// Decays are performed using Pythia.
// andreas.morsch@cern.ch
-#include "AliGenParam.h"
-#include "AliDecayer.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 <TCanvas.h>
-#include <TH1.h>
-#include <TMath.h>
+#include "AliDecayer.h"
+#include "AliGenMUONlib.h"
+#include "AliGenParam.h"
#include "AliMC.h"
+#include "AliRun.h"
+#include "AliGenEventHeader.h"
ClassImp(AliGenParam)
//------------------------------------------------------------
- //Begin_Html
- /*
+//Begin_Html
+/*
<img src="picts/AliGenParam.gif">
- */
- //End_Html
+*/
+//End_Html
//____________________________________________________________
AliGenParam::AliGenParam()
+: fPtParaFunc(0),
+ fYParaFunc(0),
+ fIpParaFunc(0),
+ fV2ParaFunc(0),
+ fPtPara(0),
+ fYPara(0),
+ fV2Para(0),
+ fdNdPhi(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();
- fDecayer = 0;
-
-
+ // 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)),
+ fV2ParaFunc(Library->GetV2(param, tname)),
+ fPtPara(0),
+ fYPara(0),
+ fV2Para(0),
+ fdNdPhi(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
+ // 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, const char* tname, const char* name):AliGenMC(npart)
+AliGenParam::AliGenParam(Int_t npart, Int_t param, const char* tname, const char* name):
+ AliGenMC(npart),
+ fPtParaFunc(0),
+ fYParaFunc (0),
+ fIpParaFunc(0),
+ fV2ParaFunc(0),
+ fPtPara(0),
+ fYPara(0),
+ fV2Para(0),
+ fdNdPhi(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";
+ // 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);
+ fV2ParaFunc = pLibrary->GetV2(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*),
+ Double_t (*V2Para) (const Double_t* ,const Double_t*),
Int_t (*IpPara) (TRandom *))
- :AliGenMC(npart)
+ :AliGenMC(npart),
+
+ fPtParaFunc(PtPara),
+ fYParaFunc(YPara),
+ fIpParaFunc(IpPara),
+ fV2ParaFunc(V2Para),
+ fPtPara(0),
+ fYPara(0),
+ fV2Para(0),
+ fdNdPhi(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
+ // 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;
SetChildPtRange();
SetChildPhiRange();
SetChildThetaRange();
- SetDeltaPt();
-}
-
-
-AliGenParam::AliGenParam(const AliGenParam & Param)
- :AliGenMC(Param)
-{
-// Copy constructor
- Param.Copy(*this);
}
//____________________________________________________________
AliGenParam::~AliGenParam()
{
-// Destructor
+ // Destructor
delete fPtPara;
delete fYPara;
+ delete fV2Para;
+ delete fdNdPhi;
}
//____________________________________________________________
void AliGenParam::Init()
{
-// Initialisation
+ // Initialisation
if (gMC) fDecayer = gMC->GetDecayer();
//Begin_Html
*/
//End_Html
char name[256];
- sprintf(name, "pt-parameterisation for %s", GetName());
+ snprintf(name, 256, "pt-parameterisation for %s", GetName());
if (fPtPara) fPtPara->Delete();
fPtPara = new TF1(name, fPtParaFunc, fPtMin, fPtMax,0);
-// Set representation precision to 10 MeV
+ gROOT->GetListOfFunctions()->Remove(fPtPara);
+ // Set representation precision to 10 MeV
Int_t npx= Int_t((fPtMax - fPtMin) / fDeltaPt);
fPtPara->SetNpx(npx);
- sprintf(name, "y-parameterisation for %s", GetName());
+ snprintf(name, 256, "y-parameterisation for %s", GetName());
if (fYPara) fYPara->Delete();
fYPara = new TF1(name, fYParaFunc, fYMin, fYMax, 0);
+ gROOT->GetListOfFunctions()->Remove(fYPara);
+
+ snprintf(name, 256, "v2-parameterisation for %s", GetName());
+ if (fV2Para) fV2Para->Delete();
+ fV2Para = new TF1(name, fV2ParaFunc, fPtMin, fPtMax, 0);
+ // fV2Para = new TF1(name, "2*[0]/(1+TMath::Exp([1]*([2]-x)))-[0]", fPtMin, fPtMax);
+ // fV2Para->SetParameter(0, 0.236910);
+ // fV2Para->SetParameter(1, 1.71122);
+ // fV2Para->SetParameter(2, 0.0827617);
+ //gROOT->GetListOfFunctions()->Remove(fV2Para); //TR: necessary?
+
+ snprintf(name, 256, "dNdPhi for %s", GetName());
+ if (fdNdPhi) fdNdPhi->Delete();
+ fdNdPhi = new TF1(name, "1+2*[0]*TMath::Cos(2*(x-[1]))", fPhiMin, fPhiMax);
+ //gROOT->GetListOfFunctions()->Remove(fdNdPhi); //TR: necessary?
- sprintf(name, "pt-for-%s", GetName());
+ snprintf(name, 256, "pt-for-%s", GetName());
TF1 ptPara(name ,fPtParaFunc, 0, 15, 0);
- sprintf(name, "y-for-%s", GetName());
+ snprintf(name, 256, "y-for-%s", GetName());
TF1 yPara(name, fYParaFunc, -6, 6, 0);
-//
-// dN/dy| y=0
+ //
+ // dN/dy| y=0
Double_t y1=0;
Double_t y2=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 phiWgt=(fPhiMax-fPhiMin)/2./TMath::Pi();
+ //
+ // Integral over generation region
+ 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(); //TR: should probably be done differently in case of anisotropic phi...
if (fAnalog == kAnalog) {
fYWgt = intYS/fdNdy0;
fPtWgt = intPtS/intPt0;
fPtWgt = (fPtMax-fPtMin)/intPt0;
fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart;
}
-//
-// particle decay related initialization
+ //
+ // particle decay related initialization
fDecayer->SetForceDecay(fForceDecay);
fDecayer->Init();
-//
+ //
AliGenMC::Init();
}
//____________________________________________________________
void AliGenParam::Generate()
{
-//
-// Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion,
-// Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and
-// antineutrons in the the desired theta, phi and momentum windows;
-// Gaussian smearing on the vertex is done if selected.
-// The decay of heavy mesons is done using lujet,
-// and the childern particle are tracked by GEANT
-// However, light mesons are directly tracked by GEANT
-// setting fForceDecay = nodecay (SetForceDecay(nodecay))
-//
-//
-// Reinitialize decayer
+ //
+ // Generate 'npart' of light and heavy mesons (J/Psi, upsilon or phi, Pion,
+ // Kaons, Etas, Omegas) and Baryons (proton, antiprotons, neutrons and
+ // antineutrons in the the desired theta, phi and momentum windows;
+ // Gaussian smearing on the vertex is done if selected.
+ // The decay of heavy mesons is done using lujet,
+ // and the childern particle are tracked by GEANT
+ // However, light mesons are directly tracked by GEANT
+ // setting fForceDecay = nodecay (SetForceDecay(nodecay))
+ //
+ //
+ // Reinitialize decayer
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],
//
Float_t random[6];
-// Calculating vertex position per event
+ // 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
+ // 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
+ //
+ // y
ty = TMath::TanH(fYPara->GetRandom());
-//
-// pT
+ //
+ // pT
if (fAnalog == kAnalog) {
pt=fPtPara->GetRandom();
wgtp=fParentWeight;
Fatal("AliGenParam",
"Division by 0: Please check you rapidity range !");
}
+ //
+ // phi
+ // if(!ipa)
+ // phi=fEvPlane; //align first particle of each event with event plane
+ // else{
+ double v2 = fV2Para->Eval(pt);
+ fdNdPhi->SetParameter(0,v2);
+ fdNdPhi->SetParameter(1,fEvPlane);
+ phi=fdNdPhi->GetRandom();
+ // }
- pl=xmt*ty/sqrt(1.-ty*ty);
+ pl=xmt*ty/sqrt((1.-ty)*(1.+ty));
theta=TMath::ATan2(pt,pl);
-// Cut on theta
+ // Cut on theta
if(theta<fThetaMin || theta>fThetaMax) continue;
ptot=TMath::Sqrt(pt*pt+pl*pl);
-// Cut on momentum
+ // Cut on momentum
if(ptot<fPMin || ptot>fPMax) continue;
-//
+ //
p[0]=pt*TMath::Cos(phi);
p[1]=pt*TMath::Sin(phi);
p[2]=pl;
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 decays using
-// AliPythia and children are tracked by GEANT
-//
-// if fForceDecay == none Primary particle is tracked by GEANT
-// (In the latest, make sure that GEANT actually does all the decays you want)
-//
+ // Looking at fForceDecay :
+ // if fForceDecay != none Primary particle decays using
+ // AliPythia and children are tracked by GEANT
+ //
+ // 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
+ // Using lujet to decay particle
Float_t energy=TMath::Sqrt(ptot*ptot+am*am);
TLorentzVector pmom(p[0], p[1], p[2], energy);
fDecayer->Decay(iPart,&pmom);
-//
-// select decay particles
+ //
+ // select decay particles
Int_t np=fDecayer->ImportParticles(particles);
// Selecting GeometryAcceptance for particles fPdgCodeParticleforAcceptanceCut;
}
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;
iparticle = (TParticle *) particles->At(i);
Int_t kf = iparticle->GetPdgCode();
Int_t ks = iparticle->GetStatusCode();
-// flagged particle
+ // flagged particle
if (pFlag[i] == 1) {
ipF = iparticle->GetFirstDaughter();
continue;
}
-// flag decay products of particles with long life-time (c tau > .3 mum)
+ // 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();
+ // Double_t mass = particle->Mass();
+ // Double_t width = particle->Width();
if (lifeTime > (Double_t) fMaxLifeTime) {
ipF = iparticle->GetFirstDaughter();
ipL = iparticle->GetLastDaughter();
pSelected[i] = 1;
}
} // ks==1 ?
-//
-// children
+ //
+ // 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();
Int_t iparent;
if ((fCutOnChild && ncsel >0) || !fCutOnChild){
ipa++;
-//
-// Parent
- PushTrack(0, -1, iPart, p, origin0, polar, 0, kPPrimary, nt, wgtp);
+ //
+ // Parent
+
+
+ PushTrack(0, -1, iPart, p, origin0, polar, time0, kPPrimary, nt, wgtp, ((decayed)? 11 : 1));
pParent[0] = nt;
KeepTrack(nt);
-//
-// Decay Products
-//
+ 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;
- och[2] = origin0[2]+iparticle->Vz()/10;
+ och[0] = origin0[0]+iparticle->Vx();
+ och[1] = origin0[1]+iparticle->Vy();
+ och[2] = origin0[2]+iparticle->Vz();
pc[0] = iparticle->Px();
pc[1] = iparticle->Py();
pc[2] = iparticle->Pz();
- if (ipa > -1) {
- iparent = pParent[ipa];
+ if (jpa > -1) {
+ iparent = pParent[jpa];
} else {
iparent = -1;
}
- PushTrack(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
else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons)
{
gAlice->GetMCApp()->
- PushTrack(fTrackIt,-1,iPart,p,origin0,polar,0,kPPrimary,nt,wgtp);
+ 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
-//
+ //
+ // Normalisation for selected kinematic region
+ //
Float_t ratio =
- fPtPara->Integral(ptMin,ptMax) / fPtPara->Integral( fPtPara->GetXmin(), fPtPara->GetXmax()) *
- fYPara->Integral(yMin,yMax)/fYPara->Integral(fYPara->GetXmin(),fYPara->GetXmax()) *
+ 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);
}
fYPara->GetHistogram()->SetXTitle("y");
}
-AliGenParam& AliGenParam::operator=(const AliGenParam& rhs)
-{
-// Assignment operator
- rhs.Copy(*this);
- return *this;
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff