+
/**************************************************************************
* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
* *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.1 2003/03/15 15:00:48 morsch
-Classed imported from EVGEN.
-
-Revision 1.28 2002/12/09 08:22:56 morsch
-UA1 jet finder (Pycell) for software triggering added.
-
-Revision 1.27 2002/11/15 00:39:37 morsch
-- Correct initialisation of sRandom.
-- QCD Jets with initial and final state gluon radiation is default
-- pt kick for jets default
-- Interface to Pyclus added.
-
-Revision 1.26 2002/11/14 00:37:32 morsch
-Warning message for kPyJets added.
-
-Revision 1.25 2002/10/14 14:55:35 hristov
-Merging the VirtualMC branch to the main development branch (HEAD)
-
-Revision 1.20.6.1 2002/06/10 14:57:41 hristov
-Merged with v3-08-02
-
-Revision 1.24 2002/05/22 13:22:53 morsch
-Process kPyMbNonDiffr added.
-
-Revision 1.23 2002/05/06 07:17:29 morsch
-Pyr gives random number r in interval 0 < r < 1.
-
-Revision 1.22 2002/04/26 10:28:48 morsch
-Option kPyBeautyPbMNR added (N. Carrer).
-
-Revision 1.21 2002/03/25 14:46:16 morsch
-Case kPyD0PbMNR added (N. Carrer).
-
-Revision 1.20 2002/03/03 13:48:50 morsch
-Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR
-NLO calculations (Nicola Carrer).
-
-Revision 1.19 2002/02/20 08:52:20 morsch
-Correct documentation of SetNuclei method.
-
-Revision 1.18 2002/02/07 10:43:06 morsch
-Tuned pp-min.bias settings (M.Monteno, R.Ugoccioni and N.Carrer)
-
-Revision 1.17 2001/12/19 15:40:43 morsch
-For kPyJets enforce simple jet topology, i.e no initial or final state
-gluon radiation and no primordial pT.
-
-Revision 1.16 2001/10/12 11:13:59 morsch
-Missing break statements added (thanks to Nicola Carrer)
-
-Revision 1.15 2001/03/27 10:54:50 morsch
-Add ResetDecayTable() and SsetDecayTable() methods.
-
-Revision 1.14 2001/03/09 13:03:40 morsch
-Process_t and Struc_Func_t moved to AliPythia.h
-
-Revision 1.13 2000/12/18 08:55:35 morsch
-Make AliPythia dependent generartors work with new scheme of random number generation
-
-Revision 1.12 2000/11/30 07:12:50 alibrary
-Introducing new Rndm and QA classes
-
-Revision 1.11 2000/10/20 06:30:06 fca
-Use version 0 to avoid streamer generation
-
-Revision 1.10 2000/10/06 14:18:44 morsch
-Upper cut of prim. pT distribution set to 5. GeV
-
-Revision 1.9 2000/09/18 10:41:35 morsch
-Add possibility to use nuclear structure functions from PDF library V8.
-
-Revision 1.8 2000/09/06 14:26:24 morsch
-Decayer functionality of AliPythia has been moved to AliDecayerPythia.
-Class is now a singleton.
-
-Revision 1.7 2000/06/09 20:34:50 morsch
-All coding rule violations except RS3 corrected
-
-Revision 1.6 1999/11/09 07:38:48 fca
-Changes for compatibility with version 2.23 of ROOT
-
-Revision 1.5 1999/11/03 17:43:20 fca
-New version from G.Martinez & A.Morsch
-
-Revision 1.4 1999/09/29 09:24:14 fca
-Introduction of the Copyright and cvs Log
-
-*/
-
+/* $Id$ */
#include "AliPythia.h"
+#include "AliPythiaRndm.h"
+#include "AliFastGlauber.h"
+#include "AliQuenchingWeights.h"
+#include "TVector3.h"
+#include "PyquenCommon.h"
ClassImp(AliPythia)
#ifndef WIN32
# define pyclus pyclus_
# define pycell pycell_
+# define pyshow pyshow_
+# define pyrobo pyrobo_
+# define pyquen pyquen_
+# define pyevnw pyevnw_
# define type_of_call
#else
# define pyclus PYCLUS
# define pycell PYCELL
+# define pyrobo PYROBO
+# define pyquen PYQUEN
+# define pyevnw PYEVNW
# define type_of_call _stdcall
#endif
extern "C" void type_of_call pyclus(Int_t & );
extern "C" void type_of_call pycell(Int_t & );
+extern "C" void type_of_call pyshow(Int_t &, Int_t &, Double_t &);
+extern "C" void type_of_call pyrobo(Int_t &, Int_t &, Double_t &, Double_t &, Double_t &, Double_t &, Double_t &);
+extern "C" void type_of_call pyquen(Double_t &, Int_t &, Double_t &);
+extern "C" void type_of_call pyevnw(){;}
//_____________________________________________________________________________
AliPythia* AliPythia::fgAliPythia=NULL;
-AliPythia::AliPythia()
+AliPythia::AliPythia():
+ fProcess(kPyMb),
+ fEcms(0.),
+ fStrucFunc(kCTEQ5L),
+ fXJet(0.),
+ fYJet(0.),
+ fNGmax(30),
+ fZmax(0.97),
+ fGlauber(0),
+ fQuenchingWeights(0)
{
// Default Constructor
//
// Set random number
- if (!sRandom) sRandom=fRandom;
+ if (!AliPythiaRndm::GetPythiaRandom())
+ AliPythiaRndm::SetPythiaRandom(GetRandom());
+ fGlauber = 0;
+ fQuenchingWeights = 0;
+}
+AliPythia::AliPythia(const AliPythia& pythia):
+ TPythia6(pythia),
+ AliRndm(pythia),
+ fProcess(kPyMb),
+ fEcms(0.),
+ fStrucFunc(kCTEQ5L),
+ fXJet(0.),
+ fYJet(0.),
+ fNGmax(30),
+ fZmax(0.97),
+ 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
- if (!sRandom) sRandom = gRandom;
+ if (!AliPythiaRndm::GetPythiaRandom())
+ AliPythiaRndm::SetPythiaRandom(GetRandom());
fProcess = process;
fEcms = energy;
fStrucFunc = strucfunc;
-// don't decay p0
- SetMDCY(Pycomp(111),1,0);
-// select structure function
+//...Switch off decay of pi0, K0S, Lambda, Sigma+-, Xi0-, Omega-.
+ SetMDCY(Pycomp(111) ,1,0);
+ SetMDCY(Pycomp(310) ,1,0);
+ SetMDCY(Pycomp(3122),1,0);
+ SetMDCY(Pycomp(3112),1,0);
+ SetMDCY(Pycomp(3212),1,0);
+ SetMDCY(Pycomp(3222),1,0);
+ SetMDCY(Pycomp(3312),1,0);
+ SetMDCY(Pycomp(3322),1,0);
+ SetMDCY(Pycomp(3334),1,0);
+ // 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//
//
// select charm production
switch (process)
{
+ case kPyOldUEQ2ordered: //Old underlying events with Q2 ordered QCD processes
+// Multiple interactions on.
+ SetMSTP(81,1);
+// Double Gaussian matter distribution.
+ SetMSTP(82,4);
+ SetPARP(83,0.5);
+ SetPARP(84,0.4);
+// pT0.
+ SetPARP(82,2.0);
+// Reference energy for pT0 and energy rescaling pace.
+ SetPARP(89,1800);
+ SetPARP(90,0.25);
+// String drawing almost completely minimizes string length.
+ SetPARP(85,0.9);
+ SetPARP(86,0.95);
+// ISR and FSR activity.
+ SetPARP(67,4);
+ SetPARP(71,4);
+// Lambda_FSR scale.
+ SetPARJ(81,0.29);
+ break;
+ case kPyOldUEQ2ordered2:
+// Old underlying events with Q2 ordered QCD processes
+// Multiple interactions on.
+ SetMSTP(81,1);
+// Double Gaussian matter distribution.
+ SetMSTP(82,4);
+ SetPARP(83,0.5);
+ SetPARP(84,0.4);
+// pT0.
+ SetPARP(82,2.0);
+// Reference energy for pT0 and energy rescaling pace.
+ SetPARP(89,1800);
+ SetPARP(90,0.16); // here is the difference with kPyOldUEQ2ordered
+// String drawing almost completely minimizes string length.
+ SetPARP(85,0.9);
+ SetPARP(86,0.95);
+// ISR and FSR activity.
+ SetPARP(67,4);
+ SetPARP(71,4);
+// Lambda_FSR scale.
