AliPythia* AliPythia::fgAliPythia=NULL;
-AliPythia::AliPythia()
+AliPythia::AliPythia():
+ fProcess(kPyMb),
+ fEcms(0.),
+ fStrucFunc(kCTEQ5L),
+ fXJet(0.),
+ fYJet(0.),
+ fGlauber(0),
+ fQuenchingWeights(0)
{
// Default Constructor
//
fQuenchingWeights = 0;
}
+AliPythia::AliPythia(const AliPythia& pythia):
+ fProcess(kPyMb),
+ fEcms(0.),
+ fStrucFunc(kCTEQ5L),
+ fXJet(0.),
+ fYJet(0.),
+ fGlauber(0),
+ fQuenchingWeights(0)
+{
+ // Copy Constructor
+ pythia.Copy(*this);
+}
+
void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfunc)
{
// Initialise the process to generate
SetMDCY(Pycomp(3312),1,0);
SetMDCY(Pycomp(3322),1,0);
SetMDCY(Pycomp(3334),1,0);
- // select structure function
+ // Select structure function
SetMSTP(52,2);
SetMSTP(51,strucfunc);
+ // Particles produced in string fragmentation point directly to either of the two endpoints
+ // of the string (depending in the side they were generated from).
+ SetMSTU(16,2);
+
//
// Pythia initialisation for selected processes//
//
SetMSTP(88,2);
// (D=1)see can be used to form baryons (BARYON JUNCTION)
SetMSTJ(1,1);
- SetMSTP(51,kCTEQ5L);// CTEQ 5L ! CTEQ5L pdf
- SetMSTP(81,1); // Multiple Interactions ON
- SetMSTP(82,4); // Double Gaussian Model
- SetPARP(82,1.8); // [GeV] PT_min at Ref. energy
- SetPARP(89,1000.); // [GeV] Ref. energy
- SetPARP(90,0.16); // 2*epsilon (exponent in power law)
- SetPARP(83,0.5); // Core density in proton matter dist. (def.value)
- SetPARP(84,0.5); // Core radius
- SetPARP(85,0.33); // Regulates gluon prod. mechanism
- SetPARP(86,0.66); // Regulates gluon prod. mechanism
- SetPARP(67,1); // Regulate gluon prod. mechanism
+ AtlasTuning();
break;
case kPyCharm:
SetMSEL(4);
// heavy quark masses
SetPMAS(4,1,1.2);
- SetMSTU(16,2);
//
// primordial pT
SetMSTP(91,1);
case kPyBeauty:
SetMSEL(5);
SetPMAS(5,1,4.75);
- SetMSTU(16,2);
break;
case kPyJpsi:
SetMSEL(0);
SetMSUB(94,1); // double diffraction
SetMSUB(95,1); // low pt production
-//
-// ATLAS Tuning
-//
-
- SetMSTP(51, kCTEQ5L); // CTEQ5L pdf
- SetMSTP(81,1); // Multiple Interactions ON
- SetMSTP(82,4); // Double Gaussian Model
-
- SetPARP(82,1.8); // [GeV] PT_min at Ref. energy
- SetPARP(89,1000.); // [GeV] Ref. energy
- SetPARP(90,0.16); // 2*epsilon (exponent in power law)
- SetPARP(83,0.5); // Core density in proton matter distribution (def.value)
- SetPARP(84,0.5); // Core radius
- SetPARP(85,0.33); // Regulates gluon prod. mechanism
- SetPARP(86,0.66); // Regulates gluon prod. mechanism
- SetPARP(67,1); // Regulates Initial State Radiation
+ AtlasTuning();
break;
case kPyMbNonDiffr:
// Minimum Bias pp-Collisions
SetMSEL(0);
SetMSUB(95,1); // low pt production
-//
-// ATLAS Tuning
-//
-
- SetMSTP(51,kCTEQ5L); // CTEQ5L pdf
- SetMSTP(81,1); // Multiple Interactions ON
- SetMSTP(82,4); // Double Gaussian Model
-
- SetPARP(82,1.8); // [GeV] PT_min at Ref. energy
- SetPARP(89,1000.); // [GeV] Ref. energy
- SetPARP(90,0.16); // 2*epsilon (exponent in power law)
- SetPARP(83,0.5); // Core density in proton matter distribution (def.value)
- SetPARP(84,0.5); // Core radius
- SetPARP(85,0.33); // Regulates gluon prod. mechanism
- SetPARP(86,0.66); // Regulates gluon prod. mechanism
- SetPARP(67,1); // Regulates Initial State Radiation
+ AtlasTuning();
+ break;
+ case kPyMbMSEL1:
+ ConfigHeavyFlavor();
+// Intrinsic <kT^2>
+ SetMSTP(91,1);// Width (1=gaussian) primordial kT dist. inside hadrons
+ SetPARP(91,1.); // <kT^2> = PARP(91,1.)^2
+ SetPARP(93,5.); // Upper cut-off
+// Set Q-quark mass
+ SetPMAS(4,1,1.2); // Charm quark mass
+ SetPMAS(5,1,4.78); // Beauty quark mass
+ SetPARP(71,4.); // Defaut value
+// Atlas Tuning
+ AtlasTuning();
break;
case kPyJets:
//
break;
case kPyCharmPbPbMNR:
case kPyD0PbPbMNR:
- // Tuning of Pythia parameters aimed to get a resonable agreement
- // between with the NLO calculation by Mangano, Nason, Ridolfi for the
- // c-cbar single inclusive and double differential distributions.
- // This parameter settings are meant to work with Pb-Pb collisions
- // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
- // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
- // has to be set to 2.1GeV. Example in ConfigCharmPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
- // QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
-
- // Intrinsic <kT>
- SetMSTP(91,1);
- SetPARP(91,1.304);
- SetPARP(93,6.52);
-
- // Set c-quark mass
- SetPMAS(4,1,1.2);
-
- break;
case kPyDPlusPbPbMNR:
+ case kPyDPlusStrangePbPbMNR:
// Tuning of Pythia parameters aimed to get a resonable agreement
// between with the NLO calculation by Mangano, Nason, Ridolfi for the
// c-cbar single inclusive and double differential distributions.
// (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
// To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
// has to be set to 2.1GeV. Example in ConfigCharmPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
- // QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
-
+ ConfigHeavyFlavor();
// Intrinsic <kT>
SetMSTP(91,1);
SetPARP(91,1.304);
SetPARP(93,6.52);
-
// Set c-quark mass
SetPMAS(4,1,1.2);
-
break;
case kPyCharmpPbMNR:
case kPyD0pPbMNR:
- // Tuning of Pythia parameters aimed to get a resonable agreement
- // between with the NLO calculation by Mangano, Nason, Ridolfi for the
- // c-cbar single inclusive and double differential distributions.
- // This parameter settings are meant to work with p-Pb collisions
- // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
- // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
- // has to be set to 2.1GeV. Example in ConfigCharmPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
- // QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
-
- // Intrinsic <kT>
- SetMSTP(91,1);
- SetPARP(91,1.16);
- SetPARP(93,5.8);
-
- // Set c-quark mass
- SetPMAS(4,1,1.2);
-
- break;
case kPyDPluspPbMNR:
+ case kPyDPlusStrangepPbMNR:
// Tuning of Pythia parameters aimed to get a resonable agreement
// between with the NLO calculation by Mangano, Nason, Ridolfi for the
// c-cbar single inclusive and double differential distributions.
// (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
// To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
// has to be set to 2.1GeV. Example in ConfigCharmPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
- // QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
-
+ ConfigHeavyFlavor();
// Intrinsic <kT>
- SetMSTP(91,1);
- SetPARP(91,1.16);
- SetPARP(93,5.8);
-
+ SetMSTP(91,1);
+ SetPARP(91,1.16);
+ SetPARP(93,5.8);
+
// Set c-quark mass
- SetPMAS(4,1,1.2);
-
+ SetPMAS(4,1,1.2);
break;
case kPyCharmppMNR:
case kPyD0ppMNR:
+ case kPyDPlusppMNR:
+ case kPyDPlusStrangeppMNR:
// Tuning of Pythia parameters aimed to get a resonable agreement
// between with the NLO calculation by Mangano, Nason, Ridolfi for the
// c-cbar single inclusive and double differential distributions.
