/usr/share/pythia8-examples/examples/main26.cc is in pythia8-examples 8.1.86-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | // main26.cc is a part of the PYTHIA event generator.
// Copyright (C) 2014 Torbjorn Sjostrand.
// PYTHIA is licenced under the GNU GPL version 2, see COPYING for details.
// Please respect the MCnet Guidelines, see GUIDELINES for details.
// This is a test program for the extra dimensions processes.
// Author: Stefan Ask (Stefan DOT Ask AT cern DOT ch)
// Documentation: S. Ask et al., arXiv:0809.4750 and arXiv:0912.4233
#include "Pythia8/Pythia.h"
using namespace Pythia8;
// The main program.
int main() {
// Test cases
// 1 = Jet + G (real G emission)
// 2 = Jet + U (real U emission)
// 3 = Z + G (real G emission)
// 4 = Z + U (real U emission)
// 5 = gamma gamma (LED G* exchange)
// 6 = l lbar (LED U* exchange).
// Note: charged leptons only!
// 7 = Z_KK/gamma_KK (TEV ED resonance)
// 8 = G* (RS resonance, SM on the TeV brane)
// 9 = kk-gluon* (RS resonance)
int nTest = 1;
// Number of events to generate. Max number of errors.
int nEvent = 1000;
int nAbort = 50;
// Pythia generator.
Pythia pythia;
// PYTHIA paramters:
pythia.readString("PhaseSpace:showViolation = off");
// Test case parameters
if (nTest == 1) {
pythia.readString("ExtraDimensionsLED:monojet = on");
pythia.readString("ExtraDimensionsLED:n = 4");
pythia.readString("ExtraDimensionsLED:MD = 4000.");
pythia.readString("ExtraDimensionsLED:CutOffmode = 3");
pythia.readString("ExtraDimensionsLED:t = 2");
pythia.readString("5000039:m0 = 2500.");
pythia.readString("5000039:mWidth = 1500.");
pythia.readString("5000039:mMin = 1.");
pythia.readString("5000039:mMax = 13990.");
pythia.readString("PhaseSpace:pTHatMin = 700.");
} else if (nTest == 2){
pythia.readString("ExtraDimensionsUnpart:gg2Ug = off");
pythia.readString("ExtraDimensionsUnpart:qg2Uq = on");
pythia.readString("ExtraDimensionsUnpart:qqbar2Ug = on");
pythia.readString("ExtraDimensionsUnpart:spinU = 1");
pythia.readString("ExtraDimensionsUnpart:dU = 1.2");
pythia.readString("ExtraDimensionsUnpart:LambdaU = 1000");
pythia.readString("ExtraDimensionsUnpart:lambda = 1.0");
pythia.readString("ExtraDimensionsUnpart:CutOffmode = 0");
pythia.readString("5000039:m0 = 300.");
pythia.readString("5000039:mWidth = 500.");
pythia.readString("5000039:mMin = 1.");
pythia.readString("5000039:mMax = 13990.");
pythia.readString("PhaseSpace:pTHatMin = 700.");
} else if (nTest == 3){
pythia.readString("ExtraDimensionsLED:ffbar2GZ = on");
pythia.readString("ExtraDimensionsLED:n = 6");
pythia.readString("ExtraDimensionsLED:MD = 2000.");
pythia.readString("ExtraDimensionsLED:CutOffmode = 1");
pythia.readString("5000039:m0 = 3000.");
pythia.readString("5000039:mWidth = 1500.");
pythia.readString("5000039:mMin = 1.");
pythia.readString("5000039:mMax = 13990.");
pythia.readString("PhaseSpace:pTHatMin = 50.");
} else if (nTest == 4){
pythia.readString("ExtraDimensionsUnpart:ffbar2UZ = on");
pythia.readString("ExtraDimensionsUnpart:spinU = 1");
pythia.readString("ExtraDimensionsUnpart:dU = 2.0");
pythia.readString("ExtraDimensionsUnpart:LambdaU = 1000");
pythia.readString("ExtraDimensionsUnpart:lambda = 1.000");
pythia.readString("ExtraDimensionsUnpart:CutOffmode = 0");
pythia.readString("5000039:m0 = 500.");
pythia.readString("5000039:mWidth = 1000.");
pythia.readString("5000039:mMin = 1.");
pythia.readString("5000039:mMax = 13990.");
pythia.readString("PhaseSpace:pTHatMin = 50.");
} else if (nTest == 5){
pythia.readString("ExtraDimensionsLED:ffbar2gammagamma = on");
pythia.readString("ExtraDimensionsLED:gg2gammagamma = on");
pythia.readString("ExtraDimensionsLED:LambdaT = 3300.");
pythia.readString("PhaseSpace:mHatMin = 800.");
} else if (nTest == 6){
pythia.readString("ExtraDimensionsUnpart:ffbar2llbar = on");
pythia.readString("ExtraDimensionsUnpart:gg2llbar = off");
pythia.readString("ExtraDimensionsUnpart:spinU = 1");
pythia.readString("ExtraDimensionsUnpart:dU = 1.3");
pythia.readString("ExtraDimensionsUnpart:LambdaU = 1000");
pythia.readString("ExtraDimensionsUnpart:lambda = 1.0");
pythia.readString("ExtraDimensionsUnpart:gXX = 0");
pythia.readString("ExtraDimensionsUnpart:gXY = 0");
pythia.readString("PhaseSpace:mHatMin = 300.");
} else if (nTest == 7){
pythia.readString("ExtraDimensionsTEV:ffbar2mu+mu- = on");
pythia.readString("ExtraDimensionsTEV:gmZmode = 3");
pythia.readString("ExtraDimensionsTEV:nMax = 100");
pythia.readString("ExtraDimensionsTEV:mStar = 4000");
pythia.readString("PhaseSpace:mHatMin = 1000");
pythia.readString("PhaseSpace:mHatMax = 6000");
pythia.readString("5000023:isResonance = false");
} else if (nTest == 8){
pythia.readString("ExtraDimensionsG*:all = on");
} else if (nTest == 9){
pythia.readString("ExtraDimensionsG*:qqbar2KKgluon* = on");
pythia.readString("ExtraDimensionsG*:KKintMode = 2");
pythia.readString("ExtraDimensionsG*:KKgqR = -0.2");
pythia.readString("ExtraDimensionsG*:KKgqL = -0.2");
pythia.readString("ExtraDimensionsG*:KKgbR = -0.2");
pythia.readString("ExtraDimensionsG*:KKgbL = 1.0");
pythia.readString("ExtraDimensionsG*:KKgtR = 5.0");
pythia.readString("ExtraDimensionsG*:KKgtL = 1.0");
pythia.readString("5100021:m0 = 2000");
}
// Switch off sophisticated tau treatment: not yet matched to SUSY.
pythia.readString("ParticleDecays:sophisticatedTau = 0");
// Initialization for LHC.
pythia.readString("Beams:eCM = 14000.");
pythia.init();
// Validation histograms
Hist hEtjet("dN/dETjet: monojet check", 100, 0., 7000.);
Hist hMass("dN/m: graviton mass spectrum", 100, 0., 7000.);
// Begin event loop.
int iAbort = 0;
for (int iEvent = 0; iEvent < nEvent; ++iEvent) {
// Generate events. Quit if many failures.
if (!pythia.next()) {
if (++iAbort < nAbort) continue;
std::cout << " Event generation aborted prematurely, owing to error!\n";
break;
}
// Checked particle index
int tmp_monojet = -1;
// Particle loop
for (int iPart = 0; iPart < pythia.event.size(); ++iPart) {
// From hard process (inital = 21, interm.=22, final=23 state)
if (pythia.event[iPart].statusAbs() == 22) {
// Find Z_KK/gamma_KK or kk-gluon
if( pythia.event[iPart].idAbs() == 5000023
|| pythia.event[iPart].idAbs() == 5100021
|| pythia.event[iPart].idAbs() == 5100039){
hMass.fill( pythia.event[iPart].m() );
}
} else if ( pythia.event[iPart].statusAbs() == 23 ) {
// Find graviton/unparticle
if( pythia.event[iPart].idAbs() == 5000039){
hMass.fill( pythia.event[iPart].m() );
}
// Find mono-jets
if (nTest == 1 || nTest == 2) {
if ( pythia.event[iPart].idAbs() <= 6
|| pythia.event[iPart].idAbs() == 21 ){
if (tmp_monojet >= 0) {
std::cout << "More than one (hard process) mono-jet ! \n";
} else {
tmp_monojet = iPart;
}
}
}
}
}
// Validation mono-jet wrt G.Giudice et al. paper [hep-ph/9811291v2]
if (tmp_monojet >= 0) {
double tmp_eta = pythia.event[tmp_monojet].eta();
double tmp_et = pythia.event[tmp_monojet].eT();
double tmp_et_cut = 1000;
if ( tmp_et >= tmp_et_cut && abs(tmp_eta) < 3 ) {
hEtjet.fill( fabs(tmp_et) );
}
}
}
// Final statistics.
pythia.stat();
cout << hMass << hEtjet;
return 0;
}
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