+ SetPARJ(81,0.29);
+ break;
+ case kPyOldPopcorn:
+// Old production mechanism: Old Popcorn
+ SetMSEL(1);
+ SetMSTJ(12,3);
+// (D=2) Like MSTJ(12)=2 but added prod ofthe 1er rank baryon
+ SetMSTP(88,2);
+// (D=1)see can be used to form baryons (BARYON JUNCTION)
+ SetMSTJ(1,1);
+ 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);
//
// select Pythia min. bias model
SetMSEL(0);
- SetMSUB(92,1); // single diffraction AB-->XB
- SetMSUB(93,1); // single diffraction AB-->AX
- SetMSUB(94,1); // double diffraction
- SetMSUB(95,1); // low pt production
- SetMSTP(81,1); // multiple interactions switched on
- SetMSTP(82,3); // model with varying impact param. & a single Gaussian
- SetPARP(82,3.47); // set value pT_0 for turn-off of the cross section of
- // multiple interaction at a reference energy = 14000 GeV
- SetPARP(89,14000.); // reference energy for the above parameter
- SetPARP(90,0.174); // set exponent for energy dependence of pT_0
+ SetMSUB(92,1); // single diffraction AB-->XB
+ SetMSUB(93,1); // single diffraction AB-->AX
+ SetMSUB(94,1); // double diffraction
+ SetMSUB(95,1); // low pt production
+
+ AtlasTuning();
+ break;
+ case kPyMbDefault:
+// Minimum Bias pp-Collisions
+//
+//
+// select Pythia min. bias model
+ SetMSEL(0);
+ SetMSUB(92,1); // single diffraction AB-->XB
+ SetMSUB(93,1); // single diffraction AB-->AX
+ SetMSUB(94,1); // double diffraction
+ SetMSUB(95,1); // low pt production
+
+ break;
+ case kPyLhwgMb:
+// Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120
+// -> Pythia 6.3 or above is needed
+//
+ SetMSEL(0);
+ SetMSUB(92,1); // single diffraction AB-->XB
+ SetMSUB(93,1); // single diffraction AB-->AX
+ SetMSUB(94,1); // double diffraction
+ SetMSUB(95,1); // low pt production
+
+ SetMSTP(51,kCTEQ6ll); // CTEQ6ll pdf
+ SetMSTP(52,2);
+ SetMSTP(68,1);
+ SetMSTP(70,2);
+ SetMSTP(81,1); // Multiple Interactions ON
+ SetMSTP(82,4); // Double Gaussian Model
+ SetMSTP(88,1);
+
+ SetPARP(82,2.3); // [GeV] PT_min at Ref. energy
+ SetPARP(83,0.5); // Core density in proton matter distribution (def.value)
+ SetPARP(84,0.5); // Core radius
+ SetPARP(85,0.9); // Regulates gluon prod. mechanism
+ SetPARP(90,0.2); // 2*epsilon (exponent in power law)
+
+ break;
case kPyMbNonDiffr:
// Minimum Bias pp-Collisions
//
//
// select Pythia min. bias model
SetMSEL(0);
- SetMSUB(95,1); // low pt production
- SetMSTP(81,1); // multiple interactions switched on
- SetMSTP(82,3); // model with varying impact param. & a single Gaussian
- SetPARP(82,3.47); // set value pT_0 for turn-off of the cross section of
- // multiple interaction at a reference energy = 14000 GeV
- SetPARP(89,14000.); // reference energy for the above parameter
- SetPARP(90,0.174); // set exponent for energy dependence of pT_0
-
+ SetMSUB(95,1); // low pt production
+
+ 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:
//
// QCD Jets
//
SetMSEL(1);
- break;
+ // Pythia Tune A (CDF)
+ //
+ SetPARP(67,2.5); // Regulates Initial State Radiation (value from best fit to D0 dijet analysis)
+ SetMSTP(82,4); // Double Gaussian Model
+ SetPARP(82,2.0); // [GeV] PT_min at Ref. energy
+ SetPARP(84,0.4); // Core radius
+ SetPARP(85,0.90) ; // Regulates gluon prod. mechanism
+ SetPARP(86,0.95); // Regulates gluon prod. mechanism
+ SetPARP(89,1800.); // [GeV] Ref. energy
+ SetPARP(90,0.25); // 2*epsilon (exponent in power law)
+ break;
case kPyDirectGamma:
SetMSEL(10);
break;
case kPyCharmPbPbMNR:
case kPyD0PbPbMNR:
+ 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:
+ 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 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
+ // 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.);
+
+ // Set c-quark mass
+ 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);
+
+ AtlasTuning();
+ break;
+ case kPyW:
+
+ //Inclusive production of W+/-
+ SetMSEL(0);
+ //f fbar -> W+
+ SetMSUB(2,1);
+ // //f fbar -> g W+
+ // SetMSUB(16,1);
+ // //f fbar -> gamma W+
+ // SetMSUB(20,1);
+ // //f g -> f W+
+ // SetMSUB(31,1);
+ // //f gamma -> f W+
+ // SetMSUB(36,1);
+
+ // Initial/final parton shower on (Pythia default)
+ // With parton showers on we are generating "W inclusive process"
+ SetMSTP(61,1); //Initial QCD & QED showers on
+ SetMSTP(71,1); //Final QCD & QED showers on
+
+ break;
+
+ case kPyZ:
+
+ //Inclusive production of Z
+ SetMSEL(0);
+ //f fbar -> Z/gamma
+ SetMSUB(1,1);
+
+ // // f fbar -> g Z/gamma
+ // SetMSUB(15,1);
+ // // f fbar -> gamma Z/gamma
+ // SetMSUB(19,1);
+ // // f g -> f Z/gamma
+ // SetMSUB(30,1);
+ // // f gamma -> f Z/gamma
+ // SetMSUB(35,1);
+
+ //only Z included, not gamma
+ SetMSTP(43,2);
+
+ // Initial/final parton shower on (Pythia default)
+ // With parton showers on we are generating "Z inclusive process"
+ SetMSTP(61,1); //Initial QCD & QED showers on
+ SetMSTP(71,1); //Final QCD & QED showers on
+
+ break;
- break;
}
//
// Initialize PYTHIA
SetMSTP(41,1); // all resonance decays switched on
-
Initialize("CMS","p","p",fEcms);
-
+
}
Int_t AliPythia::CheckedLuComp(Int_t kf)
{
// Print list of particl properties
Int_t np = 0;
-
+ char* name = new char[16];
for (Int_t kf=0; kf<1000000; kf++) {
for (Int_t c = 1; c > -2; c-=2) {
-
Int_t kc = Pycomp(c*kf);
if (kc) {
Float_t mass = GetPMAS(kc,1);
Float_t width = GetPMAS(kc,2);
Float_t tau = GetPMAS(kc,4);
-
- char* name = new char[8];
+
Pyname(kf,name);
np++;
pycell(njet);
}
+void AliPythia::Pyshow(Int_t ip1, Int_t ip2, Double_t qmax)
+{
+// Call Pythia jet reconstruction algorithm
+//
+ pyshow(ip1, ip2, qmax);
+}
+
+void AliPythia::Pyrobo(Int_t imi, Int_t ima, Double_t the, Double_t phi, Double_t bex, Double_t bey, Double_t bez)
+{
+ pyrobo(imi, ima, the, phi, bex, bey, bez);
+}
-#ifndef WIN32
-#define pyr pyr_
-#define pyrset pyrset_
-#define pyrget pyrget_
-#define pyclus pyclus_
-#define pycell pycell_
-#else
-#define pyr PYR
-#define pyrset PYRSET
-#define pyrget PYRGET
-#define pyclus PYCLUS
-#define pycell PYCELL
-#endif
-extern "C" {
- Double_t pyr(Int_t*)
+void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod, Float_t zmax, Int_t ngmax)
{
- Float_t r;
- do r=sRandom->Rndm(); while(0 >= r || r >= 1);
- return r;
+// Initializes
+// (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann
+// (2) The nuclear geometry using the Glauber Model
+//
+
+ fGlauber = new AliFastGlauber();
+ fGlauber->Init(2);
+ fGlauber->SetCentralityClass(cMin, cMax);
+
+ fQuenchingWeights = new AliQuenchingWeights();
+ fQuenchingWeights->InitMult();
+ fQuenchingWeights->SetK(k);
+ fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod));
+ fNGmax = ngmax;
+ fZmax = zmax;
+
}
- void pyrset(Int_t*,Int_t*) {}
- void pyrget(Int_t*,Int_t*) {}
+
+
+void AliPythia::Quench()
+{
+//
+//
+// Simple Jet Quenching routine:
+// =============================
+// The jet formed by all final state partons radiated by the parton created
+// in the hard collisions is quenched by a factor (1-z) using light cone variables in
+// the initial parton reference frame:
+// (E + p_z)new = (1-z) (E + p_z)old
+//
+//
+//
+//
+// The lost momentum is first balanced by one gluon with virtuality > 0.
+// Subsequently the gluon splits to yield two gluons with E = p.
+//
+//
+//
+ static Float_t eMean = 0.;
+ static Int_t icall = 0;
+
+ Double_t p0[4][5];
+ Double_t p1[4][5];
+ Double_t p2[4][5];
+ Int_t klast[4] = {-1, -1, -1, -1};
+
+ Int_t numpart = fPyjets->N;
+ Double_t px = 0., py = 0., pz = 0., e = 0., m = 0., p = 0., pt = 0., theta = 0., phi = 0.;
+ Double_t pxq[4], pyq[4], pzq[4], eq[4], yq[4], mq[4], pq[4], phiq[4], thetaq[4], ptq[4];
+ Bool_t quenched[4];
+ Double_t wjtKick[4];
+ Int_t nGluon[4];
+ Int_t qPdg[4];
+ Int_t imo, kst, pdg;
+
+//
+// Sore information about Primary partons
+//
+// j =
+// 0, 1 partons from hard scattering
+// 2, 3 partons from initial state radiation
+//
+ for (Int_t i = 2; i <= 7; i++) {
+ Int_t j = 0;
+ // Skip gluons that participate in hard scattering
+ if (i == 4 || i == 5) continue;
+ // Gluons from hard Scattering
+ if (i == 6 || i == 7) {
+ j = i - 6;
+ pxq[j] = fPyjets->P[0][i];
+ pyq[j] = fPyjets->P[1][i];
+ pzq[j] = fPyjets->P[2][i];
+ eq[j] = fPyjets->P[3][i];
+ mq[j] = fPyjets->P[4][i];
+ } else {
+ // Gluons from initial state radiation
+ //
+ // Obtain 4-momentum vector from difference between original parton and parton after gluon
+ // radiation. Energy is calculated independently because initial state radition does not
+ // conserve strictly momentum and energy for each partonic system independently.
+ //
+ // Not very clean. Should be improved !
+ //
+ //
+ j = i;
+ pxq[j] = fPyjets->P[0][i] - fPyjets->P[0][i+2];
+ pyq[j] = fPyjets->P[1][i] - fPyjets->P[1][i+2];
+ pzq[j] = fPyjets->P[2][i] - fPyjets->P[2][i+2];
+ mq[j] = fPyjets->P[4][i];
+ eq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j] + mq[j] * mq[j]);
+ }
+//
+// Calculate some kinematic variables
+//
+ yq[j] = 0.5 * TMath::Log((eq[j] + pzq[j] + 1.e-14) / (eq[j] - pzq[j] + 1.e-14));
+ pq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j] + pzq[j] * pzq[j]);
+ phiq[j] = TMath::Pi()+TMath::ATan2(-pyq[j], -pxq[j]);
+ ptq[j] = TMath::Sqrt(pxq[j] * pxq[j] + pyq[j] * pyq[j]);
+ thetaq[j] = TMath::ATan2(ptq[j], pzq[j]);
+ qPdg[j] = fPyjets->K[1][i];
+ }
+
+ Double_t int0[4];
+ Double_t int1[4];
+
+ fGlauber->GetI0I1ForPythiaAndXY(4, phiq, int0, int1, fXJet, fYJet, 15.);
+
+ for (Int_t j = 0; j < 4; j++) {
+ //
+ // Quench only central jets and with E > 10.
+ //
+
+
+ Int_t itype = (qPdg[j] == 21) ? 2 : 1;
+ Double_t eloss = fQuenchingWeights->GetELossRandomKFast(itype, int0[j], int1[j], eq[j]);
+
+ if (TMath::Abs(yq[j]) > 2.5 || eq[j] < 10.) {
+ fZQuench[j] = 0.;
+ } else {
+ if (eq[j] > 40. && TMath::Abs(yq[j]) < 0.5) {
+ icall ++;
+ eMean += eloss;
+ }
+ //
+ // Extra pt
+ Double_t l = fQuenchingWeights->CalcLk(int0[j], int1[j]);
+ wjtKick[j] = TMath::Sqrt(l * fQuenchingWeights->CalcQk(int0[j], int1[j]));
+ //
+ // Fractional energy loss
+ fZQuench[j] = eloss / eq[j];
+ //
+ // Avoid complete loss
+ //
+ if (fZQuench[j] == 1.) fZQuench[j] = fZmax;
+ //
+ // Some debug printing
+
+
+// printf("Initial parton # %3d, Type %3d Energy %10.3f Phi %10.3f Length %10.3f Loss %10.3f Kick %10.3f Mean: %10.3f %10.3f\n",
+// j, itype, eq[j], phiq[j], l, eloss, wjtKick[j], eMean / Float_t(icall+1), yq[j]);
+
+// fZQuench[j] = 0.8;
+// while (fZQuench[j] >= 0.95) fZQuench[j] = gRandom->Exp(0.2);
+ }
+
+ quenched[j] = (fZQuench[j] > 0.01);
+ } // primary partons
+
+
+
+ Double_t pNew[1000][4];
+ Int_t kNew[1000];
+ Int_t icount = 0;
+ Double_t zquench[4];
+
+//
+// System Loop
+ for (Int_t isys = 0; isys < 4; isys++) {
+// Skip to next system if not quenched.
+ if (!quenched[isys]) continue;
+
+ nGluon[isys] = 1 + Int_t(fZQuench[isys] / (1. - fZQuench[isys]));
+ if (nGluon[isys] > fNGmax) nGluon[isys] = fNGmax;
+ zquench[isys] = 1. - TMath::Power(1. - fZQuench[isys], 1./Double_t(nGluon[isys]));
+ wjtKick[isys] = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys]));
+
+
+
+ Int_t igMin = -1;
+ Int_t igMax = -1;
+ Double_t pg[4] = {0., 0., 0., 0.};
+
+//
+// Loop on radiation events
+
+ for (Int_t iglu = 0; iglu < nGluon[isys]; iglu++) {
+ while (1) {
+ icount = 0;
+ for (Int_t k = 0; k < 4; k++)
+ {
+ p0[isys][k] = 0.;
+ p1[isys][k] = 0.;
+ p2[isys][k] = 0.;
+ }
+// Loop over partons
+ for (Int_t i = 0; i < numpart; i++)
+ {
+ imo = fPyjets->K[2][i];
+ kst = fPyjets->K[0][i];
+ pdg = fPyjets->K[1][i];
+
+
+
+// Quarks and gluons only
+ if (pdg != 21 && TMath::Abs(pdg) > 6) continue;
+// Particles from hard scattering only
+
+ if (imo > 8 && imo < 1000) imo = fPyjets->K[2][imo - 1];
+ Int_t imom = imo % 1000;
+ if ((isys == 0 || isys == 1) && ((imom != (isys + 7)))) continue;
+ if ((isys == 2 || isys == 3) && ((imom != (isys + 1)))) continue;
+
+
+// Skip comment lines
+ if (kst != 1 && kst != 2) continue;
+//
+// Parton kinematic
+ px = fPyjets->P[0][i];
+ py = fPyjets->P[1][i];
+ pz = fPyjets->P[2][i];
+ e = fPyjets->P[3][i];
+ m = fPyjets->P[4][i];
+ pt = TMath::Sqrt(px * px + py * py);
+ p = TMath::Sqrt(px * px + py * py + pz * pz);
+ phi = TMath::Pi() + TMath::ATan2(-py, -px);
+ theta = TMath::ATan2(pt, pz);
+
+//
+// Save 4-momentum sum for balancing
+ Int_t index = isys;
+
+ p0[index][0] += px;
+ p0[index][1] += py;
+ p0[index][2] += pz;
+ p0[index][3] += e;
+
+ klast[index] = i;
+
+//
+// Fractional energy loss
+ Double_t z = zquench[index];
+
+
+// Don't fully quench radiated gluons
+//
+ if (imo > 1000) {
+// This small factor makes sure that the gluons are not too close in phase space to avoid recombination
+//
+
+ z = 0.02;
+ }
+// printf("z: %d %f\n", imo, z);
+
+
+//
+
+ //
+ //
+ // Transform into frame in which initial parton is along z-axis
+ //
+ TVector3 v(px, py, pz);
+ v.RotateZ(-phiq[index]); v.RotateY(-thetaq[index]);
+ Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pl = v.Z();
+
+ Double_t jt = TMath::Sqrt(pxs * pxs + pys * pys);
+ Double_t mt2 = jt * jt + m * m;
+ Double_t zmax = 1.;
+ //
+ // Kinematic limit on z
+ //
+ if (m > 0.) zmax = 1. - m / TMath::Sqrt(m * m + jt * jt);
+ //
+ // Change light-cone kinematics rel. to initial parton
+ //
+ Double_t eppzOld = e + pl;
+ Double_t empzOld = e - pl;
+
+ Double_t eppzNew = (1. - z) * eppzOld;
+ Double_t empzNew = empzOld - mt2 * z / eppzOld;
+ Double_t eNew = 0.5 * (eppzNew + empzNew);
+ Double_t plNew = 0.5 * (eppzNew - empzNew);
+
+ Double_t jtNew;
+ //
+ // if mt very small (or sometimes even < 0 for numerical reasons) set it to 0
+ Double_t mt2New = eppzNew * empzNew;
+ if (mt2New < 1.e-8) mt2New = 0.;
+ if (z < zmax) {
+ if (m * m > mt2New) {
+ //
+ // This should not happen
+ //
+ Fatal("Quench()", "This should never happen %e %e %e!", m, eppzNew, empzNew);
+ jtNew = 0;
+ } else {
+ jtNew = TMath::Sqrt(mt2New - m * m);
+ }
+ } else {
+ // If pT is to small (probably a leading massive particle) we scale only the energy
+ // This can cause negative masses of the radiated gluon
+ // Let's hope for the best ...
+ jtNew = jt;
+ eNew = TMath::Sqrt(plNew * plNew + mt2);
+
+ }
+ //
+ // Calculate new px, py
+ //
+ Double_t pxNew = jtNew / jt * pxs;
+ Double_t pyNew = jtNew / jt * pys;
+
+// Double_t dpx = pxs - pxNew;
+// Double_t dpy = pys - pyNew;
+// Double_t dpz = pl - plNew;
+// Double_t de = e - eNew;
+// Double_t dmass2 = de * de - dpx * dpx - dpy * dpy - dpz * dpz;
+// printf("New mass (1) %e %e %e %e %e %e %e \n", dmass2, jt, jtNew, pl, plNew, e, eNew);
+// printf("New mass (2) %e %e \n", pxNew, pyNew);
+ //
+ // Rotate back
+ //
+ TVector3 w(pxNew, pyNew, plNew);
+ w.RotateY(thetaq[index]); w.RotateZ(phiq[index]);
+ pxNew = w.X(); pyNew = w.Y(); plNew = w.Z();
+
+ p1[index][0] += pxNew;
+ p1[index][1] += pyNew;
+ p1[index][2] += plNew;
+ p1[index][3] += eNew;
+ //
+ // Updated 4-momentum vectors
+ //
+ pNew[icount][0] = pxNew;
+ pNew[icount][1] = pyNew;
+ pNew[icount][2] = plNew;
+ pNew[icount][3] = eNew;
+ kNew[icount] = i;
+ icount++;
+ } // parton loop
+ //
+ // Check if there was phase-space for quenching
+ //
+
+ if (icount == 0) quenched[isys] = kFALSE;
+ if (!quenched[isys]) break;
+
+ for (Int_t j = 0; j < 4; j++)
+ {
+ p2[isys][j] = p0[isys][j] - p1[isys][j];
+ }
+ p2[isys][4] = p2[isys][3] * p2[isys][3] - p2[isys][0] * p2[isys][0] - p2[isys][1] * p2[isys][1] - p2[isys][2] * p2[isys][2];
