/*
$Log$
+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
#include "AliGenPHOSlib.h"
#include "AliRun.h"
#include "AliPythia.h"
-#include <TDirectory.h>
-#include <TFile.h>
-#include <TTree.h>
-#include <stdlib.h>
#include <TParticle.h>
ClassImp(AliGenParam)
AliGenParam::AliGenParam()
:AliGenerator()
{
+// Constructor
fPtPara = 0;
fYPara = 0;
fParam = jpsi_p;
fAnalog = analog;
SetCutOnChild();
+ SetChildMomentumRange();
+ SetChildPtRange();
+ SetChildPhiRange();
+ SetChildThetaRange();
+ SetDeltaPt();
}
//____________________________________________________________
AliGenParam::AliGenParam(Int_t npart, Param_t param) :AliGenerator(npart)
{
+// Constructor
//
// fName="HMESONpara";
// fTitle="Heavy Mesons Parametrisation";
for (Int_t i=0; i<5; i++) fChildSelect[i]=0;
SetForceDecay();
SetCutOnChild();
+ SetChildMomentumRange();
+ SetChildPtRange();
+ SetChildPhiRange();
+ SetChildThetaRange();
+ SetDeltaPt();
}
AliGenParam::AliGenParam(Int_t npart, Param_t param,
Int_t (*IpPara) ())
:AliGenerator(npart)
{
+// Constructor
// Gines Martinez 1/10/99
fPtParaFunc = PtPara;
fYParaFunc = YPara;
for (Int_t i=0; i<5; i++) fChildSelect[i]=0;
SetForceDecay();
SetCutOnChild();
+ SetChildMomentumRange();
+ SetChildPtRange();
+ SetChildPhiRange();
+ SetChildThetaRange();
+ SetDeltaPt();
}
//____________________________________________________________
AliGenParam::~AliGenParam()
{
+// Destructor
delete fPtPara;
delete fYPara;
}
//____________________________________________________________
void AliGenParam::Init()
{
+// Initialisation
SetMC(new AliPythia());
fPythia= (AliPythia*) fgMCEvGen;
-
-// End of the test !!!
+
//Begin_Html
/*
<img src="picts/AliGenParam.gif">
*/
//End_Html
- fPtPara = new TF1("Pt-Parametrization",fPtParaFunc,fPtMin,fPtMax,0);
- 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);
+ fPtPara = new TF1("Pt-Parametrization",fPtParaFunc,fPtMin,fPtMax,0);
+// Set representation precision to 10 MeV
+ Int_t npx= Int_t((fPtMax-fPtMin)/fDeltaPt);
+
+ fPtPara->SetNpx(npx);
+
+ 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);
//
// dN/dy| y=0
- Double_t y1=0;
- Double_t y2=0;
-
- fdNdy0=fYParaFunc(&y1,&y2);
+ 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();
- if (fAnalog == analog) {
- fYWgt = IntYS/fdNdy0;
- fPtWgt = IntPtS/IntPt0;
- fParentWeight = fYWgt*fPtWgt*PhiWgt/fNpart;
- } else {
- fYWgt = IntYS/fdNdy0;
- fPtWgt = (fPtMax-fPtMin)/IntPt0;
- fParentWeight = fYWgt*fPtWgt*PhiWgt/fNpart;
- }
+ 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();
+ if (fAnalog == analog) {
+ fYWgt = intYS/fdNdy0;
+ fPtWgt = intPtS/intPt0;
+ fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart;
+ } else {
+ fYWgt = intYS/fdNdy0;
+ fPtWgt = (fPtMax-fPtMin)/intPt0;
+ fParentWeight = fYWgt*fPtWgt*phiWgt/fNpart;
+ }
//
// particle decay related initialization
- fPythia->DefineParticles();
+ fPythia->DefineParticles();
// semimuonic decays of charm and beauty
- fPythia->ForceDecay(fForceDecay);
+ fPythia->ForceDecay(fForceDecay);
//
switch (fForceDecay)
{
// 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))
+// 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))
//
-// printf("Generate !!!!!!!!!!!!!\n");
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)
Int_t ipa=0;
// Generating fNpart particles
while (ipa<fNpart) {
- while(1) {
+ while(1) {
//
// particle type
- Int_t Ipart = fIpParaFunc();
- fChildWeight=(fPythia->GetBraPart(Ipart))*fParentWeight;
- Float_t am=fPythia->GetPMAS(fPythia->LuComp(Ipart),1);
+ Int_t iPart = fIpParaFunc();
+ fChildWeight=(fPythia->GetBraPart(iPart))*fParentWeight;
+ Float_t am=fPythia->GetPMAS(fPythia->Lucomp(iPart),1);
gMC->Rndm(random,2);
//
// phi
xmt=sqrt(pt*pt+am*am);
pl=xmt*ty/sqrt(1.-ty*ty);
theta=TMath::ATan2(pt,pl);
+// Cut on theta
if(theta<fThetaMin || theta>fThetaMax) continue;
ptot=TMath::Sqrt(pt*pt+pl*pl);
+// Cut on momentum
if(ptot<fPMin || ptot>fPMax) continue;
p[0]=pt*TMath::Cos(phi);
p[1]=pt*TMath::Sin(phi);
}
// Looking at fForceDecay :
-// if fForceDecay != none Primary particle decays using
-// AliPythia and children are tracked by GEANT
+// 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)
+// if fForceDecay == none Primary particle is tracked by GEANT
+// (In the latest, make sure that GEANT actually does all the decays you want)
//
if (fForceDecay != nodecay) {
// Using lujet to decay particle
Float_t energy=TMath::Sqrt(ptot*ptot+am*am);
- fPythia->DecayParticle(Ipart,energy,theta,phi);
- // fPythia->LuList(1);
- //printf("origin0 %f %f %f\n",origin0[0],origin0[1],origin0[2]);
- //printf("fCutOnChild %d \n",fCutOnChild);
+ fPythia->DecayParticle(iPart,energy,theta,phi);
//
-// select muons
+// select decay particles
Int_t np=fPythia->ImportParticles(particles,"All");
- //printf("np %d \n",np);
Int_t ncsel=0;
for (i = 1; i<np; i++) {
TParticle * iparticle = (TParticle *) particles->At(i);
och[1]=origin0[1]+iparticle->Vy()/10;
och[2]=origin0[2]+iparticle->Vz()/10;
if (fCutOnChild) {
- Float_t PtChild=TMath::Sqrt(pc[0]*pc[0]+pc[1]*pc[1]);
- Float_t PChild=TMath::Sqrt(PtChild*PtChild+pc[2]*pc[2]);
- Float_t ThetaChild=TMath::ATan2(PtChild,pc[2]);
- Float_t PhiChild=TMath::ATan2(pc[1],pc[0])+TMath::Pi();
+ Float_t ptChild=TMath::Sqrt(pc[0]*pc[0]+pc[1]*pc[1]);
+ Float_t pChild=TMath::Sqrt(ptChild*ptChild+pc[2]*pc[2]);
+ Float_t thetaChild=TMath::ATan2(ptChild,pc[2]);
+ Float_t phiChild=TMath::ATan2(pc[1],pc[0]);
Bool_t childok =
- ((PtChild > fPtMin && PtChild <fPtMax) &&
- (PChild > fPMin && PChild <fPMax) &&
- (ThetaChild>fThetaMin && ThetaChild<fThetaMax) &&
- (PhiChild > fPhiMin && PhiChild <fPhiMax));
+ ((ptChild > fChildPtMin && ptChild <fChildPtMax) &&
+ (pChild > fChildPMin && pChild <fChildPMax) &&
+ (thetaChild > fChildThetaMin && thetaChild <fChildThetaMax) &&
+ (phiChild > fChildPhiMin && phiChild <fChildPhiMax));
if(childok)
{
pch[ncsel][0]=pc[0];
//
// parent
gAlice->
- SetTrack(0,-1,Ipart,p,origin0,polar,0,"Primary",nt,wgtp);
+ SetTrack(0,-1,iPart,p,origin0,polar,0,"Primary",nt,wgtp);
iparent=nt;
for (i=0; i< ncsel; i++) {
else // nodecay option, so parent will be tracked by GEANT (pions, kaons, eta, omegas, baryons)
{
gAlice->
- SetTrack(fTrackIt,-1,Ipart,p,origin0,polar,0,"Primary",nt,wgtp);
+ SetTrack(fTrackIt,-1,iPart,p,origin0,polar,0,"Primary",nt,wgtp);
ipa++;
}
break;
Bool_t AliGenParam::ChildSelected(Int_t ip)
{
+// True if particle is in list of selected children
for (Int_t i=0; i<5; i++)
{
if (fChildSelect[i]==ip) return kTRUE;
Bool_t AliGenParam::KinematicSelection(TParticle *particle)
{
+// Perform kinematic cuts
Float_t px=particle->Px();
Float_t py=particle->Py();
Float_t pz=particle->Pz();
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff