X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=ZDC%2FAliGenZDC.cxx;h=7fb86efbb4009d24883ac9b03add1b30160f5e60;hb=4cd5762475dfcadd178024d33e4752ff1352cf17;hp=5c173a910e107994b51614bb0efc46bef8be44de;hpb=1de555dc8f5474a46f6cbde6001bc92f78ba0f33;p=u%2Fmrichter%2FAliRoot.git diff --git a/ZDC/AliGenZDC.cxx b/ZDC/AliGenZDC.cxx index 5c173a910e1..7fb86efbb40 100644 --- a/ZDC/AliGenZDC.cxx +++ b/ZDC/AliGenZDC.cxx @@ -13,41 +13,28 @@ * provided "as is" without express or implied warranty. * **************************************************************************/ -/* -$Log$ -Revision 1.5 2000/11/22 11:30:12 coppedis -Major code revision +/* $Id$ */ -Revision 1.4 2000/10/05 08:02:47 fca -Correction of the generator direction +////////////////////////////////////////////////////////////////////// +// // // +// Generator of spectator nucleons (either protons or neutrons)// +// computes beam crossing and divergence and Fermi momentum // +// // +///////////////////////////////////////////////////////////////////// -Revision 1.3 2000/10/02 21:28:20 fca -Removal of useless dependecies via forward declarations - -Revision 1.2 2000/07/11 11:12:34 fca -Some syntax corrections for non standard HP aCC - -Revision 1.1 2000/07/10 13:58:01 fca -New version of ZDC from E.Scomparin & C.Oppedisano - -Revision 1.7 2000/01/19 17:17:40 fca - -Revision 1.6 1999/09/29 09:24:35 fca -Introduction of the Copyright and cvs Log - -*/ #include -#include +#include #include +#include +#include +#include #include -#include "TDatabasePDG.h" -#include "AliGenZDC.h" #include "AliConst.h" -#include "AliPDG.h" +#include "AliGenZDC.h" #include "AliRun.h" -#include "AliMCProcess.h" +#include "AliMC.h" ClassImp(AliGenZDC) @@ -75,22 +62,35 @@ 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(" 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); + // + printf("\n\n AliGenZDC initialization:\n"); + printf(" Particle: %d, Track cosines: x = %f, y = %f, z = %f \n", + fIpart,fCosx,fCosy,fCosz); + printf(" Fermi flag = %d, Beam divergence = %f, Crossing angle " + "= %f, Crossing plane = %d\n\n", fFermiflag, fBeamDiv, fBeamCrossAngle, + fBeamCrossPlane); + + FermiTwoGaussian(207.,fPp,fProbintp,fProbintn); } //_____________________________________________________________________________ @@ -101,8 +101,8 @@ 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.){ @@ -116,43 +116,35 @@ void AliGenZDC::Generate() pLab[1] = 0.; pLab[2] = ptot*TMath::Cos(scang); } - for(i=0; i<=2; i++){ - fPInit[i] = pLab[i]; - fP[i] = pLab[i]; + for(i=0; i<=2; i++) fP[i] = pLab[i]; + if(fDebugOpt == 1){ + printf("\n\n Particle momentum before divergence and crossing\n"); + for(i=0; i<=2; i++)printf(" pLab[%d] = %f\n",i,pLab[i]); } // Beam divergence and crossing angle if(fBeamCrossAngle!=0.) { BeamDivCross(1,fBeamDiv,fBeamCrossAngle,fBeamCrossPlane,pLab); - for(i=0; i<=2; i++){ - fP[i] = pLab[i]; - } + for(i=0; i<=2; i++) fP[i] = pLab[i]; } if(fBeamDiv!=0.) { BeamDivCross(0,fBeamDiv,fBeamCrossAngle,fBeamCrossPlane,pLab); - for(i=0; i<=2; i++){ - fP[i] = pLab[i]; - } + for(i=0; i<=2; i++) fP[i] = pLab[i]; } // If required apply the Fermi momentum if(fFermiflag==1){ - if((fIpart==kProton) || (fIpart==kNeutron)){ + 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); - for(i=0; i<=2; i++){ - dddp[i] = ddp[i]; - } + 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); 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]; @@ -160,25 +152,37 @@ void AliGenZDC::Generate() } - for(i=0; i<=2; i++){ - fPTrack[i] = fP[i]; - } + for(i=0; i<=2; i++) fPTrack[i] = fP[i]; 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, + gAlice->GetMCApp()->PushTrack(fTrackIt,-1,fIpart,fPTrack,fOrigin.GetArray(),polar,0, kPPrimary,nt); + // ----------------------------------------------------------------------- + if(fDebugOpt == 1){ + printf("\n\n Track momentum:\n"); + printf("\n fPTrack = %f, %f, %f \n",fPTrack[0],fPTrack[1],fPTrack[2]); + } + else if(fDebugOpt == 2){ + FILE *file; + if((file = fopen("SpectMomentum.dat","a")) == NULL){ + printf("Cannot open file SpectMomentum.dat\n"); + return; + } + fprintf(file," %f \t %f \t %f \n",fPTrack[0],fPTrack[1],fPTrack[2]); + fclose(file); + } + } //_____________________________________________________________________________ -void AliGenZDC::FermiTwoGaussian(Double_t A, Float_t Z, Double_t* fPp, Double_t* - fProbintp, Double_t* fProbintn) +void AliGenZDC::FermiTwoGaussian(Float_t A, 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; @@ -197,23 +201,26 @@ 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]) && (xxGaus(0.0,1.0); tetdiv = fBeamDiv * TMath::Abs(rvec); fidiv = (gRandom->Rndm())*k2PI; } - else if(icross==1){ + else if(icross==1){ // ##### Crossing angle if(fBeamCrossPlane==0.){ tetdiv = 0.; fidiv = 0.; } - else if(fBeamCrossPlane==1.){ + else if(fBeamCrossPlane==1.){ // Horizontal crossing plane tetdiv = fBeamCrossAngle; fidiv = 0.; } - else if(fBeamCrossPlane==2.){ + else if(fBeamCrossPlane==2.){ // Vertical crossing plane tetdiv = fBeamCrossAngle; fidiv = k2PI/4.; } } - tetpart = TMath::ATan(TMath::Sqrt(pLab[0]*pLab[0]+pLab[1]*pLab[1])/pLab[2]); - if(pLab[1]!=0. || pLab[0]!=0.){ - fipart = TMath::ATan2(pLab[1],pLab[0]); - } - else{ - fipart = 0.; - } + tetpart = TMath::ATan2(TMath::Sqrt(pLab[0]*pLab[0]+pLab[1]*pLab[1]),pLab[2]); + if(pLab[1]!=0. || pLab[0]!=0.) fipart = TMath::ATan2(pLab[1],pLab[0]); + else fipart = 0.; if(fipart<0.) {fipart = fipart+k2PI;} tetdiv = tetdiv*kRaddeg; fidiv = fidiv*kRaddeg; @@ -287,15 +293,18 @@ void AliGenZDC::BeamDivCross(Int_t icross, Float_t fBeamDiv, Float_t fBeamCrossA pLab[0] = pmod*TMath::Sin(tetsum)*TMath::Cos(fisum); pLab[1] = pmod*TMath::Sin(tetsum)*TMath::Sin(fisum); pLab[2] = pmod*TMath::Cos(tetsum); - for(i=0; i<=2; i++){ - fDivP[i] = pLab[i]; + if(fDebugOpt == 1){ + if(icross==0) printf("\n\n Beam divergence \n"); + else printf("\n\n Beam crossing \n"); + for(i=0; i<=2; i++)printf(" pLab[%d] = %f\n",i,pLab[i]); } } //_____________________________________________________________________________ void AliGenZDC::AddAngle(Double_t theta1, Double_t phi1, Double_t theta2, - Double_t phi2, Double_t* angleSum) -{ + Double_t phi2, Double_t *angleSum) +{ + // Calculating the sum of 2 angles Double_t temp, conv, cx, cy, cz, ct1, st1, ct2, st2, cp1, sp1, cp2, sp2; Double_t rtetsum, tetsum, fisum;