// (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
// To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
// has to be set to 2.1GeV. Example in ConfigCharmPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
- // QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
-
+ ConfigHeavyFlavor();
// Intrinsic <kT^2>
- SetMSTP(91,1);
- SetPARP(91,1.);
- SetPARP(93,5.);
-
+ SetMSTP(91,1);
+ SetPARP(91,1.);
+ SetPARP(93,5.);
+
// Set c-quark mass
- SetPMAS(4,1,1.2);
-
+ SetPMAS(4,1,1.2);
break;
- case kPyDPlusppMNR:
+ case kPyCharmppMNRwmi:
// Tuning of Pythia parameters aimed to get a resonable agreement
// between with the NLO calculation by Mangano, Nason, Ridolfi for the
// c-cbar single inclusive and double differential distributions.
// This parameter settings are meant to work with pp collisions
- // (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
- // To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
- // has to be set to 2.1GeV. Example in ConfigCharmPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
- // QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
-
+ // and with kCTEQ5L PDFs.
+ // Added multiple interactions according to ATLAS tune settings.
+ // To get a "reasonable" agreement with MNR results, events have to be
+ // generated with the minimum ptHard (AliGenPythia::SetPtHard)
+ // set to 2.76 GeV.
+ // To get a "perfect" agreement with MNR results, events have to be
+ // generated in four ptHard bins with the following relative
+ // normalizations:
+ // 2.76-3 GeV: 25%
+ // 3-4 GeV: 40%
+ // 4-8 GeV: 29%
+ // >8 GeV: 6%
+ ConfigHeavyFlavor();
// Intrinsic <kT^2>
- SetMSTP(91,1);
- SetPARP(91,1.);
- SetPARP(93,5.);
+ SetMSTP(91,1);
+ SetPARP(91,1.);
+ SetPARP(93,5.);
// Set c-quark mass
- SetPMAS(4,1,1.2);
-
- break;
+ SetPMAS(4,1,1.2);
+ AtlasTuning();
+ break;
case kPyBeautyPbPbMNR:
// Tuning of Pythia parameters aimed to get a resonable agreement
// between with the NLO calculation by Mangano, Nason, Ridolfi for the
// (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
// To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
// has to be set to 2.75GeV. Example in ConfigBeautyPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
+ ConfigHeavyFlavor();
// QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
- SetPARP(67,1.0);
- SetPARP(71,1.0);
-
+ SetPARP(67,1.0);
+ SetPARP(71,1.0);
// Intrinsic <kT>
- SetMSTP(91,1);
- SetPARP(91,2.035);
- SetPARP(93,10.17);
-
+ SetMSTP(91,1);
+ SetPARP(91,2.035);
+ SetPARP(93,10.17);
// Set b-quark mass
- SetPMAS(5,1,4.75);
-
+ SetPMAS(5,1,4.75);
break;
case kPyBeautypPbMNR:
// Tuning of Pythia parameters aimed to get a resonable agreement
// (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
// To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
// has to be set to 2.75GeV. Example in ConfigBeautyPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
+ ConfigHeavyFlavor();
// QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
- SetPARP(67,1.0);
- SetPARP(71,1.0);
-
+ SetPARP(67,1.0);
+ SetPARP(71,1.0);
// Intrinsic <kT>
- SetMSTP(91,1);
- SetPARP(91,1.60);
- SetPARP(93,8.00);
-
+ SetMSTP(91,1);
+ SetPARP(91,1.60);
+ SetPARP(93,8.00);
// Set b-quark mass
- SetPMAS(5,1,4.75);
-
+ SetPMAS(5,1,4.75);
break;
case kPyBeautyppMNR:
// Tuning of Pythia parameters aimed to get a resonable agreement
// (AliGenPythia::SetNuclei) and with kCTEQ4L PDFs.
// To get a good agreement the minimum ptHard (AliGenPythia::SetPtHard)
// has to be set to 2.75GeV. Example in ConfigBeautyPPR.C.
-
- // All QCD processes
- SetMSEL(1);
-
- // No multiple interactions
- SetMSTP(81,0);
- SetPARP(81,0.0);
- SetPARP(82,0.0);
-
- // Initial/final parton shower on (Pythia default)
- SetMSTP(61,1);
- SetMSTP(71,1);
-
- // 2nd order alpha_s
- SetMSTP(2,2);
-
+ ConfigHeavyFlavor();
// QCD scales
- SetMSTP(32,2);
- SetPARP(34,1.0);
- SetPARP(67,1.0);
- SetPARP(71,1.0);
-
- // Intrinsic <kT>
- SetMSTP(91,1);
- SetPARP(91,1.);
- SetPARP(93,5.);
+ SetPARP(67,1.0);
+ SetPARP(71,1.0);
+
+ // Intrinsic <kT>
+ SetMSTP(91,1);
+ SetPARP(91,1.);
+ SetPARP(93,5.);
+
+ // Set b-quark mass
+ SetPMAS(5,1,4.75);
+ break;
+ case kPyBeautyppMNRwmi:
+ // Tuning of Pythia parameters aimed to get a resonable agreement
+ // between with the NLO calculation by Mangano, Nason, Ridolfi for the
+ // b-bbar single inclusive and double differential distributions.
+ // This parameter settings are meant to work with pp collisions
+ // and with kCTEQ5L PDFs.
+ // Added multiple interactions according to ATLAS tune settings.
+ // To get a "reasonable" agreement with MNR results, events have to be
+ // generated with the minimum ptHard (AliGenPythia::SetPtHard)
+ // set to 2.76 GeV.
+ // To get a "perfect" agreement with MNR results, events have to be
+ // generated in four ptHard bins with the following relative
+ // normalizations:
+ // 2.76-4 GeV: 5%
+ // 4-6 GeV: 31%
+ // 6-8 GeV: 28%
+ // >8 GeV: 36%
+ ConfigHeavyFlavor();
+ // QCD scales
+ SetPARP(67,1.0);
+ SetPARP(71,1.0);
+
+ // Intrinsic <kT>
+ SetMSTP(91,1);
+ SetPARP(91,1.);
+ SetPARP(93,5.);
// Set b-quark mass
- SetPMAS(5,1,4.75);
+ SetPMAS(5,1,4.75);
- break;
-
+ AtlasTuning();
+ break;
case kPyW:
//Inclusive production of W+/-
}
+void AliPythia::ConfigHeavyFlavor()
+{
+ //
+ // Default configuration for Heavy Flavor production
+ //
+ // All QCD processes
+ //
+ SetMSEL(1);
+
+ // No multiple interactions
+ SetMSTP(81,0);
+ // Initial/final parton shower on (Pythia default)
+ SetMSTP(61,1);
+ SetMSTP(71,1);
+
+ // 2nd order alpha_s
+ SetMSTP(2,2);
+
+ // QCD scales
+ SetMSTP(32,2);
+ SetPARP(34,1.0);
+}
+
+void AliPythia::AtlasTuning()
+{
+ //
+ // Configuration for the ATLAS tuning
+ SetMSTP(51, kCTEQ5L); // CTEQ5L pdf
+ SetMSTP(81,1); // Multiple Interactions ON
+ SetMSTP(82,4); // Double Gaussian Model
+ SetPARP(82,1.8); // [GeV] PT_min at Ref. energy
+ SetPARP(89,1000.); // [GeV] Ref. energy
+ SetPARP(90,0.16); // 2*epsilon (exponent in power law)
+ SetPARP(83,0.5); // Core density in proton matter distribution (def.value)
+ SetPARP(84,0.5); // Core radius
+ SetPARP(85,0.33); // Regulates gluon prod. mechanism
+ SetPARP(86,0.66); // Regulates gluon prod. mechanism
+ SetPARP(67,1); // Regulates Initial State Radiation
+}
+
+AliPythia& AliPythia::operator=(const AliPythia& rhs)
+{
+// Assignment operator
+ rhs.Copy(*this);
+ return *this;
+}
+ void AliPythia::Copy(TObject&) const
+{
+ //
+ // Copy
+ //
+ Fatal("Copy","Not implemented!\n");
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff