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): "; |
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430 | cin >> tempInt; |
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431 | incom.push_back(tempInt); |
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432 | tempInt = 0; |
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433 | cout << endl; |
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434 | cout << "Please specify intermediate particle, if any "; |
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435 | cout << "(0 for none, else PDG code): "; |
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436 | cin >> tempInt; |
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437 | inter.push_back(tempInt); |
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438 | cout << endl; |
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439 | do { |
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440 | tempInt = 0; |
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441 | cout << "Please specify outgoing particle "; |
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442 | cout << "(jet=2212, else PDG code, exit with 99): "; |
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443 | cin >> tempInt; |
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444 | if (tempInt != 99) outgo.push_back(tempInt); |
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445 | } while(tempInt != 99); |
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446 | cout << endl; |
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447 | } else { |
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448 | cout << "LHE file not produced by SHERPA or MG/ME - "; |
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449 | cout << "Using default process and tms" << endl; |
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450 | incom.push_back(2212); |
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451 | incom.push_back(2212); |
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452 | inter.push_back(24); |
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453 | outgo.push_back(-11); |
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454 | outgo.push_back(12); |
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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 |
---|