticleNamesMG[] = { |
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| 93 | // Leptons |
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| 94 | "e+","e-","ve~","ve","mu+","mu-","vm~","vm","ta+","ta-","vt~","vt", |
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| 95 | // Jet container |
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| 96 | "p~","p","l+","l-","vl~","vl", |
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| 97 | // Quarks |
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| 98 | "d~","d","u~","u","s~","s","c~","c","b~","b","t~","t"}; |
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| 99 | |
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| 100 | // Declare intermediate particle identifiers |
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| 101 | int interParticleNumbers[] = { |
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| 102 | // Electroweak gauge bosons |
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| 103 | 22,23,-24,24,25,2400, |
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| 104 | // Top quarks |
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| 105 | -6,6, |
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| 106 | // Dummy index as back-up |
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| 107 | 0, |
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| 108 | // All squarks |
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| 109 | -1000001,1000001,-1000002,1000002,-1000003,1000003,-1000004,1000004, |
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| 110 | -1000005,1000005,-1000006,1000006,-2000001,2000001,-2000002,2000002, |
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| 111 | -2000003,2000003,-2000004,2000004,-2000005,2000005,-2000006,2000006}; |
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| 112 | // Declare names of intermediate particles |
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| 113 | string interParticleNamesMG[] = { |
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| 114 | // Electroweak gauge bosons |
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| 115 | "a","z","w-","w+","h","W", |
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| 116 | // Top quarks |
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| 117 | "t~","t", |
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| 118 | // Dummy index as back-up |
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| 119 | "xx", |
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| 120 | // All squarks |
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| 121 | "dl~","dl","ul~","ul","sl~","sl","cl~","cl","b1~","b1","t1~","t1", |
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| 122 | "dr~","dr","ur~","ur","sr~","sr","cr~","cr","b2~","b2","t2~","t2"}; |
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| 123 | |
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| 124 | // Declare final state particle identifiers |
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| 125 | int outParticleNumbers[] = { |
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| 126 | // Leptons |
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| 127 | -11,11,-12,12,-13,13,-14,14,-15,15,-16,16, |
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| 128 | // Jet container and lepton containers |
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| 129 | 2212,2212,0,0,0,0,1200,1100,5000, |
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| 130 | // Quarks |
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| 131 | -1,1,-2,2,-3,3,-4,4,-5,5,-6,6, |
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| 132 | // SM uncoloured bosons |
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| 133 | 22,23,-24,24,25,2400, |
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| 134 | // Neutralino in SUSY |
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| 135 | 1000022, |
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| 136 | // All squarks |
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| 137 | -1000001,1000001,-1000002,1000002,-1000003,1000003,-1000004,1000004, |
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| 138 | -1000005,1000005,-1000006,1000006,-2000001,2000001,-2000002,2000002, |
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| 139 | -2000003,2000003,-2000004,2000004,-2000005,2000005,-2000006,2000006}; |
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| 140 | // Declare names of final state particles |
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| 141 | string outParticleNamesMG[] = { |
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| 142 | // Leptons |
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| 143 | "e+","e-","ve~","ve","mu+","mu-","vm~","vm","ta+","ta-","vt~","vt", |
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| 144 | // Jet container and lepton containers |
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| 145 | "j~","j","l+","l-","vl~","vl","NEUTRINOS","LEPTONS","BQUARKS", |
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| 146 | // Quarks |
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| 147 | "d~","d","u~","u","s~","s","c~","c","b~","b","t~","t", |
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| 148 | // SM uncoloured bosons |
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| 149 | "a","z","w-","w+","h","W", |
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| 150 | // Neutralino in SUSY |
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| 151 | "n1", |
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| 152 | // All squarks |
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| 153 | "dl~","dl","ul~","ul","sl~","sl","cl~","cl","b1~","b1","t1~","t1", |
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| 154 | "dr~","dr","ur~","ur","sr~","sr","cr~","cr","b2~","b2","t2~","t2"}; |
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| 155 | |
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| 156 | string outParticleNamesSH[] = { |
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| 157 | // Leptons |
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| 158 | "-11","11","-12","12","-13","13","-14","14","-15","15","-16","16", |
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| 159 | // Jet container and lepton containers |
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| 160 | "-93","93","-90","90","-91","91","0","0","0", |
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| 161 | // Quarks |
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| 162 | "-1","1","-2","2","-3","3","-4","4","-5","5","-6","6", |
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| 163 | // SM uncoloured bosons |
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| 164 | "22","23","-24","24","25","0", |
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| 165 | // Neutralino in SUSY |
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| 166 | "1000022", |
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| 167 | // All squarks |
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| 168 | "-1000001","1000001","-1000002","1000002","-1000003","1000003", |
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| 169 | "-1000004","1000004", |
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| 170 | "-1000005","1000005","-1000006","1000006","-2000001","2000001", |
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| 171 | "-2000002","2000002", |
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| 172 | "-2000003","2000003","-2000004","2000004","-2000005","2000005", |
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| 173 | "-2000006","2000006"}; |
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| 174 | |
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| 175 | // Declare size of particle name arrays |
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| 176 | int nIn = 30; |
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| 177 | int nInt = 33; |
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| 178 | int nOut = 64; |
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| 179 | |
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| 180 | // Save type of the generator, in order to be able to extract |
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| 181 | // the tms definition |
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| 182 | meGenType = (lineGenerator.find("MadGraph", 0) != string::npos) ? -1 |
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| 183 | : (lineGenerator.find("SHERPA", 0) != string::npos) ? -2 |
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| 184 | : (lineGenerator.find("POWHEG-BOX", 0) != string::npos) ? -3 |
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| 185 | : (lineGenerator.find("Pythia8", 0) != string::npos) ? -4 |
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| 186 | : 0; |
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| 187 | |
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| 188 | if (meGenType == -2){ |
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| 189 | // Now read merging scale |
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| 190 | // Open path to LHEF and extract merging scale |
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| 191 | infile.open( (char*)( LHEpath +"_1.lhe").c_str()); |
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| 192 | string lineTMS; |
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| 193 | while(lineTMS.find("NJetFinder ", 0) == string::npos){ |
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| 194 | lineTMS = " "; |
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| 195 | getline(infile,lineTMS); |
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| 196 | } |
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| 197 | infile.close(); |
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| 198 | lineTMS = lineTMS.substr(0,lineTMS.find(" 0.0 ",0)); |
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| 199 | lineTMS = lineTMS.substr(lineTMS.find(" ", 0)+3,lineTMS.size()); |
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| 200 | // Remove whitespaces |
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| 201 | while(lineTMS.find(" ", 0) != string::npos) |
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| 202 | lineTMS.erase(lineTMS.begin()+lineTMS.find(" ",0)); |
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| 203 | // Replace d with e |
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| 204 | if ( lineTMS.find("d", 0) != string::npos) |
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| 205 | lineTMS.replace(lineTMS.find("d", 0),1,1,'e'); |
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| 206 | tms = atof((char*)lineTMS.c_str()); |
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| 207 | |
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| 208 | // Now read hard process |
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| 209 | // Open path to LHEF and extract hard process |
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| 210 | infile.open( (char*)( LHEpath +"_0.lhe").c_str()); |
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| 211 | string line; |
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| 212 | while(line.find("Process", 0) == string::npos){ |
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| 213 | line = " "; |
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| 214 | getline(infile,line); |
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| 215 | } |
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| 216 | infile.close(); |
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| 217 | line = line.substr(line.find(" ",0),line.size()); |
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| 218 | |
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| 219 | // Cut string into incoming and outgoing pieces |
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| 220 | vector <string> pieces; |
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| 221 | pieces.push_back( line.substr(0,line.find("->", 0)) ); |
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| 222 | // Do not count additional final jets |
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| 223 | int end = (line.find("{", 0) != string::npos) ? line.find("{", 0)-2 |
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| 224 | : line.size(); |
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| 225 | pieces.push_back( line.substr(line.find("->", 0)+2, end) ); |
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| 226 | |
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| 227 | // Get incoming particles |
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| 228 | for(int i=0; i < nIn; ++i) { |
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| 229 | for(int n = pieces[0].find(inParticleNamesSH[i], 0); |
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| 230 | n != int(string::npos); |
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| 231 | n = pieces[0].find(inParticleNamesSH[i], n)) { |
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| 232 | incom.push_back(inParticleNumbers[i]); |
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| 233 | pieces[0].erase(pieces[0].begin()+n, |
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| 234 | pieces[0].begin()+n+inParticleNamesSH[i].size()); |
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| 235 | n=0; |
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| 236 | } |
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| 237 | } |
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| 238 | // Get intermediate particles |
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| 239 | // If intermediates are still empty, fill intermediate with default value |
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| 240 | inter.push_back(0); |
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| 241 | // Get final particles |
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| 242 | for(int i=0; i < nOut; ++i) { |
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| 243 | for(int n = pieces[1].find(outParticleNamesSH[i], 0); |
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| 244 | n != int(string::npos); |
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| 245 | n = pieces[1].find(outParticleNamesSH[i], n)) { |
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| 246 | outgo.push_back(outParticleNumbers[i]); |
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| 247 | pieces[1].erase(pieces[1].begin()+n, |
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| 248 | pieces[1].begin()+n+outParticleNamesSH[i].size()); |
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| 249 | n=0; |
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| 250 | } |
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| 251 | } |
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| 252 | |
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| 253 | } else if (meGenType == -1 || meGenType == -3 || meGenType == -4){ |
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| 254 | |
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| 255 | // Now read merging scale |
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| 256 | string lineTMS; |
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| 257 | |
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| 258 | if (meGenType == -1) { |
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| 259 | // Open path to LHEF and extract merging scale |
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| 260 | infile.open( (char*)( LHEpath +"_1.lhe").c_str()); |
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| 261 | while(lineTMS.find("ktdurham", 0) == string::npos){ |
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| 262 | lineTMS = " "; |
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| 263 | getline(infile,lineTMS); |
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| 264 | } |
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| 265 | lineTMS = lineTMS.substr(0,lineTMS.find("=",0)); |
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| 266 | infile.close(); |
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| 267 | } else { |
