// class AliResonanceKinkLikeSign
// Example of an analysis task for producing a like-sign background for resonances having at least one
// kaon-kink in their decay products.
-// Background is calculated from a negative kaon kink and a negative track.
+// Background is calculated from a positive kaon kink and a negative track.
//-----------------------------------------------------------------------------------------------------------------
#include "TChain.h"
#include "TVector3.h"
#include "TF1.h"
#include "TH1D.h"
+#include "TH2D.h"
#include <TDatabasePDG.h>
#include <TParticlePDG.h>
#include "TLorentzVector.h"
//________________________________________________________________________
AliResonanceKinkLikeSign::AliResonanceKinkLikeSign()
- : AliAnalysisTaskSE(), fESD(0), fListOfHistos(0), f1(0), f2(0), fNegKaonLikeSign(0)
+ : AliAnalysisTaskSE(), fESD(0), fListOfHistos(0), f1(0), f2(0), fPosKaonLikeSign(0), fLikeSignInvmassPt(0)
{
// Constructor
}
//________________________________________________________________________
AliResonanceKinkLikeSign::AliResonanceKinkLikeSign(const char *name)
- : AliAnalysisTaskSE(name), fESD(0), fListOfHistos(0), f1(0), f2(0), fNegKaonLikeSign(0)
+ : AliAnalysisTaskSE(name), fESD(0), fListOfHistos(0), f1(0), f2(0), fPosKaonLikeSign(0), fLikeSignInvmassPt(0)
{
// Constructor
//OpenFile(1); //uncomment for proof analysis
// for K*0(892)
- fNegKaonLikeSign=new TH1D("fNegKaonLikeSign"," ", 60,0.6,1.2);
+ fPosKaonLikeSign=new TH1D("fPosKaonLikeSign"," ", 60,0.6,1.2);
+ fLikeSignInvmassPt=new TH2D("fLikeSignInvmassPt"," ", 60,0.6,1.2, 100,0.0,10.0);
// for phi(1020)
- // fNegKaonLikeSign=new TH1D("fNegKaonLikeSign"," ", 70,0.99,1.088);
+ // fPosKaonLikeSign=new TH1D("fPosKaonLikeSign"," ", 70,0.99,1.088);
fListOfHistos=new TList();
- fListOfHistos->Add(fNegKaonLikeSign);
+ fListOfHistos->Add(fPosKaonLikeSign);
+ fListOfHistos->Add(fLikeSignInvmassPt);
}
continue;
}
- if (trackpos->GetSign() > 0) continue;
+ if (trackpos->GetSign() < 0) continue;
trackpos->GetPxPyPz(ptrackpos);
if(posTrackMom.Perp()<=0.25) continue;
- //Uncomment the following block if the Like Sign is made of K- kink + negative track
+ //Uncomment the following block if the Like Sign is made of K+ kink + positive track
- //Int_t indexKink=trackpos->GetKinkIndex(0);
- //Int_t kaonKinkFlag=0;
-// if(indexKink<0){
-//
-// AliESDkink *kink=fESD->GetKink(TMath::Abs(IndexKink)-1);
-// const TVector3 motherMfromKink(kink->GetMotherP());
-// const TVector3 daughterMKink(kink->GetDaughterP());
-// Float_t qt=kink->GetQt();
-//
-// Double_t maxDecAngKmu=f1->Eval(motherMfromKink.Mag(),0.,0.,0.);
-// Double_t maxDecAngpimu=f2->Eval(motherMfromKink.Mag(),0.,0.,0.);
-//
-// Float_t kinkAngle=TMath::RadToDeg()*kink->GetAngle(2);
-//
-// Float_t energyDaughterMu=TMath::Sqrt(daughterMKink.Mag()*daughterMKink.Mag()+0.105658*0.105658);
-// Float_t p1XM= motherMfromKink.Px();
-// Float_t p1YM= motherMfromKink.Py();
-// Float_t p1ZM= motherMfromKink.Pz();
-// Float_t p2XM= daughterMKink.Px();
-// Float_t p2YM= daughterMKink.Py();
-// Float_t p2ZM= daughterMKink.Pz();
-// Float_t p3Daughter=TMath::Sqrt(((p1XM-p2XM)*(p1XM-p2XM))+((p1YM-p2YM)*(p1YM-p2YM))+((p1ZM-p2ZM)*(p1ZM-p2ZM)));
-// Double_t invariantMassKmu= TMath::Sqrt((energyDaughterMu+p3Daughter)*(energyDaughterMu+p3Daughter)-motherMfromKink.Mag()*motherMfromKink.Mag());
-//
-// if((kinkAngle>maxDecAngpimu)&&(qt>0.05)&&(qt<0.25)&&((kink->GetR()>110.)&&(kink->GetR()<230.))&&(TMath::Abs(posTrackMom.Eta())<1.1)&&(invariantMassKmu<0.6)) {
-//
-// if(posTrackMom.Mag()<=1.1) {
-// kaonKinkFlag=1;
-// }
-// else
-// if (kinkAngle<maxDecAngKmu) {
-// kaonKinkFlag=1;
-// }
-// }
+ Int_t IndexKink=trackpos->GetKinkIndex(0);
+ Int_t kaonKinkFlag=0;
+ if(IndexKink<0){
+
+ AliESDkink *kink=fESD->GetKink(TMath::Abs(IndexKink)-1);
+ const TVector3 motherMfromKink(kink->GetMotherP());
+ const TVector3 daughterMKink(kink->GetDaughterP());
+ Float_t qt=kink->GetQt();
+
+ Double_t maxDecAngKmu=f1->Eval(motherMfromKink.Mag(),0.,0.,0.);
+ Double_t maxDecAngpimu=f2->Eval(motherMfromKink.Mag(),0.,0.,0.);
+
+ Float_t kinkAngle=TMath::RadToDeg()*kink->GetAngle(2);
+
+ Float_t energyDaughterMu=TMath::Sqrt(daughterMKink.Mag()*daughterMKink.Mag()+0.105658*0.105658);
+ Float_t p1XM= motherMfromKink.Px();
+ Float_t p1YM= motherMfromKink.Py();
+ Float_t p1ZM= motherMfromKink.Pz();
+ Float_t p2XM= daughterMKink.Px();
+ Float_t p2YM= daughterMKink.Py();
+ Float_t p2ZM= daughterMKink.Pz();
+ Float_t p3Daughter=TMath::Sqrt(((p1XM-p2XM)*(p1XM-p2XM))+((p1YM-p2YM)*(p1YM-p2YM))+((p1ZM-p2ZM)*(p1ZM-p2ZM)));
+ Double_t invariantMassKmu= TMath::Sqrt((energyDaughterMu+p3Daughter)*(energyDaughterMu+p3Daughter)-motherMfromKink.Mag()*motherMfromKink.Mag());
+
+ if((kinkAngle>maxDecAngpimu)&&(qt>0.05)&&(qt<0.25)&&((kink->GetR()>110.)&&(kink->GetR()<230.))&&(TMath::Abs(posTrackMom.Eta())<1.1)&&(invariantMassKmu<0.6)) {
+
+ if(posTrackMom.Mag()<=1.1) {
+ kaonKinkFlag=1;
+ }
+ else
+ if (kinkAngle<maxDecAngKmu) {
+ kaonKinkFlag=1;
+ }
+ }
+
+ } //End Kink Information
+
+ if(kaonKinkFlag==0) continue;
+ if(kaonKinkFlag==1) p4pos.SetVectM(posTrackMom,daughter1Mass);
+
+ // Comment the following statements till the "for" if the Like Sign of K+ kink + positive track is needed
+
+// UInt_t status=trackpos->GetStatus();
+// if((status&AliESDtrack::kTPCrefit)==0) continue;
+// if(trackpos->GetTPCclusters(0)<50) continue;
+// if((trackpos->GetTPCchi2()/trackpos->GetTPCclusters(0))>3.5) continue;
+// Double_t extCovPos[15];
+// trackpos->GetExternalCovariance(extCovPos);
+// if(extCovPos[0]>2) continue;
+// if(extCovPos[2]>2) continue;
+// if(extCovPos[5]>0.5) continue;
+// if(extCovPos[9]>0.5) continue;
+// if(extCovPos[14]>2) continue;
//
-// } //End Kink Information
-//
-// if(kaonKinkFlag==0) continue;
-// if(kaonKinkFlag==1) p4pos.SetVectM(posTrackMom,daughter1Mass);
-
- // Comment the following statements till the "for" if the Like Sign of K- kink + negative track is needed
-
- UInt_t status=trackpos->GetStatus();
- if((status&AliESDtrack::kTPCrefit)==0) continue;
- if(trackpos->GetTPCclusters(0)<50) continue;
- if((trackpos->GetTPCchi2()/trackpos->GetTPCclusters(0))>3.5) continue;
- Double_t extCovPos[15];
- trackpos->GetExternalCovariance(extCovPos);
- if(extCovPos[0]>2) continue;
- if(extCovPos[2]>2) continue;
- if(extCovPos[5]>0.5) continue;
- if(extCovPos[9]>0.5) continue;
- if(extCovPos[14]>2) continue;
-
- p4pos.SetVectM(posTrackMom,daughter1Mass);
+// p4pos.SetVectM(posTrackMom,daughter1Mass);
for (Int_t j=0; j<fESD->GetNumberOfTracks(); j++) {
if(iTracks==j) continue;
AliESDtrack* trackneg=fESD->GetTrack(j);
- if (trackneg->GetSign() > 0) continue;
+ if (trackneg->GetSign() < 0) continue;
trackneg->GetPxPyPz(ptrackneg);
Float_t negSigmaToVertex = GetSigmaToVertex(trackneg);
p4comb=p4pos;
p4comb+=p4neg;
- fNegKaonLikeSign->Fill(p4comb.M());
+ fPosKaonLikeSign->Fill(p4comb.M());
+ fLikeSignInvmassPt->Fill(p4comb.M(), p4comb.Vect().Pt());
} //inner track loop
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff