Fixing issue with pp ref generator

Author: lucamicheletti

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

@@ -492,6 +492,152 @@ class O2_GeneratorParamChiC2 : public GeneratorTGenerator
   GeneratorParam* paramChiC2 = nullptr;
 };
 
+class O2_GeneratorParamJpsipp5TeV : public GeneratorTGenerator
+{
+
+ public:
+  O2_GeneratorParamJpsipp5TeV() : GeneratorTGenerator("ParamJpsi")
+  {
+    paramJpsi = new GeneratorParam(1, -1, PtJPsipp5TeV, YJPsipp5TeV, V2JPsipp5TeV, IpJPsipp5TeV);
+    paramJpsi->SetMomentumRange(0., 1.e6);
+    paramJpsi->SetPtRange(0, 999.);
+    paramJpsi->SetYRange(-4.2, -2.3);
+    paramJpsi->SetPhiRange(0., 360.);
+    paramJpsi->SetDecayer(new TPythia6Decayer());
+    paramJpsi->SetForceDecay(kNoDecay); // particle left undecayed
+    // - - paramJpsi->SetTrackingFlag(1);  // (from AliGenParam) -> check this
+    setTGenerator(paramJpsi);
+  };
+
+  ~O2_GeneratorParamJpsipp5TeV()
+  {
+    delete paramJpsi;
+  };
+
+  Bool_t Init() override
+  {
+    GeneratorTGenerator::Init();
+    paramJpsi->Init();
+    return true;
+  }
+
+  void SetNSignalPerEvent(Int_t nsig) { paramJpsi->SetNumberParticles(nsig); }
+
+  //-------------------------------------------------------------------------//
+  static Double_t PtJPsipp5TeV(const Double_t* px, const Double_t* /*dummy*/)
+  {
+    // jpsi pT in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
+    Double_t x = *px;
+    Float_t p0, p1, p2, p3;
+    p0 = 1;
+    p1 = 4.30923;
+    p2 = 1.82061;
+    p3 = 4.37563;
+    return p0 * x / TMath::Power(1. + TMath::Power(x / p1, p2), p3);
+  }
+
+  //-------------------------------------------------------------------------//
+  static Double_t YJPsipp5TeV(const Double_t* py, const Double_t* /*dummy*/)
+  {
+    // jpsi y in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
+    Double_t y = *py;
+    Float_t p0, p1, p2;
+    p0 = 1;
+    p1 = 0.0338222;
+    p2 = 2.96748;
+    return p0 * TMath::Exp(-(1. / 2.) * TMath::Power(((y - p1) / p2), 2));
+  }
+
+  //-------------------------------------------------------------------------//
+  static Double_t V2JPsipp5TeV(const Double_t* /*dummy*/, const Double_t* /*dummy*/)
+  {
+    // jpsi v2
+    return 0.;
+  }
+
+  //-------------------------------------------------------------------------//
+  static Int_t IpJPsipp5TeV(TRandom*)
+  {
+    return 443;
+  }
+
+ private:
+  GeneratorParam* paramJpsi = nullptr;
+};
+
+class O2_GeneratorParamPsipp5TeV : public GeneratorTGenerator
+{
+
+ public:
+  O2_GeneratorParamPsipp5TeV() : GeneratorTGenerator("ParamPsi")
+  {
+    paramPsi = new GeneratorParam(1, -1, PtPsipp5TeV, YPsipp5TeV, V2Psipp5TeV, IpPsipp5TeV);
+    paramPsi->SetMomentumRange(0., 1.e6);
+    paramPsi->SetPtRange(0, 999.);
+    paramPsi->SetYRange(-4.2, -2.3);
+    paramPsi->SetPhiRange(0., 360.);
+    paramPsi->SetDecayer(new TPythia6Decayer());
+    paramPsi->SetForceDecay(kNoDecay); // particle left undecayed
+    // - - paramJpsi->SetTrackingFlag(1);  // check this
+    setTGenerator(paramPsi);
+  };
+
+  ~O2_GeneratorParamPsipp5TeV()
+  {
+    delete paramPsi;
+  };
+
+  Bool_t Init() override
+  {
+    GeneratorTGenerator::Init();
+    paramPsi->Init();
+    return true;
+  }
+
+  void SetNSignalPerEvent(Int_t nsig) { paramPsi->SetNumberParticles(nsig); }
+
+  //-------------------------------------------------------------------------//
+  static Double_t PtPsipp5TeV(const Double_t* px, const Double_t* /*dummy*/)
+  {
+    // psi2s pT in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
+    Double_t x = *px;
+    Float_t p0, p1, p2, p3;
+    p0 = 1;
+    p1 = 2.6444;
+    p2 = 6.17572;
+    p3 = 0.701753;
+    return p0 * x / TMath::Power(1. + TMath::Power(x / p1, p2), p3);
+  }
+
+  //-------------------------------------------------------------------------//
+  static Double_t YPsipp5TeV(const Double_t* py, const Double_t* /*dummy*/)
+  {
+    // psi2s y in pp at 5.02 TeV, tuned on https://www.hepdata.net/record/ins1935680
+    Double_t y = *py;
+    Float_t p0, p1, p2;
+    p0 = 1;
+    p1 = -17.4857;
+    p2 = 2.98887;
+    return p0 * TMath::Exp(-(1. / 2.) * TMath::Power(((y - p1) / p2), 2));
+  }
+
+  //-------------------------------------------------------------------------//
+  static Double_t V2Psipp5TeV(const Double_t* /*dummy*/, const Double_t* /*dummy*/)
+  {
+    // jpsi v2
+    return 0.;
+  }
+
+  //-------------------------------------------------------------------------//
+  static Int_t IpPsipp5TeV(TRandom*)
+  {
+    return 100443;
+  }
+
+ private:
+  GeneratorParam* paramPsi = nullptr;
+};
+
 class O2_GeneratorParamJpsiPbPb5TeV : public GeneratorTGenerator
 {
 
@@ -815,9 +961,9 @@ FairGenerator* GeneratorCocktailPromptCharmoniaToMuonEvtGen_pp5TeV()
 
   auto genCocktailEvtGen = new o2::eventgen::GeneratorEvtGen<GeneratorCocktail>();
 
-  auto genJpsi = new o2::eventgen::O2_GeneratorParamJpsiFwdY;
+  auto genJpsi = new o2::eventgen::O2_GeneratorParamJpsipp5TeV;
   genJpsi->SetNSignalPerEvent(1); // 1 J/psi generated per event by GeneratorParam
-  auto genPsi = new o2::eventgen::O2_GeneratorParamPsiFwdY;
+  auto genPsi = new o2::eventgen::O2_GeneratorParamPsipp5TeV;
   genPsi->SetNSignalPerEvent(1);               // 1 Psi(2S) generated per event by GeneratorParam
   genCocktailEvtGen->AddGenerator(genJpsi, 1); // add J/psi generator
   genCocktailEvtGen->AddGenerator(genPsi, 1);  // add Psi(2S) generator