X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;ds=inline;f=EVGEN%2FAliGenParam.cxx;h=2a5723c8a71c9aed4e8cb6190ba7b524b344e349;hb=9e9ae065edae598f2b4f52d9e3f0df08cd6d7bc4;hp=61f8f44a09093333e6a3e73a74a31caed69d37e9;hpb=7cdba479ac84d9e3621351018a6917570b21b797;p=u%2Fmrichter%2FAliRoot.git diff --git a/EVGEN/AliGenParam.cxx b/EVGEN/AliGenParam.cxx index 61f8f44a090..2a5723c8a71 100644 --- a/EVGEN/AliGenParam.cxx +++ b/EVGEN/AliGenParam.cxx @@ -13,123 +13,7 @@ * provided "as is" without express or implied warranty. * **************************************************************************/ -/* -$Log$ -Revision 1.42 2003/03/15 19:48:01 morsch -AliDecayerPythia replaced by AliDecayer - -Revision 1.41 2003/01/09 17:38:47 morsch -Draw() method added. - -Revision 1.40 2002/10/14 14:55:35 hristov -Merging the VirtualMC branch to the main development branch (HEAD) - -Revision 1.36.6.3 2002/10/10 16:40:08 hristov -Updating VirtualMC to v3-09-02 - -Revision 1.39 2002/09/16 08:21:16 morsch -Use TDatabasePDG::Instance(); - -Revision 1.38 2002/05/30 14:59:12 morsch -Check geometrical acceptance. (G. Martinez) - -Revision 1.37 2002/04/17 10:20:44 morsch -Coding Rule violations corrected. - -Revision 1.36 2002/02/08 16:50:50 morsch -Add name and title in constructor. - -Revision 1.35 2002/01/21 10:02:40 morsch -ty is Double_t -Abort if too high rapidity causes numerical paroblem. User has to specify -meaningful y-range. - -Revision 1.34 2001/11/27 13:13:07 morsch -Maximum lifetime for long-lived particles to be put on the stack is parameter. -It can be set via SetMaximumLifetime(..). - -Revision 1.33 2001/10/21 18:35:56 hristov -Several pointers were set to zero in the default constructors to avoid memory management problems - -Revision 1.32 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 1.31 2001/07/13 10:58:54 morsch -- Some coded moved to AliGenMC -- Improved handling of secondary vertices. - -Revision 1.30 2001/06/15 07:55:04 morsch -Put only first generation decay products on the stack. - -Revision 1.29 2001/03/27 10:58:41 morsch -Initialize decayer before generation. Important if run inside cocktail. - -Revision 1.28 2001/03/09 13:01:41 morsch -- enum constants for paramterisation type (particle family) moved to AliGen*lib.h -- use AliGenGSIlib::kUpsilon, AliGenPHOSlib::kEtaPrime to access the constants - -Revision 1.27 2001/02/02 15:21:10 morsch -Set high water mark after last particle. -Use Vertex() method for Vertex. - -Revision 1.26 2000/12/21 16:24:06 morsch -Coding convention clean-up - -Revision 1.25 2000/11/30 07:12:50 alibrary -Introducing new Rndm and QA classes - -Revision 1.24 2000/10/18 19:11:27 hristov -Division by zero fixed - -Revision 1.23 2000/10/02 21:28:06 fca -Removal of useless dependecies via forward declarations - -Revision 1.22 2000/09/12 14:14:55 morsch -Call fDecayer->ForceDecay() at the beginning of Generate(). - -Revision 1.21 2000/09/08 15:39:01 morsch -Handle the case fForceDecay=all during the generation, i.e. select all secondaries. - -Revision 1.20 2000/09/06 14:35:44 morsch -Use AliDecayerPythia for particle decays. - -Revision 1.19 2000/07/11 18:24:56 fca -Coding convention corrections + few minor bug fixes - -Revision 1.18 2000/06/29 21:08:27 morsch -All paramatrisation libraries derive from the pure virtual base class AliGenLib. -This allows to pass a pointer to a library directly to AliGenParam and avoids the -use of function pointers in Config.C. - -Revision 1.17 2000/06/09 20:33:30 morsch -All coding rule violations except RS3 corrected - -Revision 1.16 2000/05/02 07:51:31 morsch -- Control precision of pT sampling TF1::SetNpx(..) -- Correct initialisation of child-cuts in all constructors. -- Most coding rule violations corrected. - -Revision 1.15 2000/04/03 15:42:12 morsch -Cuts on primary particles are separated from those on the decay products. Methods -SetChildMomentumRange, SetChildPtRange, SetChildPhiRange, SetChildThetaRange added. - -Revision 1.14 1999/11/09 07:38:48 fca -Changes for compatibility with version 2.23 of ROOT - -Revision 1.13 1999/11/04 11:30:31 fca -Correct the logics for SetForceDecay - -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 - -*/ - - +/* $Id$ */ // Class to generate particles from using paramtrized pT and y distributions. // Distributions are obtained from pointer to object of type AliGenLib. @@ -137,18 +21,24 @@ Introduction of the Copyright and cvs Log // Decays are performed using Pythia. // andreas.morsch@cern.ch -#include "AliGenParam.h" -#include "AliDecayer.h" -#include "AliGenMUONlib.h" -#include "AliRun.h" -#include -#include +#include +#include #include +#include +#include #include +#include +#include +#include +#include +#include -#include -#include -#include +#include "AliDecayer.h" +#include "AliGenMUONlib.h" +#include "AliGenParam.h" +#include "AliMC.h" +#include "AliRun.h" +#include "AliGenEventHeader.h" ClassImp(AliGenParam) @@ -161,56 +51,73 @@ ClassImp(AliGenParam) //End_Html //____________________________________________________________ -//____________________________________________________________ -AliGenParam::AliGenParam() + AliGenParam::AliGenParam(): + fPtParaFunc(0), + fYParaFunc(0), + fIpParaFunc(0), + fPtPara(0), + fYPara(0), + fParam(0), + fdNdy0(0.), + fYWgt(0.), + fPtWgt(0.), + fBias(0.), + fTrials(0), + fDeltaPt(0.01), + fDecayer(0) { -// Deafault constructor - fPtPara = 0; - fYPara = 0; - fParam = 0; - fAnalog = kAnalog; - SetDeltaPt(); - fDecayer = 0; - - +// Default constructor } - -AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname):AliGenMC(npart) +//____________________________________________________________ +AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname) + :AliGenMC(npart), + fPtParaFunc(Library->GetPt(param, tname)), + fYParaFunc (Library->GetY (param, tname)), + fIpParaFunc(Library->GetIp(param, tname)), + fPtPara(0), + fYPara(0), + fParam(param), + fdNdy0(0.), + fYWgt(0.), + fPtWgt(0.), + fBias(0.), + fTrials(0), + fDeltaPt(0.01), + fDecayer(0) { // Constructor using number of particles parameterisation id and library fName = "Param"; fTitle= "Particle Generator using pT and y parameterisation"; - - fPtParaFunc = Library->GetPt(param, tname); - fYParaFunc = Library->GetY (param, tname); - fIpParaFunc = Library->GetIp(param, tname); - - fPtPara = 0; - fYPara = 0; - fParam = param; fAnalog = kAnalog; SetForceDecay(); - SetDeltaPt(); } - //____________________________________________________________ - -AliGenParam::AliGenParam(Int_t npart, Int_t param, char* tname):AliGenMC(npart) +AliGenParam::AliGenParam(Int_t npart, Int_t param, const char* tname, const char* name): + AliGenMC(npart), + fPtParaFunc(0), + fYParaFunc (0), + fIpParaFunc(0), + fPtPara(0), + fYPara(0), + fParam(param), + fdNdy0(0.), + fYWgt(0.), + fPtWgt(0.), + fBias(0.), + fTrials(0), + fDeltaPt(0.01), + fDecayer(0) { // Constructor using parameterisation id and number of particles // - fName = "Param"; + fName = name; fTitle= "Particle Generator using pT and y parameterisation"; AliGenLib* pLibrary = new AliGenMUONlib(); - fPtParaFunc = pLibrary->GetPt(param, tname); fYParaFunc = pLibrary->GetY (param, tname); fIpParaFunc = pLibrary->GetIp(param, tname); - fPtPara = 0; - fYPara = 0; - fParam = param; fAnalog = kAnalog; fChildSelect.Set(5); for (Int_t i=0; i<5; i++) fChildSelect[i]=0; @@ -220,27 +127,34 @@ AliGenParam::AliGenParam(Int_t npart, Int_t param, char* tname):AliGenMC(npart) SetChildPtRange(); SetChildPhiRange(); SetChildThetaRange(); - SetDeltaPt(); } +//____________________________________________________________ AliGenParam::AliGenParam(Int_t npart, Int_t param, Double_t (*PtPara) (Double_t*, Double_t*), Double_t (*YPara ) (Double_t* ,Double_t*), Int_t (*IpPara) (TRandom *)) - :AliGenMC(npart) + :AliGenMC(npart), + + fPtParaFunc(PtPara), + fYParaFunc(YPara), + fIpParaFunc(IpPara), + fPtPara(0), + fYPara(0), + fParam(param), + fdNdy0(0.), + fYWgt(0.), + fPtWgt(0.), + fBias(0.), + fTrials(0), + fDeltaPt(0.01), + fDecayer(0) { // Constructor // Gines Martinez 1/10/99 fName = "Param"; fTitle= "Particle Generator using pT and y parameterisation"; - fPtParaFunc = PtPara; - fYParaFunc = YPara; - fIpParaFunc = IpPara; -// - fPtPara = 0; - fYPara = 0; - fParam = param; fAnalog = kAnalog; fChildSelect.Set(5); for (Int_t i=0; i<5; i++) fChildSelect[i]=0; @@ -250,14 +164,6 @@ AliGenParam::AliGenParam(Int_t npart, Int_t param, SetChildPtRange(); SetChildPhiRange(); SetChildThetaRange(); - SetDeltaPt(); -} - - -AliGenParam::AliGenParam(const AliGenParam & Param) -{ -// copy constructor - Param.Copy(*this); } //____________________________________________________________ @@ -279,16 +185,27 @@ void AliGenParam::Init() */ //End_Html - - fPtPara = new TF1("Pt-Parametrization",fPtParaFunc,fPtMin,fPtMax,0); + char name[256]; + sprintf(name, "pt-parameterisation for %s", GetName()); + + if (fPtPara) fPtPara->Delete(); + fPtPara = new TF1(name, fPtParaFunc, fPtMin, fPtMax,0); + gROOT->GetListOfFunctions()->Remove(fPtPara); // Set representation precision to 10 MeV - Int_t npx= Int_t((fPtMax-fPtMin)/fDeltaPt); + Int_t npx= Int_t((fPtMax - fPtMin) / fDeltaPt); fPtPara->SetNpx(npx); + + sprintf(name, "y-parameterisation for %s", GetName()); + if (fYPara) fYPara->Delete(); + fYPara = new TF1(name, fYParaFunc, fYMin, fYMax, 0); + gROOT->GetListOfFunctions()->Remove(fYPara); + - fYPara = new TF1("Y -Parametrization",fYParaFunc,fYMin,fYMax,0); - TF1* ptPara = new TF1("Pt-Parametrization",fPtParaFunc,0,15,0); - TF1* yPara = new TF1("Y -Parametrization",fYParaFunc,-6,6,0); + sprintf(name, "pt-for-%s", GetName()); + TF1 ptPara(name ,fPtParaFunc, 0, 15, 0); + sprintf(name, "y-for-%s", GetName()); + TF1 yPara(name, fYParaFunc, -6, 6, 0); // // dN/dy| y=0 @@ -298,9 +215,9 @@ void AliGenParam::Init() fdNdy0=fYParaFunc(&y1,&y2); // // Integral over generation region - Float_t intYS = yPara ->Integral(fYMin, fYMax); - Float_t intPt0 = ptPara->Integral(0,15); - Float_t intPtS = ptPara->Integral(fPtMin,fPtMax); + Float_t intYS = yPara.Integral(fYMin, fYMax,(Double_t*) 0x0,1.e-6); + Float_t intPt0 = ptPara.Integral(0,15,(Double_t *) 0x0,1.e-6); + Float_t intPtS = ptPara.Integral(fPtMin,fPtMax,(Double_t*) 0x0,1.e-6); Float_t phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi(); if (fAnalog == kAnalog) { fYWgt = intYS/fdNdy0; @@ -335,7 +252,9 @@ void AliGenParam::Generate() // // // Reinitialize decayer - fDecayer->Init(); + fDecayer->SetForceDecay(fForceDecay); + fDecayer->Init(); + // Float_t polar[3]= {0,0,0}; // Polarisation of the parent particle (for GEANT tracking) Float_t origin0[3]; // Origin of the generated parent particle (for GEANT tracking) @@ -365,10 +284,12 @@ void AliGenParam::Generate() Int_t ipa=0; // Generating fNpart particles + fNprimaries = 0; + while (ipaGetPartialBranchingRatio(iPart))*fParentWeight; TParticlePDG *particle = pDataBase->GetParticle(iPart); @@ -516,17 +437,19 @@ void AliGenParam::Generate() ipa++; // // Parent - SetTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp); + PushTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp); pParent[0] = nt; KeepTrack(nt); + fNprimaries++; + // // Decay Products // for (i = 1; i < np; i++) { if (pSelected[i]) { TParticle* iparticle = (TParticle *) particles->At(i); - Int_t kf = iparticle->GetPdgCode(); - Int_t ipa = iparticle->GetFirstMother()-1; + Int_t kf = iparticle->GetPdgCode(); + Int_t jpa = iparticle->GetFirstMother()-1; och[0] = origin0[0]+iparticle->Vx()/10; och[1] = origin0[1]+iparticle->Vy()/10; @@ -535,17 +458,18 @@ void AliGenParam::Generate() pc[1] = iparticle->Py(); pc[2] = iparticle->Pz(); - if (ipa > -1) { - iparent = pParent[ipa]; + if (jpa > -1) { + iparent = pParent[jpa]; } else { iparent = -1; } - SetTrack(fTrackIt*trackIt[i], iparent, kf, + PushTrack(fTrackIt * trackIt[i], iparent, kf, pc, och, polar, 0, kPDecay, nt, wgtch); pParent[i] = nt; KeepTrack(nt); + fNprimaries++; } // Selected } // Particle loop } // Decays by Lujet @@ -557,17 +481,38 @@ void AliGenParam::Generate() } // kinematic selection else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons) { - gAlice-> - SetTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); + gAlice->GetMCApp()-> + PushTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp); ipa++; + fNprimaries++; } break; } // while } // event loop + SetHighWaterMark(nt); + + AliGenEventHeader* header = new AliGenEventHeader("PARAM"); + header->SetPrimaryVertex(fVertex); + header->SetNProduced(fNprimaries); + AddHeader(header); +} +//____________________________________________________________________________________ +Float_t AliGenParam::GetRelativeArea(Float_t ptMin, Float_t ptMax, Float_t yMin, Float_t yMax, Float_t phiMin, Float_t phiMax) +{ +// +// Normalisation for selected kinematic region +// + Float_t ratio = + fPtPara->Integral(ptMin,ptMax,(Double_t *)0,1.e-6) / fPtPara->Integral( fPtPara->GetXmin(), fPtPara->GetXmax(),(Double_t *)0,1.e-6) * + fYPara->Integral(yMin,yMax,(Double_t *)0,1.e-6)/fYPara->Integral(fYPara->GetXmin(),fYPara->GetXmax(),(Double_t *)0,1.e-6) * + (phiMax-phiMin)/360.; + return TMath::Abs(ratio); } -void AliGenParam::Draw() +//____________________________________________________________________________________ + +void AliGenParam::Draw( const char * /*opt*/) { // // Draw the pT and y Distributions @@ -582,11 +527,6 @@ void AliGenParam::Draw() fYPara->GetHistogram()->SetXTitle("y"); } -AliGenParam& AliGenParam::operator=(const AliGenParam& rhs) -{ -// Assignment operator - return *this; -}