X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=EVGEN%2FAliGenPythia.cxx;h=74177f6282d7645fd3586b93959f23c77d6bbbca;hb=74eaafe2c873d04df9fde8995384faf0b909fec0;hp=1e91ee98417dd5d887e2174a05c8510caf3dc4c4;hpb=cb342460d8425222fc7616e7b6500c29e863780d;p=u%2Fmrichter%2FAliRoot.git diff --git a/EVGEN/AliGenPythia.cxx b/EVGEN/AliGenPythia.cxx index 1e91ee98417..74177f6282d 100644 --- a/EVGEN/AliGenPythia.cxx +++ b/EVGEN/AliGenPythia.cxx @@ -1,354 +1,589 @@ -#include "AliGenerator.h" +/************************************************************************** + * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * + * * + * Author: The ALICE Off-line Project. * + * Contributors are mentioned in the code where appropriate. * + * * + * Permission to use, copy, modify and distribute this software and its * + * documentation strictly for non-commercial purposes is hereby granted * + * without fee, provided that the above copyright notice appears in all * + * copies and that both the copyright notice and this permission notice * + * appear in the supporting documentation. The authors make no claims * + * about the suitability of this software for any purpose. It is * + * provided "as is" without express or implied warranty. * + **************************************************************************/ + +/* +$Log$ +Revision 1.42 2001/10/15 08:21:55 morsch +Vertex truncation settings moved to AliGenMC. + +Revision 1.41 2001/10/08 08:45:42 morsch +Possibility of vertex cut added. + +Revision 1.40 2001/09/25 11:30:23 morsch +Pass event vertex to header. + +Revision 1.39 2001/07/27 17:09:36 morsch +Use local SetTrack, KeepTrack and SetHighWaterMark methods +to delegate either to local stack or to stack owned by AliRun. +(Piotr Skowronski, A.M.) + +Revision 1.38 2001/07/13 10:58:54 morsch +- Some coded moved to AliGenMC +- Improved handling of secondary vertices. + +Revision 1.37 2001/06/28 11:17:28 morsch +SetEventListRange setter added. Events in specified range are listed for +debugging. (Yuri Kharlov) + +Revision 1.36 2001/03/30 07:05:49 morsch +Final print-out in finish run. +Write parton system for jet-production (preliminary solution). + +Revision 1.35 2001/03/09 13:03:40 morsch +Process_t and Struc_Func_t moved to AliPythia.h + +Revision 1.34 2001/02/14 15:50:40 hristov +The last particle in event marked using SetHighWaterMark + +Revision 1.33 2001/01/30 09:23:12 hristov +Streamers removed (R.Brun) + +Revision 1.32 2001/01/26 19:55:51 hristov +Major upgrade of AliRoot code + +Revision 1.31 2001/01/17 10:54:31 hristov +Better protection against FPE + +Revision 1.30 2000/12/18 08:55:35 morsch +Make AliPythia dependent generartors work with new scheme of random number generation + +Revision 1.29 2000/12/04 11:22:03 morsch +Init of sRandom as in 1.15 + +Revision 1.28 2000/12/02 11:41:39 morsch +Use SetRandom() to initialize random number generator in constructor. + +Revision 1.27 2000/11/30 20:29:02 morsch +Initialise static variable sRandom in constructor: sRandom = fRandom; + +Revision 1.26 2000/11/30 07:12:50 alibrary +Introducing new Rndm and QA classes + +Revision 1.25 2000/10/18 19:11:27 hristov +Division by zero fixed + +Revision 1.24 2000/09/18 10:41:35 morsch +Add possibility to use nuclear structure functions from PDF library V8. + +Revision 1.23 2000/09/14 14:05:40 morsch +dito + +Revision 1.22 2000/09/14 14:02:22 morsch +- Correct conversion from mm to cm when passing particle vertex to MC. +- Correct handling of fForceDecay == all. + +Revision 1.21 2000/09/12 14:14:55 morsch +Call fDecayer->ForceDecay() at the beginning of Generate(). + +Revision 1.20 2000/09/06 14:29:33 morsch +Use AliPythia for event generation an AliDecayPythia for decays. +Correct handling of "nodecay" option + +Revision 1.19 2000/07/11 18:24:56 fca +Coding convention corrections + few minor bug fixes + +Revision 1.18 2000/06/30 12:40:34 morsch +Pythia takes care of vertex smearing. Correct conversion from Pythia units (mm) to +Geant units (cm). + +Revision 1.17 2000/06/09 20:34:07 morsch +All coding rule violations except RS3 corrected + +Revision 1.16 2000/05/15 15:04:20 morsch +The full event is written for fNtrack = -1 +Coding rule violations corrected. + +Revision 1.15 2000/04/26 10:14:24 morsch +Particles array has one entry more than pythia particle list. Upper bound of +particle loop changed to np-1 (R. Guernane, AM) + +Revision 1.14 2000/04/05 08:36:13 morsch +Check status code of particles in Pythia event +to avoid double counting as partonic state and final state particle. + +Revision 1.13 1999/11/09 07:38:48 fca +Changes for compatibility with version 2.23 of ROOT + +Revision 1.12 1999/11/03 17:43:20 fca +New version from G.Martinez & A.Morsch + +Revision 1.11 1999/09/29 09:24:14 fca +Introduction of the Copyright and cvs Log +*/ + #include "AliGenPythia.h" +#include "AliGenPythiaEventHeader.h" +#include "AliDecayerPythia.h" #include "AliRun.h" #include "AliPythia.h" -#include -#include -#include -#include -#include +#include "AliPDG.h" #include -//#include +#include + ClassImp(AliGenPythia) AliGenPythia::AliGenPythia() - :AliGenerator() + :AliGenMC() { +// Default Constructor + fParticles = 0; + fPythia = 0; + fDecayer = new AliDecayerPythia(); + SetEventListRange(); } AliGenPythia::AliGenPythia(Int_t npart) - :AliGenerator(npart) + :AliGenMC(npart) { // default charm production at 5. 5 TeV // semimuonic decay // structure function GRVHO // fXsection = 0.; - fParentSelect.Set(5); - fChildSelect.Set(5); - for (Int_t i=0; i<5; i++) fParentSelect[i]=fChildSelect[i]=0; + fNucA1=0; + fNucA2=0; SetProcess(); SetStrucFunc(); - ForceDecay(); + SetForceDecay(); SetPtHard(); SetEnergyCMS(); + fDecayer = new AliDecayerPythia(); + // Set random number generator + sRandom=fRandom; + SetEventListRange(); + fFlavorSelect = 0; + // Produced particles + fParticles = new TClonesArray("TParticle",1000); + fEventVertex.Set(3); +} + +AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) +{ +// copy constructor } AliGenPythia::~AliGenPythia() { +// Destructor +} + +void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) +{ + // Set a range of event numbers, for which a table + // of generated particle will be printed + fDebugEventFirst = eventFirst; + fDebugEventLast = eventLast; + if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; } void AliGenPythia::Init() { - SetMC(new AliPythia()); +// Initialisation + SetMC(AliPythia::Instance()); fPythia=(AliPythia*) fgMCEvGen; // fParentWeight=1./Float_t(fNpart); // // Forward Paramters to the AliPythia object - fPythia->DefineParticles(); + fDecayer->SetForceDecay(fForceDecay); + fDecayer->Init(); + + fPythia->SetCKIN(3,fPtHardMin); fPythia->SetCKIN(4,fPtHardMax); + if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2); fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); - fPythia->ForceDecay(fForceDecay); - fPythia->LuList(0); - fPythia->PyStat(2); + + // fPythia->Pylist(0); + // fPythia->Pystat(2); // Parent and Children Selection switch (fProcess) { - case charm: - - fParentSelect[0]=411; - fParentSelect[1]=421; - fParentSelect[2]=431; - fParentSelect[3]=4122; - break; - case charm_unforced: - - fParentSelect[0]=411; - fParentSelect[1]=421; - fParentSelect[2]=431; - fParentSelect[3]=4122; + case kPyCharm: + fParentSelect[0] = 411; + fParentSelect[1] = 421; + fParentSelect[2] = 431; + fParentSelect[3] = 4122; + fFlavorSelect = 4; break; - case beauty: - fParentSelect[0]=511; - fParentSelect[1]=521; - fParentSelect[2]=531; - fParentSelect[3]=5122; + case kPyCharmUnforced: + fParentSelect[0] = 411; + fParentSelect[1] = 421; + fParentSelect[2] = 431; + fParentSelect[3]= 4122; + fFlavorSelect = 4; break; - case beauty_unforced: - fParentSelect[0]=511; - fParentSelect[1]=521; - fParentSelect[2]=531; - fParentSelect[3]=5122; + case kPyBeauty: + fParentSelect[0]= 511; + fParentSelect[1]= 521; + fParentSelect[2]= 531; + fParentSelect[3]= 5122; + fParentSelect[4]= 5132; + fParentSelect[5]= 5232; + fParentSelect[6]= 5332; + fFlavorSelect = 5; break; - case jpsi_chi: - case jpsi: - fParentSelect[0]=443; + case kPyBeautyUnforced: + fParentSelect[0] = 511; + fParentSelect[1] = 521; + fParentSelect[2] = 531; + fParentSelect[3] = 5122; + fParentSelect[4] = 5132; + fParentSelect[5] = 5232; + fParentSelect[6] = 5332; + fFlavorSelect = 5; break; - case mb: + case kPyJpsiChi: + case kPyJpsi: + fParentSelect[0] = 443; break; - } - - switch (fForceDecay) - { - case semielectronic: - case dielectron: - case b_jpsi_dielectron: - case b_psip_dielectron: - fChildSelect[0]=11; - break; - case semimuonic: - case dimuon: - case b_jpsi_dimuon: - case b_psip_dimuon: - case pitomu: - case katomu: - fChildSelect[0]=13; + case kPyMb: + case kPyJets: + case kPyDirectGamma: break; } + AliGenMC::Init(); } void AliGenPythia::Generate() { +// Generate one event + fDecayer->ForceDecay(); - Float_t polar[3] = {0,0,0}; - Float_t origin[3]= {0,0,0}; - Float_t origin_p[3]= {0,0,0}; - Float_t origin0[3]= {0,0,0}; - Float_t p[3], p_p[4], random[6]; + Float_t polar[3] = {0,0,0}; + Float_t origin[3] = {0,0,0}; + Float_t p[3]; // converts from mm/c to s const Float_t kconv=0.001/2.999792458e8; - - // Int_t nt=0; - Int_t nt_p=0; Int_t jev=0; - Int_t j; - + Int_t j, kf; fTrials=0; - for (j=0;j<3;j++) origin0[j]=fOrigin[j]; - if(fVertexSmear==perEvent) { - gMC->Rndm(random,6); - for (j=0;j<3;j++) { - origin0[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* - TMath::Sqrt(-2*TMath::Log(random[2*j+1])); - fPythia->SetMSTP(151,0); - } - } else if (fVertexSmear==perTrack) { - fPythia->SetMSTP(151,0); + +// Set collision vertex position + if(fVertexSmear==kPerEvent) { + fPythia->SetMSTP(151,1); for (j=0;j<3;j++) { fPythia->SetPARP(151+j, fOsigma[j]*10.); } + } else if (fVertexSmear==kPerTrack) { + fPythia->SetMSTP(151,0); } +// event loop while(1) { - fPythia->PyEvnt(); + fPythia->Pyevnt(); + if (gAlice->GetEvNumber()>=fDebugEventFirst && + gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); fTrials++; - TObjArray* particles = fPythia->ImportParticles(); - Int_t np = particles->GetEntriesFast(); - printf("\n **************************************************%d\n",np); - Int_t nc=0; + fPythia->ImportParticles(fParticles,"All"); + +// +// +// + Int_t i; + + Int_t np = fParticles->GetEntriesFast(); if (np == 0 ) continue; - if (fProcess != mb) { - for (Int_t i = 0; iAt(i); - Int_t kf = iparticle->GetPdgCode(); - fChildWeight=(fPythia->GetBraPart(kf))*fParentWeight; +// Get event vertex and discard the event if the Z coord. is too big + TParticle *iparticle = (TParticle *) fParticles->At(0); + Float_t distz = iparticle->Vz()/10.; + if(TMath::Abs(distz)>fCutVertexZ*fOsigma[2]) continue; // -// Parent - if (ParentSelected(TMath::Abs(kf))) { - if (KinematicSelection(iparticle)) { - if (nc==0) { + fEventVertex[0] = iparticle->Vx()/10.+fOrigin.At(0); + fEventVertex[1] = iparticle->Vy()/10.+fOrigin.At(1); + fEventVertex[2] = iparticle->Vz()/10.+fOrigin.At(2); +// + Int_t* pParent = new Int_t[np]; + Int_t* pSelected = new Int_t[np]; + Int_t* trackIt = new Int_t[np]; + for (i=0; i< np-1; i++) { + pParent[i] = -1; + pSelected[i] = 0; + } + printf("\n **************************************************%d\n",np); + Int_t nc = 0; + if (fProcess != kPyMb && fProcess != kPyJets && fProcess != kPyDirectGamma) { + for (i = 0; iAt(i); + Int_t ks = iparticle->GetStatusCode(); + kf = CheckPDGCode(iparticle->GetPdgCode()); +// No initial state partons + if (ks==21) continue; // -// Store information concerning the hard scattering process +// Heavy Flavor Selection // - Float_t mass_p = fPythia->GetPARI(13); - Float_t pt_p = fPythia->GetPARI(17); - Float_t y_p = fPythia->GetPARI(37); - Float_t xmt_p = sqrt(pt_p*pt_p+mass_p*mass_p); - Float_t ty = Float_t(TMath::TanH(y_p)); - p_p[0] = pt_p; - p_p[1] = 0; - p_p[2] = xmt_p*ty/sqrt(1.-ty*ty); - p_p[3] = mass_p; - gAlice->SetTrack(0,-1,-1, - p_p,origin_p,polar, - 0,"Hard Scat.",nt_p,fParentWeight); - gAlice->KeepTrack(nt_p); - } - nc++; + // quark ? + kf = TMath::Abs(kf); + Int_t kfl = kf; + // meson ? + if (kfl > 10) kfl/=100; + // baryon + if (kfl > 10) kfl/=10; + if (kfl > 10) kfl/=10; + + Int_t ipa = iparticle->GetFirstMother()-1; + Int_t kfMo = 0; + + if (ipa > -1) { + TParticle * mother = (TParticle *) fParticles->At(ipa); + kfMo = TMath::Abs(mother->GetPdgCode()); + } +// printf("\n particle (all) %d %d %d", i, pSelected[i], kf); + if (kfl >= fFlavorSelect) { // -// store parent track information - p[0]=iparticle->Px(); - p[1]=iparticle->Py(); - p[2]=iparticle->Pz(); - origin[0]=origin0[0]+iparticle->Vx()/10; - origin[1]=origin0[1]+iparticle->Vy()/10; - origin[2]=origin0[2]+iparticle->Vz()/10; - - Int_t ifch=iparticle->GetFirstDaughter(); - Int_t ilch=iparticle->GetLastDaughter(); - if (ifch !=0 && ilch !=0) { - gAlice->SetTrack(0,nt_p,kf, - p,origin,polar, - 0,"Primary",nt,fParentWeight); - gAlice->KeepTrack(nt); - Int_t iparent = nt; +// Heavy flavor hadron or quark // -// Children +// Kinematic seletion on final state heavy flavor mesons + if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) + { + nc = -1; + break; + } + pSelected[i] = 1; +// printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); + } else { +// Kinematic seletion on decay products + if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) + && !KinematicSelection(iparticle, 1)) + { + nc = -1; + break; + } +// +// Decay products +// Select if mother was selected and is not tracked - for (Int_t j=ifch; j<=ilch; j++) - { - TParticle * ichild = - (TParticle *) particles->At(j-1); - Int_t kf = ichild->GetPdgCode(); + if (pSelected[ipa] && + !trackIt[ipa] && // mother will be tracked ? + kfMo != 5 && // mother is b-quark, don't store fragments + kfMo != 4 && // mother is c-quark, don't store fragments + kf != 92) // don't store string + { // +// Semi-stable or de-selected: diselect decay products: // - if (ChildSelected(TMath::Abs(kf))) { - origin[0]=ichild->Vx(); - origin[1]=ichild->Vy(); - origin[2]=ichild->Vz(); - p[0]=ichild->Px(); - p[1]=ichild->Py(); - p[2]=ichild->Pz(); - Float_t tof=kconv*ichild->T(); - gAlice->SetTrack(fTrackIt, iparent, kf, - p,origin,polar, - tof,"Decay",nt,fChildWeight); - gAlice->KeepTrack(nt); - } // select child - } // child loop +// + if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > 10e-15) + { + Int_t ipF = iparticle->GetFirstDaughter(); + Int_t ipL = iparticle->GetLastDaughter(); + if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; } - } // kinematic selection - } // select particle - } // particle loop - } else { - for (Int_t i = 0; iAt(i); - Int_t kf = iparticle->GetPdgCode(); - Int_t ks = iparticle->GetStatusCode(); - if (ks==1 && kf!=0 && KinematicSelection(iparticle)) { - nc++; +// printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); + pSelected[i] = (pSelected[i] == -1) ? 0 : 1; + } + } + if (pSelected[i] == -1) pSelected[i] = 0; + if (!pSelected[i]) continue; + nc++; +// Decision on tracking + trackIt[i] = 0; // -// store track information - p[0]=iparticle->Px(); - p[1]=iparticle->Py(); - p[2]=iparticle->Pz(); - origin[0]=origin0[0]+iparticle->Vx()/10; - origin[1]=origin0[1]+iparticle->Vy()/10; - origin[2]=origin0[2]+iparticle->Vz()/10; - Float_t tof=kconv*iparticle->T(); - gAlice->SetTrack(fTrackIt,-1,kf,p,origin,polar, - tof,"Primary",nt); - gAlice->KeepTrack(nt); - } // select particle - } // particle loop - printf("\n I've put %i particles on the stack \n",nc); +// Track final state particle + if (ks == 1) trackIt[i] = 1; +// Track semi-stable particles + if ((ks ==1) || (fDecayer->GetLifetime(kf)> 10e-15)) trackIt[i] = 1; +// Track particles selected by process if undecayed. + if (fForceDecay == kNoDecay) { + if (ParentSelected(kf)) trackIt[i] = 1; + } else { + if (ParentSelected(kf)) trackIt[i] = 0; + } +// +// + + } // particle selection loop + if (nc > -1) { + for (i = 0; iAt(i); + kf = CheckPDGCode(iparticle->GetPdgCode()); + p[0] = iparticle->Px(); + p[1] = iparticle->Py(); + p[2] = iparticle->Pz(); + origin[0] = fOrigin[0]+iparticle->Vx()/10.; + origin[1] = fOrigin[1]+iparticle->Vy()/10.; + origin[2] = fOrigin[2]+iparticle->Vz()/10.; + Float_t tof = kconv*iparticle->T(); + Int_t ipa = iparticle->GetFirstMother()-1; + Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; + SetTrack(fTrackIt*trackIt[i] , + iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1.); + pParent[i] = nt; + KeepTrack(nt); + } // SetTrack loop + } + } else { + nc = GenerateMB(); } // mb ? + if (nc > 0) { jev+=nc; - if (jev >= fNpart) { + if (jev >= fNpart || fNpart == -1) { fKineBias=Float_t(fNpart)/Float_t(fTrials); - printf("\n Trials: %i\n",fTrials); + printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); break; } } } // event loop + SetHighWaterMark(nt); // adjust weight due to kinematic selection AdjustWeights(); // get cross-section fXsection=fPythia->GetPARI(1); } -Bool_t AliGenPythia::ParentSelected(Int_t ip) +Int_t AliGenPythia::GenerateMB() { - for (Int_t i=0; i<5; i++) - { - if (fParentSelect[i]==ip) return kTRUE; - } - return kFALSE; -} + Int_t i, kf, nt, iparent; + Int_t nc = 0; + Float_t p[3]; + Float_t polar[3] = {0,0,0}; + Float_t origin[3] = {0,0,0}; +// converts from mm/c to s + const Float_t kconv=0.001/2.999792458e8; + + Int_t np = fParticles->GetEntriesFast(); + Int_t* pParent = new Int_t[np]; + for (i=0; i< np-1; i++) pParent[i] = -1; -Bool_t AliGenPythia::ChildSelected(Int_t ip) -{ - for (Int_t i=0; i<5; i++) - { - if (fChildSelect[i]==ip) return kTRUE; - } - return kFALSE; -} + for (i = 0; iAt(i); + kf = CheckPDGCode(iparticle->GetPdgCode()); + Int_t ks = iparticle->GetStatusCode(); + Int_t km = iparticle->GetFirstMother(); +// printf("\n Particle: %d %d %d", i, kf, ks); + + if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || + (ks != 1) || + (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { + nc++; + if (ks == 1) trackIt = 1; + Int_t ipa = iparticle->GetFirstMother()-1; -Bool_t AliGenPythia::KinematicSelection(TParticle *particle) -{ - Float_t px=particle->Px(); - Float_t py=particle->Py(); - Float_t pz=particle->Pz(); - Float_t e=particle->Energy(); + iparent = (ipa > -1) ? pParent[ipa] : -1; // -// transverse momentum cut - Float_t pt=TMath::Sqrt(px*px+py*py); - if (pt > fPtMax || pt < fPtMin) - { -// printf("\n failed pt cut %f %f %f \n",pt,fPtMin,fPtMax); - return kFALSE; - } -// -// momentum cut - Float_t p=TMath::Sqrt(px*px+py*py+pz*pz); - if (p > fPMax || p < fPMin) - { -// printf("\n failed p cut %f %f %f \n",p,fPMin,fPMax); - return kFALSE; - } - -// -// theta cut - Float_t theta = Float_t(TMath::ATan2(Double_t(pt),Double_t(pz))); - if (theta > fThetaMax || theta < fThetaMin) - { -// printf("\n failed theta cut %f %f %f \n",theta,fThetaMin,fThetaMax); - return kFALSE; - } +// store track information + p[0] = iparticle->Px(); + p[1] = iparticle->Py(); + p[2] = iparticle->Pz(); + origin[0] = fOrigin[0]+iparticle->Vx()/10.; + origin[1] = fOrigin[1]+iparticle->Vy()/10.; + origin[2] = fOrigin[2]+iparticle->Vz()/10.; + Float_t tof=kconv*iparticle->T(); + SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar, + tof, kPPrimary, nt); + KeepTrack(nt); + pParent[i] = nt; + } // select particle + } // particle loop -// -// rapidity cut - Float_t y = 0.5*TMath::Log((e+pz)/(e-pz)); - if (y > fYMax || y < fYMin) - { -// printf("\n failed y cut %f %f %f \n",y,fYMin,fYMax); - return kFALSE; - } + if (pParent) delete[] pParent; + + printf("\n I've put %i particles on the stack \n",nc); + MakeHeader(); + return nc; +} -// -// phi cut - Float_t phi=Float_t(TMath::ATan2(Double_t(py),Double_t(px)))+TMath::Pi(); - if (phi > fPhiMax || phi < fPhiMin) - { -// printf("\n failed phi cut %f %f %f \n",phi,fPhiMin,fPhiMax); - return kFALSE; - } - return kTRUE; +void AliGenPythia::FinishRun() +{ +// Print x-section summary + fPythia->Pystat(1); } + void AliGenPythia::AdjustWeights() { - TClonesArray *PartArray = gAlice->Particles(); - TParticle *Part; +// Adjust the weights after generation of all events +// + TParticle *part; Int_t ntrack=gAlice->GetNtrack(); for (Int_t i=0; iUncheckedAt(i); - Part->SetWeight(Part->GetWeight()*fKineBias); + part= gAlice->Particle(i); + part->SetWeight(part->GetWeight()*fKineBias); } } + +void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) +{ +// Treat protons as inside nuclei with mass numbers a1 and a2 + fNucA1 = a1; + fNucA2 = a2; +} +void AliGenPythia::MakeHeader() +{ +// Builds the event header, to be called after each event + AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia"); + ((AliGenPythiaEventHeader*) header)->SetProcessType(fPythia->GetMSTI(1)); + header->SetPrimaryVertex(fEventVertex); + gAlice->SetGenEventHeader(header); +} + + +AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) +{ +// Assignment operator + return *this; +} +#ifdef never +void AliGenPythia::Streamer(TBuffer &R__b) +{ + // Stream an object of class AliGenPythia. - - + if (R__b.IsReading()) { + Version_t R__v = R__b.ReadVersion(); if (R__v) { } + AliGenerator::Streamer(R__b); + R__b >> (Int_t&)fProcess; + R__b >> (Int_t&)fStrucFunc; + R__b >> (Int_t&)fForceDecay; + R__b >> fEnergyCMS; + R__b >> fKineBias; + R__b >> fTrials; + fParentSelect.Streamer(R__b); + fChildSelect.Streamer(R__b); + R__b >> fXsection; +// (AliPythia::Instance())->Streamer(R__b); + R__b >> fPtHardMin; + R__b >> fPtHardMax; +// if (fDecayer) fDecayer->Streamer(R__b); + } else { + R__b.WriteVersion(AliGenPythia::IsA()); + AliGenerator::Streamer(R__b); + R__b << (Int_t)fProcess; + R__b << (Int_t)fStrucFunc; + R__b << (Int_t)fForceDecay; + R__b << fEnergyCMS; + R__b << fKineBias; + R__b << fTrials; + fParentSelect.Streamer(R__b); + fChildSelect.Streamer(R__b); + R__b << fXsection; +// R__b << fPythia; + R__b << fPtHardMin; + R__b << fPtHardMax; + // fDecayer->Streamer(R__b); + } +} +#endif