X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=blobdiff_plain;f=ZDC%2FAliGenZDC.cxx;h=13ff20efdb42ec00e0a19f763f69f42c301ee854;hp=b4f3f2b93950d1dcb33e71eef78d8e63d45b8277;hb=0ff3ad025639fe5ed2d311995d4db252764c3e05;hpb=866ab5a2482a5b4c1493a28727bb0e8753d7777c;ds=inline diff --git a/ZDC/AliGenZDC.cxx b/ZDC/AliGenZDC.cxx index b4f3f2b9395..13ff20efdb4 100644 --- a/ZDC/AliGenZDC.cxx +++ b/ZDC/AliGenZDC.cxx @@ -15,6 +15,21 @@ /* $Log$ +Revision 1.10 2001/09/26 16:00:47 coppedis +Minor change + +Revision 1.8 2001/04/20 10:10:25 coppedis +Minor changes + +Revision 1.7 2001/03/15 16:13:28 coppedis +Code review + +Revision 1.6 2000/11/30 17:16:14 coppedis +Changes suggested by fca + +Revision 1.5 2000/11/22 11:30:12 coppedis +Major code revision + Revision 1.4 2000/10/05 08:02:47 fca Correction of the generator direction @@ -44,6 +59,7 @@ Introduction of the Copyright and cvs Log #include "AliConst.h" #include "AliPDG.h" #include "AliRun.h" +#include "AliMCProcess.h" ClassImp(AliGenZDC) @@ -71,20 +87,32 @@ AliGenZDC::AliGenZDC(Int_t npart) fCosy = 0.; fCosz = 1.; fPseudoRapidity = 0.; + fFermiflag = 1; // LHC values for beam divergence and crossing angle fBeamDiv = 0.000032; fBeamCrossAngle = 0.0001; fBeamCrossPlane = 2; + + Int_t i, j; + for(i=0; i<201; i++){ + fProbintp[i] = 0; + fProbintn[i] = 0; + } + for(j=0; j<3; j++){ + fPp[i] = 0; + } + fDebugOpt = 0; } //_____________________________________________________________________________ void AliGenZDC::Init() { - printf(" AliGenZDC initialized with:\n"); + printf("\n\n AliGenZDC initialized with:\n"); printf(" Fermi flag = %d, Beam Divergence = %f, Crossing Angle " "= %f, Crossing Plane = %d\n\n", fFermiflag, fBeamDiv, fBeamCrossAngle, fBeamCrossPlane); + //Initialize Fermi momentum distributions for Pb-Pb FermiTwoGaussian(207.,82.,fPp,fProbintp,fProbintn); } @@ -97,8 +125,8 @@ void AliGenZDC::Generate() // Int_t i; - Double_t mass, pLab[3], fP0, ddp[3], dddp0, dddp[3]; - Float_t ptot = fPMin; + Double_t Mass, pLab[3], fP0, fP[3], fBoostP[3], ddp[3], dddp0, dddp[3]; + Float_t fPTrack[3], ptot = fPMin; Int_t nt; if(fPseudoRapidity==0.){ @@ -113,10 +141,10 @@ void AliGenZDC::Generate() pLab[2] = ptot*TMath::Cos(scang); } for(i=0; i<=2; i++){ - fPInit[i] = pLab[i]; fP[i] = pLab[i]; } + // Beam divergence and crossing angle if(fBeamCrossAngle!=0.) { BeamDivCross(1,fBeamDiv,fBeamCrossAngle,fBeamCrossPlane,pLab); @@ -136,19 +164,17 @@ void AliGenZDC::Generate() if((fIpart==kProton) || (fIpart==kNeutron)){ ExtractFermi(fIpart,fPp,fProbintp,fProbintn,ddp); } - mass=gAlice->PDGDB()->GetParticle(fIpart)->Mass(); - fP0 = TMath::Sqrt(fP[0]*fP[0]+fP[1]*fP[1]+fP[2]*fP[2]+mass*mass); + Mass=gAlice->PDGDB()->GetParticle(fIpart)->Mass(); + fP0 = TMath::Sqrt(fP[0]*fP[0]+fP[1]*fP[1]+fP[2]*fP[2]+Mass*Mass); for(i=0; i<=2; i++){ dddp[i] = ddp[i]; } - dddp0 = TMath::Sqrt(dddp[0]*dddp[0]+dddp[1]*dddp[1]+dddp[2]*dddp[2]+mass*mass); + dddp0 = TMath::Sqrt(dddp[0]*dddp[0]+dddp[1]*dddp[1]+dddp[2]*dddp[2]+Mass*Mass); TVector3 b(fP[0]/fP0, fP[1]/fP0, fP[2]/fP0); TLorentzVector pFermi(dddp[0], dddp[1], dddp[2], dddp0); - pFermi.Boost(b); - for(i=0; i<=2; i++){ fBoostP[i] = pFermi[i]; fP[i] = pFermi[i]; @@ -161,20 +187,23 @@ void AliGenZDC::Generate() } Float_t polar[3] = {0,0,0}; -// printf("fPTrack = %f, %f, %f \n",fPTrack[0],fPTrack[1],fPTrack[2]); gAlice->SetTrack(fTrackIt,-1,fIpart,fPTrack,fOrigin.GetArray(),polar,0, - "Primary",nt); + kPPrimary,nt); + if(fDebugOpt == 1){ + printf("\n\n Track momentum:\n"); + printf("\n fPTrack = %f, %f, %f \n",fPTrack[0],fPTrack[1],fPTrack[2]); + } } //_____________________________________________________________________________ -void AliGenZDC::FermiTwoGaussian(Double_t A, Float_t Z, Double_t* fPp, Double_t* - fProbintp, Double_t* fProbintn) +void AliGenZDC::FermiTwoGaussian(Float_t A, Float_t Z, Double_t *fPp, + Double_t *fProbintp, Double_t *fProbintn) { // // Momenta distributions according to the "double-gaussian" // distribution (Ilinov) - equal for protons and neutrons // -// printf(" Initialization of Fermi momenta distribution\n"); + fProbintp[0] = 0; fProbintn[0] = 0; Double_t sig1 = 0.113; @@ -193,23 +222,27 @@ void AliGenZDC::FermiTwoGaussian(Double_t A, Float_t Z, Double_t* fPp, Double_t* alfa*f2/(TMath::Power(sig2,3.)))*0.005; fProbintp[i] = fProbintp[i-1] + probp; fProbintn[i] = fProbintp[i]; -// printf(" fProbintp[%d] = %f, fProbintp[%d] = %f\n",i,fProbintp[i],i,fProbintn[i]); + } + if(fDebugOpt == 1){ + printf("\n\n Initialization of Fermi momenta distribution \n"); + for(Int_t i=0; i<=200; i++){ + printf(" fProbintp[%d] = %f, fProbintn[%d] = %f\n",i,fProbintp[i],i,fProbintn[i]); + } } } //_____________________________________________________________________________ -void AliGenZDC::ExtractFermi(Int_t id, Double_t* fPp, Double_t* fProbintp, - Double_t* fProbintn, Double_t* ddp) +void AliGenZDC::ExtractFermi(Int_t id, Double_t *fPp, Double_t *fProbintp, + Double_t *fProbintn, Double_t *ddp) { // // Compute Fermi momentum for spectator nucleons // -// printf(" Extraction of Fermi momentum\n"); - + Int_t i; Float_t xx = gRandom->Rndm(); assert ( id==kProton || id==kNeutron ); if(id==kProton){ - for(i=0; i<=200; i++){ + for(i=1; i<=200; i++){ if((xx>=fProbintp[i-1]) && (xx