#include "AliGenBox.h"
#include "AliRun.h"
#include "AliGenEventHeader.h"
+#include "TDatabasePDG.h"
+#include "AliPDG.h"
ClassImp(AliGenBox)
//_____________________________________________________________________________
-void AliGenBox::Generate()
+void AliGenBox::Generate() {
+ //
+ // Generate one trigger (fNpart particles)
+ //
+ GenerateN(1);
+}
+
+//_____________________________________________________________________________
+void AliGenBox::GenerateN(Int_t ntimes)
{
//
- // Generate one trigger
+ // Generate ntimes triggers
+ // total ntimes*fNpart particles
//
Float_t polar[3]= {0,0,0};
//
Float_t origin[3];
+ Float_t time;
Float_t p[3];
Int_t i, j, nt;
Double_t pmom, theta, phi, pt;
+ Double_t y, mt;
//
Float_t random[6];
//
for (j=0;j<3;j++) origin[j]=fOrigin[j];
+ time = fTimeOrigin;
if(fVertexSmear==kPerEvent) {
Vertex();
for (j=0;j<3;j++) origin[j]=fVertex[j];
+ time = fTime;
}
- for(i=0;i<fNpart;i++) {
+ Double_t m = TDatabasePDG::Instance()->GetParticle(fIpart)->Mass();
+
+ Int_t mult = fNpart*ntimes;
+ for(i=0;i<mult;i++) {
Rndm(random,3);
- if (TestBit(kThetaRange)) {
- theta = fThetaMin+random[0]*(fThetaMax-fThetaMin);
- } else {
- Float_t eta = fEtaMin+random[0]*(fEtaMax-fEtaMin);
- theta = 2. * TMath::ATan(TMath::Exp(-eta));
- }
-
-
- if(TestBit(kMomentumRange)) {
- pmom=fPMin+random[1]*(fPMax-fPMin);
- pt=pmom*TMath::Sin(theta);
+ if (TestBit(kYRange)) {
+ y = fYMin+random[0]*(fYMax-fYMin);
+
+ if(TestBit(kMomentumRange)) {
+ pmom=fPMin+random[1]*(fPMax-fPMin);
+ mt = TMath::Sqrt(pmom*pmom+m*m)/TMath::CosH(y);
+ pt = TMath::Sqrt(mt*mt - m*m);
+ } else {
+ pt=fPtMin+random[1]*(fPtMax-fPtMin);
+ mt=TMath::Sqrt(pt*pt+m*m);
+ }
+
+ phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
+ p[0] = pt*TMath::Cos(phi);
+ p[1] = pt*TMath::Sin(phi);
+ p[2] = mt*TMath::SinH(y);
} else {
+ if (TestBit(kThetaRange)) {
+ theta = fThetaMin+random[0]*(fThetaMax-fThetaMin);
+ } else {
+ Float_t eta = fEtaMin+random[0]*(fEtaMax-fEtaMin);
+ theta = 2. * TMath::ATan(TMath::Exp(-eta));
+ }
+
+ if(TestBit(kMomentumRange)) {
+ pmom=fPMin+random[1]*(fPMax-fPMin);
+ pt=pmom*TMath::Sin(theta);
+ } else {
- pt=fPtMin+random[1]*(fPtMax-fPtMin);
- pmom=pt/TMath::Sin(theta);
- }
+ pt=fPtMin+random[1]*(fPtMax-fPtMin);
+ pmom=pt/TMath::Sin(theta);
+ }
- phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
- p[0] = pt*TMath::Cos(phi);
- p[1] = pt*TMath::Sin(phi);
- p[2] = pmom*TMath::Cos(theta);
+ phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
+ p[0] = pt*TMath::Cos(phi);
+ p[1] = pt*TMath::Sin(phi);
+ p[2] = pmom*TMath::Cos(theta);
+ }
if(fVertexSmear==kPerTrack) {
Rndm(random,6);
origin[j]=fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
}
+
+ Rndm(random,2);
+ time = fTimeOrigin + fOsigma[2]/TMath::Ccgs()*
+ TMath::Cos(2*random[0]*TMath::Pi())*
+ TMath::Sqrt(-2*TMath::Log(random[1]));
}
- PushTrack(fTrackIt,-1,fIpart,p,origin,polar,0,kPPrimary,nt);
+ PushTrack(fTrackIt,-1,fIpart,p,origin,polar,time,kPPrimary,nt);
}
AliGenEventHeader* header = new AliGenEventHeader("BOX");
header->SetPrimaryVertex(fVertex);
- header->SetNProduced(fNpart);
+ header->SetNProduced(mult);
+ header->SetInteractionTime(fTime);
// Passes header either to the container or to gAlice
if (fContainer) {
+ header->SetName(fName);
fContainer->AddHeader(header);
} else {
gAlice->SetGenEventHeader(header);
Fatal("Init","You should not set the momentum range and the pt range!\n");
if((!TestBit(kPtRange))&&(!TestBit(kMomentumRange)))
Fatal("Init","You should set either the momentum or the pt range!\n");
+ if((TestBit(kYRange)&&TestBit(kThetaRange)) || (TestBit(kYRange)&&TestBit(kEtaRange)) || (TestBit(kEtaRange)&&TestBit(kThetaRange)) )
+ Fatal("Init","You should only set the range of one of these variables: y, eta or theta\n");
+ if((!TestBit(kYRange)) && (!TestBit(kEtaRange)) && (!TestBit(kThetaRange)) )
+ Fatal("Init","You should set the range of one of these variables: y, eta or theta\n");
}