| 1 |
// This simple program generates various signal processes for
|
| 2 |
// MSSM bbPhi process and its backgrounds.
|
| 3 |
// It includes the mixing of required level of pileup.
|
| 4 |
// It then takes pythia output and runs it through very simplistic
|
| 5 |
// detector simulation using parameterizations, including making
|
| 6 |
// isolated light leptons, photons, composite tau, jet and b-tagged
|
| 7 |
// jet objects.
|
| 8 |
// It saves the output in root format for later analysis.
|
| 9 |
|
| 10 |
using namespace std;
|
| 11 |
#include <math.h>
|
| 12 |
|
| 13 |
#include "Pythia.h"
|
| 14 |
using namespace Pythia8;
|
| 15 |
|
| 16 |
#include "UltraFastSim.h"
|
| 17 |
|
| 18 |
int main(int argc, char **argv) {
|
| 19 |
// Generator. Process selection. LHC initialization. Histogram.
|
| 20 |
Pythia pythia;
|
| 21 |
int nEvents = 0;
|
| 22 |
int runNumber = 0;
|
| 23 |
int meanPileupEventCount = 0;
|
| 24 |
if(argc < 3 || argc > 5)
|
| 25 |
{
|
| 26 |
cerr << "Command syntax: " << argv[0] << " BBH[...]" << " <nEvents> [RandomSeed] [meanPileupEventCount]" << endl;
|
| 27 |
cerr << "Command syntax: " << argv[0] << " BBA[...]" << " <nEvents> [RandomSeed] [meanPileupEventCount]" << endl;
|
| 28 |
cerr << "or " << argv[0] << " ZLL[...]" << " <nEvents> [RandomSeed] [meanPileupEventCount]" << endl;
|
| 29 |
cerr << "or " << argv[0] << " ZMM[...]" << " <nEvents> [RandomSeed] [meanPileupEventCount]" << endl;
|
| 30 |
cerr << "or " << argv[0] << " TLN[...]" << " <nEvents> [RandomSeed] [meanPileupEventCount]" << endl;
|
| 31 |
cerr << "or " << argv[0] << " WLN[...]" << " <nEvents> [RandomSeed] [meanPileupEventCount]" << endl;
|
| 32 |
exit(1);
|
| 33 |
}
|
| 34 |
else {
|
| 35 |
nEvents = atoi(argv[2]);
|
| 36 |
if(argc >= 4) runNumber = atoi(argv[3]);
|
| 37 |
if(argc >= 5) meanPileupEventCount = atoi(argv[4]);
|
| 38 |
if(strncmp(argv[1], "ZLL", 3) == 0)
|
| 39 |
{
|
| 40 |
pythia.readString("WeakSingleBoson:ffbar2gmZ = on");
|
| 41 |
pythia.readString("PhaseSpace:mHatMin = 60.");
|
| 42 |
pythia.readString("PhaseSpace:mHatMax = -1");
|
| 43 |
pythia.readString("23:onMode = 0"); // Z decays to leptons only
|
| 44 |
pythia.readString("23:onIfAny = 11 13 15");
|
| 45 |
pythia.readString("15:onMode = 2"); // tau- decays to electrons and muons - second tau decays in all modes
|
| 46 |
pythia.readString("15:onIfAny = 11 13");
|
| 47 |
}
|
| 48 |
else if(strncmp(argv[1], "ZMM", 3) == 0)
|
| 49 |
{
|
| 50 |
pythia.readString("WeakSingleBoson:ffbar2gmZ = on");
|
| 51 |
pythia.readString("PhaseSpace:mHatMin = 60.");
|
| 52 |
pythia.readString("PhaseSpace:mHatMax = -1");
|
| 53 |
pythia.readString("23:onMode = 0"); // Z decays to muons only
|
| 54 |
pythia.readString("23:onIfAny = 13");
|
| 55 |
}
|
| 56 |
else if(strncmp(argv[1], "WLN", 3) == 0)
|
| 57 |
{
|
| 58 |
pythia.readString("WeakSingleBoson:ffbar2W = on");
|
| 59 |
pythia.readString("24:onMode = 0"); // W decays to light leptons only
|
| 60 |
pythia.readString("24:onIfAny = 11 13");
|
| 61 |
}
|
| 62 |
else if(strncmp(argv[1], "TLN", 3) == 0)
|
| 63 |
{
|
| 64 |
pythia.readString("Top:all = on");
|
| 65 |
pythia.readString("24:onMode = 2"); // W+ decays to light leptons only
|
| 66 |
pythia.readString("24:onIfAny = 11 13");
|
| 67 |
}
|
| 68 |
else if(strncmp(argv[1], "ZH", 2) == 0)
|
| 69 |
{
|
| 70 |
pythia.readString("HiggsSM:ffbar2HZ = on");
|
| 71 |
pythia.readString("25:m0 = 120");
|
| 72 |
pythia.readString("25:onMode = 0"); // Higgs decays to bbBar only
|
| 73 |
pythia.readString("25:onIfAny = 5");
|
| 74 |
pythia.readString("23:onMode = 0"); // Z decays to mu+,mu- only (for trigger)
|
| 75 |
pythia.readString("23:onIfAny = 13");
|
| 76 |
}
|
| 77 |
else if(strncmp(argv[1], "BB", 2) == 0)
|
| 78 |
{
|
| 79 |
pythia.readString("Higgs:useBSM = on");
|
| 80 |
if(strncmp(argv[1], "BBH", 3) == 0)
|
| 81 |
pythia.readString("HiggsBSM:gg2H2bbbar = on");
|
| 82 |
else
|
| 83 |
pythia.readString("HiggsBSM:gg2A3bbbar = on");
|
| 84 |
pythia.readString("25:m0 = 129");
|
| 85 |
pythia.readString("35:m0 = 499.7");
|
| 86 |
pythia.readString("36:m0 = 500");
|
| 87 |
pythia.readString("37:m0 = 506");
|
| 88 |
pythia.readString("HiggsHchg:tanBeta = 30");
|
| 89 |
pythia.readString("35:onMode = 0"); // H2(H_2) decays only to tau-pairs
|
| 90 |
pythia.readString("35:onIfAny = 15");
|
| 91 |
pythia.readString("36:onMode = 0"); // A0(H_3) decays only to tau-pairs
|
| 92 |
pythia.readString("36:onIfAny = 15");
|
| 93 |
}
|
| 94 |
else
|
| 95 |
{
|
| 96 |
cerr << "Unknown process type " << argv[1] << " - aborting" << endl;
|
| 97 |
exit(1);
|
| 98 |
}
|
| 99 |
}
|
| 100 |
|
| 101 |
// Initialize pythia
|
| 102 |
|
| 103 |
pythia.init( 2212, 2212, 14000.);
|
| 104 |
pythia.particleData.listAll();
|
| 105 |
Rndm * rndmPtr = &pythia.rndm;
|
| 106 |
rndmPtr->init(runNumber);
|
| 107 |
|
| 108 |
// Pileup pythia
|
| 109 |
|
| 110 |
Pythia pileupPythia;
|
| 111 |
pileupPythia.readString("SoftQCD:minBias = on");
|
| 112 |
pileupPythia.init( 2212, 2212, 14000.);
|
| 113 |
pileupPythia.rndm.init(runNumber);
|
| 114 |
|
| 115 |
// Ultra Fast Simulator
|
| 116 |
|
| 117 |
UltraFastSim ufs(rndmPtr);
|
| 118 |
|
| 119 |
// Begin event loop
|
| 120 |
for (int iEvent = 0; iEvent < nEvents; ) {
|
| 121 |
|
| 122 |
// Generate event. Skip if error. List first one.
|
| 123 |
if (!pythia.next()) continue;
|
| 124 |
|
| 125 |
if(iEvent < 10) pythia.event.list();
|
| 126 |
|
| 127 |
// Add pileup
|
| 128 |
|
| 129 |
int pileupEventCount = 0;
|
| 130 |
if(meanPileupEventCount > 0) pileupEventCount = meanPileupEventCount; // * rmdmPtr->pois(); (not available yet)
|
| 131 |
for (int puEvent = 0; puEvent < pileupEventCount; ) {
|
| 132 |
if(!pileupPythia.next()) continue;
|
| 133 |
for(int i = 0; i < pileupPythia.event.size(); i++) {
|
| 134 |
Particle& particle = pileupPythia.event[i];
|
| 135 |
if(particle.status() > 0) {
|
| 136 |
if(particle.isVisible()) {
|
| 137 |
if(particle.pT() > 0.5) {
|
| 138 |
pythia.event.append(particle);
|
| 139 |
}
|
| 140 |
}
|
| 141 |
}
|
| 142 |
}
|
| 143 |
puEvent++;
|
| 144 |
}
|
| 145 |
|
| 146 |
// Ultra fast simulation
|
| 147 |
|
| 148 |
if(!ufs.run(pythia.event))
|
| 149 |
{
|
| 150 |
cerr << "Ultra fast simulation failed - aborting" << endl;
|
| 151 |
exit(1);
|
| 152 |
}
|
| 153 |
|
| 154 |
cout << "Number of Particles = " << ufs.particleList().size() << endl;
|
| 155 |
cout << "Number of Gen Elecs = " << ufs.electronList().size() << endl;
|
| 156 |
cout << "Number of Gen Muons = " << ufs.muonList().size() << endl;
|
| 157 |
cout << "Number of Gen Taus = " << ufs.genTauList().size() << endl;
|
| 158 |
cout << "Number of b Quarks = " << ufs.bQuarkList().size() << endl;
|
| 159 |
cout << "Number of Jets = " << ufs.sortedJetList().size() << endl;
|
| 160 |
cout << "Number of bJets = " << ufs.bJetList().size() << endl;
|
| 161 |
cout << "Number of taus = " << ufs.tauList().size() << endl;
|
| 162 |
cout << endl;
|
| 163 |
|
| 164 |
// End of event loop. Statistics. Histogram. Done.
|
| 165 |
|
| 166 |
if(!(iEvent % 100)) cout << "Processed event " << iEvent << endl;
|
| 167 |
iEvent++;
|
| 168 |
|
| 169 |
}
|
| 170 |
|
| 171 |
// Save output
|
| 172 |
|
| 173 |
pythia.statistics();
|
| 174 |
pileupPythia.statistics();
|
| 175 |
|
| 176 |
return 0;
|
| 177 |
|
| 178 |
}
|