+ if (p2[isys][4] > 0.) {
+ p2[isys][4] = TMath::Sqrt(p2[isys][4]);
+ break;
+ } else {
+ printf("Warning negative mass squared in system %d %f ! \n", isys, zquench[isys]);
+ printf("4-Momentum: %10.3e %10.3e %10.3e %10.3e %10.3e \n", p2[isys][0], p2[isys][1], p2[isys][2], p2[isys][3], p2[isys][4]);
+ if (p2[isys][4] < -0.01) {
+ printf("Negative mass squared !\n");
+ // Here we have to put the gluon back to mass shell
+ // This will lead to a small energy imbalance
+ p2[isys][4] = 0.;
+ p2[isys][3] = TMath::Sqrt(p2[isys][0] * p2[isys][0] + p2[isys][1] * p2[isys][1] + p2[isys][2] * p2[isys][2]);
+ break;
+ } else {
+ p2[isys][4] = 0.;
+ break;
+ }
+ }
+ /*
+ zHeavy *= 0.98;
+ printf("zHeavy lowered to %f\n", zHeavy);
+ if (zHeavy < 0.01) {
+ printf("No success ! \n");
+ icount = 0;
+ quenched[isys] = kFALSE;
+ break;
+ }
+ */
+ } // iteration on z (while)
+
+// Update event record
+ for (Int_t k = 0; k < icount; k++) {
+// printf("%6d %6d %10.3e %10.3e %10.3e %10.3e\n", k, kNew[k], pNew[k][0],pNew[k][1], pNew[k][2], pNew[k][3] );
+ fPyjets->P[0][kNew[k]] = pNew[k][0];
+ fPyjets->P[1][kNew[k]] = pNew[k][1];
+ fPyjets->P[2][kNew[k]] = pNew[k][2];
+ fPyjets->P[3][kNew[k]] = pNew[k][3];
+ }
+ //
+ // Add the gluons
+ //
+ Int_t ish = 0;
+ Int_t iGlu;
+ if (!quenched[isys]) continue;
+//
+// Last parton from shower i
+ Int_t in = klast[isys];
+//
+// Continue if no parton in shower i selected
+ if (in == -1) continue;
+//
+// If this is the second initial parton and it is behind the first move pointer by previous ish
+ if (isys == 1 && klast[1] > klast[0]) in += ish;
+//
+// Starting index
+
+// jmin = in - 1;
+// How many additional gluons will be generated
+ ish = 1;
+ if (p2[isys][4] > 0.05) ish = 2;
+//
+// Position of gluons
+ iGlu = numpart;
+ if (iglu == 0) igMin = iGlu;
+ igMax = iGlu;
+ numpart += ish;
+ (fPyjets->N) += ish;
+
+ if (ish == 1) {
+ fPyjets->P[0][iGlu] = p2[isys][0];
+ fPyjets->P[1][iGlu] = p2[isys][1];
+ fPyjets->P[2][iGlu] = p2[isys][2];
+ fPyjets->P[3][iGlu] = p2[isys][3];
+ fPyjets->P[4][iGlu] = p2[isys][4];
+
+ fPyjets->K[0][iGlu] = 1;
+ if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu] = 1;
+ fPyjets->K[1][iGlu] = 21;
+ fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000;
+ fPyjets->K[3][iGlu] = -1;
+ fPyjets->K[4][iGlu] = -1;
+
+ pg[0] += p2[isys][0];
+ pg[1] += p2[isys][1];
+ pg[2] += p2[isys][2];
+ pg[3] += p2[isys][3];
+ } else {
+ //
+ // Split gluon in rest frame.
+ //
+ Double_t bx = p2[isys][0] / p2[isys][3];
+ Double_t by = p2[isys][1] / p2[isys][3];
+ Double_t bz = p2[isys][2] / p2[isys][3];
+ Double_t pst = p2[isys][4] / 2.;
+ //
+ // Isotropic decay ????
+ Double_t cost = 2. * gRandom->Rndm() - 1.;
+ Double_t sint = TMath::Sqrt(1. - cost * cost);
+ Double_t phi = 2. * TMath::Pi() * gRandom->Rndm();
+
+ Double_t pz1 = pst * cost;
+ Double_t pz2 = -pst * cost;
+ Double_t pt1 = pst * sint;
+ Double_t pt2 = -pst * sint;
+ Double_t px1 = pt1 * TMath::Cos(phi);
+ Double_t py1 = pt1 * TMath::Sin(phi);
+ Double_t px2 = pt2 * TMath::Cos(phi);
+ Double_t py2 = pt2 * TMath::Sin(phi);
+
+ fPyjets->P[0][iGlu] = px1;
+ fPyjets->P[1][iGlu] = py1;
+ fPyjets->P[2][iGlu] = pz1;
+ fPyjets->P[3][iGlu] = pst;
+ fPyjets->P[4][iGlu] = 0.;
+
+ fPyjets->K[0][iGlu] = 1 ;
+ fPyjets->K[1][iGlu] = 21;
+ fPyjets->K[2][iGlu] = fPyjets->K[2][in] + 1000;
+ fPyjets->K[3][iGlu] = -1;
+ fPyjets->K[4][iGlu] = -1;
+
+ fPyjets->P[0][iGlu+1] = px2;
+ fPyjets->P[1][iGlu+1] = py2;
+ fPyjets->P[2][iGlu+1] = pz2;
+ fPyjets->P[3][iGlu+1] = pst;
+ fPyjets->P[4][iGlu+1] = 0.;
+
+ fPyjets->K[0][iGlu+1] = 1;
+ if (iglu == nGluon[isys] - 1) fPyjets->K[0][iGlu+1] = 1;
+ fPyjets->K[1][iGlu+1] = 21;
+ fPyjets->K[2][iGlu+1] = fPyjets->K[2][in] + 1000;
+ fPyjets->K[3][iGlu+1] = -1;
+ fPyjets->K[4][iGlu+1] = -1;
+ SetMSTU(1,0);
+ SetMSTU(2,0);
+ //
+ // Boost back
+ //
+ Pyrobo(iGlu + 1, iGlu + 2, 0., 0., bx, by, bz);
+ }
+/*
+ for (Int_t ig = iGlu; ig < iGlu+ish; ig++) {
+ Double_t px, py, pz;
+ px = fPyjets->P[0][ig];
+ py = fPyjets->P[1][ig];
+ pz = fPyjets->P[2][ig];
+ TVector3 v(px, py, pz);
+ v.RotateZ(-phiq[isys]);
+ v.RotateY(-thetaq[isys]);
+ Double_t pxs = v.X(); Double_t pys = v.Y(); Double_t pzs = v.Z();
+ Double_t r = AliPythiaRndm::GetPythiaRandom()->Rndm();
+ Double_t jtKick = 0.3 * TMath::Sqrt(-TMath::Log(r));
+ if (ish == 2) jtKick = wjtKick[i] * TMath::Sqrt(-TMath::Log(r)) / TMath::Sqrt(2.);
+ Double_t phiKick = 2. * TMath::Pi() * AliPythiaRndm::GetPythiaRandom()->Rndm();
+ pxs += jtKick * TMath::Cos(phiKick);
+ pys += jtKick * TMath::Sin(phiKick);
+ TVector3 w(pxs, pys, pzs);
+ w.RotateY(thetaq[isys]);
+ w.RotateZ(phiq[isys]);
+ fPyjets->P[0][ig] = w.X();
+ fPyjets->P[1][ig] = w.Y();
+ fPyjets->P[2][ig] = w.Z();
+ fPyjets->P[2][ig] = w.Mag();
+ }
+*/
+ } // kGluon
+
+
+ // Check energy conservation
+ Double_t pxs = 0.;
+ Double_t pys = 0.;
+ Double_t pzs = 0.;
+ Double_t es = 14000.;
+
+ for (Int_t i = 0; i < numpart; i++)
+ {
+ kst = fPyjets->K[0][i];
+ if (kst != 1 && kst != 2) continue;
+ pxs += fPyjets->P[0][i];
+ pys += fPyjets->P[1][i];
+ pzs += fPyjets->P[2][i];
+ es -= fPyjets->P[3][i];
+ }
+ if (TMath::Abs(pxs) > 1.e-2 ||
+ TMath::Abs(pys) > 1.e-2 ||
+ TMath::Abs(pzs) > 1.e-1) {
+ printf("%e %e %e %e\n", pxs, pys, pzs, es);
+// Fatal("Quench()", "4-Momentum non-conservation");
+ }
+
+ } // end quenching loop (systems)
+// Clean-up
+ for (Int_t i = 0; i < numpart; i++)
+ {
+ imo = fPyjets->K[2][i];
+ if (imo > 1000) {
+ fPyjets->K[2][i] = fPyjets->K[2][i] % 1000;
+ }
+ }
+// this->Pylist(1);
+} // end quench
+
+
+void AliPythia::Pyquen(Double_t a, Int_t ibf, Double_t b)
+{
+ // Igor Lokthine's quenching routine
+ // http://lokhtin.web.cern.ch/lokhtin/pyquen/pyquen.txt
+
+ pyquen(a, ibf, b);
}
+void AliPythia::SetPyquenParameters(Double_t t0, Double_t tau0, Int_t nf, Int_t iengl, Int_t iangl)
+{
+ // Set the parameters for the PYQUEN package.
+ // See comments in PyquenCommon.h
+
+
+ PYQPAR.t0 = t0;
+ PYQPAR.tau0 = tau0;
+ PYQPAR.nf = nf;
+ PYQPAR.iengl = iengl;
+ PYQPAR.iangl = iangl;
+}
+void AliPythia::Pyevnw()
+{
+ // New multiple interaction scenario
+ pyevnw();
+}
+void AliPythia::GetQuenchingParameters(Double_t& xp, Double_t& yp, Double_t z[4])
+{
+ // Return event specific quenching parameters
+ xp = fXJet;
+ yp = fYJet;
+ for (Int_t i = 0; i < 4; i++) z[i] = fZQuench[i];
+
+}
+
+void AliPythia::ConfigHeavyFlavor()
+{
+ //
+ // Default configuration for Heavy Flavor production
+ //
+ // All QCD processes
+ //
+ SetMSEL(1);
+
+ // No multiple interactions
+ SetMSTP(81,0);
+ SetPARP(81, 0.);
+ SetPARP(82, 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(81,1.9); // Min. pt for multiple interactions (default in 6.2-14)
+ 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