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| 268 | lineTMS = "30."; |
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| 269 | } |
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| 270 | |
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| 271 | // Remove whitespaces |
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| 272 | while(lineTMS.find(" ", 0) != string::npos) |
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| 273 | lineTMS.erase(lineTMS.begin()+lineTMS.find(" ",0)); |
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| 274 | // Replace d with e |
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| 275 | if ( lineTMS.find("d", 0) != string::npos) |
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| 276 | lineTMS.replace(lineTMS.find("d", 0),1,1,'e'); |
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| 277 | tms = atof((char*)lineTMS.c_str()); |
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| 278 | |
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| 279 | // Now read hard process |
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| 280 | // Open path to LHEF and extract hard process |
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| 281 | infile.open( (char*)( LHEpath +"_0.lhe").c_str()); |
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| 282 | string line; |
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| 283 | while(line.find("@1", 0) == string::npos){ |
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| 284 | line = " "; |
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| 285 | getline(infile,line); |
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| 286 | } |
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| 287 | infile.close(); |
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| 288 | line = line.substr(0,line.find("@",0)); |
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| 289 | |
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| 290 | // Count number of resonances |
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| 291 | int appearances = 0; |
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| 292 | for(int n = line.find("(", 0); n != int(string::npos); |
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| 293 | n = line.find("(", n)) { |
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| 294 | appearances++; |
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| 295 | n++; |
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| 296 | } |
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| 297 | |
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| 298 | // Cut string in incoming, resonance+decay and outgoing pieces |
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| 299 | vector <string> pieces; |
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| 300 | for(int i =0; i < appearances;++i) { |
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| 301 | int n = line.find("(", 0); |
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| 302 | pieces.push_back(line.substr(0,n)); |
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| 303 | line = line.substr(n+1,line.size()); |
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| 304 | } |
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| 305 | // Cut last resonance from rest |
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| 306 | if (appearances > 0) { |
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| 307 | pieces.push_back( line.substr(0,line.find(")",0)) ); |
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| 308 | pieces.push_back( line.substr(line.find(")",0)+1,line.size()) ); |
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| 309 | } |
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| 310 | |
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| 311 | // If the string was not cut into pieces, i.e. no resonance was |
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| 312 | // required, cut string using '>' as delimiter |
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| 313 | if (pieces.empty() ){ |
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| 314 | appearances = 0; |
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| 315 | for(int n = line.find(">", 0); n != int(string::npos); |
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| 316 | n = line.find(">", n)) { |
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| 317 | appearances++; |
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| 318 | n++; |
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| 319 | } |
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| 320 | |
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| 321 | // Cut string in incoming and outgoing pieces |
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| 322 | for(int i =0; i < appearances;++i) { |
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| 323 | int n = line.find(">", 0); |
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| 324 | pieces.push_back(line.substr(0,n)); |
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| 325 | line = line.substr(n+1,line.size()); |
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| 326 | } |
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| 327 | |
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| 328 | if (appearances == 1) pieces.push_back(line); |
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| 329 | if (appearances > 1) { |
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| 330 | pieces.push_back( line.substr(0,line.find(">",0)) ); |
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| 331 | pieces.push_back( line.substr(line.find(">",0)+1,line.size()) ); |
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| 332 | } |
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| 333 | } |
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| 334 | |
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| 335 | // Get incoming particles |
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| 336 | for(int i=0; i < nIn; ++i) { |
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| 337 | for(int n = pieces[0].find(inParticleNamesMG[i], 0); |
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| 338 | n != int(string::npos); |
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| 339 | n = pieces[0].find(inParticleNamesMG[i], n)) { |
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| 340 | incom.push_back(inParticleNumbers[i]); |
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| 341 | pieces[0].erase(pieces[0].begin()+n, |
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| 342 | pieces[0].begin()+n+inParticleNamesMG[i].size()); |
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| 343 | n=0; |
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| 344 | } |
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| 345 | } |
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| 346 | |
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| 347 | // Check intermediate resonances and decay products |
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| 348 | for(int i =1; i < int(pieces.size()); ++i){ |
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| 349 | // Seperate strings into intermediate and outgoing, if not already done |
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| 350 | int k = pieces[i].find(">", 0); |
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| 351 | |
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| 352 | string intermediate = (pieces[i].find(">", 0) != string::npos) ? |
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| 353 | pieces[i].substr(0,k) : ""; |
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| 354 | string outgoing = (pieces[i].find(">", 0) != string::npos) ? |
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| 355 | pieces[i].substr(k+1,pieces[i].size()) : pieces[i]; |
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| 356 | |
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| 357 | // Get intermediate particles |
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| 358 | for(int j=0; j < nInt; ++j) { |
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| 359 | for(int n = intermediate.find(interParticleNamesMG[j], 0); |
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| 360 | n != int(string::npos); |
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| 361 | n = intermediate.find(interParticleNamesMG[j], n)) { |
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| 362 | inter.push_back(interParticleNumbers[j]); |
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| 363 | intermediate.erase(intermediate.begin()+n, |
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| 364 | intermediate.begin()+n+interParticleNamesMG[j].size()); |
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| 365 | n=0; |
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| 366 | } |
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| 367 | } |
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| 368 | |
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| 369 | // Get outgoing particles |
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| 370 | for(int j=0; j < nOut; ++j) { |
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| 371 | for(int n = outgoing.find(outParticleNamesMG[j], 0); |
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| 372 | n != int(string::npos); |
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| 373 | n = outgoing.find(outParticleNamesMG[j], n)) { |
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| 374 | outgo.push_back(outParticleNumbers[j]); |
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| 375 | outgoing.erase(outgoing.begin()+n, |
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| 376 | outgoing.begin()+n+outParticleNamesMG[j].size()); |
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| 377 | n=0; |
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| 378 | } |
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| 379 | } |
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| 380 | |
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| 381 | // For arbitrary or non-existing intermediate, remember zero for each |
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| 382 | // two outgoing particles, without bosons. |
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| 383 | if (inter.empty()) { |
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| 384 | |
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| 385 | // For final state bosons, bookkeep the final state boson as |
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| 386 | // intermediate as well. |
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| 387 | int nBosons = 0; |
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| 388 | for(int l=0; l < int(outgo.size()); ++l) |
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| 389 | if ( (abs(outgo[l]) > 20 && abs(outgo[l]) <= 25) || outgo[l] == 2400) |
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| 390 | nBosons++; |
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| 391 | |
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| 392 | int nZeros = (outgo.size() - nBosons)/2; |
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| 393 | for(int l=0; l < nZeros; ++l) |
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| 394 | inter.push_back(0); |
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| 395 | } |
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| 396 | |
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| 397 | // For final state bosons, bookkeep the final state boson as |
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| 398 | // intermediate as well. |
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| 399 | for(int l=0; l < int(outgo.size()); ++l) |
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| 400 | if ( (abs(outgo[l]) > 20 && abs(outgo[l]) <= 25) || outgo[l] == 2400) |
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| 401 | inter.push_back(outgo[l]); |
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| 402 | |
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| 403 | } |
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| 404 | |
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| 405 | } else { |
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| 406 | |
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| 407 | cout << "Reading of tms and hard process information from LHEF currently" |
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| 408 | << " only automated for MadEvent- or SHERPA-produced LHEF" << endl; |
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| 409 | int tempInt = 0; |
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| 410 | cout << "Use default process pp -> e+ve + jets? (0:no / 1:yes): "; |
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| 411 | cin >> tempInt; |
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| 412 | cout << endl; |
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| 413 | |
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| 414 | if (tempInt == 0){ |
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| 415 | tempInt = 0; |
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| 416 | double tempDouble = 0.0; |
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| 417 | cout << "Please specify merging scale (kT Durham, in GeV): "; |
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| 418 | cin >> tempDouble; |
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| 419 | tms = tempDouble; |
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| 420 | meGenType = -1; |
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| 421 | cout << endl; |
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| 422 | cout << "Please specify first incoming particle "; |
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| 423 | cout << "(p+/p- = 2212, e- = 11, e+ = -11): "; |
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| 424 | cin >> tempInt; |
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| 425 | incom.push_back(tempInt); |
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| 426 | tempInt = 0; |
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| 427 | cout << endl; |
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| 428 | cout << "Please specify second incoming particle "; |
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| 429 | cout << "(p+/p- = 2212, e- = 11, e+ = -11): "; |
---|
| 430 | cin >> tempInt; |
---|
| 431 | incom.push_back(tempInt); |
---|
| 432 | tempInt = 0; |
---|
| 433 | cout << endl; |
---|
| 434 | cout << "Please specify intermediate particle, if any "; |
---|
| 435 | cout << "(0 for none, else PDG code): "; |
---|
| 436 | cin >> tempInt; |
---|
| 437 | inter.push_back(tempInt); |
---|
| 438 | cout << endl; |
---|
| 439 | do { |
---|
| 440 | tempInt = 0; |
---|
| 441 | cout << "Please specify outgoing particle "; |
---|
| 442 | cout << "(jet=2212, else PDG code, exit with 99): "; |
---|
| 443 | cin >> tempInt; |
---|
| 444 | if (tempInt != 99) outgo.push_back(tempInt); |
---|
| 445 | } while(tempInt != 99); |
---|
| 446 | cout << endl; |
---|
| 447 | } else { |
---|
| 448 | cout << "LHE file not produced by SHERPA or MG/ME - "; |
---|
| 449 | cout << "Using default process and tms" << endl; |
---|
| 450 | incom.push_back(2212); |
---|
| 451 | incom.push_back(2212); |
---|
| 452 | inter.push_back(24); |
---|
| 453 | outgo.push_back(-11); |
---|
| 454 | outgo.push_back(12); |
---|
| 455 | tms = 10.; |
---|
| 456 | meGenType = -1; |
---|
| 457 | } |
---|
| 458 | } |
---|
| 459 | |
---|
| 460 | // Now store incoming, intermediate and outgoing |
---|
| 461 | // Set intermediate tags |
---|
| 462 | for(int i=0; i < int(inter.size()); ++i) |
---|
| 463 | hardIntermediate.push_back(inter[i]); |
---|
| 464 | |
---|
| 465 | // Set the incoming particle tags |
---|
| 466 | if (incom.size() != 2) |
---|
| 467 | cout << "Only two incoming particles allowed" << endl; |
---|
| 468 | else { |
---|
| 469 | hardIncoming1 = incom[0]; |
---|
| 470 | hardIncoming2 = incom[1]; |
---|
| 471 | } |
---|
| 472 | |
---|
| 473 | // Remember final state bosons |
---|
| 474 | int nBosons = 0; |
---|
| 475 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 476 | if ( (abs(outgo[i]) > 20 && abs(outgo[i]) <= 25) || outgo[i] == 2400) |
---|
| 477 | nBosons++; |
---|
| 478 | // Remember b-quark container |
---|
| 479 | int nBQuarks = 0; |
---|
| 480 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 481 | if ( outgo[i] == 5000) |
---|
| 482 | nBQuarks++; |
---|
| 483 | // Remember jet container |
---|
| 484 | int nJets = 0; |
---|
| 485 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 486 | if ( outgo[i] == 2212) |
---|
| 487 | nJets++; |
---|
| 488 | // Remember lepton container |
---|
| 489 | int nLeptons = 0; |
---|
| 490 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 491 | if ( outgo[i] == 1100) |
---|
| 492 | nLeptons++; |
---|
| 493 | // Remember lepton container |
---|
| 494 | int nNeutrinos = 0; |
---|
| 495 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 496 | if ( outgo[i] == 1200) |
---|
| 497 | nNeutrinos++; |
---|
| 498 | int nContainers = nLeptons + nNeutrinos + nJets + nBQuarks; |
---|
| 499 | |
---|
| 500 | // Set final particle identifiers |
---|
| 501 | if ( (outgo.size() - nBosons - nContainers)%2 == 1) { |
---|
| 502 | cout << "Only even number of outgoing particles allowed" << endl; |
---|
| 503 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 504 | cout << outgo[i] << endl; |
---|
| 505 | } else { |
---|
| 506 | |
---|
| 507 | // Push back particles / antiparticles |
---|
| 508 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 509 | if (outgo[i] > 0 |
---|
| 510 | && outgo[i] != 2212 |
---|
| 511 | && outgo[i] != 5000 |
---|
| 512 | && outgo[i] != 1100 |
---|
| 513 | && outgo[i] != 1200 |
---|
| 514 | && outgo[i] != 2400 |
---|
| 515 | && outgo[i] != 1000022) |
---|
| 516 | hardOutgoing2.push_back( outgo[i]); |
---|
| 517 | else if (outgo[i] < 0) |
---|
| 518 | hardOutgoing1.push_back( outgo[i]); |
---|
| 519 | |
---|
| 520 | // Save final state W-boson container as particle |
---|
| 521 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 522 | if ( outgo[i] == 2400) |
---|
| 523 | hardOutgoing2.push_back( outgo[i]); |
---|
| 524 | |
---|
| 525 | // Push back jets, distribute evenly amongst particles / antiparticles |
---|
| 526 | // Push back majorana particles, distribute evenly |
---|
| 527 | int iNow = 0; |
---|
| 528 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 529 | if ( (outgo[i] == 2212 |
---|
| 530 | || outgo[i] == 5000 |
---|
| 531 | || outgo[i] == 1200 |
---|
| 532 | || outgo[i] == 1000022) |
---|
| 533 | && iNow%2 == 0 ){ |
---|
| 534 | hardOutgoing2.push_back( outgo[i]); |
---|
| 535 | iNow++; |
---|
| 536 | } else if ( (outgo[i] == 2212 |
---|
| 537 | || outgo[i] == 5000 |
---|
| 538 | || outgo[i] == 1100 |
---|
| 539 | || outgo[i] == 1000022) |
---|
| 540 | && iNow%2 == 1 ){ |
---|
| 541 | hardOutgoing1.push_back( outgo[i]); |
---|
| 542 | iNow++; |
---|
| 543 | } |
---|
| 544 | } |
---|
| 545 | |
---|
| 546 | // Done |
---|
| 547 | } |
---|
| 548 | |
---|
| 549 | //-------------------------------------------------------------------------- |
---|
| 550 | |
---|
| 551 | // Function to translate a string specitying the core process into the |
---|
| 552 | // internal notation |
---|
| 553 | // Currently, the input string has to be in MadEvent notation |
---|
| 554 | |
---|
| 555 | void HardProcess::translateProcessString( string process){ |
---|
| 556 | |
---|
| 557 | vector <int> incom; |
---|
| 558 | vector <int> inter; |
---|
| 559 | vector <int> outgo; |
---|
| 560 | // Particle identifiers, ordered in such a way that e.g. the "u" |
---|
| 561 | // in a mu is not mistaken for an u quark |
---|
| 562 | int inParticleNumbers[] = { |
---|
| 563 | // Leptons |
---|
| 564 | -11,11,-12,12,-13,13,-14,14,-15,15,-16,16, |
---|
| 565 | // Jet container |
---|
| 566 | 2212,2212,0,0,0,0, |
---|
| 567 | // Quarks |
---|
| 568 | -1,1,-2,2,-3,3,-4,4,-5,5,-6,6}; |
---|
| 569 | string inParticleNamesMG[] = { |
---|
| 570 | // Leptons |
---|
| 571 | "e+","e-","ve~","ve","mu+","mu-","vm~","vm","ta+","ta-","vt~","vt", |
---|
| 572 | // Jet container |
---|
| 573 | "p~","p","l+","l-","vl~","vl", |
---|
| 574 | // Quarks |
---|
| 575 | "d~","d","u~","u","s~","s","c~","c","b~","b","t~","t"}; |
---|
| 576 | |
---|
| 577 | // Declare intermediate particle identifiers |
---|
| 578 | int interParticleNumbers[] = { |
---|
| 579 | // Electroweak gauge bosons |
---|
| 580 | 22,23,-24,24,25,2400, |
---|
| 581 | // Top quarks |
---|
| 582 | -6,6, |
---|
| 583 | // Dummy index as back-up |
---|
| 584 | 0, |
---|
| 585 | // All squarks |
---|
| 586 | -1000001,1000001,-1000002,1000002,-1000003,1000003,-1000004,1000004, |
---|
| 587 | -1000005,1000005,-1000006,1000006,-2000001,2000001,-2000002,2000002, |
---|
| 588 | -2000003,2000003,-2000004,2000004,-2000005,2000005,-2000006,2000006}; |
---|
| 589 | // Declare names of intermediate particles |
---|
| 590 | string interParticleNamesMG[] = { |
---|
| 591 | // Electroweak gauge bosons |
---|
| 592 | "a","z","w-","w+","h","W", |
---|
| 593 | // Top quarks |
---|
| 594 | "t~","t", |
---|
| 595 | // Dummy index as back-up |
---|
| 596 | "xx", |
---|
| 597 | // All squarks |
---|
| 598 | "dl~","dl","ul~","ul","sl~","sl","cl~","cl","b1~","b1","t1~","t1", |
---|
| 599 | "dr~","dr","ur~","ur","sr~","sr","cr~","cr","b2~","b2","t2~","t2"}; |
---|
| 600 | |
---|
| 601 | // Declare final state particle identifiers |
---|
| 602 | int outParticleNumbers[] = { |
---|
| 603 | // Leptons |
---|
| 604 | -11,11,-12,12,-13,13,-14,14,-15,15,-16,16, |
---|
| 605 | // Jet container and lepton containers |
---|
| 606 | 2212,2212,0,0,0,0,1200,1100,5000, |
---|
| 607 | // Quarks |
---|
| 608 | -1,1,-2,2,-3,3,-4,4,-5,5,-6,6, |
---|
| 609 | // SM uncoloured bosons |
---|
| 610 | 22,23,-24,24,25,2400, |
---|
| 611 | // Neutralino in SUSY |
---|
| 612 | 1000022, |
---|
| 613 | // All squarks |
---|
| 614 | -1000001,1000001,-1000002,1000002,-1000003,1000003,-1000004,1000004, |
---|
| 615 | -1000005,1000005,-1000006,1000006,-2000001,2000001,-2000002,2000002, |
---|
| 616 | -2000003,2000003,-2000004,2000004,-2000005,2000005,-2000006,2000006}; |
---|
| 617 | // Declare names of final state particles |
---|
| 618 | string outParticleNamesMG[] = { |
---|
| 619 | // Leptons |
---|
| 620 | "e+","e-","ve~","ve","mu+","mu-","vm~","vm","ta+","ta-","vt~","vt", |
---|
| 621 | // Jet container and lepton containers |
---|
| 622 | "j~","j","l+","l-","vl~","vl","NEUTRINOS","LEPTONS","BQUARKS", |
---|
| 623 | // Quarks |
---|
| 624 | "d~","d","u~","u","s~","s","c~","c","b~","b","t~","t", |
---|
| 625 | // SM uncoloured bosons |
---|
| 626 | "a","z","w-","w+","h","W", |
---|
| 627 | // Neutralino in SUSY |
---|
| 628 | "n1", |
---|
| 629 | // All squarks |
---|
| 630 | "dl~","dl","ul~","ul","sl~","sl","cl~","cl","b1~","b1","t1~","t1", |
---|
| 631 | "dr~","dr","ur~","ur","sr~","sr","cr~","cr","b2~","b2","t2~","t2"}; |
---|
| 632 | |
---|
| 633 | // Declare size of particle name arrays |
---|
| 634 | int nIn = 30; |
---|
| 635 | int nInt = 33; |
---|
| 636 | int nOut = 64; |
---|
| 637 | |
---|
| 638 | // Start mapping user-defined particles onto particle ids. |
---|
| 639 | //string fullProc = "pp>{blaa,124}LEPTONS,NEUTRINOS"; |
---|
| 640 | string fullProc = process; |
---|
| 641 | |
---|
| 642 | // Find user-defined hard process content |
---|
| 643 | // Count number of user particles |
---|
| 644 | int nUserParticles = 0; |
---|
| 645 | for(int n = fullProc.find("{", 0); n != int(string::npos); |
---|
| 646 | n = fullProc.find("{", n)) { |
---|
| 647 | nUserParticles++; |
---|
| 648 | n++; |
---|
| 649 | } |
---|
| 650 | // Cut user-defined particles from remaining process |
---|
| 651 | vector <string> userParticleStrings; |
---|
| 652 | for(int i =0; i < nUserParticles;++i) { |
---|
| 653 | int n = fullProc.find("{", 0); |
---|
| 654 | userParticleStrings.push_back(fullProc.substr(0,n)); |
---|
| 655 | fullProc = fullProc.substr(n+1,fullProc.size()); |
---|
| 656 | } |
---|
| 657 | // Cut remaining process string from rest |
---|
| 658 | if (nUserParticles > 0) |
---|
| 659 | userParticleStrings.push_back( |
---|
| 660 | fullProc.substr( 0, fullProc.find("}",0) ) ); |
---|
| 661 | // Remove curly brackets and whitespace |
---|
| 662 | for(int i =0; i < int(userParticleStrings.size());++i) { |
---|
| 663 | while(userParticleStrings[i].find("{", 0) != string::npos) |
---|
| 664 | userParticleStrings[i].erase(userParticleStrings[i].begin() |
---|
| 665 | +userParticleStrings[i].find("{", 0)); |
---|
| 666 | while(userParticleStrings[i].find("}", 0) != string::npos) |
---|
| 667 | userParticleStrings[i].erase(userParticleStrings[i].begin() |
---|
| 668 | +userParticleStrings[i].find("}", 0)); |
---|
| 669 | while(userParticleStrings[i].find(" ", 0) != string::npos) |
---|
| 670 | userParticleStrings[i].erase(userParticleStrings[i].begin() |
---|
| 671 | +userParticleStrings[i].find(" ", 0)); |
---|
| 672 | } |
---|
| 673 | // Convert particle numbers in user particle to integers |
---|
| 674 | vector<int>userParticleNumbers; |
---|
| 675 | if ( int(userParticleStrings.size()) > 1) { |
---|
| 676 | for( int i = 1; i < int(userParticleStrings.size()); ++i) { |
---|
| 677 | userParticleNumbers.push_back( |
---|
| 678 | atoi((char*)userParticleStrings[i].substr( |
---|
| 679 | userParticleStrings[i].find(",",0)+1, |
---|
| 680 | userParticleStrings[i].size()).c_str() ) ); |
---|
| 681 | } |
---|
| 682 | } |
---|
| 683 | |
---|
| 684 | // Save remaining process string |
---|
| 685 | if (nUserParticles > 0) |
---|
| 686 | userParticleStrings.push_back( |
---|
| 687 | fullProc.substr( |
---|
| 688 | fullProc.find("}",0)+1, fullProc.size() ) ); |
---|
| 689 | // Remove curly brackets and whitespace |
---|
| 690 | for( int i = 0; i < int(userParticleStrings.size()); ++i) { |
---|
| 691 | while(userParticleStrings[i].find("{", 0) != string::npos) |
---|
| 692 | userParticleStrings[i].erase(userParticleStrings[i].begin() |
---|
| 693 | +userParticleStrings[i].find("{", 0)); |
---|
| 694 | while(userParticleStrings[i].find("}", 0) != string::npos) |
---|
| 695 | userParticleStrings[i].erase(userParticleStrings[i].begin() |
---|
| 696 | +userParticleStrings[i].find("}", 0)); |
---|
| 697 | while(userParticleStrings[i].find(" ", 0) != string::npos) |
---|
| 698 | userParticleStrings[i].erase(userParticleStrings[i].begin() |
---|
| 699 | +userParticleStrings[i].find(" ", 0)); |
---|
| 700 | } |
---|
| 701 | |
---|
| 702 | // Start mapping residual process string onto particle IDs. |
---|
| 703 | // Declare leftover process after user-defined particles have been converted |
---|
| 704 | string residualProc; |
---|
| 705 | if ( int(userParticleStrings.size()) > 1 ) |
---|
| 706 | residualProc = userParticleStrings.front() + userParticleStrings.back(); |
---|
| 707 | else |
---|
| 708 | residualProc = fullProc; |
---|
| 709 | |
---|
| 710 | // Remove comma separation |
---|
| 711 | while(residualProc.find(",", 0) != string::npos) |
---|
| 712 | residualProc.erase(residualProc.begin()+residualProc.find(",",0)); |
---|
| 713 | |
---|
| 714 | // Count number of resonances |
---|
| 715 | int appearances = 0; |
---|
| 716 | for(int n = residualProc.find("(", 0); n != int(string::npos); |
---|
| 717 | n = residualProc.find("(", n)) { |
---|
| 718 | appearances++; |
---|
| 719 | n++; |
---|
| 720 | } |
---|
| 721 | |
---|
| 722 | // Cut string in incoming, resonance+decay and outgoing pieces |
---|
| 723 | vector <string> pieces; |
---|
| 724 | for(int i =0; i < appearances;++i) { |
---|
| 725 | int n = residualProc.find("(", 0); |
---|
| 726 | pieces.push_back(residualProc.substr(0,n)); |
---|
| 727 | residualProc = residualProc.substr(n+1,residualProc.size()); |
---|
| 728 | } |
---|
| 729 | // Cut last resonance from rest |
---|
| 730 | if (appearances > 0) { |
---|
| 731 | pieces.push_back( residualProc.substr(0,residualProc.find(")",0)) ); |
---|
| 732 | pieces.push_back( residualProc.substr( |
---|
| 733 | residualProc.find(")",0)+1, residualProc.size()) ); |
---|
| 734 | } |
---|
| 735 | |
---|
| 736 | // If the string was not cut into pieces, i.e. no resonance was |
---|
| 737 | // required, cut string using '>' as delimiter |
---|
| 738 | if (pieces.empty() ){ |
---|
| 739 | appearances = 0; |
---|
| 740 | for(int n = residualProc.find(">", 0); n != int(string::npos); |
---|
| 741 | n = residualProc.find(">", n)) { |
---|
| 742 | appearances++; |
---|
| 743 | n++; |
---|
| 744 | } |
---|
| 745 | |
---|
| 746 | // Cut string in incoming and outgoing pieces |
---|
| 747 | for(int i =0; i < appearances;++i) { |
---|
| 748 | int n = residualProc.find(">", 0); |
---|
| 749 | pieces.push_back(residualProc.substr(0,n)); |
---|
| 750 | residualProc = residualProc.substr(n+1,residualProc.size()); |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | if (appearances == 1) pieces.push_back(residualProc); |
---|
| 754 | if (appearances > 1) { |
---|
| 755 | pieces.push_back( residualProc.substr(0,residualProc.find(">",0)) ); |
---|
| 756 | pieces.push_back( residualProc.substr( |
---|
| 757 | residualProc.find(">",0)+1, residualProc.size()) ); |
---|
| 758 | } |
---|
| 759 | } |
---|
| 760 | |
---|
| 761 | // Get incoming particles |
---|
| 762 | for(int i=0; i < nIn; ++i) { |
---|
| 763 | for(int n = pieces[0].find(inParticleNamesMG[i], 0); |
---|
| 764 | n != int(string::npos); |
---|
| 765 | n = pieces[0].find(inParticleNamesMG[i], n)) { |
---|
| 766 | incom.push_back(inParticleNumbers[i]); |
---|
| 767 | pieces[0].erase(pieces[0].begin()+n, |
---|
| 768 | pieces[0].begin()+n+inParticleNamesMG[i].size()); |
---|
| 769 | n=0; |
---|
| 770 | } |
---|
| 771 | } |
---|
| 772 | |
---|
| 773 | // Check intermediate resonances and decay products |
---|
| 774 | for(int i =1; i < int(pieces.size()); ++i){ |
---|
| 775 | // Seperate strings into intermediate and outgoing, if not already done |
---|
| 776 | int k = pieces[i].find(">", 0); |
---|
| 777 | |
---|
| 778 | string intermediate = (pieces[i].find(">", 0) != string::npos) ? |
---|
| 779 | pieces[i].substr(0,k) : ""; |
---|
| 780 | string outgoing = (pieces[i].find(">", 0) != string::npos) ? |
---|
| 781 | pieces[i].substr(k+1,pieces[i].size()) : pieces[i]; |
---|
| 782 | |
---|
| 783 | // Get intermediate particles |
---|
| 784 | for(int j=0; j < nInt; ++j) { |
---|
| 785 | for(int n = intermediate.find(interParticleNamesMG[j], 0); |
---|
| 786 | n != int(string::npos); |
---|
| 787 | n = intermediate.find(interParticleNamesMG[j], n)) { |
---|
| 788 | inter.push_back(interParticleNumbers[j]); |
---|
| 789 | intermediate.erase(intermediate.begin()+n, |
---|
| 790 | intermediate.begin()+n+interParticleNamesMG[j].size()); |
---|
| 791 | n=0; |
---|
| 792 | } |
---|
| 793 | } |
---|
| 794 | |
---|
| 795 | // Get outgoing particles |
---|
| 796 | for(int j=0; j < nOut; ++j) { |
---|
| 797 | for(int n = outgoing.find(outParticleNamesMG[j], 0); |
---|
| 798 | n != int(string::npos); |
---|
| 799 | n = outgoing.find(outParticleNamesMG[j], n)) { |
---|
| 800 | outgo.push_back(outParticleNumbers[j]); |
---|
| 801 | outgoing.erase(outgoing.begin()+n, |
---|
| 802 | outgoing.begin()+n+outParticleNamesMG[j].size()); |
---|
| 803 | n=0; |
---|
| 804 | } |
---|
| 805 | } |
---|
| 806 | |
---|
| 807 | // For arbitrary or non-existing intermediate, remember zero for each |
---|
| 808 | // two outgoing particles, without bosons. |
---|
| 809 | if (inter.empty()) { |
---|
| 810 | |
---|
| 811 | // For final state bosons, bookkeep the final state boson as |
---|
| 812 | // intermediate as well. |
---|
| 813 | int nBosons = 0; |
---|
| 814 | for(int l=0; l < int(outgo.size()); ++l) |
---|
| 815 | if ( (abs(outgo[l]) > 20 && abs(outgo[l]) <= 25) || outgo[l] == 2400) |
---|
| 816 | nBosons++; |
---|
| 817 | |
---|
| 818 | int nZeros = (outgo.size() - nBosons)/2; |
---|
| 819 | for(int l=0; l < nZeros; ++l) |
---|
| 820 | inter.push_back(0); |
---|
| 821 | } |
---|
| 822 | |
---|
| 823 | // For final state bosons, bookkeep the final state boson as |
---|
| 824 | // intermediate as well. |
---|
| 825 | for(int l=0; l < int(outgo.size()); ++l) |
---|
| 826 | if ( (abs(outgo[l]) > 20 && abs(outgo[l]) <= 25) || outgo[l] == 2400) |
---|
| 827 | inter.push_back(outgo[l]); |
---|
| 828 | |
---|
| 829 | } |
---|
| 830 | |
---|
| 831 | // Now store incoming, intermediate and outgoing |
---|
| 832 | // Set intermediate tags |
---|
| 833 | for(int i=0; i < int(inter.size()); ++i) |
---|
| 834 | hardIntermediate.push_back(inter[i]); |
---|
| 835 | |
---|
| 836 | // Set the incoming particle tags |
---|
| 837 | if (incom.size() != 2) |
---|
| 838 | cout << "Only two incoming particles allowed" << endl; |
---|
| 839 | else { |
---|
| 840 | hardIncoming1 = incom[0]; |
---|
| 841 | hardIncoming2 = incom[1]; |
---|
| 842 | } |
---|
| 843 | |
---|
| 844 | // Remember final state bosons |
---|
| 845 | int nBosons = 0; |
---|
| 846 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 847 | if ( (abs(outgo[i]) > 20 && abs(outgo[i]) <= 25) || outgo[i] == 2400) |
---|
| 848 | nBosons++; |
---|
| 849 | // Remember b-quark container |
---|
| 850 | int nBQuarks = 0; |
---|
| 851 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 852 | if ( outgo[i] == 5000) |
---|
| 853 | nBQuarks++; |
---|
| 854 | // Remember jet container |
---|
| 855 | int nJets = 0; |
---|
| 856 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 857 | if ( outgo[i] == 2212) |
---|
| 858 | nJets++; |
---|
| 859 | // Remember lepton container |
---|
| 860 | int nLeptons = 0; |
---|
| 861 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 862 | if ( outgo[i] == 1100) |
---|
| 863 | nLeptons++; |
---|
| 864 | // Remember lepton container |
---|
| 865 | int nNeutrinos = 0; |
---|
| 866 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 867 | if ( outgo[i] == 1200) |
---|
| 868 | nNeutrinos++; |
---|
| 869 | int nContainers = nLeptons + nNeutrinos + nJets + nBQuarks; |
---|
| 870 | |
---|
| 871 | // Set final particle identifiers |
---|
| 872 | if ( (outgo.size() - nBosons - nContainers)%2 == 1) { |
---|
| 873 | cout << "Only even number of outgoing particles allowed" << endl; |
---|
| 874 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 875 | cout << outgo[i] << endl; |
---|
| 876 | } else { |
---|
| 877 | |
---|
| 878 | // Start with user-defined particles. |
---|
| 879 | for( int i = 0; i < int(userParticleNumbers.size()); ++i) |
---|
| 880 | if (userParticleNumbers[i] > 0) { |
---|
| 881 | hardOutgoing2.push_back( userParticleNumbers[i]); |
---|
| 882 | hardIntermediate.push_back(0); |
---|
| 883 | // For non-existing intermediate, remember zero. |
---|
| 884 | } else if (userParticleNumbers[i] < 0) { |
---|
| 885 | hardOutgoing1.push_back( userParticleNumbers[i]); |
---|
| 886 | // For non-existing intermediate, remember zero. |
---|
| 887 | hardIntermediate.push_back(0); |
---|
| 888 | } |
---|
| 889 | |
---|
| 890 | // Push back particles / antiparticles |
---|
| 891 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 892 | if (outgo[i] > 0 |
---|
| 893 | && outgo[i] != 2212 |
---|
| 894 | && outgo[i] != 5000 |
---|
| 895 | && outgo[i] != 1100 |
---|
| 896 | && outgo[i] != 1200 |
---|
| 897 | && outgo[i] != 2400 |
---|
| 898 | && outgo[i] != 1000022) |
---|
| 899 | hardOutgoing2.push_back( outgo[i]); |
---|
| 900 | else if (outgo[i] < 0) |
---|
| 901 | hardOutgoing1.push_back( outgo[i]); |
---|
| 902 | |
---|
| 903 | // Save final state W-boson container as particle |
---|
| 904 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 905 | if ( outgo[i] == 2400) |
---|
| 906 | hardOutgoing2.push_back( outgo[i]); |
---|
| 907 | |
---|
| 908 | // Push back jets, distribute evenly among particles / antiparticles |
---|
| 909 | // Push back majorana particles, distribute evenly |
---|
| 910 | int iNow = 0; |
---|
| 911 | for(int i=0; i < int(outgo.size()); ++i) |
---|
| 912 | if ( (outgo[i] == 2212 |
---|
| 913 | || outgo[i] == 5000 |
---|
| 914 | || outgo[i] == 1200 |
---|
| 915 | || outgo[i] == 1000022) |
---|
| 916 | && iNow%2 == 0 ){ |
---|
| 917 | hardOutgoing2.push_back( outgo[i]); |
---|
| 918 | iNow++; |
---|
| 919 | } else if ( (outgo[i] == 2212 |
---|
| 920 | || outgo[i] == 5000 |
---|
| 921 | || outgo[i] == 1100 |
---|
| 922 | || outgo[i] == 1000022) |
---|
| 923 | && iNow%2 == 1 ){ |
---|
| 924 | hardOutgoing1.push_back( outgo[i]); |
---|
| 925 | iNow++; |
---|
| 926 | } |
---|
| 927 | } |
---|
| 928 | |
---|
| 929 | // Done |
---|
| 930 | } |
---|
| 931 | |
---|
| 932 | //-------------------------------------------------------------------------- |
---|
| 933 | |
---|
| 934 | // Function to check if the candidates stored in Pos1 and Pos2, together with |
---|
| 935 | // a proposed candidate iPos are allowed. |
---|
| 936 | |
---|
| 937 | bool HardProcess::allowCandidates(int iPos, vector<int> Pos1, |
---|
| 938 | vector<int> Pos2, const Event& event){ |
---|
| 939 | |
---|
| 940 | bool allowed = true; |
---|
| 941 | |
---|
| 942 | // Find colour-partner of new candidate |
---|
| 943 | int type = (event[iPos].col() > 0) ? 1 : (event[iPos].acol() > 0) ? -1 : 0; |
---|
| 944 | |
---|
| 945 | if (type == 0) return true; |
---|
| 946 | |
---|
| 947 | if (type == 1){ |
---|
| 948 | int col = event[iPos].col(); |
---|
| 949 | int iPartner = 0; |
---|
| 950 | for(int i=0; i < int(event.size()); ++i) |
---|
| 951 | if ( i != iPos |
---|
| 952 | && (( event[i].isFinal() && event[i].acol() == col) |
---|
| 953 | ||( event[i].status() == -21 && event[i].col() == col) )) |
---|
| 954 | iPartner = i; |
---|
| 955 | |
---|
| 956 | vector<int> partners; |
---|
| 957 | for(int i=0; i < int(event.size()); ++i) |
---|
| 958 | for(int j=0; j < int(Pos1.size()); ++j) |
---|
| 959 | if ( Pos1[j] != 0 && i != Pos1[j] && event[Pos1[j]].colType() != 0 |
---|
| 960 | && (( event[i].isFinal() && event[i].col() == event[Pos1[j]].acol()) |
---|
| 961 | ||( event[i].status() == -21 |
---|
| 962 | && event[i].acol() == event[Pos1[j]].acol()) )) |
---|
| 963 | partners.push_back(i); |
---|
| 964 | |
---|
| 965 | // Never allow equal initial partners! |
---|
| 966 | if (event[iPartner].status() == -21){ |
---|
| 967 | for(int i=0; i < int(partners.size()); ++i) |
---|
| 968 | if ( partners[i] == iPartner) |
---|
| 969 | allowed = false; |
---|
| 970 | } |
---|
| 971 | |
---|
| 972 | } else { |
---|
| 973 | int col = event[iPos].acol(); |
---|
| 974 | int iPartner = 0; |
---|
| 975 | for(int i=0; i < int(event.size()); ++i) |
---|
| 976 | if ( i != iPos |
---|
| 977 | && (( event[i].isFinal() && event[i].col() == col) |
---|
| 978 | ||(!event[i].isFinal() && event[i].acol() == col) )) |
---|
| 979 | iPartner = i; |
---|
| 980 | |
---|
| 981 | vector<int> partners; |
---|
| 982 | for(int i=0; i < int(event.size()); ++i) |
---|
| 983 | for(int j=0; j < int(Pos2.size()); ++j) |
---|
| 984 | if ( Pos2[j] != 0 && i != Pos2[j] && event[Pos2[j]].colType() != 0 |
---|
| 985 | && (( event[i].isFinal() && event[i].acol() == event[Pos2[j]].col()) |
---|
| 986 | ||( event[i].status() == -21 |
---|
| 987 | && event[i].col() == event[Pos2[j]].col()) )) |
---|
| 988 | partners.push_back(i); |
---|
| 989 | |
---|
| 990 | |
---|
| 991 | // Never allow equal initial partners! |
---|
| 992 | if (event[iPartner].status() == -21){ |
---|
| 993 | for(int i=0; i < int(partners.size()); ++i){ |
---|
| 994 | if ( partners[i] == iPartner) |
---|
| 995 | allowed = false; |
---|
| 996 | } |
---|
| 997 | } |
---|
| 998 | |
---|
| 999 | } |
---|
| 1000 | |
---|
| 1001 | return allowed; |
---|
| 1002 | |
---|
| 1003 | } |
---|
| 1004 | |
---|
| 1005 | //-------------------------------------------------------------------------- |
---|
| 1006 | |
---|
| 1007 | // Function to identify the hard subprocess in the current event |
---|
| 1008 | |
---|
| 1009 | void HardProcess::storeCandidates( const Event& event, string process){ |
---|
| 1010 | |
---|
| 1011 | // Store the reference event |
---|
| 1012 | state.clear(); |
---|
| 1013 | state = event; |
---|
| 1014 | |
---|
| 1015 | // Local copy of intermediate bosons |
---|
| 1016 | vector<int> intermediates; |
---|
| 1017 | for(int i =0; i < int(hardIntermediate.size());++i) |
---|
| 1018 | intermediates.push_back( hardIntermediate[i]); |
---|
| 1019 | |
---|
| 1020 | // Local copy of outpoing partons |
---|
| 1021 | vector<int> outgoing1; |
---|
| 1022 | for(int i =0; i < int(hardOutgoing1.size());++i) |
---|
| 1023 | outgoing1.push_back( hardOutgoing1[i]); |
---|
| 1024 | vector<int> outgoing2; |
---|
| 1025 | for(int i =0; i < int(hardOutgoing2.size());++i) |
---|
| 1026 | outgoing2.push_back( hardOutgoing2[i]); |
---|
| 1027 | |
---|
| 1028 | // Clear positions of intermediate and outgoing particles |
---|
| 1029 | PosIntermediate.resize(0); |
---|
| 1030 | PosOutgoing1.resize(0); |
---|
| 1031 | PosOutgoing2.resize(0); |
---|
| 1032 | for(int i =0; i < int(hardIntermediate.size());++i) |
---|
| 1033 | PosIntermediate.push_back(0); |
---|
| 1034 | for(int i =0; i < int(hardOutgoing1.size());++i) |
---|
| 1035 | PosOutgoing1.push_back(0); |
---|
| 1036 | for(int i =0; i < int(hardOutgoing2.size());++i) |
---|
| 1037 | PosOutgoing2.push_back(0); |
---|
| 1038 | |
---|
| 1039 | // For QCD dijet or e+e- > jets hard process, do not store any candidates, |
---|
| 1040 | // as to not discrimintate clusterings |
---|
| 1041 | if ( process.compare("pp>jj") == 0 |
---|
| 1042 | || process.compare("e+e->jj") == 0 |
---|
| 1043 | || process.compare("e+e->(z>jj)") == 0 ){ |
---|
| 1044 | for(int i =0; i < int(hardOutgoing1.size());++i) |
---|
| 1045 | PosOutgoing1[i] = 0; |
---|
| 1046 | for(int i =0; i < int(hardOutgoing2.size());++i) |
---|
| 1047 | PosOutgoing2[i] = 0; |
---|
| 1048 | // Done |
---|
| 1049 | return; |
---|
| 1050 | } |
---|
| 1051 | |
---|
| 1052 | // Initialise vector of particles that were already identified as |
---|
| 1053 | // hard process particles |
---|
| 1054 | vector<int> iPosChecked; |
---|
| 1055 | |
---|
| 1056 | // If the hard process is specified only by containers, then add all |
---|
| 1057 | // particles matching with the containers to the hard process. |
---|
| 1058 | bool hasOnlyContainers = true; |
---|
| 1059 | for(int i =0; i < int(hardOutgoing1.size());++i) |
---|
| 1060 | if ( hardOutgoing1[i] != 1100 |
---|
| 1061 | && hardOutgoing1[i] != 1200 |
---|
| 1062 | && hardOutgoing1[i] != 5000) |
---|
| 1063 | hasOnlyContainers = false; |
---|
| 1064 | for(int i =0; i < int(hardOutgoing2.size());++i) |
---|
| 1065 | if ( hardOutgoing2[i] != 1100 |
---|
| 1066 | && hardOutgoing2[i] != 1200 |
---|
| 1067 | && hardOutgoing2[i] != 5000) |
---|
| 1068 | hasOnlyContainers = false; |
---|
| 1069 | |
---|
| 1070 | if (hasOnlyContainers){ |
---|
| 1071 | |
---|
| 1072 | PosOutgoing1.resize(0); |
---|
| 1073 | PosOutgoing2.resize(0); |
---|
| 1074 | |
---|
| 1075 | // Try to find all unmatched hard process leptons. |
---|
| 1076 | // Loop through event to find outgoing lepton |
---|
| 1077 | for(int i=0; i < int(event.size()); ++i){ |
---|
| 1078 | |
---|
| 1079 | // Skip non-final particles |
---|
| 1080 | if ( !event[i].isFinal() ) continue; |
---|
| 1081 | |
---|
| 1082 | // Skip all particles that have already been identified |
---|
| 1083 | bool skip = false; |
---|
| 1084 | for(int k=0; k < int(iPosChecked.size()); ++k){ |
---|
| 1085 | if (i == iPosChecked[k]) |
---|
| 1086 | skip = true; |
---|
| 1087 | } |
---|
| 1088 | if (skip) continue; |
---|
| 1089 | |
---|
| 1090 | for(int j=0; j < int(outgoing2.size()); ++j){ |
---|
| 1091 | |
---|
| 1092 | // If the particle matches an outgoing neutrino, save it |
---|
| 1093 | if ( outgoing2[j] == 1100 |
---|
| 1094 | && ( event[i].idAbs() == 11 |
---|
| 1095 | || event[i].idAbs() == 13 |
---|
| 1096 | || event[i].idAbs() == 15) ){ |
---|
| 1097 | PosOutgoing2.push_back(i); |
---|
| 1098 | iPosChecked.push_back(i); |
---|
| 1099 | } |
---|
| 1100 | |
---|
| 1101 | // If the particle matches an outgoing lepton, save it |
---|
| 1102 | if ( outgoing2[j] == 1200 |
---|
| 1103 | && ( event[i].idAbs() == 12 |
---|
| 1104 | || event[i].idAbs() == 14 |
---|
| 1105 | || event[i].idAbs() == 16) ){ |
---|
| 1106 | PosOutgoing2.push_back(i); |
---|
| 1107 | iPosChecked.push_back(i); |
---|
| 1108 | } |
---|
| 1109 | |
---|
| 1110 | // If the particle matches an outgoing b-quark, save it |
---|
| 1111 | if ( outgoing2[j] == 5000 && event[i].idAbs() == 5 ){ |
---|
| 1112 | PosOutgoing2.push_back(i); |
---|
| 1113 | iPosChecked.push_back(i); |
---|
| 1114 | } |
---|
| 1115 | |
---|
| 1116 | } |
---|
| 1117 | |
---|
| 1118 | // Skip all particles that have already been identified |
---|
| 1119 | skip = false; |
---|
| 1120 | for(int k=0; k < int(iPosChecked.size()); ++k){ |
---|
| 1121 | if (i == iPosChecked[k]) |
---|
| 1122 | skip = true; |
---|
| 1123 | } |
---|
| 1124 | if (skip) continue; |
---|
| 1125 | |
---|
| 1126 | for(int j=0; j < int(outgoing1.size()); ++j){ |
---|
| 1127 | |
---|
| 1128 | // If the particle matches an outgoing neutrino, save it |
---|
| 1129 | if ( outgoing1[j] == 1100 |
---|
| 1130 | && ( event[i].idAbs() == 11 |
---|
| 1131 | || event[i].idAbs() == 13 |
---|
| 1132 | || event[i].idAbs() == 15) ){ |
---|
| 1133 | PosOutgoing1.push_back(i); |
---|
| 1134 | iPosChecked.push_back(i); |
---|
| 1135 | } |
---|
| 1136 | |
---|
| 1137 | // If the particle matches an outgoing lepton, save it |
---|
| 1138 | if ( outgoing1[j] == 1200 |
---|
| 1139 | && ( event[i].idAbs() == 12 |
---|
| 1140 | || event[i].idAbs() == 14 |
---|
| 1141 | || event[i].idAbs() == 16) ){ |
---|
| 1142 | PosOutgoing1.push_back(i); |
---|
| 1143 | iPosChecked.push_back(i); |
---|
| 1144 | } |
---|
| 1145 | |
---|
| 1146 | // If the particle matches an outgoing b-quark, save it |
---|
| 1147 | if ( outgoing1[j] == 5000 && event[i].idAbs() == 5 ){ |
---|
| 1148 | PosOutgoing1.push_back(i); |
---|
| 1149 | iPosChecked.push_back(i); |
---|
| 1150 | } |
---|
| 1151 | |
---|
| 1152 | } |
---|
| 1153 | } |
---|
| 1154 | |
---|
| 1155 | // Done |
---|
| 1156 | return; |
---|
| 1157 | } |
---|
| 1158 | |
---|
| 1159 | // Now begin finding candidates when not only containers are used. |
---|
| 1160 | |
---|
| 1161 | // First try to find final state bosons |
---|
| 1162 | for(int i=0; i < int(intermediates.size()); ++i){ |
---|
| 1163 | |
---|
| 1164 | // Do nothing if the intermediate boson is absent |
---|
| 1165 | if (intermediates[i] == 0) continue; |
---|
| 1166 | |
---|
| 1167 | // Do nothing if this boson does not match any final state boson |
---|
| 1168 | bool matchesFinalBoson = false; |
---|
| 1169 | for(int j =0; j< int(outgoing1.size()); ++j){ |
---|
| 1170 | if ( intermediates[i] == outgoing1[j] ) |
---|
| 1171 | matchesFinalBoson = true; |
---|
| 1172 | } |
---|
| 1173 | for(int j =0; j< int(outgoing2.size()); ++j){ |
---|
| 1174 | if ( intermediates[i] == outgoing2[j] ) |
---|
| 1175 | matchesFinalBoson = true; |
---|
| 1176 | } |
---|
| 1177 | if (!matchesFinalBoson) continue; |
---|
| 1178 | |
---|
| 1179 | // Loop through event |
---|
| 1180 | for(int j=0; j < int(event.size()); ++j) { |
---|
| 1181 | // If the particle has a requested intermediate id, check if |
---|
| 1182 | // if is a final state boson |
---|
| 1183 | if ( (event[j].id() == intermediates[i]) |
---|
| 1184 | ||(event[j].idAbs() == 24 && intermediates[i] == 2400) ) { |
---|
| 1185 | PosIntermediate[i] = j; |
---|
| 1186 | intermediates[i] = 0; |
---|
| 1187 | |
---|
| 1188 | for(int k=0; k < int(outgoing1.size()); ++k) { |
---|
| 1189 | if (event[j].id() == outgoing1[k]){ |
---|
| 1190 | PosOutgoing1[k] = j; |
---|
| 1191 | outgoing1[k] = 99; |
---|
| 1192 | } |
---|
| 1193 | } |
---|
| 1194 | |
---|
| 1195 | for(int k=0; k < int(outgoing2.size()); ++k) { |
---|
| 1196 | if (event[j].id() == outgoing2[k]){ |
---|
| 1197 | PosOutgoing2[k] = j; |
---|
| 1198 | outgoing2[k] = 99; |
---|
| 1199 | } |
---|
| 1200 | } |
---|
| 1201 | |
---|
| 1202 | // Check for W-boson container |
---|
| 1203 | for(int k=0; k < int(outgoing2.size()); ++k) { |
---|
| 1204 | if (event[j].idAbs() == 24 && outgoing2[k] == 2400){ |
---|
| 1205 | PosOutgoing2[k] = j; |
---|
| 1206 | outgoing2[k] = 99; |
---|
| 1207 | } |
---|
| 1208 | } |
---|
| 1209 | |
---|
| 1210 | iPosChecked.push_back(j); |
---|
| 1211 | |
---|
| 1212 | } |
---|
| 1213 | } |
---|
| 1214 | } |
---|
| 1215 | |
---|
| 1216 | // Second try to find particles coupled to intermediate bosons |
---|
| 1217 | for(int i=0; i < int(intermediates.size()); ++i){ |
---|
| 1218 | |
---|
| 1219 | // Do nothing if the intermediate boson is absent |
---|
| 1220 | if (intermediates[i] == 0) continue; |
---|
| 1221 | |
---|
| 1222 | // Loop through event |
---|
| 1223 | for(int j=0; j < int(event.size()); ++j) { |
---|
| 1224 | // If the particle has a requested intermediate id, check if |
---|
| 1225 | // daughters are hard process particles |
---|
| 1226 | if ( (event[j].id() == intermediates[i]) |
---|
| 1227 | ||(event[j].idAbs() == 24 && intermediates[i] == 2400) ) { |
---|
| 1228 | // If this particle is a potential intermediate |
---|
| 1229 | PosIntermediate[i] = j; |
---|
| 1230 | intermediates[i] = 0; |
---|
| 1231 | // If id's of daughters are good, store position |
---|
| 1232 | int iPos1 = event[j].daughter1(); |
---|
| 1233 | int iPos2 = event[j].daughter2(); |
---|
| 1234 | |
---|
| 1235 | // Loop through daughters to check if these contain some hard |
---|
| 1236 | // outgoing particles |
---|
| 1237 | for( int k=iPos1; k <= iPos2; ++k){ |
---|
| 1238 | int id = event[k].id(); |
---|
| 1239 | |
---|
| 1240 | // Check if daughter is hard outgoing particle |
---|
| 1241 | for(int l=0; l < int(outgoing2.size()); ++l) |
---|
| 1242 | if ( outgoing2[l] != 99 ){ |
---|
| 1243 | // Found particle id |
---|
| 1244 | if (id == outgoing2[l] |
---|
| 1245 | // Found jet |
---|
| 1246 | || (id > 0 && abs(id) < 10 && outgoing2[l] == 2212) ){ |
---|
| 1247 | // Store position |
---|
| 1248 | PosOutgoing2[l] = k; |
---|
| 1249 | // Remove the matched particle from the list |
---|
| 1250 | outgoing2[l] = 99; |
---|
| 1251 | iPosChecked.push_back(k); |
---|
| 1252 | break; |
---|
| 1253 | } |
---|
| 1254 | |
---|
| 1255 | } |
---|
| 1256 | |
---|
| 1257 | // Check if daughter is hard outgoing antiparticle |
---|
| 1258 | for(int l=0; l < int(outgoing1.size()); ++l) |
---|
| 1259 | if ( outgoing1[l] != 99 ){ |
---|
| 1260 | // Found particle id |
---|
| 1261 | if (id == outgoing1[l] |
---|
| 1262 | // Found jet |
---|
| 1263 | || (id < 0 && abs(id) < 10 && outgoing1[l] == 2212) ){ |
---|
| 1264 | // Store position |
---|
| 1265 | PosOutgoing1[l] = k; |
---|
| 1266 | // Remove the matched particle from the list |
---|
| 1267 | outgoing1[l] = 99; |
---|
| 1268 | iPosChecked.push_back(k); |
---|
| 1269 | break; |
---|
| 1270 | } |
---|
| 1271 | |
---|
| 1272 | } |
---|
| 1273 | |
---|
| 1274 | } // End loop through daughters |
---|
| 1275 | } // End if ids match |
---|
| 1276 | } // End loop through event |
---|
| 1277 | } // End loop though requested intermediates |
---|
| 1278 | |
---|
| 1279 | // If all outgoing particles were found, done |
---|
| 1280 | bool done = true; |
---|
| 1281 | for(int i=0; i < int(outgoing1.size()); ++i) |
---|
| 1282 | if (outgoing1[i] != 99) |
---|
| 1283 | done = false; |
---|
| 1284 | for(int i=0; i < int(outgoing2.size()); ++i) |
---|
| 1285 | if (outgoing2[i] != 99) |
---|
| 1286 | done = false; |
---|
| 1287 | // Return |
---|
| 1288 | if (done) return; |
---|
| 1289 | |
---|
| 1290 | // Leptons not associated with resonance are allowed. |
---|
| 1291 | // Try to find all unmatched hard process leptons. |
---|
| 1292 | // Loop through event to find outgoing lepton |
---|
| 1293 | for(int i=0; i < int(event.size()); ++i){ |
---|
| 1294 | // Skip non-final particles and final partons |
---|
| 1295 | if ( !event[i].isFinal() || event[i].colType() != 0) |
---|
| 1296 | continue; |
---|
| 1297 | // Skip all particles that have already been identified |
---|
| 1298 | bool skip = false; |
---|
| 1299 | for(int k=0; k < int(iPosChecked.size()); ++k){ |
---|
| 1300 | if (i == iPosChecked[k]) |
---|
| 1301 | skip = true; |
---|
| 1302 | } |
---|
| 1303 | if (skip) continue; |
---|
| 1304 | |
---|
| 1305 | // Check if any hard outgoing leptons remain |
---|
| 1306 | for(int j=0; j < int(outgoing2.size()); ++j){ |
---|
| 1307 | // Do nothing if this particle has already be found, |
---|
| 1308 | // or if this particle is a jet or quark |
---|
| 1309 | if ( outgoing2[j] == 99 |
---|
| 1310 | || outgoing2[j] == 2212 |
---|
| 1311 | || abs(outgoing2[j]) < 10) |
---|
| 1312 | continue; |
---|
| 1313 | |
---|
| 1314 | // If the particle matches an outgoing lepton, save it |
---|
| 1315 | if ( event[i].id() == outgoing2[j] ){ |
---|
| 1316 | PosOutgoing2[j] = i; |
---|
| 1317 | outgoing2[j] = 99; |
---|
| 1318 | iPosChecked.push_back(i); |
---|
| 1319 | } |
---|
| 1320 | } |
---|
| 1321 | |
---|
| 1322 | // Check if any hard outgoing antileptons remain |
---|
| 1323 | for(int j=0; j < int(outgoing1.size()); ++j){ |
---|
| 1324 | // Do nothing if this particle has already be found, |
---|
| 1325 | // or if this particle is a jet or quark |
---|
| 1326 | if ( outgoing1[j] == 99 |
---|
| 1327 | || outgoing1[j] == 2212 |
---|
| 1328 | || abs(outgoing1[j]) < 10) |
---|
| 1329 | continue; |
---|
| 1330 | |
---|
| 1331 | // If the particle matches an outgoing lepton, save it |
---|
| 1332 | if (event[i].id() == outgoing1[j] ){ |
---|
| 1333 | PosOutgoing1[j] = i; |
---|
| 1334 | outgoing1[j] = 99; |
---|
| 1335 | iPosChecked.push_back(i); |
---|
| 1336 | } |
---|
| 1337 | } |
---|
| 1338 | } |
---|
| 1339 | |
---|
| 1340 | multimap<int,int> out2copy; |
---|
| 1341 | for(int i=0; i < int(event.size()); ++i) |
---|
| 1342 | for(int j=0; j < int(outgoing2.size()); ++j) |
---|
| 1343 | // Do nothing if this particle has already be found, |
---|
| 1344 | // or if this particle is a jet, lepton container or lepton |
---|
| 1345 | if ( outgoing2[j] != 99 |
---|
| 1346 | && outgoing2[j] != 2212 |
---|
| 1347 | && abs(outgoing2[j]) < 10 |
---|
| 1348 | && event[i].isFinal() |
---|
| 1349 | && event[i].id() == outgoing2[j] ){ |
---|
| 1350 | out2copy.insert(make_pair(j, i)); |
---|
| 1351 | } |
---|
| 1352 | |
---|
| 1353 | multimap<int,int> out1copy; |
---|
| 1354 | for(int i=0; i < int(event.size()); ++i) |
---|
| 1355 | for(int j=0; j < int(outgoing1.size()); ++j) |
---|
| 1356 | // Do nothing if this particle has already be found, |
---|
| 1357 | // or if this particle is a jet, lepton container or lepton |
---|
| 1358 | if ( outgoing1[j] != 99 |
---|
| 1359 | && outgoing1[j] != 2212 |
---|
| 1360 | && abs(outgoing1[j]) < 10 |
---|
| 1361 | && event[i].isFinal() |
---|
| 1362 | && event[i].id() == outgoing1[j] ){ |
---|
| 1363 | out1copy.insert(make_pair(j, i)); |
---|
| 1364 | } |
---|
| 1365 | |
---|
| 1366 | if ( out1copy.size() > out2copy.size()){ |
---|
| 1367 | |
---|
| 1368 | for ( multimap<int, int>::iterator it = out2copy.begin(); |
---|
| 1369 | it != out2copy.end(); ++it ) { |
---|
| 1370 | if ( allowCandidates(it->second, PosOutgoing1, PosOutgoing2, event) ){ |
---|
| 1371 | |
---|
| 1372 | // Save parton |
---|
| 1373 | PosOutgoing2[it->first] = it->second; |
---|
| 1374 | // remove entry form lists |
---|
| 1375 | outgoing2[it->first] = 99; |
---|
| 1376 | iPosChecked.push_back(it->second); |
---|
| 1377 | |
---|
| 1378 | } |
---|
| 1379 | } |
---|
| 1380 | |
---|
| 1381 | for ( multimap<int, int>::iterator it = out1copy.begin(); |
---|
| 1382 | it != out1copy.end(); ++it ) { |
---|
| 1383 | if ( allowCandidates(it->second, PosOutgoing1, PosOutgoing2, event) ){ |
---|
| 1384 | |
---|
| 1385 | // Save parton |
---|
| 1386 | PosOutgoing1[it->first] = it->second; |
---|
| 1387 | // remove entry form lists |
---|
| 1388 | outgoing1[it->first] = 99; |
---|
| 1389 | iPosChecked.push_back(it->second); |
---|
| 1390 | |
---|
| 1391 | } |
---|
| 1392 | } |
---|
| 1393 | |
---|
| 1394 | } else { |
---|
| 1395 | |
---|
| 1396 | for ( multimap<int, int>::iterator it = out1copy.begin(); |
---|
| 1397 | it != out1copy.end(); ++it ) { |
---|
| 1398 | if ( allowCandidates(it->second, PosOutgoing1, PosOutgoing2, event) ){ |
---|
| 1399 | |
---|
| 1400 | // Save parton |
---|
| 1401 | PosOutgoing1[it->first] = it->second; |
---|
| 1402 | // remove entry form lists |
---|
| 1403 | outgoing1[it->first] = 99; |
---|
| 1404 | iPosChecked.push_back(it->second); |
---|
| 1405 | |
---|
| 1406 | } |
---|
| 1407 | } |
---|
| 1408 | |
---|
| 1409 | for ( multimap<int, int>::iterator it = out2copy.begin(); |
---|
| 1410 | it != out2copy.end(); ++it ) { |
---|
| 1411 | if ( allowCandidates(it->second, PosOutgoing1, PosOutgoing2, event) ){ |
---|
| 1412 | |
---|
| 1413 | // Save parton |
---|
| 1414 | PosOutgoing2[it->first] = it->second; |
---|
| 1415 | // remove entry form lists |
---|
| 1416 | outgoing2[it->first] = 99; |
---|
| 1417 | iPosChecked.push_back(it->second); |
---|
| 1418 | |
---|
| 1419 | } |
---|
| 1420 | } |
---|
| 1421 | } |
---|
| 1422 | |
---|
| 1423 | // It sometimes happens that MadEvent does not put a |
---|
| 1424 | // heavy coloured resonance into the LHE file, even if requested. |
---|
| 1425 | // This means that the decay products of this resonance need to be |
---|
| 1426 | // found separately. |
---|
| 1427 | // Loop through event to find hard process (anti)quarks |
---|
| 1428 | for(int i=0; i < int(event.size()); ++i){ |
---|
| 1429 | |
---|
| 1430 | // Skip non-final particles and final partons |
---|
| 1431 | if ( !event[i].isFinal() || event[i].colType() == 0) |
---|
| 1432 | continue; |
---|
| 1433 | |
---|
| 1434 | // Skip all particles that have already been identified |
---|
| 1435 | bool skip = false; |
---|
| 1436 | for(int k=0; k < int(iPosChecked.size()); ++k){ |
---|
| 1437 | if (i == iPosChecked[k]) |
---|
| 1438 | skip = true; |
---|
| 1439 | } |
---|
| 1440 | if (skip) continue; |
---|
| 1441 | |
---|
| 1442 | // Check if any hard outgoing quarks remain |
---|
| 1443 | for(int j=0; j < int(outgoing2.size()); ++j){ |
---|
| 1444 | // Do nothing if this particle has already be found, |
---|
| 1445 | // or if this particle is a jet, lepton container or lepton |
---|
| 1446 | if ( outgoing2[j] == 99 |
---|
| 1447 | || outgoing2[j] == 2212 |
---|
| 1448 | || abs(outgoing2[j]) > 10) |
---|
| 1449 | continue; |
---|
| 1450 | // If the particle matches an outgoing quark, save it |
---|
| 1451 | if (event[i].id() == outgoing2[j]){ |
---|
| 1452 | // Save parton |
---|
| 1453 | PosOutgoing2[j] = i; |
---|
| 1454 | // remove entry form lists |
---|
| 1455 | outgoing2[j] = 99; |
---|
| 1456 | iPosChecked.push_back(i); |
---|
| 1457 | } |
---|
| 1458 | } |
---|
| 1459 | |
---|
| 1460 | // Check if any hard outgoing antiquarks remain |
---|
| 1461 | for(int j=0; j < int(outgoing1.size()); ++j){ |
---|
| 1462 | // Do nothing if this particle has already be found, |
---|
| 1463 | // or if this particle is a jet, lepton container or lepton |
---|
| 1464 | if ( outgoing1[j] == 99 |
---|
| 1465 | || outgoing1[j] == 2212 |
---|
| 1466 | || abs(outgoing1[j]) > 10) |
---|
| 1467 | continue; |
---|
| 1468 | // If the particle matches an outgoing antiquark, save it |
---|
| 1469 | if (event[i].id() == outgoing1[j]){ |
---|
| 1470 | // Save parton |
---|
| 1471 | PosOutgoing1[j] = i; |
---|
| 1472 | // Remove parton from list |
---|
| 1473 | outgoing1[j] = 99; |
---|
| 1474 | iPosChecked.push_back(i); |
---|
| 1475 | } |
---|
| 1476 | } |
---|
| 1477 | } |
---|
| 1478 | |
---|
| 1479 | // Done |
---|
| 1480 | } |
---|
| 1481 | |
---|
| 1482 | //-------------------------------------------------------------------------- |
---|
| 1483 | |
---|
| 1484 | // Function to check if the particle event[iPos] matches any of |
---|
| 1485 | // the stored outgoing particles of the hard subprocess |
---|
| 1486 | |
---|
| 1487 | bool HardProcess::matchesAnyOutgoing(int iPos, const Event& event){ |
---|
| 1488 | |
---|
| 1489 | // Match quantum numbers of any first outgoing candidate |
---|
| 1490 | bool matchQN1 = false; |
---|
| 1491 | // Match quantum numbers of any second outgoing candidate |
---|
| 1492 | bool matchQN2 = false; |
---|
| 1493 | // Match parton in the hard process, |
---|
| 1494 | // or parton from decay of electroweak boson in hard process, |
---|
| 1495 | // or parton from decay of electroweak boson from decay of top |
---|
| 1496 | bool matchHP = false; |
---|
| 1497 | |
---|
| 1498 | // Check outgoing candidates |
---|
| 1499 | for(int i=0; i < int(PosOutgoing1.size()); ++i) |
---|
| 1500 | // Compare particle properties |
---|
| 1501 | if ( event[iPos].id() == state[PosOutgoing1[i]].id() |
---|
| 1502 | && event[iPos].colType() == state[PosOutgoing1[i]].colType() |
---|
| 1503 | && event[iPos].chargeType() == state[PosOutgoing1[i]].chargeType() |
---|
| 1504 | && event[iPos].col() == state[PosOutgoing1[i]].col() |
---|
| 1505 | && event[iPos].acol() == state[PosOutgoing1[i]].acol() |
---|
| 1506 | && event[iPos].charge() == state[PosOutgoing1[i]].charge() ) |
---|
| 1507 | matchQN1 = true; |
---|
| 1508 | |
---|
| 1509 | // Check outgoing candidates |
---|
| 1510 | for(int i=0; i < int(PosOutgoing2.size()); ++i) |
---|
| 1511 | // Compare particle properties |
---|
| 1512 | if ( event[iPos].id() == state[PosOutgoing2[i]].id() |
---|
| 1513 | && event[iPos].colType() == state[PosOutgoing2[i]].colType() |
---|
| 1514 | && event[iPos].chargeType() == state[PosOutgoing2[i]].chargeType() |
---|
| 1515 | && event[iPos].col() == state[PosOutgoing2[i]].col() |
---|
| 1516 | && event[iPos].acol() == state[PosOutgoing2[i]].acol() |
---|
| 1517 | && event[iPos].charge() == state[PosOutgoing2[i]].charge() ) |
---|
| 1518 | matchQN2 = true; |
---|
| 1519 | |
---|
| 1520 | // Check if maps to hard process: |
---|
| 1521 | // Check that particle is in hard process |
---|
| 1522 | if ( event[iPos].mother1()*event[iPos].mother2() == 12 |
---|
| 1523 | // Or particle has taken recoil from first splitting |
---|
| 1524 | || ( event[iPos].status() == 44 |
---|
| 1525 | && event[event[iPos].mother1()].mother1() |
---|
| 1526 | *event[event[iPos].mother1()].mother2() == 12 ) |
---|
| 1527 | // Or particle has on-shell resonace as mother |
---|
| 1528 | || ( event[iPos].status() == 23 |
---|
| 1529 | && event[event[iPos].mother1()].mother1() |
---|
| 1530 | *event[event[iPos].mother1()].mother2() == 12 ) |
---|
| 1531 | // Or particle has on-shell resonace as mother, |
---|
| 1532 | // which again has and on-shell resonance as mother |
---|
| 1533 | || ( event[iPos].status() == 23 |
---|
| 1534 | && event[event[iPos].mother1()].status() == -22 |
---|
| 1535 | && event[event[event[iPos].mother1()].mother1()].status() == -22 |
---|
| 1536 | && event[event[event[iPos].mother1()].mother1()].mother1() |
---|
| 1537 | *event[event[event[iPos].mother1()].mother1()].mother2() == 12 ) ) |
---|
| 1538 | matchHP = true; |
---|
| 1539 | |
---|
| 1540 | // Done |
---|
| 1541 | return ( matchHP && (matchQN1 || matchQN2) ); |
---|
| 1542 | |
---|
| 1543 | } |
---|
| 1544 | |
---|
| 1545 | |
---|
| 1546 | //-------------------------------------------------------------------------- |
---|
| 1547 | |
---|
| 1548 | // Function to return the type of the ME generator |
---|
| 1549 | |
---|
| 1550 | int HardProcess::MEgenType(){ return meGenType;} |
---|
| 1551 | |
---|
| 1552 | //-------------------------------------------------------------------------- |
---|
| 1553 | |
---|
| 1554 | // Function to get the number of coloured final state partons in the |
---|
| 1555 | // hard process |
---|
| 1556 | |
---|
| 1557 | int HardProcess::nQuarksOut(){ |
---|
| 1558 | int nFin =0; |
---|
| 1559 | for(int i =0; i< int(hardOutgoing1.size()); ++i){ |
---|
| 1560 | if (hardOutgoing1[i] == 2212 || abs(hardOutgoing1[i]) < 10) nFin++; |
---|
| 1561 | } |
---|
| 1562 | for(int i =0; i< int(hardOutgoing2.size()); ++i){ |
---|
| 1563 | if (hardOutgoing2[i] == 2212 || abs(hardOutgoing2[i]) < 10) nFin++; |
---|
| 1564 | } |
---|
| 1565 | // For very loose hard process definition, check number of hard process |
---|
| 1566 | // b-quarks explicitly. |
---|
| 1567 | for(int i =0; i< int(hardOutgoing1.size()); ++i) |
---|
| 1568 | if (hardOutgoing1[i] == 5000) |
---|
| 1569 | for(int j =0; j< int(PosOutgoing1.size()); ++j) |
---|
| 1570 | if (state[PosOutgoing1[j]].idAbs() == 5) |
---|
| 1571 | nFin++; |
---|
| 1572 | for(int i =0; i< int(hardOutgoing2.size()); ++i) |
---|
| 1573 | if (hardOutgoing2[i] == 5000) |
---|
| 1574 | for(int j =0; j< int(PosOutgoing2.size()); ++j) |
---|
| 1575 | if (state[PosOutgoing2[j]].idAbs() == 5) |
---|
| 1576 | nFin++; |
---|
| 1577 | return nFin; |
---|
| 1578 | } |
---|
| 1579 | |
---|
| 1580 | //-------------------------------------------------------------------------- |
---|
| 1581 | |
---|
| 1582 | // Function to get the number of uncoloured final state particles in the |
---|
| 1583 | // hard process |
---|
| 1584 | |
---|
| 1585 | int HardProcess::nLeptonOut(){ |
---|
| 1586 | int nFin =0; |
---|
| 1587 | for(int i =0; i< int(hardOutgoing1.size()); ++i){ |
---|
| 1588 | if (abs(hardOutgoing1[i]) > 10 && abs(hardOutgoing1[i]) < 20) nFin++; |
---|
| 1589 | // Bookkeep MSSM neutralinos as leptons |
---|
| 1590 | if (abs(hardOutgoing1[i]) == 1000022) nFin++; |
---|
| 1591 | } |
---|
| 1592 | for(int i =0; i< int(hardOutgoing2.size()); ++i){ |
---|
| 1593 | if (abs(hardOutgoing2[i]) > 10 && abs(hardOutgoing2[i]) < 20) nFin++; |
---|
| 1594 | // Bookkeep MSSM neutralinos as leptons |
---|
| 1595 | if (abs(hardOutgoing2[i]) == 1000022) nFin++; |
---|
| 1596 | } |
---|
| 1597 | // For very loose hard process definition, check number of hard process |
---|
| 1598 | // lepton explicitly. |
---|
| 1599 | // Check lepton / neutrino containers as leptons |
---|
| 1600 | for(int i =0; i< int(hardOutgoing1.size()); ++i) |
---|
| 1601 | if (hardOutgoing1[i] == 1100) |
---|
| 1602 | for(int j =0; j< int(PosOutgoing1.size()); ++j) |
---|
| 1603 | if ( abs(state[PosOutgoing1[j]].id()) == 11 |
---|
| 1604 | || abs(state[PosOutgoing1[j]].id()) == 13 |
---|
| 1605 | || abs(state[PosOutgoing1[j]].id()) == 15 ) |
---|
| 1606 | nFin++; |
---|
| 1607 | for(int i =0; i< int(hardOutgoing2.size()); ++i) |
---|
| 1608 | if (hardOutgoing2[i] == 1200) |
---|
| 1609 | for(int j =0; j< int(PosOutgoing2.size()); ++j) |
---|
| 1610 | if ( abs(state[PosOutgoing2[j]].id()) == 12 |
---|
| 1611 | || abs(state[PosOutgoing2[j]].id()) == 14 |
---|
| 1612 | || abs(state[PosOutgoing2[j]].id()) == 16 ) |
---|
| 1613 | nFin++; |
---|
| 1614 | return nFin; |
---|
| 1615 | } |
---|
| 1616 | |
---|
| 1617 | //-------------------------------------------------------------------------- |
---|
| 1618 | |
---|
| 1619 | // Function to get the number of uncoloured final state particles in the |
---|
| 1620 | // hard process |
---|
| 1621 | |
---|
| 1622 | int HardProcess::nBosonsOut(){ |
---|
| 1623 | int nFin =0; |
---|
| 1624 | for(int i =0; i< int(hardOutgoing1.size()); ++i){ |
---|
| 1625 | if (abs(hardOutgoing1[i]) > 20 && abs(hardOutgoing1[i]) <= 25) nFin++; |
---|
| 1626 | } |
---|
| 1627 | for(int i =0; i< int(hardOutgoing2.size()); ++i){ |
---|
| 1628 | if (abs(hardOutgoing2[i]) > 20 && abs(hardOutgoing2[i]) <= 25) nFin++; |
---|
| 1629 | if ( hardOutgoing2[i] == 2400) nFin++; |
---|
| 1630 | } |
---|
| 1631 | return nFin; |
---|
| 1632 | } |
---|
| 1633 | |
---|
| 1634 | //-------------------------------------------------------------------------- |
---|
| 1635 | |
---|
| 1636 | // Function to get the number of coloured initial state partons in the |
---|
| 1637 | // hard process |
---|
| 1638 | |
---|
| 1639 | int HardProcess::nQuarksIn(){ |
---|
| 1640 | int nIn =0; |
---|
| 1641 | if (hardIncoming1 == 2212 || abs(hardIncoming1) < 10) nIn++; |
---|
| 1642 | if (hardIncoming2 == 2212 || abs(hardIncoming2) < 10) nIn++; |
---|
| 1643 | return nIn; |
---|
| 1644 | } |
---|
| 1645 | |
---|
| 1646 | //-------------------------------------------------------------------------- |
---|
| 1647 | |
---|
| 1648 | // Function to get the number of uncoloured initial state particles in the |
---|
| 1649 | // hard process |
---|
| 1650 | |
---|
| 1651 | int HardProcess::nLeptonIn(){ |
---|
| 1652 | int nIn =0; |
---|
| 1653 | if (abs(hardIncoming1) > 10 && abs(hardIncoming1) < 20) nIn++; |
---|
| 1654 | if (abs(hardIncoming2) > 10 && abs(hardIncoming2) < 20) nIn++; |
---|
| 1655 | return nIn; |
---|
| 1656 | } |
---|
| 1657 | |
---|
| 1658 | //-------------------------------------------------------------------------- |
---|
| 1659 | |
---|
| 1660 | // Function to report if a resonace decay was found in the |
---|
| 1661 | // 2->2 hard sub-process in the current state |
---|
| 1662 | |
---|
| 1663 | int HardProcess::hasResInCurrent(){ |
---|
| 1664 | for(int i =0; i< int(PosIntermediate.size()); ++i) |
---|
| 1665 | if (PosIntermediate[i] == 0) return 0; |
---|
| 1666 | // Do not count final state bosons as resonaces |
---|
| 1667 | for(int i =0; i< int(PosIntermediate.size()); ++i){ |
---|
| 1668 | for(int j =0; j< int(PosOutgoing1.size()); ++j){ |
---|
| 1669 | if ( PosIntermediate[i] == PosOutgoing1[j] ) |
---|
| 1670 | return 0; |
---|
| 1671 | } |
---|
| 1672 | for(int j =0; j< int(PosOutgoing2.size()); ++j){ |
---|
| 1673 | if ( PosIntermediate[i] == PosOutgoing2[j] ) |
---|
| 1674 | return 0; |
---|
| 1675 | } |
---|
| 1676 | } |
---|
| 1677 | return 1; |
---|
| 1678 | } |
---|
| 1679 | |
---|
| 1680 | //-------------------------------------------------------------------------- |
---|
| 1681 | |
---|
| 1682 | // Function to report the number of resonace decays in the 2->2 sub-process |
---|
| 1683 | // of the current state |
---|
| 1684 | |
---|
| 1685 | int HardProcess::nResInCurrent(){ |
---|
| 1686 | int nRes = 0; |
---|
| 1687 | for(int i =0; i< int(PosIntermediate.size()); ++i){ |
---|
| 1688 | if (PosIntermediate[i] != 0) { |
---|
| 1689 | bool matchesFinalBoson = false; |
---|
| 1690 | for(int j =0; j< int(PosOutgoing1.size()); ++j){ |
---|
| 1691 | if ( PosIntermediate[i] == PosOutgoing1[j] ) |
---|
| 1692 | matchesFinalBoson = true; |
---|
| 1693 | } |
---|
| 1694 | for(int j =0; j< int(PosOutgoing2.size()); ++j){ |
---|
| 1695 | if ( PosIntermediate[i] == PosOutgoing2[j] ) |
---|
| 1696 | matchesFinalBoson = true; |
---|
| 1697 | } |
---|
| 1698 | if (!matchesFinalBoson) nRes++; |
---|
| 1699 | } |
---|
| 1700 | } |
---|
| 1701 | return nRes; |
---|
| 1702 | } |
---|
| 1703 | |
---|
| 1704 | //-------------------------------------------------------------------------- |
---|
| 1705 | |
---|
| 1706 | // Function to report if a resonace decay was found in the |
---|
| 1707 | // 2->2 hard core process |
---|
| 1708 | |
---|
| 1709 | bool HardProcess::hasResInProc(){ |
---|
| 1710 | |
---|
| 1711 | for(int i =0; i< int(hardIntermediate.size()); ++i) |
---|
| 1712 | if (hardIntermediate[i] == 0) return false; |
---|
| 1713 | // Do not count final state bosons as resonaces |
---|
| 1714 | for(int i =0; i< int(hardIntermediate.size()); ++i){ |
---|
| 1715 | for(int j =0; j< int(hardOutgoing1.size()); ++j){ |
---|
| 1716 | if ( hardIntermediate[i] == hardOutgoing1[j] ) |
---|
| 1717 | return false; |
---|
| 1718 | } |
---|
| 1719 | for(int j =0; j< int(hardOutgoing2.size()); ++j){ |
---|
| 1720 | if ( hardIntermediate[i] == hardOutgoing2[j] ) |
---|
| 1721 | return false; |
---|
| 1722 | } |
---|
| 1723 | } |
---|
| 1724 | return true; |
---|
| 1725 | } |
---|
| 1726 | |
---|
| 1727 | //-------------------------------------------------------------------------- |
---|
| 1728 | |
---|
| 1729 | // Function to print the hard process (for debug) |
---|
| 1730 | |
---|
| 1731 | void HardProcess::list() const { |
---|
| 1732 | cout << " Hard Process: "; |
---|
| 1733 | cout << " \t " << hardIncoming1 << " + " << hardIncoming2; |
---|
| 1734 | cout << " \t -----> \t "; |
---|
| 1735 | for(int i =0; i < int(hardIntermediate.size());++i) |
---|
| 1736 | cout << hardIntermediate[i] << " "; |
---|
| 1737 | cout << " \t -----> \t "; |
---|
| 1738 | for(int i =0; i < int(hardOutgoing1.size());++i) |
---|
| 1739 | cout << hardOutgoing1[i] << " "; |
---|
| 1740 | for(int i =0; i < int(hardOutgoing2.size());++i) |
---|
| 1741 | cout << hardOutgoing2[i] << " "; |
---|
| 1742 | cout << endl; |
---|
| 1743 | } |
---|
| 1744 | |
---|
| 1745 | //-------------------------------------------------------------------------- |
---|
| 1746 | |
---|
| 1747 | // Function to list the hard process candiates in the matrix element state |
---|
| 1748 | // (for debug) |
---|
| 1749 | |
---|
| 1750 | void HardProcess::listCandidates() const { |
---|
| 1751 | cout << " Hard Process candidates: "; |
---|
| 1752 | cout << " \t " << hardIncoming1 << " + " << hardIncoming2; |
---|
| 1753 | cout << " \t -----> \t "; |
---|
| 1754 | for(int i =0; i < int(PosIntermediate.size());++i) |
---|
| 1755 | cout << PosIntermediate[i] << " "; |
---|
| 1756 | cout << " \t -----> \t "; |
---|
| 1757 | for(int i =0; i < int(PosOutgoing1.size());++i) |
---|
| 1758 | cout << PosOutgoing1[i] << " "; |
---|
| 1759 | for(int i =0; i < int(PosOutgoing2.size());++i) |
---|
| 1760 | cout << PosOutgoing2[i] << " "; |
---|
| 1761 | cout << endl; |
---|
| 1762 | } |
---|
| 1763 | |
---|
| 1764 | //-------------------------------------------------------------------------- |
---|
| 1765 | |
---|
| 1766 | // Function to clear hard process information |
---|
| 1767 | |
---|
| 1768 | void HardProcess::clear() { |
---|
| 1769 | |
---|
| 1770 | // Clear flavour of the first incoming particle |
---|
| 1771 | hardIncoming1 = hardIncoming2 = 0; |
---|
| 1772 | // Clear outgoing particles |
---|
| 1773 | hardOutgoing1.resize(0); |
---|
| 1774 | hardOutgoing2.resize(0); |
---|
| 1775 | // Clear intermediate bosons in the hard 2->2 |
---|
| 1776 | hardIntermediate.resize(0); |
---|
| 1777 | |
---|
| 1778 | // Clear reference event |
---|
| 1779 | state.clear(); |
---|
| 1780 | |
---|
| 1781 | // Clear potential positions of outgoing particles in reference event |
---|
| 1782 | PosOutgoing1.resize(0); |
---|
| 1783 | PosOutgoing2.resize(0); |
---|
| 1784 | // Clear potential positions of intermediate bosons in reference event |
---|
| 1785 | PosIntermediate.resize(0); |
---|
| 1786 | |
---|
| 1787 | // Clear merging scale read from LHE file |
---|
| 1788 | tms = 0.; |
---|
| 1789 | // Clear type of ME generator |
---|
| 1790 | meGenType = 0; |
---|
| 1791 | |
---|
| 1792 | |
---|
| 1793 | } |
---|
| 1794 | |
---|
| 1795 | //========================================================================== |
---|
| 1796 | |
---|
| 1797 | // The MergingHooks class. |
---|
| 1798 | |
---|
| 1799 | //-------------------------------------------------------------------------- |
---|
| 1800 | |
---|
| 1801 | // Initialise MergingHooks class |
---|
| 1802 | |
---|
| 1803 | void MergingHooks::init( Settings& settings, Info* infoPtrIn, |
---|
| 1804 | ParticleData* particleDataPtrIn, ostream& os){ |
---|
| 1805 | |
---|
| 1806 | // Save pointers |
---|
| 1807 | infoPtr = infoPtrIn; |
---|
| 1808 | particleDataPtr = particleDataPtrIn; |
---|
| 1809 | |
---|
| 1810 | // Initialise AlphaS objects for reweighting |
---|
| 1811 | double alphaSvalueFSR = settings.parm("TimeShower:alphaSvalue"); |
---|
| 1812 | int alphaSorderFSR = settings.mode("TimeShower:alphaSorder"); |
---|
| 1813 | AlphaS_FSRSave.init(alphaSvalueFSR,alphaSorderFSR); |
---|
| 1814 | double alphaSvalueISR = settings.parm("SpaceShower:alphaSvalue"); |
---|
| 1815 | int alphaSorderISR = settings.mode("SpaceShower:alphaSorder"); |
---|
| 1816 | AlphaS_ISRSave.init(alphaSvalueISR,alphaSorderISR); |
---|
| 1817 | |
---|
| 1818 | // Initialise AlphaS objects for reweighting |
---|
| 1819 | int alphaEMFSRorder = settings.mode("TimeShower:alphaEMorder"); |
---|
| 1820 | AlphaEM_FSRSave.init(alphaEMFSRorder, &settings); |
---|
| 1821 | |
---|
| 1822 | // Initialise merging switches |
---|
| 1823 | doUserMergingSave = settings.flag("Merging:doUserMerging"); |
---|
| 1824 | |
---|
| 1825 | // Initialise automated MadGraph kT merging |
---|
| 1826 | doMGMergingSave = settings.flag("Merging:doMGMerging"); |
---|
| 1827 | |
---|
| 1828 | // Initialise kT merging |
---|
| 1829 | doKTMergingSave = settings.flag("Merging:doKTMerging"); |
---|
| 1830 | |
---|
| 1831 | // Initialise evolution-pT merging |
---|
| 1832 | doPTLundMergingSave = settings.flag("Merging:doPTLundMerging"); |
---|
| 1833 | |
---|
| 1834 | // Initialise \Delta_R_{ij}, pT_i Q_{ij} merging |
---|
| 1835 | doCutBasedMergingSave = settings.flag("Merging:doCutBasedMerging"); |
---|
| 1836 | |
---|
| 1837 | // Initialise exact definition of kT |
---|
| 1838 | ktTypeSave = settings.mode("Merging:ktType"); |
---|
| 1839 | |
---|
| 1840 | // Get core process from user input |
---|
| 1841 | processSave = settings.word("Merging:Process"); |
---|
| 1842 | |
---|
| 1843 | // Clear hard process |
---|
| 1844 | hardProcess.clear(); |
---|
| 1845 | |
---|
| 1846 | bool doStandardMerging = doUserMergingSave || doKTMergingSave |
---|
| 1847 | || doPTLundMergingSave || doCutBasedMergingSave; |
---|
| 1848 | |
---|
| 1849 | // Initialise the hard process |
---|
| 1850 | if ( doStandardMerging ) |
---|
| 1851 | hardProcess.initOnProcess(processSave, particleDataPtr); |
---|
| 1852 | else |
---|
| 1853 | hardProcess.initOnLHEF(lheInputFile, particleDataPtr); |
---|
| 1854 | |
---|
| 1855 | // Parameters for reconstruction of evolution scales |
---|
| 1856 | includeMassiveSave = settings.flag("Merging:includeMassive"); |
---|
| 1857 | enforceStrongOrderingSave = settings.flag("Merging:enforceStrongOrdering"); |
---|
| 1858 | scaleSeparationFactorSave = settings.parm("Merging:scaleSeparationFactor"); |
---|
| 1859 | orderInRapiditySave = settings.flag("Merging:orderInRapidity"); |
---|
| 1860 | |
---|
| 1861 | // Parameters for choosing history probabilistically |
---|
| 1862 | nonJoinedNormSave = settings.parm("Merging:nonJoinedNorm"); |
---|
| 1863 | fsrInRecNormSave = settings.parm("Merging:fsrInRecNorm"); |
---|
| 1864 | pickByFullPSave = settings.flag("Merging:pickByFullP"); |
---|
| 1865 | pickByPoPT2Save = settings.flag("Merging:pickByPoPT2"); |
---|
| 1866 | includeRedundantSave = settings.flag("Merging:includeRedundant"); |
---|
| 1867 | |
---|
| 1868 | // Parameters for scale choices |
---|
| 1869 | unorderedScalePrescipSave = |
---|
| 1870 | settings.mode("Merging:unorderedScalePrescrip"); |
---|
| 1871 | unorderedASscalePrescipSave = |
---|
| 1872 | settings.mode("Merging:unorderedASscalePrescrip"); |
---|
| 1873 | unorderedPDFscalePrescipSave = |
---|
| 1874 | settings.mode("Merging:unorderedPDFscalePrescrip"); |
---|
| 1875 | incompleteScalePrescipSave = |
---|
| 1876 | settings.mode("Merging:incompleteScalePrescrip"); |
---|
| 1877 | |
---|
| 1878 | // Parameter for allowing swapping of one colour index while reclustering |
---|
| 1879 | allowColourShufflingSave = |
---|
| 1880 | settings.flag("Merging:allowColourShuffling"); |
---|
| 1881 | |
---|
| 1882 | // Parameters to allow setting hard process scales to default (dynamical) |
---|
| 1883 | // Pythia values. |
---|
| 1884 | resetHardQRenSave = settings.flag("Merging:usePythiaQRenHard"); |
---|
| 1885 | resetHardQFacSave = settings.flag("Merging:usePythiaQFacHard"); |
---|
| 1886 | |
---|
| 1887 | // Parameters for choosing history by sum(|pT|) |
---|
| 1888 | pickBySumPTSave = settings.flag("Merging:pickBySumPT"); |
---|
| 1889 | herwigAcollFSRSave = settings.parm("Merging:aCollFSR"); |
---|
| 1890 | herwigAcollISRSave = settings.parm("Merging:aCollISR"); |
---|
| 1891 | |
---|
| 1892 | // Information on the shower cut-off scale |
---|
| 1893 | pT0ISRSave = settings.parm("SpaceShower:pT0Ref"); |
---|
| 1894 | pTcutSave = settings.parm("SpaceShower:pTmin"); |
---|
| 1895 | pTcutSave = max(pTcutSave,pT0ISRSave); |
---|
| 1896 | |
---|
| 1897 | // Initialise CKKWL weight |
---|
| 1898 | weightSave = 1.; |
---|
| 1899 | weightCKKWLSave = 1.; |
---|
| 1900 | |
---|
| 1901 | // Initialise merging scale |
---|
| 1902 | tmsValueSave = 0.; |
---|
| 1903 | tmsListSave.resize(0); |
---|
| 1904 | |
---|
| 1905 | // Save merging scale on maximal number of jets |
---|
| 1906 | if ( doKTMergingSave || doUserMergingSave || doPTLundMergingSave ) { |
---|
| 1907 | // Read merging scale (defined in kT) from input parameter. |
---|
| 1908 | tmsValueSave = settings.parm("Merging:TMS"); |
---|
| 1909 | nJetMaxSave = settings.mode("Merging:nJetMax"); |
---|
| 1910 | } else if (doMGMergingSave) { |
---|
| 1911 | // Read merging scale (defined in kT) from LHE file. |
---|
| 1912 | tmsValueSave = hardProcess.tms; |
---|
| 1913 | nJetMaxSave = settings.mode("Merging:nJetMax"); |
---|
| 1914 | } else if (doCutBasedMergingSave) { |
---|
| 1915 | // Save list of cuts defining the merging scale. |
---|
| 1916 | nJetMaxSave = settings.mode("Merging:nJetMax"); |
---|
| 1917 | // Write tms cut values to list of cut values, |
---|
| 1918 | // ordered by DeltaR_{ij}, pT_{i}, Q_{ij}. |
---|
| 1919 | tmsListSave.resize(0); |
---|
| 1920 | double drms = settings.parm("Merging:dRijMS"); |
---|
| 1921 | double ptms = settings.parm("Merging:pTiMS"); |
---|
| 1922 | double qms = settings.parm("Merging:QijMS"); |
---|
| 1923 | tmsListSave.push_back(drms); |
---|
| 1924 | tmsListSave.push_back(ptms); |
---|
| 1925 | tmsListSave.push_back(qms); |
---|
| 1926 | } |
---|
| 1927 | |
---|
| 1928 | bool writeBanner = doKTMergingSave || doMGMergingSave || doUserMergingSave |
---|
| 1929 | || doPTLundMergingSave || doCutBasedMergingSave; |
---|
| 1930 | |
---|
| 1931 | if (!writeBanner) return; |
---|
| 1932 | |
---|
| 1933 | // Write banner |
---|
| 1934 | os << "\n" |
---|
| 1935 | << " *---------- MEPS Merging Initialization -----------------------*" |
---|
| 1936 | << "\n"; |
---|
| 1937 | if ( doKTMergingSave || doMGMergingSave || doUserMergingSave |
---|
| 1938 | || doPTLundMergingSave || doCutBasedMergingSave ) |
---|
| 1939 | os << " | CKKW-L tree-level merging:\n" |
---|
| 1940 | << " | We merge " << processSave << " with up to " << nJetMaxSave |
---|
| 1941 | << " additional jets \n"; |
---|
| 1942 | if ( doKTMergingSave ) |
---|
| 1943 | os << " | Merging scale is defined in kT with the value ktMS = " |
---|
| 1944 | << tmsValueSave << " GeV"; |
---|
| 1945 | else if ( doMGMergingSave ) |
---|
| 1946 | os << " | Perform automanted MG/ME merging \n" |
---|
| 1947 | << " | Merging scale is defined in kT with the value ktMS = " |
---|
| 1948 | << tmsValueSave << " GeV"; |
---|
| 1949 | else if ( doUserMergingSave ) |
---|
| 1950 | os << " | Merging scale is defined by the user, with the value tMS = " |
---|
| 1951 | << tmsValueSave; |
---|
| 1952 | else if ( doPTLundMergingSave ) |
---|
| 1953 | os << " | Merging scale is defined by Lund pT, with the value tMS = " |
---|
| 1954 | << tmsValueSave; |
---|
| 1955 | else if ( doCutBasedMergingSave ) |
---|
| 1956 | os << " | Merging scale is defined by combination of Delta R_{ij}, pT_i\n" |
---|
| 1957 | << " | and Q_{ij} cut, with values \n" |
---|
| 1958 | << " | Delta R_{ij,min} = " << tmsListSave[0] << "\n" |
---|
| 1959 | << " | pT_{i,min} = " << tmsListSave[1] << "\n" |
---|
| 1960 | << " | Q_{ij,min} = " << tmsListSave[2]; |
---|
| 1961 | os << "\n *---------- END MEPS Merging Initialization -------------------*" |
---|
| 1962 | << "\n\n"; |
---|
| 1963 | |
---|
| 1964 | } |
---|
| 1965 | |
---|
| 1966 | //-------------------------------------------------------------------------- |
---|
| 1967 | |
---|
| 1968 | // Function to return the number of clustering steps for the current event |
---|
| 1969 | |
---|
| 1970 | int MergingHooks::getNumberOfClusteringSteps(const Event& event){ |
---|
| 1971 | |
---|
| 1972 | // Count the number of final state partons |
---|
| 1973 | int nFinalPartons = 0; |
---|
| 1974 | for( int i=0; i < event.size(); ++i) |
---|
| 1975 | if ( event[i].isFinal() && (event[i].isQuark() || event[i].isGluon()) ) |
---|
| 1976 | nFinalPartons++; |
---|
| 1977 | |
---|
| 1978 | // Count the number of final state leptons |
---|
| 1979 | int nFinalLeptons = 0; |
---|
| 1980 | for( int i=0; i < event.size(); ++i) |
---|
| 1981 | if ( event[i].isFinal() && event[i].isLepton()) |
---|
| 1982 | nFinalLeptons++; |
---|
| 1983 | |
---|
| 1984 | // Add neutralinos to number of leptons |
---|
| 1985 | for( int i=0; i < event.size(); ++i) |
---|
| 1986 | if ( event[i].isFinal() |
---|
| 1987 | && event[i].idAbs() == 1000022) |
---|
| 1988 | nFinalLeptons++; |
---|
| 1989 | |
---|
| 1990 | // Count the number of final state electroweak bosons |
---|
| 1991 | int nFinalBosons = 0; |
---|
| 1992 | for( int i=0; i < event.size(); ++i) |
---|
| 1993 | if ( event[i].isFinal() |
---|
| 1994 | && ( event[i].idAbs() == 22 |
---|
| 1995 | || event[i].idAbs() == 23 |
---|
| 1996 | || event[i].idAbs() == 24 |
---|
| 1997 | || event[i].idAbs() == 25 ) ) |
---|
| 1998 | nFinalBosons++; |
---|
| 1999 | |
---|
| 2000 | // Save sum of all final state particles |
---|
| 2001 | int nFinal = nFinalPartons + nFinalLeptons |
---|
| 2002 | + 2*(nFinalBosons - nHardOutBosons() ); |
---|
| 2003 | |
---|
| 2004 | // Return the difference to the core process outgoing particles |
---|
| 2005 | return (nFinal - nHardOutPartons() - nHardOutLeptons() ); |
---|
| 2006 | } |
---|
| 2007 | |
---|
| 2008 | //-------------------------------------------------------------------------- |
---|
| 2009 | |
---|
| 2010 | // Function to check if event contains an emission not present in the hard |
---|
| 2011 | // process. |
---|
| 2012 | |
---|
| 2013 | bool MergingHooks::isFirstEmission(const Event& event ) { |
---|
| 2014 | |
---|
| 2015 | // Check that only one additional parton has been produced. |
---|
| 2016 | // If not, we're already in the PS region (e.g. in MI). |
---|
| 2017 | // Then, do not veto. |
---|
| 2018 | int nMPI = infoPtr->nMPI(); |
---|
| 2019 | if (nMPI > 1) return false; |
---|
| 2020 | |
---|
| 2021 | // Count particle types |
---|
| 2022 | int nFinalQuarks = 0; |
---|
| 2023 | int nFinalGluons = 0; |
---|
| 2024 | int nFinalLeptons = 0; |
---|
| 2025 | int nFinalBosons = 0; |
---|
| 2026 | int nFinalPhotons = 0; |
---|
| 2027 | int nFinal = 0; |
---|
| 2028 | for( int i=0; i < event.size(); ++i) { |
---|
| 2029 | if (event[i].isFinal()){ |
---|
| 2030 | if ( event[i].id() != 21 |
---|
| 2031 | && event[i].id() != 22 |
---|
| 2032 | && event[i].id() != 23 |
---|
| 2033 | && event[i].idAbs() != 24 |
---|
| 2034 | && event[i].id() != 25 |
---|
| 2035 | && event[i].colType() == 0) |
---|
| 2036 | nFinalLeptons++; |
---|
| 2037 | if ( event[i].id() == 23 |
---|
| 2038 | || event[i].idAbs() == 24 |
---|
| 2039 | || event[i].id() == 25) |
---|
| 2040 | nFinalBosons++; |
---|
| 2041 | if ( event[i].id() == 22) |
---|
| 2042 | nFinalPhotons++; |
---|
| 2043 | if ( event[i].isQuark()) |
---|
| 2044 | nFinalQuarks++; |
---|
| 2045 | if ( event[i].isGluon()) |
---|
| 2046 | nFinalGluons++; |
---|
| 2047 | if ( !event[i].isDiquark() ) |
---|
| 2048 | nFinal++; |
---|
| 2049 | } |
---|
| 2050 | } |
---|
| 2051 | |
---|
| 2052 | // Return highest value if the event does not contain any final state |
---|
| 2053 | // coloured particles. |
---|
| 2054 | if (nFinalQuarks + nFinalGluons == 0) return false; |
---|
| 2055 | |
---|
| 2056 | // Use MergingHooks functions to get information on the hard process. |
---|
| 2057 | int nLeptons = nHardOutLeptons(); |
---|
| 2058 | |
---|
| 2059 | // The state is already in the PS region if the number of leptons had been |
---|
| 2060 | // increased bt QED splittings. |
---|
| 2061 | if (nFinalLeptons > nLeptons) return false; |
---|
| 2062 | |
---|
| 2063 | // If the mumber of photons if larger than in the hard process, QED |
---|
| 2064 | // radiation has pushed the state into the PS region. |
---|
| 2065 | int nPhotons = 0; |
---|
| 2066 | for(int i =0; i< int(hardProcess.hardOutgoing1.size()); ++i) |
---|
| 2067 | if (hardProcess.hardOutgoing1[i] == 22) |
---|
| 2068 | nPhotons++; |
---|
| 2069 | for(int i =0; i< int(hardProcess.hardOutgoing2.size()); ++i) |
---|
| 2070 | if (hardProcess.hardOutgoing2[i] == 22) |
---|
| 2071 | nPhotons++; |
---|
| 2072 | if (nFinalPhotons > nPhotons) return false; |
---|
| 2073 | |
---|
| 2074 | // Done |
---|
| 2075 | return true; |
---|
| 2076 | } |
---|
| 2077 | |
---|
| 2078 | //-------------------------------------------------------------------------- |
---|
| 2079 | |
---|
| 2080 | // Function to return the minimal kT in the event. If doKTMerging = true, this |
---|
| 2081 | // function will be used as a merging scale definition. |
---|
| 2082 | |
---|
| 2083 | double MergingHooks::kTms(const Event& event) { |
---|
| 2084 | |
---|
| 2085 | // Only check first emission. |
---|
| 2086 | if (!isFirstEmission(event)) return 0.; |
---|
| 2087 | |
---|
| 2088 | // Find all electroweak decayed bosons in the state. |
---|
| 2089 | vector<int> ewResonancePos; |
---|
| 2090 | ewResonancePos.clear(); |
---|
| 2091 | for (int i=0; i < event.size(); ++i) |
---|
| 2092 | if ( abs(event[i].status()) == 22 ) |
---|
| 2093 | ewResonancePos.push_back(i); |
---|
| 2094 | |
---|
| 2095 | // Declare final parton vectors |
---|
| 2096 | vector <int> FinalPartPos; |
---|
| 2097 | FinalPartPos.clear(); |
---|
| 2098 | // Search inEvent record for final state partons. |
---|
| 2099 | // Exclude decay products of ew resonance. |
---|
| 2100 | for (int i=0; i < event.size(); ++i){ |
---|
| 2101 | if ( event[i].isFinal() |
---|
| 2102 | && event[i].colType() != 0 |
---|
| 2103 | && event[i].idAbs() != 6 ){ |
---|
| 2104 | bool isDecayProduct = false; |
---|
| 2105 | for(int j=0; j < int(ewResonancePos.size()); ++j) |
---|
| 2106 | if ( event.isAncestor(i, ewResonancePos[j]) |
---|
| 2107 | && event[i].mother2() == 0 ) |
---|
| 2108 | isDecayProduct = true; |
---|
| 2109 | // Except for e+e- -> jets, do not check radiation in resonance decays. |
---|
| 2110 | if ( !isDecayProduct |
---|
| 2111 | || getProcessString().compare("e+e->jj") == 0 |
---|
| 2112 | || getProcessString().compare("e+e->(z>jj)") == 0 ) |
---|
| 2113 | FinalPartPos.push_back(i); |
---|
| 2114 | } |
---|
| 2115 | } |
---|
| 2116 | |
---|
| 2117 | // Declare kT algorithm parameters |
---|
| 2118 | double Dparam = 0.4; |
---|
| 2119 | |
---|
| 2120 | // Find minimal Durham kT in event, using own function: Check |
---|
| 2121 | // definition of separation |
---|
| 2122 | int type = (event[3].colType() == 0 |
---|
| 2123 | && event[4].colType() == 0) ? -1 : ktTypeSave; |
---|
| 2124 | // Find minimal kT |
---|
| 2125 | double ktmin = event[0].e(); |
---|
| 2126 | for(int i=0; i < int(FinalPartPos.size()); ++i){ |
---|
| 2127 | double kt12 = ktmin; |
---|
| 2128 | // Compute separation to the beam axis for hadronic collisions |
---|
| 2129 | if (type == 1 || type == 2) { |
---|
| 2130 | double temp = event[FinalPartPos[i]].pT(); |
---|
| 2131 | kt12 = min(kt12, temp); |
---|
| 2132 | } |
---|
| 2133 | // Compute separation to other final state jets |
---|
| 2134 | for(int j=i+1; j < int(FinalPartPos.size()); ++j) { |
---|
| 2135 | double temp = kTdurham( event[FinalPartPos[i]], event[FinalPartPos[j]], |
---|
| 2136 | type, Dparam); |
---|
| 2137 | kt12 = min(kt12, temp); |
---|
| 2138 | } |
---|
| 2139 | // Keep the minimal Durham separation |
---|
| 2140 | ktmin = min(ktmin,kt12); |
---|
| 2141 | } |
---|
| 2142 | |
---|
| 2143 | // Return minimal Durham kT |
---|
| 2144 | return ktmin; |
---|
| 2145 | |
---|
| 2146 | } |
---|
| 2147 | |
---|
| 2148 | //-------------------------------------------------------------------------- |
---|
| 2149 | |
---|
| 2150 | // Function to compute durham y separation from Particle input. |
---|
| 2151 | |
---|
| 2152 | double MergingHooks::kTdurham(const Particle& RadAfterBranch, |
---|
| 2153 | const Particle& EmtAfterBranch, int Type, double D ){ |
---|
| 2154 | |
---|
| 2155 | // Declare return variable |
---|
| 2156 | double ktdur; |
---|
| 2157 | // Save 4-momenta of final state particles |
---|
| 2158 | Vec4 jet1 = RadAfterBranch.p(); |
---|
| 2159 | Vec4 jet2 = EmtAfterBranch.p(); |
---|
| 2160 | |
---|
| 2161 | if ( Type == -1) { |
---|
| 2162 | // Get angle between jets for e+e- collisions, make sure that |
---|
| 2163 | // -1 <= cos(theta) <= 1 |
---|
| 2164 | double costh; |
---|
| 2165 | if (jet1.pAbs()*jet2.pAbs() <=0.) costh = 1.; |
---|
| 2166 | else { |
---|
| 2167 | costh = costheta(jet1,jet2); |
---|
| 2168 | } |
---|
| 2169 | // Calculate kt durham separation between jets for e+e- collisions |
---|
| 2170 | ktdur = 2.0*min( pow(jet1.e(),2) , (pow(jet2.e(),2)) )*(1.0 - costh); |
---|
| 2171 | } else if ( Type == 1 ){ |
---|
| 2172 | // Get delta_y for hadronic collisions: |
---|
| 2173 | // Get mT of first jet |
---|
| 2174 | double mT1sq = jet1.m2Calc() + jet1.pT2(); |
---|
| 2175 | double mT1 = 0.; |
---|
| 2176 | if (mT1sq < 0) mT1 = - sqrt(-mT1sq); |
---|
| 2177 | else mT1 = sqrt(mT1sq); |
---|
| 2178 | // Get mT of second jet |
---|
| 2179 | double mT2sq = jet2.m2Calc() + jet2.pT2(); |
---|
| 2180 | double mT2 = 0.; |
---|
| 2181 | if (mT2sq < 0) mT2 = - sqrt(-mT2sq); |
---|
| 2182 | else mT2 = sqrt(mT2sq); |
---|
| 2183 | // Get rapidity of first jet |
---|
| 2184 | double y1 = log( ( jet1.e() + abs(jet1.pz()) ) / mT1 ); |
---|
| 2185 | if (jet1.pz() < 0) y1 *= -1.; |
---|
| 2186 | // Get rapidity of second jet |
---|
| 2187 | double y2 = log( ( jet2.e() + abs(jet2.pz()) ) / mT2 ); |
---|
| 2188 | if (jet2.pz() < 0) y2 *= -1.; |
---|
| 2189 | // Get delta_phi for hadronic collisions |
---|
| 2190 | double pt1 = sqrt( pow(jet1.px(),2) + pow(jet1.py(),2) ); |
---|
| 2191 | double pt2 = sqrt( pow(jet2.px(),2) + pow(jet2.py(),2) ); |
---|
| 2192 | double cosdPhi = ( jet1.px()*jet2.px() + jet1.py()*jet2.py() ) / (pt1*pt2); |
---|
| 2193 | double dPhi = acos( cosdPhi ); |
---|
| 2194 | // Calculate kT durham like fastjet, |
---|
| 2195 | // but with rapidity instead of pseudo-rapidity |
---|
| 2196 | ktdur = min( pow(pt1,2),pow(pt2,2) ) |
---|
| 2197 | * ( pow(y1-y2,2) + pow(dPhi,2) ) / pow(D,2); |
---|
| 2198 | } else if ( Type == 2 ){ |
---|
| 2199 | // Get delta_eta for hadronic collisions |
---|
| 2200 | double eta1 = 0.5*log( (jet1.e() + jet1.pz()) / (jet1.e() - jet1.pz()) ); |
---|
| 2201 | double eta2 = 0.5*log( (jet2.e() + jet2.pz()) / (jet2.e() - jet2.pz()) ); |
---|
| 2202 | // Get delta_phi and cos(Delta_phi) for hadronic collisions |
---|
| 2203 | double pt1 = sqrt( pow(jet1.px(),2) + pow(jet1.py(),2) ); |
---|
| 2204 | double pt2 = sqrt( pow(jet2.px(),2) + pow(jet2.py(),2) ); |
---|
| 2205 | double cosdPhi = ( jet1.px()*jet2.px() + jet1.py()*jet2.py() ) / (pt1*pt2); |
---|
| 2206 | double dPhi = acos( cosdPhi ); |
---|
| 2207 | // Calculate kT durham like fastjet |
---|
| 2208 | ktdur = min( pow(pt1,2),pow(pt2,2) ) |
---|
| 2209 | * ( pow(eta1-eta2,2) + pow(dPhi,2) ) / pow(D,2); |
---|
| 2210 | } else if ( Type == 3 ){ |
---|
| 2211 | // Get cosh(Delta_eta) for hadronic collisions |
---|
| 2212 | double eta1 = 0.5*log( (jet1.e() + jet1.pz()) / (jet1.e() - jet1.pz()) ); |
---|
| 2213 | double eta2 = 0.5*log( (jet2.e() + jet2.pz()) / (jet2.e() - jet2.pz()) ); |
---|
| 2214 | double coshdEta = cosh( eta1 - eta2 ); |
---|
| 2215 | // Get delta_phi and cos(Delta_phi) for hadronic collisions |
---|
| 2216 | double pt1 = sqrt( pow(jet1.px(),2) + pow(jet1.py(),2) ); |
---|
| 2217 | double pt2 = sqrt( pow(jet2.px(),2) + pow(jet2.py(),2) ); |
---|
| 2218 | double cosdPhi = ( jet1.px()*jet2.px() + jet1.py()*jet2.py() ) / (pt1*pt2); |
---|
| 2219 | // Calculate kT durham separation "SHERPA-like" |
---|
| 2220 | ktdur = 2.0*min( pow(pt1,2),pow(pt2,2) ) |
---|
| 2221 | * ( coshdEta - cosdPhi ) / pow(D,2); |
---|
| 2222 | } else { |
---|
| 2223 | ktdur = 0.0; |
---|
| 2224 | } |
---|
| 2225 | // Return kT |
---|
| 2226 | return sqrt(ktdur); |
---|
| 2227 | } |
---|
| 2228 | |
---|
| 2229 | //-------------------------------------------------------------------------- |
---|
| 2230 | |
---|
| 2231 | // Find the minimal Lund pT between coloured partons in the input |
---|
| 2232 | // event. If doPTLundMerging = true, this function will be used as a merging |
---|
| 2233 | // scale definition. |
---|
| 2234 | |
---|
| 2235 | double MergingHooks::rhoms( const Event& event, bool withColour){ |
---|
| 2236 | |
---|
| 2237 | // Only check first emission. |
---|
| 2238 | if (!isFirstEmission(event)) return 0.; |
---|
| 2239 | |
---|
| 2240 | // Find all electroweak decayed bosons in the state. |
---|
| 2241 | vector<int> ewResonancePos; |
---|
| 2242 | ewResonancePos.clear(); |
---|
| 2243 | for (int i=0; i < event.size(); ++i) |
---|
| 2244 | if ( abs(event[i].status()) == 22 ) |
---|
| 2245 | ewResonancePos.push_back(i); |
---|
| 2246 | |
---|
| 2247 | // Declare final parton vectors |
---|
| 2248 | vector <int> FinalPartPos; |
---|
| 2249 | FinalPartPos.clear(); |
---|
| 2250 | // Search inEvent record for final state partons. |
---|
| 2251 | // Exclude decay products of ew resonance. |
---|
| 2252 | for (int i=0; i < event.size(); ++i){ |
---|
| 2253 | if ( event[i].isFinal() |
---|
| 2254 | && event[i].colType() != 0 |
---|
| 2255 | && event[i].idAbs() != 6 ){ |
---|
| 2256 | bool isDecayProduct = false; |
---|
| 2257 | for(int j=0; j < int(ewResonancePos.size()); ++j) |
---|
| 2258 | if ( event.isAncestor(i, ewResonancePos[j]) |
---|
| 2259 | && event[i].mother2() == 0 ) |
---|
| 2260 | isDecayProduct = true; |
---|
| 2261 | // Except for e+e- -> jets, do not check radiation in resonance decays. |
---|
| 2262 | if ( !isDecayProduct |
---|
| 2263 | || getProcessString().compare("e+e->jj") == 0 |
---|
| 2264 | || getProcessString().compare("e+e->(z>jj)") == 0 ) |
---|
| 2265 | FinalPartPos.push_back(i); |
---|
| 2266 | } |
---|
| 2267 | } |
---|
| 2268 | |
---|
| 2269 | // Get index of first incoming |
---|
| 2270 | int in1 = 0; |
---|
| 2271 | for (int i=0; i < event.size(); ++i) |
---|
| 2272 | if (abs(event[i].status()) == 41 ){ |
---|
| 2273 | in1 = i; |
---|
| 2274 | break; |
---|
| 2275 | } |
---|
| 2276 | |
---|
| 2277 | // Get index of second incoming |
---|
| 2278 | int in2 = 0; |
---|
| 2279 | for (int i=0; i < event.size(); ++i) |
---|
| 2280 | if (abs(event[i].status()) == 42 ){ |
---|
| 2281 | in2 = i; |
---|
| 2282 | break; |
---|
| 2283 | } |
---|
| 2284 | |
---|
| 2285 | // If no incoming of the cascade are found, try incoming |
---|
| 2286 | if (in1 == 0 || in2 == 0){ |
---|
| 2287 | // Find current incoming partons |
---|
| 2288 | for(int i=0; i < int(event.size()); ++i){ |
---|
| 2289 | if (event[i].mother1() == 1) in1 = i; |
---|
| 2290 | if (event[i].mother1() == 2) in2 = i; |
---|
| 2291 | } |
---|
| 2292 | } |
---|
| 2293 | |
---|
| 2294 | // Find minimal pythia pt in event |
---|
| 2295 | double ptmin = event[0].e(); |
---|
| 2296 | for(int i=0; i < int(FinalPartPos.size()); ++i){ |
---|
| 2297 | double pt12 = ptmin; |
---|
| 2298 | // Compute pythia ISR separation i-jet and first incoming |
---|
| 2299 | if (event[in1].colType() != 0) { |
---|
| 2300 | double temp = rhoPythia( event[in1], |
---|
| 2301 | event[FinalPartPos[i]], event[in2], -1 ); |
---|
| 2302 | pt12 = min(pt12, temp); |
---|
| 2303 | } |
---|
| 2304 | // Compute pythia ISR separation i-jet and second incoming |
---|
| 2305 | if ( event[in2].colType() != 0) { |
---|
| 2306 | double temp = rhoPythia( event[in2], |
---|
| 2307 | event[FinalPartPos[i]], event[in1], -1 ); |
---|
| 2308 | pt12 = min(pt12, temp); |
---|
| 2309 | } |
---|
| 2310 | |
---|
| 2311 | if (withColour) { |
---|
| 2312 | // Compute pythia FSR separation between two jets, |
---|
| 2313 | // with knowledge of colour connections |
---|
| 2314 | for(int j=0; j < int(FinalPartPos.size()); ++j) { |
---|
| 2315 | |
---|
| 2316 | // Find recoiler in event |
---|
| 2317 | if ( i!=j ){ |
---|
| 2318 | bool isHard = false; |
---|
| 2319 | int radAcl = event[FinalPartPos[i]].acol(); |
---|
| 2320 | int radCol = event[FinalPartPos[i]].col(); |
---|
| 2321 | int emtAcl = event[FinalPartPos[j]].acol(); |
---|
| 2322 | int emtCol = event[FinalPartPos[j]].col(); |
---|
| 2323 | int iRec = -1; |
---|
| 2324 | // Check in final state |
---|
| 2325 | if (iRec <= 0 && radAcl > 0 && radAcl != emtCol) |
---|
| 2326 | iRec = findColour(radAcl, FinalPartPos[i], FinalPartPos[j], |
---|
| 2327 | event,1, isHard); |
---|
| 2328 | if (iRec <= 0 && radCol > 0 && radCol != emtAcl) |
---|
| 2329 | iRec = findColour(radCol, FinalPartPos[i], FinalPartPos[j], |
---|
| 2330 | event,1, isHard); |
---|
| 2331 | if (iRec <= 0 && emtAcl > 0 && emtAcl != radCol) |
---|
| 2332 | iRec = findColour(emtAcl, FinalPartPos[i], FinalPartPos[j], |
---|
| 2333 | event,1, isHard); |
---|
| 2334 | if (iRec <= 0 && emtCol > 0 && emtCol != radAcl) |
---|
| 2335 | iRec = findColour(emtCol, FinalPartPos[i], FinalPartPos[j], |
---|
| 2336 | event,1, isHard); |
---|
| 2337 | |
---|
| 2338 | // Check in initial state |
---|
| 2339 | if (iRec <= 0 && radAcl > 0 && radAcl != emtCol) |
---|
| 2340 | iRec = findColour(radAcl, FinalPartPos[i], FinalPartPos[j], |
---|
| 2341 | event,2, isHard); |
---|
| 2342 | if (iRec <= 0 && radCol > 0 && radCol != emtAcl) |
---|
| 2343 | iRec = findColour(radCol, FinalPartPos[i], FinalPartPos[j], |
---|
| 2344 | event,2, isHard); |
---|
| 2345 | if (iRec <= 0 && emtAcl > 0 && emtAcl != radCol) |
---|
| 2346 | iRec = findColour(emtAcl, FinalPartPos[i], FinalPartPos[j], |
---|
| 2347 | event,2, isHard); |
---|
| 2348 | if (iRec <= 0 && emtCol > 0 && emtCol != radAcl) |
---|
| 2349 | iRec = findColour(emtCol, FinalPartPos[i], FinalPartPos[j], |
---|
| 2350 | event,2, isHard); |
---|
| 2351 | |
---|
| 2352 | if (iRec > 0) { |
---|
| 2353 | double temp = rhoPythia( event[FinalPartPos[i]], |
---|
| 2354 | event[FinalPartPos[j]], |
---|
| 2355 | event[iRec], 1 ); |
---|
| 2356 | pt12 = min(pt12, temp); |
---|
| 2357 | } |
---|
| 2358 | } |
---|
| 2359 | |
---|
| 2360 | // If minimal pT below shower cut-off, return |
---|
| 2361 | if (pt12 < 0.4) return pt12; |
---|
| 2362 | |
---|
| 2363 | } |
---|
| 2364 | |
---|
| 2365 | } else { |
---|
| 2366 | // Compute pythia FSR separation between two jets, |
---|
| 2367 | // without any knowledge of colour connections |
---|
| 2368 | for(int j=0; j < int(FinalPartPos.size()); ++j) { |
---|
| 2369 | for(int k=0; k < int(FinalPartPos.size()); ++k) { |
---|
| 2370 | // Allow any parton as recoiler |
---|
| 2371 | if ( (i != j) && (i != k) && (j != k) ){ |
---|
| 2372 | |
---|
| 2373 | double temp = 0.; |
---|
| 2374 | // Only check splittings allowed by flavour, e.g. |
---|
| 2375 | // only q -> qg and g -> qqbar |
---|
| 2376 | temp = rhoPythia( event[FinalPartPos[i]], |
---|
| 2377 | event[FinalPartPos[j]], |
---|
| 2378 | event[FinalPartPos[k]], 1 ); |
---|
| 2379 | pt12 = min(pt12, temp); |
---|
| 2380 | } |
---|
| 2381 | } |
---|
| 2382 | // If minimal pT below shower cut-off, return |
---|
| 2383 | if (pt12 < 0.4) return pt12; |
---|
| 2384 | } |
---|
| 2385 | |
---|
| 2386 | // Compute pythia FSR separation between two jets, with initial recoiler |
---|
| 2387 | // without any knowledge of colour connections |
---|
| 2388 | if ( event[in1].colType() != 0 && event[in2].colType() != 0) { |
---|
| 2389 | for(int j=0; j < int(FinalPartPos.size()); ++j) { |
---|
| 2390 | // Allow both initial partons as recoiler |
---|
| 2391 | if ( i != j ){ |
---|
| 2392 | // Check with first initial as recoiler |
---|
| 2393 | double temp = rhoPythia( event[FinalPartPos[i]], |
---|
| 2394 | event[FinalPartPos[j]], |
---|
| 2395 | event[in1], 1 ); |
---|
| 2396 | pt12 = min(pt12, temp); |
---|
| 2397 | // Check with second initial as recoiler |
---|
| 2398 | temp = rhoPythia( event[FinalPartPos[i]], |
---|
| 2399 | event[FinalPartPos[j]], |
---|
| 2400 | event[in2], 1 ); |
---|
| 2401 | pt12 = min(pt12, temp); |
---|
| 2402 | } |
---|
| 2403 | |
---|
| 2404 | // If minimal pT below shower cut-off, return |
---|
| 2405 | if (pt12 < 0.4) return pt12; |
---|
| 2406 | } |
---|
| 2407 | } |
---|
| 2408 | |
---|
| 2409 | } |
---|
| 2410 | // Reset minimal y separation |
---|
| 2411 | ptmin = min(ptmin,pt12); |
---|
| 2412 | } |
---|
| 2413 | |
---|
| 2414 | return ptmin; |
---|
| 2415 | |
---|
| 2416 | } |
---|
| 2417 | |
---|
| 2418 | //-------------------------------------------------------------------------- |
---|
| 2419 | |
---|
| 2420 | // Function to compute "pythia pT separation" from Particle input, as a helper |
---|
| 2421 | // for rhoms(...). |
---|
| 2422 | |
---|
| 2423 | double MergingHooks::rhoPythia(const Particle& RadAfterBranch, |
---|
| 2424 | const Particle& EmtAfterBranch, |
---|
| 2425 | const Particle& RecAfterBranch, int ShowerType){ |
---|
| 2426 | |
---|
| 2427 | // Save type: 1 = FSR pT definition, else ISR definition |
---|
| 2428 | int Type = ShowerType; |
---|
| 2429 | // Calculate virtuality of splitting |
---|
| 2430 | int sign = (Type==1) ? 1 : -1; |
---|
| 2431 | Vec4 Q(RadAfterBranch.p() + sign*EmtAfterBranch.p()); |
---|
| 2432 | double Qsq = sign * Q.m2Calc(); |
---|
| 2433 | // Mass term of radiator |
---|
| 2434 | double m2Rad = ( includeMassive() |
---|
| 2435 | && abs(RadAfterBranch.id()) >= 4 |
---|
| 2436 | && abs(RadAfterBranch.id()) < 7) |
---|
| 2437 | ? pow(particleDataPtr->m0(RadAfterBranch.id()), 2) |
---|
| 2438 | : 0.; |
---|
| 2439 | // Construct 2->3 variables for FSR |
---|
| 2440 | Vec4 sum = RadAfterBranch.p() + RecAfterBranch.p() |
---|
| 2441 | + EmtAfterBranch.p(); |
---|
| 2442 | double m2Dip = sum.m2Calc(); |
---|
| 2443 | double x1 = 2. * (sum * RadAfterBranch.p()) / m2Dip; |
---|
| 2444 | double x3 = 2. * (sum * EmtAfterBranch.p()) / m2Dip; |
---|
| 2445 | // Construct momenta of dipole before/after splitting for ISR |
---|
| 2446 | Vec4 qBR(RadAfterBranch.p() - EmtAfterBranch.p() + RecAfterBranch.p()); |
---|
| 2447 | Vec4 qAR(RadAfterBranch.p() + RecAfterBranch.p()); |
---|
| 2448 | // Calculate z of splitting, different for FSR and ISR |
---|
| 2449 | double z = (Type==1) ? x1/(x1+x3) |
---|
| 2450 | : (qBR.m2Calc())/( qAR.m2Calc()); |
---|
| 2451 | // Separation of splitting, different for FSR and ISR |
---|
| 2452 | double pTpyth = (Type==1) ? z*(1.-z) : (1.-z); |
---|
| 2453 | // pT^2 = separation*virtuality |
---|
| 2454 | pTpyth *= (Qsq - sign*m2Rad); |
---|
| 2455 | if (pTpyth < 0.) pTpyth = 0.; |
---|
| 2456 | // Return pT |
---|
| 2457 | return sqrt(pTpyth); |
---|
| 2458 | } |
---|
| 2459 | |
---|
| 2460 | //-------------------------------------------------------------------------- |
---|
| 2461 | |
---|
| 2462 | // Function to find a colour (anticolour) index in the input event. |
---|
| 2463 | // Helper for rhoms |
---|
| 2464 | // IN int col : Colour tag to be investigated |
---|
| 2465 | // int iExclude1 : Identifier of first particle to be excluded |
---|
| 2466 | // from search |
---|
| 2467 | // int iExclude2 : Identifier of second particle to be excluded |
---|
| 2468 | // from search |
---|
| 2469 | // Event event : event to be searched for colour tag |
---|
| 2470 | // int type : Tag to define if col should be counted as |
---|
| 2471 | // colour (type = 1) [->find anti-colour index |
---|
| 2472 | // contracted with col] |
---|
| 2473 | // anticolour (type = 2) [->find colour index |
---|
| 2474 | // contracted with col] |
---|
| 2475 | // OUT int : Position of particle in event record |
---|
| 2476 | // contraced with col [0 if col is free tag] |
---|
| 2477 | |
---|
| 2478 | int MergingHooks::findColour(int col, int iExclude1, int iExclude2, |
---|
| 2479 | const Event& event, int type, bool isHardIn){ |
---|
| 2480 | |
---|
| 2481 | bool isHard = isHardIn; |
---|
| 2482 | int index = 0; |
---|
| 2483 | |
---|
| 2484 | if (isHard){ |
---|
| 2485 | // Search event record for matching colour & anticolour |
---|
| 2486 | for(int n = 0; n < event.size(); ++n) { |
---|
| 2487 | if ( n != iExclude1 && n != iExclude2 |
---|
| 2488 | && event[n].colType() != 0 |
---|
| 2489 | &&( event[n].status() > 0 // Check outgoing |
---|
| 2490 | || event[n].status() == -21) ) { // Check incoming |
---|
| 2491 | if ( event[n].acol() == col ) { |
---|
| 2492 | index = -n; |
---|
| 2493 | break; |
---|
| 2494 | } |
---|
| 2495 | if ( event[n].col() == col ){ |
---|
| 2496 | index = n; |
---|
| 2497 | break; |
---|
| 2498 | } |
---|
| 2499 | } |
---|
| 2500 | } |
---|
| 2501 | } else { |
---|
| 2502 | |
---|
| 2503 | // Search event record for matching colour & anticolour |
---|
| 2504 | for(int n = 0; n < event.size(); ++n) { |
---|
| 2505 | if ( n != iExclude1 && n != iExclude2 |
---|
| 2506 | && event[n].colType() != 0 |
---|
| 2507 | &&( event[n].status() == 43 // Check outgoing from ISR |
---|
| 2508 | || event[n].status() == 51 // Check outgoing from FSR |
---|
| 2509 | || event[n].status() == 52 // Check outgoing from FSR |
---|
| 2510 | || event[n].status() == -41 // first initial |
---|
| 2511 | || event[n].status() == -42) ) { // second initial |
---|
| 2512 | if ( event[n].acol() == col ) { |
---|
| 2513 | index = -n; |
---|
| 2514 | break; |
---|
| 2515 | } |
---|
| 2516 | if ( event[n].col() == col ){ |
---|
| 2517 | index = n; |
---|
| 2518 | break; |
---|
| 2519 | } |
---|
| 2520 | } |
---|
| 2521 | } |
---|
| 2522 | } |
---|
| 2523 | // if no matching colour / anticolour has been found, return false |
---|
| 2524 | if ( type == 1 && index < 0) return abs(index); |
---|
| 2525 | if ( type == 2 && index > 0) return abs(index); |
---|
| 2526 | |
---|
| 2527 | return 0; |
---|
| 2528 | } |
---|
| 2529 | |
---|
| 2530 | //-------------------------------------------------------------------------- |
---|
| 2531 | |
---|
| 2532 | // Function to check if the properties of the input particle should be |
---|
| 2533 | // checked against the cut-based merging scale defintion. |
---|
| 2534 | |
---|
| 2535 | bool MergingHooks::checkAgainstCut( const Particle& particle){ |
---|
| 2536 | |
---|
| 2537 | // Do not check uncoloured particles. |
---|
| 2538 | if (particle.colType() == 0) |
---|
| 2539 | return false; |
---|
| 2540 | // Do not check tops and bottoms. |
---|
| 2541 | if (particle.idAbs() == 5 || particle.idAbs() == 6) |
---|
| 2542 | return false; |
---|
| 2543 | // Done |
---|
| 2544 | return true; |
---|
| 2545 | |
---|
| 2546 | } |
---|
| 2547 | |
---|
| 2548 | //-------------------------------------------------------------------------- |
---|
| 2549 | |
---|
| 2550 | // Find the if the event passes the Delta R_{ij}, pT_{i} and Q_{ij} cuts on |
---|
| 2551 | // the matrix element, as needed for cut-based merging scale definition. |
---|
| 2552 | |
---|
| 2553 | double MergingHooks::cutbasedms( const Event& event ){ |
---|
| 2554 | |
---|
| 2555 | // Only check first emission. |
---|
| 2556 | if (!isFirstEmission(event)) return -1.; |
---|
| 2557 | |
---|
| 2558 | // Save allowed final state particles |
---|
| 2559 | vector<int> partons; |
---|
| 2560 | for( int i=0; i < event.size(); ++i) |
---|
| 2561 | if ( event[i].isFinal() && checkAgainstCut(event[i]) ) |
---|
| 2562 | partons.push_back(i); |
---|
| 2563 | |
---|
| 2564 | // Declare overall veto |
---|
| 2565 | bool doVeto = false; |
---|
| 2566 | // Declare vetoes |
---|
| 2567 | bool vetoPT = false; |
---|
| 2568 | bool vetoRjj = false; |
---|
| 2569 | bool vetoMjj = false; |
---|
| 2570 | // Declare cuts used in matrix element |
---|
| 2571 | double pTjmin = pTiMS(); |
---|
| 2572 | double mjjmin = QijMS(); |
---|
| 2573 | double rjjmin = dRijMS(); |
---|
| 2574 | |
---|
| 2575 | // Declare minimum values |
---|
| 2576 | double minPT = event[0].e(); |
---|
| 2577 | double minRJJ = 10.; |
---|
| 2578 | double minMJJ = event[0].e(); |
---|
| 2579 | |
---|
| 2580 | // Check matrix element cuts |
---|
| 2581 | for( int i=0; i < int(partons.size()); ++i){ |
---|
| 2582 | // Save pT value |
---|
| 2583 | minPT = min(minPT,event[partons[i]].pT()); |
---|
| 2584 | |
---|
| 2585 | // Check two-parton cuts |
---|
| 2586 | for( int j=0; j < int(partons.size()); ++j){ |
---|
| 2587 | if (i!=j){ |
---|
| 2588 | |
---|
| 2589 | // Save delta R value |
---|
| 2590 | minRJJ = min(minRJJ, deltaRij( event[partons[i]].p(), |
---|
| 2591 | event[partons[j]].p()) ); |
---|
| 2592 | // Save delta R value |
---|
| 2593 | minMJJ = min(minMJJ, ( event[partons[i]].p() |
---|
| 2594 | +event[partons[j]].p() ).mCalc() ); |
---|
| 2595 | |
---|
| 2596 | } |
---|
| 2597 | } |
---|
| 2598 | // Done with cut evaluation |
---|
| 2599 | } |
---|
| 2600 | |
---|
| 2601 | // Check if all partons are in the matrix element region |
---|
| 2602 | if (minPT > pTjmin) vetoPT = true; |
---|
| 2603 | if (minRJJ > rjjmin) vetoRjj = true; |
---|
| 2604 | if (minMJJ > mjjmin) vetoMjj = true; |
---|
| 2605 | |
---|
| 2606 | // In the matrix element calculation, we have rejected the events if any of |
---|
| 2607 | // the cuts had not been fulfilled, |
---|
| 2608 | // i.e. we are in the matrix element domain if all cuts are fulfilled. |
---|
| 2609 | // We veto any emission in the ME region. |
---|
| 2610 | // Disregard the two-parton cuts if only one parton in the final state |
---|
| 2611 | if (int(partons.size() == 1)) |
---|
| 2612 | doVeto = vetoPT; |
---|
| 2613 | else |
---|
| 2614 | // Veto if the combination of cuts would be in the ME region |
---|
| 2615 | doVeto = vetoPT && vetoRjj && vetoMjj; |
---|
| 2616 | |
---|
| 2617 | // If event is above merging scale, veto |
---|
| 2618 | if (doVeto) return 1.; |
---|
| 2619 | |
---|
| 2620 | // Else, do nothing |
---|
| 2621 | return -1.; |
---|
| 2622 | |
---|
| 2623 | } |
---|
| 2624 | |
---|
| 2625 | //-------------------------------------------------------------------------- |
---|
| 2626 | |
---|
| 2627 | // Function to compute Delta R separation from 4-vector input. |
---|
| 2628 | |
---|
| 2629 | double MergingHooks::deltaRij(Vec4 jet1, Vec4 jet2){ |
---|
| 2630 | |
---|
| 2631 | // Declare return variable |
---|
| 2632 | double deltaR = 0.; |
---|
| 2633 | // Get delta_eta and cosh(Delta_eta) for hadronic collisions |
---|
| 2634 | double eta1 = 0.5*log( (jet1.e() + jet1.pz()) / (jet1.e() - jet1.pz()) ); |
---|
| 2635 | double eta2 = 0.5*log( (jet2.e() + jet2.pz()) / (jet2.e() - jet2.pz()) ); |
---|
| 2636 | // Get delta_phi and cos(Delta_phi) for hadronic collisions |
---|
| 2637 | double pt1 = sqrt( pow(jet1.px(),2) + pow(jet1.py(),2) ); |
---|
| 2638 | double pt2 = sqrt( pow(jet2.px(),2) + pow(jet2.py(),2) ); |
---|
| 2639 | double cosdPhi = ( jet1.px()*jet2.px() + jet1.py()*jet2.py() ) / (pt1*pt2); |
---|
| 2640 | double dPhi = acos( cosdPhi ); |
---|
| 2641 | // Calculate kT durham like fastjet |
---|
| 2642 | deltaR = sqrt(pow(eta1-eta2,2) + pow(dPhi,2)); |
---|
| 2643 | // Return kT |
---|
| 2644 | return deltaR; |
---|
| 2645 | } |
---|
| 2646 | |
---|
| 2647 | //========================================================================== |
---|
| 2648 | |
---|
| 2649 | } // end namespace Pythia8 |
---|