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| 29 | |
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| 30 | <h2>Glossary</h2> |
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| 31 | |
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| 32 | <dl> |
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| 33 | |
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| 34 | <dt>BR</dt> |
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| 35 | <dd>Beam Remnants; not much used since it may be confused with |
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| 36 | Branching Ratio</dd> |
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| 37 | |
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| 38 | <dt>BSM</dt> |
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| 39 | <dd>Beyond-the-Standard-Model physics, as a generic term for anything |
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| 40 | not contained within the SM</dd> |
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| 41 | |
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| 42 | <dt>FSR</dt> |
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| 43 | <dd>Final-State Radiation, implemented in terms of timelike showers</dd> |
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| 44 | |
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| 45 | <dt>LHA</dt> |
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| 46 | <dd>Les Houches Accord for user processes, describing which process-level |
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| 47 | information should be stored to allow further showering and hadronization |
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| 48 | of "skeleton" hard processes</dd> |
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| 49 | |
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| 50 | <dt>LHAPDF</dt> |
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| 51 | <dd>Les Houches Accord Parton Distribution Functions, originally a standard |
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| 52 | format for defining PDF's and later a library with such PDF's</dd> |
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| 53 | |
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| 54 | <dt>LHEF</dt> |
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| 55 | <dd>Les Houches Event File(s), a file format for storing LHA process and |
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| 56 | event information</dd> |
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| 57 | |
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| 58 | <dt>ISR</dt> |
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| 59 | <dd>Initial-State Radiation, implemented in terms of spacelike showers</dd> |
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| 60 | |
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| 61 | <dt>MPI</dt> |
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| 62 | <dd>Multiparton Interactions, i.e. several (more or less) independent |
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| 63 | parton-parton subcollisions as part of a hadron-hadron event (previously |
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| 64 | called MI for multiple interactions)</dd> |
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| 65 | |
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| 66 | <dt>MSSM</dt> |
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| 67 | <dd>Minimal Supersymmetric extension of the Standard Model</dd> |
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| 68 | |
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| 69 | <dt>PDF</dt> |
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| 70 | <dd>Parton Distribution Function (alternatively Parton Density |
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| 71 | Function)</dd> |
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| 72 | |
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| 73 | <dt>PDG code</dt> |
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| 74 | <dd>a scheme for assigning unique integers, particle identity codes, |
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| 75 | to known and hypothetical particles; code rules and tables are published |
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| 76 | in the RPP (see below).</dd> |
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| 77 | |
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| 78 | <dt>pileup</dt> |
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| 79 | <dd>several hadron-hadron collisions in a bunch crossing; not to |
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| 80 | be confused with MPI</dd> |
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| 81 | |
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| 82 | <dt>RPP</dt> |
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| 83 | <dd>Review of Particle Physics, the biannual review by the ParticleData Group |
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| 84 | (PDG) from which many Standard-Model parameter values and much particle data |
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| 85 | has been taken (but, given the poor data on many hadron resonances, a lot of |
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| 86 | extra (guess)work is needed)</dd> |
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| 87 | |
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| 88 | <dt>setting</dt> |
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| 89 | <dd>collectively used to denote all the boolean <code>flag</code>, |
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| 90 | integer <code>mode</code>, double-precision <code>parm</code> |
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| 91 | and string <code>word</code> variables that can be set by the user |
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| 92 | to steer the behaviour of a run; normally particle data are considered |
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| 93 | separately but clearly are closely related</dd> |
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| 94 | |
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| 95 | <dt>SLHA</dt> |
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| 96 | <dd>SUSY Les Houchs Accord for interchange of mass and coupling information |
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| 97 | in SUSY scenarios, via a well-defined file format</dd> |
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| 98 | |
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| 99 | <dt>SM</dt> |
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| 100 | <dd>the Standard Model of particle physics</dd> |
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| 101 | |
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| 102 | <dt>SUSY</dt> |
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| 103 | <dd>SUperSYmmetry</dd> |
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| 104 | |
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| 105 | <dt>units</dt> |
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| 106 | <dd>Normal PYTHIA input, internal operations and output is based on a set of |
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| 107 | standard units, such as: |
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| 108 | <br/>GeV for all energies, momenta and masses, always with <i>c = 1</i>; |
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| 109 | <br/>mm for all distances and mm/<i>c</i> for all times, |
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| 110 | so that again they match for <i>c = 1</i>; |
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| 111 | <br/>mb for all cross sections (but input or output via the Les Houches |
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| 112 | Accord takes into account that the unit there is pb) |
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| 113 | </dd> |
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| 114 | |
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| 115 | </dl> |
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| 116 | |
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| 117 | </body> |
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| 118 | </html> |
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| 119 | |
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| 120 | <!-- Copyright (C) 2012 Torbjorn Sjostrand --> |
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