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Adding code to run pp ref simulations (#2053)
Co-authored-by: Lucamicheletti93 <luca.mike93@gmail.com>
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‎MC/config/PWGDQ/external/generator/GeneratorCocktailPromptCharmoniaToMuonEvtGen_pp5TeV.C‎

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// usage
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// o2-sim -j 4 -n 10 -g external -o sgn --configKeyValues "GeneratorExternal.fileName=GeneratorCocktailPromptCharmoniaToMuonEvtGen_pp5TeV.C;GeneratorExternal.funcName=GeneratorCocktailPromptCharmoniaToMuonEvtGen_pp5TeV()"
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//
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R__ADD_INCLUDE_PATH($O2DPG_MC_CONFIG_ROOT/MC/config/PWGDQ/EvtGen)
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R__ADD_INCLUDE_PATH($O2DPG_MC_CONFIG_ROOT/MC/config/PWGDQ/PromptQuarkonia)
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R__LOAD_LIBRARY(libpythia6)
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#include "GeneratorCocktail.C"
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#include "GeneratorEvtGen.C"
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namespace o2
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{
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namespace eventgen
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{
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class O2_GeneratorParamJpsi : public GeneratorTGenerator
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{
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public:
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O2_GeneratorParamJpsi() : GeneratorTGenerator("ParamJpsi")
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{
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paramJpsi = new GeneratorParam(1, -1, PtJPsipp5TeV, YJPsipp5TeV, V2JPsipp5TeV, IpJPsipp5TeV);
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paramJpsi->SetMomentumRange(0., 1.e6);
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paramJpsi->SetPtRange(0, 999.);
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paramJpsi->SetYRange(-4.2, -2.3);
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paramJpsi->SetPhiRange(0., 360.);
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paramJpsi->SetDecayer(new TPythia6Decayer());
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paramJpsi->SetForceDecay(kNoDecay); // particle left undecayed
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// - - paramJpsi->SetTrackingFlag(1); // (from AliGenParam) -> check this
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setTGenerator(paramJpsi);
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};
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~O2_GeneratorParamJpsi()
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{
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delete paramJpsi;
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};
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Bool_t Init() override
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{
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GeneratorTGenerator::Init();
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paramJpsi->Init();
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return true;
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}
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void SetNSignalPerEvent(Int_t nsig) { paramJpsi->SetNumberParticles(nsig); }
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//-------------------------------------------------------------------------//
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static Double_t PtJPsipp5TeV(const Double_t* px, const Double_t* /*dummy*/)
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{
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// jpsi pT in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
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Double_t x = *px;
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Float_t p0, p1, p2, p3;
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p0 = 1;
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p1 = 4.30923;
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p2 = 1.82061;
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p3 = 4.37563;
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return p0 * x / TMath::Power(1. + TMath::Power(x / p1, p2), p3);
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}
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//-------------------------------------------------------------------------//
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static Double_t YJPsipp5TeV(const Double_t* py, const Double_t* /*dummy*/)
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{
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// jpsi y in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
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Double_t y = *py;
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Float_t p0, p1, p2;
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p0 = 1;
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p1 = 0.0338222;
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p2 = 2.96748;
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return p0 * TMath::Exp(-(1. / 2.) * TMath::Power(((y - p1) / p2), 2));
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}
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//-------------------------------------------------------------------------//
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static Double_t V2JPsipp5TeV(const Double_t* /*dummy*/, const Double_t* /*dummy*/)
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{
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// jpsi v2
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return 0.;
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}
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//-------------------------------------------------------------------------//
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static Int_t IpJPsipp5TeV(TRandom*)
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{
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return 443;
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}
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private:
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GeneratorParam* paramJpsi = nullptr;
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};
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class O2_GeneratorParamPsi : public GeneratorTGenerator
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{
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public:
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O2_GeneratorParamPsi() : GeneratorTGenerator("ParamPsi")
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{
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paramPsi = new GeneratorParam(1, -1, PtPsipp5TeV, YPsipp5TeV, V2Psipp5TeV, IpPsipp5TeV);
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paramPsi->SetMomentumRange(0., 1.e6);
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paramPsi->SetPtRange(0, 999.);
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paramPsi->SetYRange(-4.2, -2.3);
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paramPsi->SetPhiRange(0., 360.);
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paramPsi->SetDecayer(new TPythia6Decayer());
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paramPsi->SetForceDecay(kNoDecay); // particle left undecayed
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// - - paramJpsi->SetTrackingFlag(1); // check this
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setTGenerator(paramPsi);
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};
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~O2_GeneratorParamPsi()
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{
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delete paramPsi;
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};
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Bool_t Init() override
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{
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GeneratorTGenerator::Init();
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paramPsi->Init();
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return true;
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}
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void SetNSignalPerEvent(Int_t nsig) { paramPsi->SetNumberParticles(nsig); }
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//-------------------------------------------------------------------------//
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static Double_t PtPsipp5TeV(const Double_t* px, const Double_t* /*dummy*/)
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{
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// psi2s pT in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
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Double_t x = *px;
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Float_t p0, p1, p2, p3;
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p0 = 1;
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p1 = 2.6444;
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p2 = 6.17572;
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p3 = 0.701753;
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return p0 * x / TMath::Power(1. + TMath::Power(x / p1, p2), p3);
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}
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//-------------------------------------------------------------------------//
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static Double_t YPsipp5TeV(const Double_t* py, const Double_t* /*dummy*/)
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{
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// psi2s y in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
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Double_t y = *py;
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Float_t p0, p1, p2;
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p0 = 1;
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p1 = -17.4857;
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p2 = 2.98887;
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return p0 * TMath::Exp(-(1. / 2.) * TMath::Power(((y - p1) / p2), 2));
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}
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//-------------------------------------------------------------------------//
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static Double_t V2Psipp5TeV(const Double_t* /*dummy*/, const Double_t* /*dummy*/)
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{
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// jpsi v2
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return 0.;
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}
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//-------------------------------------------------------------------------//
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static Int_t IpPsipp5TeV(TRandom*)
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{
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return 100443;
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}
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private:
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GeneratorParam* paramPsi = nullptr;
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};
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} // namespace eventgen
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} // namespace o2
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FairGenerator* GeneratorCocktailPromptCharmoniaToMuonEvtGen_pp5TeV()
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{
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auto genCocktailEvtGen = new o2::eventgen::GeneratorEvtGen<GeneratorCocktail>();
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auto genJpsi = new o2::eventgen::O2_GeneratorParamJpsi;
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genJpsi->SetNSignalPerEvent(4); // 4 J/psi generated per event by GeneratorParam
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auto genPsi = new o2::eventgen::O2_GeneratorParamPsi;
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genPsi->SetNSignalPerEvent(2); // 2 Psi(2S) generated per event by GeneratorParam
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genCocktailEvtGen->AddGenerator(genJpsi, 1); // 2/3 J/psi
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genCocktailEvtGen->AddGenerator(genPsi, 1); // 1/3 Psi(2S)
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TString pdgs = "443;100443";
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std::string spdg;
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TObjArray* obj = pdgs.Tokenize(";");
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genCocktailEvtGen->SetSizePdg(obj->GetEntriesFast());
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for (int i = 0; i < obj->GetEntriesFast(); i++) {
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spdg = obj->At(i)->GetName();
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genCocktailEvtGen->AddPdg(std::stoi(spdg), i);
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printf("PDG %d \n", std::stoi(spdg));
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}
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genCocktailEvtGen->SetForceDecay(kEvtDiMuon);
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return genCocktailEvtGen;
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}

‎MC/config/PWGDQ/external/generator/generator_pythia8_withInjectedPromptSignals_gaptriggered_dq.C‎

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break;
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case 10: // generate cocktail of prompt X_1(3872) and psi2S to Jpsi pi pi at midrapidity
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mGeneratorParam = (Generator*)GeneratorCocktailX3872AndPsi2StoJpsi_pp13TeV();
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break;
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case 11: // generate cocktail of prompt X_1(3872) and psi2S to Jpsi pi pi at midrapidity
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mGeneratorParam = (Generator*)GeneratorCocktailPromptCharmoniaToMuonEvtGen_pp5TeV();
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break;
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}
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mGeneratorParam->Init();

‎MC/config/PWGDQ/ini/Generator_InjectedPromptCharmoniaFwdy_TriggerGap_pp5TeV.ini‎

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### The external generator derives from GeneratorPythia8.
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[GeneratorExternal]
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fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/external/generator/generator_pythia8_withInjectedPromptSignals_gaptriggered_dq.C
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funcName=GeneratorPythia8InjectedPromptCharmoniaGapTriggered(5,11)
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[GeneratorPythia8]
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config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/pythia8/generator/pythia8_inel_triggerGap_pp5TeV.cfg

‎MC/config/PWGDQ/ini/Generator_InjectedPromptJpsiPsi2SFwdy_Pythia8_TriggerGap_pp5TeV.ini‎

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### The external generator derives from GeneratorPythia8.
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[GeneratorExternal]
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fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/external/generator/generator_pythia8Onia_PromptSignals_gaptriggered.C
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funcName=GeneratorPromptJpsiPsi2S_EvtGenFwdY(5,-4.3,-2.3)
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[GeneratorPythia8]
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config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/pythia8/generator/pythia8_onia_triggerGap_pp5TeV.cfg

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