#include "AliESDEvent.h"
#include "AliESDtrack.h"
#include "AliITStrackV2.h"
-#include "AliITSRecPoint.h"
-#include "AliITStrackerMI.h"
#include "AliITSLoader.h"
#include "AliITSPident.h"
#include "AliITSSteerPid.h"
ClassImp(AliITSpidESD2)
//_________________________________________________________________________
- AliITSpidESD2::AliITSpidESD2():AliITSpidESD(),
-fTracker(0),
-fLoader(0),
-fSp(0)
-{ //
+AliITSpidESD2::AliITSpidESD2():
+ AliITSpidESD(),
+ fSp(0)
+{
// The main constructor
-}
-//_________________________________________________________________________
-AliITSpidESD2::AliITSpidESD2(AliITStrackerMI* tracker,AliITSLoader* loader):AliITSpidESD(),
-fTracker(0),
-fLoader(0),
-fSp(0)
-{ //
- // The main constructor
- fTracker=tracker;
- fLoader=loader;
fSp=new AliITSSteerPid();
fSp->InitLayer();
}
+
+
//_________________________________________________________________________
AliITSpidESD2::~AliITSpidESD2(){
//destructor
if(fSp)delete fSp;
-
}
+
+
//______________________________________________________________________
AliITSpidESD2::AliITSpidESD2(const AliITSpidESD2 &ob) :AliITSpidESD(ob),
-fTracker(ob.fTracker),
-fLoader(ob.fLoader),
fSp(ob.fSp)
{
// Copy constructor
-
}
+
//______________________________________________________________________
AliITSpidESD2& AliITSpidESD2::operator=(const AliITSpidESD2& ob ){
// Assignment operator
return *this;
}
-//_________________________________________________________________________
-Int_t AliITSpidESD2::MakePID(AliESDEvent *event)
-{
+
+//______________________________________________________________________
+void AliITSpidESD2::GetITSpidSingleTrack(AliESDtrack* esdtr, Double_t condprobfun[]){
+ // Method to calculate PID probabilities for a single track
+
+ Double_t dEdxsignal=esdtr->GetITSsignal();
+ Double_t momits=esdtr->GetP();
+ Double_t qclu[4];
+ esdtr->GetITSdEdxSamples(qclu);
+
+ Float_t qclucorr[8],nlay[8];
+ for(Int_t jj=0;jj<8;jj++){
+ if(jj<4 && qclu[jj]>0){
+ qclucorr[jj]=qclu[jj];
+ nlay[jj]=jj+2; // layers numbered from 0 to 5
+ }
+ else{
+ qclucorr[jj]=-1;
+ nlay[jj]=0;
+ }
+ }
+
+ Float_t prip=0.33;
+ Float_t prik=0.33;
+ Float_t pripi=0.33;
+ Float_t prie=0.;
+ AliITSPident mypid(momits,dEdxsignal,fSp,qclucorr,nlay,prip,prik,pripi,prie);
+ condprobfun[0]=mypid.GetProdCondFunPi();//el --PID in the ITS does not distinguish among Pi,el,mu
+ condprobfun[1]=mypid.GetProdCondFunPi();//mu
+ condprobfun[2]=mypid.GetProdCondFunPi();//pi
+ condprobfun[3]=mypid.GetProdCondFunK();//kaon
+ condprobfun[4]=mypid.GetProdCondFunPro();//pro
+ return;
+}
+
- //
+
+//_________________________________________________________________________
+Int_t AliITSpidESD2::MakePID(AliESDEvent *event){
// This function calculates the "detector response" PID probabilities
- //
- Double_t xr,par[5];
- AliITStrackV2* track=0;
- fLoader->LoadRecPoints();
- TTree *cTree=fLoader->TreeR();
- fTracker->LoadClusters(cTree);
- printf("==== Landau Fit PID ITS ====== \n");
+
Int_t ntrk=event->GetNumberOfTracks();
- Double_t momits;
- // for (Int_t i=0; i<ntrk; i++) {
+ const Int_t kns=AliPID::kSPECIES;
+ Double_t condprobfun[kns];
+
for (Int_t i=0; i<ntrk; i++) {
AliESDtrack *esdtr=event->GetTrack(i);
- if ((esdtr->GetStatus()&AliESDtrack::kITSin )==0)
+ if ((esdtr->GetStatus()&AliESDtrack::kITSin )==0){
if ((esdtr->GetStatus()&AliESDtrack::kITSout)==0) continue;
-
- track = new AliITStrackV2(*esdtr);
- Double_t dEdxsignal=track->GetdEdx();
- track->GetExternalParameters(xr,par);
- if (par[4]!=0) {
- Float_t lamb=TMath::ATan(par[3]);
- momits=1/(TMath::Abs(par[4])*TMath::Cos(lamb));
- }
- else {
- AliWarning("Null particle momentum in ITS");
- momits = 0.;
- }
- Double_t snp=track->GetSnp();
- Double_t tgl=track->GetTgl();
- const Int_t kns=AliPID::kSPECIES;
- Double_t condprobfun[kns];
- for(Int_t ii=0;ii<kns;ii++)condprobfun[ii]=0;
- Int_t cluind[12];
- for(Int_t ii=0;ii<12;ii++){
- cluind[ii]=track->GetClusterIndex(ii);
- }
- AliITSRecPoint* cluarr[12];
- Float_t qclu[8],qclucorr[8],nlay[8];
- for(Int_t ii=0;ii<8;ii++){
- qclu[ii]=0;
- qclucorr[ii]=0;
- nlay[ii]=0;
- }
- Int_t jj=0;
- cout<<"track = "<<i<<endl;
- for(Int_t ij=0;ij<12;ij++){
- cluind[ij]=track->GetClusterIndex(ij);
- cout<<cluind[ij]<<endl;
- if(cluind[ij]>0){
- cluarr[ij]=(AliITSRecPoint*)fTracker->GetCluster(cluind[ij]);
- Int_t lay=cluarr[ij]->GetLayer();
- cout<<"lay = "<<lay<<endl;
- if(lay>1){//sdd+ssd only
- qclu[jj]=cluarr[ij]->GetQ();
- qclucorr[jj]=qclu[jj]*TMath::Sqrt((1-snp*snp)/(1+tgl*tgl));
- nlay[jj]=lay;
- jj++;
- }
- else qclucorr[jj]=-1;
- }
}
-
- Float_t prip=0.33;
- Float_t prik=0.33;
- Float_t pripi=0.33;
- Float_t prie=0.;
- AliITSPident mypid(momits,dEdxsignal,fSp,qclucorr,nlay,prip,prik,pripi,prie);
- condprobfun[0]=mypid.GetProdCondFunPi();//el --PID in the ITS does not distinguish among Pi,el,mu
- condprobfun[1]=mypid.GetProdCondFunPi();//mu
- condprobfun[2]=mypid.GetProdCondFunPi();//pi
- condprobfun[3]=mypid.GetProdCondFunK();//kaon
- condprobfun[4]=mypid.GetProdCondFunPro();//pro
-
+ GetITSpidSingleTrack(esdtr,condprobfun);
esdtr->SetITSpid(condprobfun);
-
- delete track;
}
- fTracker->UnloadClusters();
- fLoader->UnloadRecPoints();
return 0;
}