* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.31 2001/07/13 10:58:54 morsch
-- Some coded moved to AliGenMC
-- Improved handling of secondary vertices.
+/* $Id$ */
-Revision 1.30 2001/06/15 07:55:04 morsch
-Put only first generation decay products on the stack.
+// Class to generate particles from using paramtrized pT and y distributions.
+// Distributions are obtained from pointer to object of type AliGenLib.
+// (For example AliGenMUONlib)
+// Decays are performed using Pythia.
+// andreas.morsch@cern.ch
-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
-
-*/
-
-#include "AliGenParam.h"
-#include "AliDecayerPythia.h"
-#include "AliGenMUONlib.h"
-#include "AliRun.h"
-#include <TParticle.h>
-#include <TParticlePDG.h>
+#include <TCanvas.h>
+#include <TClonesArray.h>
#include <TDatabasePDG.h>
+#include <TF1.h>
+#include <TH1F.h>
#include <TLorentzVector.h>
+#include <TMath.h>
+#include <TParticle.h>
+#include <TParticlePDG.h>
+#include <TROOT.h>
+#include <TVirtualMC.h>
-#include <TF1.h>
+#include "AliDecayer.h"
+#include "AliGenMUONlib.h"
+#include "AliGenParam.h"
+#include "AliMC.h"
+#include "AliRun.h"
+#include "AliGenEventHeader.h"
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),
+ fSelectAll(kFALSE),
+ fDecayer(0)
{
-// Deafault constructor
- fPtPara = 0;
- fYPara = 0;
- fParam = 0;
- fAnalog = kAnalog;
- SetDeltaPt();
-//
-// Set random number generator
- sRandom = fRandom;
+// Default constructor
}
-
-AliGenParam::AliGenParam(Int_t npart, AliGenLib * Library, Int_t param, char* tname):AliGenMC(npart)
+//____________________________________________________________
+AliGenParam::AliGenParam(Int_t npart, const AliGenLib * Library, Int_t param, const 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),
+ fSelectAll(kFALSE),
+ fDecayer(0)
{
// Constructor using number of particles parameterisation id and library
-
- fPtParaFunc = Library->GetPt(param, tname);
- fYParaFunc = Library->GetY (param, tname);
- fIpParaFunc = Library->GetIp(param, tname);
-
- fPtPara = 0;
- fYPara = 0;
- fParam = param;
+ fName = "Param";
+ fTitle= "Particle Generator using pT and y parameterisation";
fAnalog = kAnalog;
SetForceDecay();
- SetDeltaPt();
-//
-// Set random number generator
- sRandom = fRandom;
}
-
//____________________________________________________________
-
-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),
+ fSelectAll(kFALSE),
+ fDecayer(0)
{
// Constructor using parameterisation id and number of particles
-//
+//
+ 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;
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*),
+ Double_t (*PtPara) (const Double_t*, const Double_t*),
+ Double_t (*YPara ) (const Double_t* ,const 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),
+ fSelectAll(kFALSE),
+ fDecayer(0)
{
// Constructor
// Gines Martinez 1/10/99
- fPtParaFunc = PtPara;
- fYParaFunc = YPara;
- fIpParaFunc = IpPara;
-//
- fPtPara = 0;
- fYPara = 0;
- fParam = param;
+ fName = "Param";
+ fTitle= "Particle Generator using pT and y parameterisation";
+
fAnalog = kAnalog;
fChildSelect.Set(5);
for (Int_t i=0; i<5; i++) fChildSelect[i]=0;
SetChildPtRange();
SetChildPhiRange();
SetChildThetaRange();
- SetDeltaPt();
-}
-
-
-AliGenParam::AliGenParam(const AliGenParam & Paramd)
-{
-// copy constructor
}
//____________________________________________________________
{
// Initialisation
- fDecayer = new AliDecayerPythia();
+ if (gMC) fDecayer = gMC->GetDecayer();
//Begin_Html
/*
<img src="picts/AliGenParam.gif">
*/
//End_Html
-
- fPtPara = new TF1("Pt-Parametrization",fPtParaFunc,fPtMin,fPtMax,0);
+ char name[256];
+ snprintf(name, 256, "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);
+
+ snprintf(name, 256, "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);
+ snprintf(name, 256, "pt-for-%s", GetName());
+ TF1 ptPara(name ,fPtParaFunc, 0, 15, 0);
+ snprintf(name, 256, "y-for-%s", GetName());
+ TF1 yPara(name, fYParaFunc, -6, 6, 0);
//
// dN/dy| y=0
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;
//
//
// 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)
+ Float_t time0; // Time0 of the generated parent particle
Float_t pt, pl, ptot; // Transverse, logitudinal and total momenta of the parent particle
Float_t phi, theta; // Phi and theta spherical angles of the parent particle momentum
Float_t p[3], pc[3],
och[3]; // Momentum, polarisation and origin of the children particles from lujet
- Float_t ty, xmt;
+ Double_t ty, xmt;
Int_t nt, i, j;
Float_t wgtp, wgtch;
Double_t dummy;
static TClonesArray *particles;
//
if(!particles) particles = new TClonesArray("TParticle",1000);
-
- static TDatabasePDG *pDataBase = new TDatabasePDG();
- if(!pDataBase) pDataBase = new TDatabasePDG();
+
+ TDatabasePDG *pDataBase = TDatabasePDG::Instance();
//
Float_t random[6];
// Calculating vertex position per event
for (j=0;j<3;j++) origin0[j]=fOrigin[j];
+ time0 = fTimeOrigin;
if(fVertexSmear==kPerEvent) {
Vertex();
for (j=0;j<3;j++) origin0[j]=fVertex[j];
+ time0 = fTime;
}
Int_t ipa=0;
// Generating fNpart particles
+ fNprimaries = 0;
+
while (ipa<fNpart) {
while(1) {
//
-// particle type
+// particle type
Int_t iPart = fIpParaFunc(fRandom);
fChildWeight=(fDecayer->GetPartialBranchingRatio(iPart))*fParentWeight;
TParticlePDG *particle = pDataBase->GetParticle(iPart);
Float_t am = particle->Mass();
-
+
Rndm(random,2);
//
// phi
phi=fPhiMin+random[0]*(fPhiMax-fPhiMin);
//
// y
- ty=Float_t(TMath::TanH(fYPara->GetRandom()));
+ ty = TMath::TanH(fYPara->GetRandom());
//
// pT
if (fAnalog == kAnalog) {
wgtch=fChildWeight*fPtParaFunc(& ptd, &dummy);
}
xmt=sqrt(pt*pt+am*am);
- if (TMath::Abs(ty)==1) ty=0;
- pl=xmt*ty/sqrt(1.-ty*ty);
+ if (TMath::Abs(ty)==1.) {
+ ty=0.;
+ Fatal("AliGenParam",
+ "Division by 0: Please check you rapidity range !");
+ }
+
+ pl=xmt*ty/sqrt((1.-ty)*(1.+ty));
theta=TMath::ATan2(pt,pl);
// Cut on theta
if(theta<fThetaMin || theta>fThetaMax) continue;
fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
}
+ Rndm(random,2);
+ time0 = fTimeOrigin + fOsigma[2]/TMath::Ccgs()*
+ TMath::Cos(2*random[0]*TMath::Pi())*
+ TMath::Sqrt(-2*TMath::Log(random[1]));
}
// Looking at fForceDecay :
// if fForceDecay == none Primary particle is tracked by GEANT
// (In the latest, make sure that GEANT actually does all the decays you want)
//
+ Bool_t decayed = kFALSE;
+
if (fForceDecay != kNoDecay) {
// Using lujet to decay particle
//
// select decay particles
Int_t np=fDecayer->ImportParticles(particles);
+
+ // Selecting GeometryAcceptance for particles fPdgCodeParticleforAcceptanceCut;
+ if (fGeometryAcceptance)
+ if (!CheckAcceptanceGeometry(np,particles)) continue;
Int_t ncsel=0;
Int_t* pFlag = new Int_t[np];
Int_t* pParent = new Int_t[np];
}
if (np >1) {
- TParticle* iparticle = (TParticle *) particles->At(0);
+ decayed = kTRUE;
+ TParticle* iparticle = 0;
Int_t ipF, ipL;
for (i = 1; i<np ; i++) {
trackIt[i] = 1;
// flagged particle
if (pFlag[i] == 1) {
- printf("\n deselected %d", i);
ipF = iparticle->GetFirstDaughter();
ipL = iparticle->GetLastDaughter();
if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1;
// flag decay products of particles with long life-time (c tau > .3 mum)
if (ks != 1) {
- TParticlePDG *particle = pDataBase->GetParticle(kf);
+// TParticlePDG *particle = pDataBase->GetParticle(kf);
Double_t lifeTime = fDecayer->GetLifetime(kf);
- Double_t mass = particle->Mass();
- Double_t width = particle->Width();
- printf("\n lifetime %d %e %e %e ", i, lifeTime, mass, width);
- if (lifeTime > (Double_t) 1.e-15) {
+// Double_t mass = particle->Mass();
+// Double_t width = particle->Width();
+ if (lifeTime > (Double_t) fMaxLifeTime) {
ipF = iparticle->GetFirstDaughter();
ipL = iparticle->GetLastDaughter();
if (ipF > 0) for (j=ipF-1; j<ipL; j++) pFlag[j]=1;
} // ks==1 ?
//
// children
- if (ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll && trackIt[i])
+
+ if ((ChildSelected(TMath::Abs(kf)) || fForceDecay == kAll || fSelectAll) && trackIt[i])
{
if (fCutOnChild) {
pc[0]=iparticle->Px();
ipa++;
//
// Parent
- SetTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp);
+
+
+ PushTrack(0, -1, iPart, p, origin0, polar, time0, kPPrimary, nt, wgtp, ((decayed)? 11 : 1));
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 ksc = iparticle->GetStatusCode();
+ Int_t jpa = iparticle->GetFirstMother()-1;
och[0] = origin0[0]+iparticle->Vx()/10;
och[1] = origin0[1]+iparticle->Vy()/10;
pc[1] = iparticle->Py();
pc[2] = iparticle->Pz();
- if (ipa > -1) {
- iparent = pParent[ipa];
+ if (jpa > -1) {
+ iparent = pParent[jpa];
} else {
iparent = -1;
}
- printf("\n SetTrack %d %d %d %d", i, kf, iparent, trackIt[i]);
- SetTrack(fTrackIt*trackIt[i], iparent, kf,
+
+ PushTrack(fTrackIt * trackIt[i], iparent, kf,
pc, och, polar,
- 0, kPDecay, nt, wgtch);
+ time0 + iparticle->T(), kPDecay, nt, wgtch, ksc);
pParent[i] = nt;
KeepTrack(nt);
- }
- }
+ fNprimaries++;
+ } // Selected
+ } // Particle loop
} // Decays by Lujet
-
+ particles->Clear();
if (pFlag) delete[] pFlag;
if (pParent) delete[] pParent;
if (pSelected) delete[] pSelected;
- if (trackIt) delete[] trackIt;
+ if (trackIt) delete[] trackIt;
} // 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,time0,kPPrimary,nt,wgtp, 1);
ipa++;
+ fNprimaries++;
}
break;
} // while
} // event loop
+
SetHighWaterMark(nt);
+
+ AliGenEventHeader* header = new AliGenEventHeader("PARAM");
+ header->SetPrimaryVertex(fVertex);
+ header->SetInteractionTime(fTime);
+ 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);
}
-AliGenParam& AliGenParam::operator=(const AliGenParam& rhs)
+//____________________________________________________________________________________
+
+void AliGenParam::Draw( const char * /*opt*/)
{
-// Assignment operator
- return *this;
+ //
+ // Draw the pT and y Distributions
+ //
+ TCanvas *c0 = new TCanvas("c0","Canvas 0",400,10,600,700);
+ c0->Divide(2,1);
+ c0->cd(1);
+ fPtPara->Draw();
+ fPtPara->GetHistogram()->SetXTitle("p_{T} (GeV)");
+ c0->cd(2);
+ fYPara->Draw();
+ fYPara->GetHistogram()->SetXTitle("y");
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff