#include "AliAnalysisTaskOmegaPi0PiPi.h"
#include "TList.h"
#include "TH1.h"
#include "TH2.h"
#include "AliESDEvent.h"
#include "TRefArray.h"
#include "TLorentzVector.h"
#include "AliESDCaloCluster.h"
#include "AliESDv0.h"
#include "AliESDtrack.h"
#include "AliLog.h"
#include "TString.h"
#include "AliPHOSGeoUtils.h"
ClassImp(AliAnalysisTaskOmegaPi0PiPi)
AliAnalysisTaskOmegaPi0PiPi::AliAnalysisTaskOmegaPi0PiPi() :
AliAnalysisTaskSE(),fOutputContainer(0x0),fhM2piSel(0x0),fhDxy(0x0),fhMggSel(0x0),
fhImpXY(0x0),fhM3pi0to2(0x0),fhM3pi2to4(0x0),fhM3pi4to6(0x0),fhM3pi6to8(0x0),
fhM3pi8to10(0x0),fhM3pi10to12(0x0),fhM3pi12(0x0),fhM3pi0to8(0x0),fModules("123")
{
}
AliAnalysisTaskOmegaPi0PiPi::AliAnalysisTaskOmegaPi0PiPi(const char* name) :
AliAnalysisTaskSE(name),fOutputContainer(0x0),fhM2piSel(0x0),fhDxy(0x0),fhMggSel(0x0),
fhImpXY(0x0),fhM3pi0to2(0x0),fhM3pi2to4(0x0),fhM3pi4to6(0x0),fhM3pi6to8(0x0),
fhM3pi8to10(0x0),fhM3pi10to12(0x0),fhM3pi12(0x0),fhM3pi0to8(0x0),fModules("123")
{
DefineOutput(1,TList::Class());
}
AliAnalysisTaskOmegaPi0PiPi::~AliAnalysisTaskOmegaPi0PiPi()
{
if(fOutputContainer){
fOutputContainer->Delete() ;
delete fOutputContainer ;
}
}
void AliAnalysisTaskOmegaPi0PiPi::UserCreateOutputObjects()
{
fOutputContainer = new TList();
fhM2piSel = new TH1F("hM2pi_sel","V0 inv. mass, Dxy<2cm",100,0.,1.);
fOutputContainer->Add(fhM2piSel);
fhDxy = new TH1F("hDxy","Distance from V0 to primary vertex in XY-plane", 500, 0.,500.);
fOutputContainer->Add(fhDxy);
fhMggSel = new TH1F("hMgg_sel","Inv. mass of two clusters, pT>1GeV",100,0.,0.3);
fOutputContainer->Add(fhMggSel);
fhImpXY = new TH1F("hImpXY","Impact parameters in XY-plane",1000,0.,1.);
fOutputContainer->Add(fhImpXY);
fhM3pi0to2 = new TH2F("hM3pi_0_2","pTrack: 0-2GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi0to2);
fhM3pi2to4 = new TH2F("hM3pi_2_4","pTrack: 2-4GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi2to4);
fhM3pi4to6 = new TH2F("hM3pi_4_6","pTrack: 4-6GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi4to6);
fhM3pi6to8 = new TH2F("hM3pi_6_8","pTrack: 6-8GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi6to8);
fhM3pi8to10 = new TH2F("hM3pi_8_10","pTrack: 8-10GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi8to10);
fhM3pi10to12 = new TH2F("hM3pi_10_12","pTrack: 10-12GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi10to12);
fhM3pi12 = new TH2F("hM3pi_12","pTrack>12GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi12);
fhM3pi0to8 = new TH2F("hM3pi_0_8","pTrack: 0-8GeV",100,0.,10., 200,0.4,1.);
fOutputContainer->Add(fhM3pi0to8);
}
void AliAnalysisTaskOmegaPi0PiPi::UserExec(Option_t* )
{
AliVEvent* event = InputEvent();
AliESDEvent* esd = (AliESDEvent*)event ;
Double_t v[3] ;
esd->GetVertex()->GetXYZ(v) ;
TVector3 vtx(v);
AliDebug(2,Form("Vertex: (%.3f,%.3f,%.3f)\n",vtx.X(),vtx.Y(),vtx.Z()));
TRefArray * caloClustersArr = new TRefArray();
esd->GetPHOSClusters(caloClustersArr);
const Int_t kNumberOfTracks = esd->GetNumberOfTracks();
const Int_t kNumberOfV0s = esd->GetNumberOfV0s();
AliDebug(2,Form("Tracks: %d. V0s: %d\n",kNumberOfTracks,kNumberOfV0s));
Float_t xyImp,zImp,imp1,imp2;
const Int_t kNumberOfPhosClusters = caloClustersArr->GetEntries() ;
AliDebug(2,Form("CaloClusters: %d\n", kNumberOfPhosClusters));
if(kNumberOfPhosClusters<2){
delete caloClustersArr;
return;
}
TLorentzVector pc1;
TLorentzVector pc2;
TLorentzVector pc12;
TLorentzVector ppos;
TLorentzVector pneg;
TLorentzVector ptr12;
TLorentzVector pomega;
Double_t etrack;
Double_t p1,p2;
Int_t relid[4] ;
UShort_t *absIds;
Int_t minCells=3;
const Double_t kMpi = 0.1396;
AliPHOSGeoUtils* geom = new AliPHOSGeoUtils("IHEP","");
for(Int_t iClu=0; iClu<kNumberOfPhosClusters; iClu++) {
AliESDCaloCluster *c1 = (AliESDCaloCluster *) caloClustersArr->At(iClu);
if(c1->GetNCells()<minCells) continue;
absIds = c1->GetCellsAbsId();
geom->AbsToRelNumbering(absIds[0], relid) ;
TString phosMod1;
phosMod1 += relid[0];
if(!fModules.Contains(phosMod1.Data())) continue;
c1->GetMomentum(pc1,v);
for (Int_t jClu=iClu; jClu<kNumberOfPhosClusters; jClu++) {
AliESDCaloCluster *c2 = (AliESDCaloCluster *) caloClustersArr->At(jClu);
if(c2->IsEqual(c1)) continue;
if(c2->GetNCells()<minCells) continue;
absIds = c2->GetCellsAbsId();
geom->AbsToRelNumbering(absIds[0], relid) ;
TString phosMod2;
phosMod2 += relid[0];
if(!fModules.Contains(phosMod2.Data())) continue;
c2->GetMomentum(pc2,v);
pc12 = pc1+pc2;
AliDebug(2,Form("pc12.M(): %.3f\n",pc12.M()));
if(pc12.M()<0.100 || pc12.M()>0.160) continue;
if(pc12.Pt()<1.5) continue;
fhMggSel->Fill(pc12.M());
for(Int_t iTrack=0; iTrack<kNumberOfTracks; iTrack++) {
AliESDtrack* tr1 = esd->GetTrack(iTrack);
p1 = tr1->P();
tr1->GetImpactParameters(xyImp,zImp);
imp1 = TMath::Abs(xyImp);
fhImpXY->Fill(imp1);
Short_t charge = tr1->Charge();
if(imp1>0.004) continue;
etrack = TMath::Sqrt(p1*p1 + kMpi*kMpi);
ppos.SetPxPyPzE(tr1->Px(),tr1->Py(),tr1->Pz(),etrack);
for(Int_t jTrack=iTrack; jTrack<kNumberOfTracks; jTrack++) {
AliESDtrack* tr2 = esd->GetTrack(jTrack);
p2 = tr2->P();
if(tr2->Charge()==charge) continue;
tr2->GetImpactParameters(xyImp,zImp);
imp2=TMath::Abs(xyImp);
if(imp2>0.004) continue;
etrack = TMath::Sqrt(p2*p2 + kMpi*kMpi);
pneg.SetPxPyPzE(tr2->Px(),tr2->Py(),tr2->Pz(),etrack);
ptr12 = ppos + pneg;
pomega = pc12 + ptr12;
AliDebug(2,Form("pomega.M(): %f\n",pomega.M()));
if( p1<2. && p2<2. )
fhM3pi0to2->Fill(pomega.Pt(),pomega.M());
if( (p1>=2. && p1<4.) && (p2>=2. && p2<4.) )
fhM3pi2to4->Fill(pomega.Pt(),pomega.M());
if( (p1>=4. && p1<6.) && (p2>=4. && p2<6.) )
fhM3pi4to6->Fill(pomega.Pt(),pomega.M());
if( (p1>=6. && p1<8.) && (p2>=6. && p2<8.) )
fhM3pi6to8->Fill(pomega.Pt(),pomega.M());
if( (p1>=8. && p1<10.) && (p2>=8. && p2<10.) )
fhM3pi8to10->Fill(pomega.Pt(),pomega.M());
if( (p1>=10. && p1<12.) && (p2>=10. && p2<12.) )
fhM3pi10to12->Fill(pomega.Pt(),pomega.M());
if( (p1>=12.) && (p2>=12.) )
fhM3pi12->Fill(pomega.Pt(),pomega.M());
if( p1<8. && p2<8. )
fhM3pi0to8->Fill(pomega.Pt(),pomega.M());
}
}
for(Int_t iVert=0; iVert<kNumberOfV0s; iVert++) {
AliESDv0* v0 = esd->GetV0(iVert);
AliESDtrack* ptrack = esd->GetTrack(v0->GetPindex());
AliESDtrack* ntrack = esd->GetTrack(v0->GetNindex());
etrack = TMath::Sqrt(ptrack->P()*ptrack->P() + kMpi*kMpi);
ppos.SetPxPyPzE(ptrack->Px(),ptrack->Py(),ptrack->Pz(),etrack);
etrack = TMath::Sqrt(ntrack->P()*ntrack->P() + kMpi*kMpi);
pneg.SetPxPyPzE(ntrack->Px(),ntrack->Py(),ntrack->Pz(),etrack);
ptr12 = ppos + pneg;
Double_t dx = vtx.X() - v0->Xv();
Double_t dy = vtx.Y() - v0->Yv();
Double_t dxy = TMath::Sqrt(dx*dx + dy*dy);
fhDxy->Fill(dxy);
AliDebug(2,Form("V0: dxy=%.3f\n",dxy));
if(dxy<2.) fhM2piSel->Fill(ptr12.M());
}
}
}
delete caloClustersArr;
PostData(1,fOutputContainer);
}
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