--- /dev/null
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+/*
+ * author: M.Kalisky@gsi.de
+ * 08/Dec/2010
+ *
+ * Description: This class allows with purely kinematical cuts
+ * to select clean samples of electrons, pions and protons from the
+ * V0 online finder AOD V0 candidates for PID and dectector resonse
+ * studies.
+ */
+
+#include <TVector3.h>
+#include <TDatabasePDG.h>
+#include <TPDGCode.h>
+#include <TParticlePDG.h>
+
+#include "AliAODv0.h"
+#include "AliAODTrack.h"
+#include "AliAODVertex.h"
+#include "AliAODEvent.h"
+#include "AliESDtrack.h"
+#include "AliVEvent.h"
+#include "AliLog.h"
+#include "AliKFParticle.h"
+#include "AliVTrack.h"
+#include "AliKFVertex.h"
+
+#include "AliAODv0KineCuts.h"
+
+ClassImp(AliAODv0KineCuts)
+
+//____________________________________________________________________
+AliAODv0KineCuts::AliAODv0KineCuts() :
+ fEvent(0x0)
+ , fPrimaryVertex(0x0)
+ , fType(0)
+ , fMode(0)
+ , fTPCNcls(30)
+ , fTPCrefit(kTRUE)
+ , fTPCclsRatio(0.6)
+ , fNoKinks(kTRUE)
+ , fKinkMotherList(1000)
+ , fNumberKinkMothers(0)
+ , fGcutChi2NDF(10)
+ , fGcutInvMass(0.05)
+ , fK0cutChi2NDF(10)
+ , fLcutChi2NDF(10)
+ , fUseExternalVertex(kFALSE)
+ , fDeleteVertex(kFALSE)
+{
+ //
+ // Default constructor
+ //
+
+ // default single track cuts
+ fTPCNcls = 30; // minimal number of the TPC clusters
+ fTPCrefit = kTRUE; // TPC refit
+ fTPCclsRatio = 0.6; // minimal foun/findable TPC cluster ratio
+ fNoKinks = kTRUE; // kinks - no [kTRUE] or do not care [kFalse]
+
+
+ // default gamma cuts values
+ fGcutChi2NDF = 10; // Chi2NF cut value for the AliKFparticle gamma
+ fGcutCosPoint[0] = 0; // cos of the pointing angle [min, max]
+ fGcutCosPoint[1] = 0.02; // cos of the pointing angle [min, max]
+ fGcutDCA[0] = 0.; // DCA between the daughter tracks [min, max]
+ fGcutDCA[1] = 0.25; // DCA between the daughter tracks [min, max]
+ fGcutVertexR[0] = 3.; // radius of the conversion point [min, max]
+ fGcutVertexR[1] = 90.; // radius of the conversion point [min, max]
+ fGcutPsiPair[0] = 0.; // value of the psi pair cut [min, max]
+ fGcutPsiPair[1] = 0.05; // value of the psi pair cut [min, max]
+ fGcutInvMass = 0.05; // upper value on the gamma invariant mass
+ // default K0 cuts
+ fK0cutChi2NDF = 10; // Chi2NF cut value for the AliKFparticle K0
+ fK0cutCosPoint[0] = 0.; // cos of the pointing angle [min, max]
+ fK0cutCosPoint[1] = 0.02; // cos of the pointing angle [min, max]
+ fK0cutDCA[0] = 0.; // DCA between the daughter tracks [min, max]
+ fK0cutDCA[1] = 0.2; // DCA between the daughter tracks [min, max]
+ fK0cutVertexR[0] = 2.0; // radius of the decay point [min, max]
+ fK0cutVertexR[1] = 30.0; // radius of the decay point [min, max]
+ fK0cutInvMass[0] = 0.486; // invariant mass window
+ fK0cutInvMass[1] = 0.508; // invariant mass window
+ // Lambda & anti-Lambda cut values
+ fLcutChi2NDF = 10; // Chi2NF cut value for the AliKFparticle K0
+ fLcutCosPoint[0] = 0.; // cos of the pointing angle [min, max]
+ fLcutCosPoint[1] = 0.02; // cos of the pointing angle [min, max]
+ fLcutDCA[0] = 0.; // DCA between the daughter tracks [min, max]
+ fLcutDCA[1] = 0.2; // DCA between the daughter tracks [min, max]
+ fLcutVertexR[0] = 2.0; // radius of the decay point [min, max]
+ fLcutVertexR[1] = 40.0; // radius of the decay point [min, max]
+ fLcutInvMass[0] = 1.11; // invariant mass window
+ fLcutInvMass[1] = 1.12; // invariant mass window
+
+}
+//____________________________________________________________________
+AliAODv0KineCuts::~AliAODv0KineCuts(){
+ //
+ // Destructor
+ //
+
+
+}
+//____________________________________________________________________
+AliAODv0KineCuts::AliAODv0KineCuts(const AliAODv0KineCuts &ref):
+ TObject(ref)
+ , fEvent(0x0)
+ , fPrimaryVertex(0x0)
+ , fType(0)
+ , fMode(0)
+ , fTPCNcls(30)
+ , fTPCrefit(kTRUE)
+ , fTPCclsRatio(0.6)
+ , fNoKinks(kTRUE)
+ , fKinkMotherList(ref.fKinkMotherList)
+ , fNumberKinkMothers(ref.fNumberKinkMothers)
+ , fGcutChi2NDF(10)
+ , fGcutInvMass(0.05)
+ , fK0cutChi2NDF(10)
+ , fLcutChi2NDF(10)
+ , fUseExternalVertex(kFALSE)
+ , fDeleteVertex(kFALSE)
+{
+ //
+ // Copy operator
+ //
+
+ ref.Copy(*this);
+}
+//____________________________________________________________________
+AliAODv0KineCuts &AliAODv0KineCuts::operator=(const AliAODv0KineCuts &ref){
+ //
+ // assignment operator
+ //
+ if(this != &ref)
+ ref.Copy(*this);
+ return *this;
+}
+//____________________________________________________________________
+void AliAODv0KineCuts::Copy(TObject &ref) const {
+ //
+ // Performs the copying of the object
+ //
+
+ TObject::Copy(ref);
+
+ AliAODv0KineCuts &target = dynamic_cast<AliAODv0KineCuts &>(ref);
+
+ // default single track cuts
+ target.fTPCNcls = fTPCNcls;
+ target.fTPCrefit = fTPCrefit;
+ target.fTPCclsRatio = fTPCclsRatio;
+ target.fNoKinks = fNoKinks;
+ target.fKinkMotherList = fKinkMotherList;
+ target.fNumberKinkMothers = fNumberKinkMothers;
+ target.fUseExternalVertex = fUseExternalVertex; //added december 2nd 2011
+ target.fDeleteVertex = fDeleteVertex; //added december 2nd 2011
+
+ // default gamma cuts values
+ target.fGcutChi2NDF = fGcutChi2NDF;
+ memcpy(target.fGcutCosPoint, fGcutCosPoint, sizeof(Float_t) * 2);
+ memcpy(target.fGcutDCA, fGcutDCA, sizeof(Float_t) * 2);
+ memcpy(target.fGcutVertexR, fGcutVertexR, sizeof(Float_t) * 2);
+ memcpy(target.fGcutPsiPair, fGcutPsiPair, sizeof(Float_t) * 2);
+ target.fGcutInvMass = fGcutInvMass;
+ // default K0 cuts
+ target.fK0cutChi2NDF = fK0cutChi2NDF;
+ memcpy(target.fK0cutCosPoint, fK0cutCosPoint, sizeof(Float_t) * 2);
+ memcpy(target.fK0cutDCA, fK0cutDCA, sizeof(Float_t) * 2);
+ memcpy(target.fK0cutVertexR, fK0cutVertexR, sizeof(Float_t) * 2);
+ memcpy(target.fK0cutInvMass, fK0cutInvMass, sizeof(Float_t) * 2);
+ // Lambda & anti-Lambda cut values
+ target.fLcutChi2NDF = fLcutChi2NDF;
+ memcpy(target.fLcutCosPoint, fLcutCosPoint, sizeof(Float_t) * 2);
+ memcpy(target.fLcutDCA, fLcutDCA, sizeof(Float_t) * 2);
+ memcpy(target.fLcutVertexR, fLcutVertexR, sizeof(Float_t) * 2);
+ memcpy(target.fLcutInvMass, fLcutInvMass, sizeof(Float_t) * 2);
+
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::ProcessV0(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN) const
+{
+ //
+ // main user function
+ //
+
+ if(!v0) return kFALSE;
+ if(!fEvent){
+ AliErrorClass("No valid Event pointer available, provide it first");
+ return kFALSE;
+ }
+
+ if(!V0CutsCommon(v0)) return kFALSE;
+
+ const Int_t id = PreselectV0(v0);
+
+ if(!SingleTrackCuts(v0)) return kFALSE;
+
+ switch(id){
+ case kUndef:
+ return kFALSE;
+ case kGamma:
+ return CaseGamma(v0, pdgV0, pdgP, pdgN);
+ case kK0:
+ return CaseK0(v0, pdgV0, pdgP, pdgN);
+ case kLambda:
+ return CaseLambda(v0, pdgV0, pdgP, pdgN, 0);
+ case kALambda:
+ return CaseLambda(v0, pdgV0, pdgP, pdgN, 1);
+ default:
+ return kFALSE;
+ }
+
+ return kFALSE;
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::ProcessV0(AliAODv0* const v0, Int_t &pdgP, Int_t &pdgN) const
+{
+ //
+ // main user function, simplified if the V0 identity is not necessary
+ //
+
+ if(!v0) return kFALSE;
+ if(!fEvent){
+ AliErrorClass("No valid Event pointer available, provide it first");
+ return kFALSE;
+ }
+
+ Int_t idV0 = -1;
+ return ProcessV0(v0, idV0, pdgP, pdgN);
+
+}
+//____________________________________________________________________
+Int_t AliAODv0KineCuts::PreselectV0(AliAODv0* const v0) const
+{
+ //
+ // Make a preselection (exclusive) of the V0 cadidates based on
+ // Armenteros plot
+ // the armenteros cut values are currently fixed and user is not able to set them via
+ // set funcions. The reason is that these cuts are optimized and furneter changes should
+ // not be necessary. To prove otherwise please study in detail before changing the values
+ //
+
+ // for clarity
+ const Float_t alpha =v0->AlphaV0(); //ap[0];
+ const Float_t qt = v0->PtArmV0();//ap[1];
+
+ // selection cuts
+ // - the reagions for different candidates must not overlap
+
+ // Gamma cuts
+ const Double_t cutAlphaG = 0.35;
+ const Double_t cutQTG = 0.05;
+ const Double_t cutAlphaG2[2] = {0.6, 0.8};
+ const Double_t cutQTG2 = 0.04;
+
+ // K0 cuts
+ const Float_t cutQTK0[2] = {0.1075, 0.215};
+ const Float_t cutAPK0[2] = {0.199, 0.8}; // parameters for curved QT cut
+
+ // Lambda & A-Lambda cuts
+ const Float_t cutQTL = 0.03;
+ const Float_t cutAlphaL[2] = {0.35, 0.7};
+ const Float_t cutAlphaAL[2] = {-0.7, -0.35};
+ const Float_t cutAPL[3] = {0.107, -0.69, 0.5}; // parameters fir curved QT cut
+
+
+ if(kPurity == fMode){
+ // Check for Gamma candidates
+ if(qt < cutQTG){
+ if( (TMath::Abs(alpha) < cutAlphaG) ) return kGamma;
+ }
+ // additional region - should help high pT gammas
+ if(qt < cutQTG2){
+ if( (TMath::Abs(alpha) > cutAlphaG2[0]) && (TMath::Abs(alpha) < cutAlphaG2[1]) ) return kGamma;
+ }
+ }
+ if(kEffGamma == fMode){
+ if(qt < cutQTG) return kGamma;
+ }
+
+
+ // Check for K0 candidates
+ Float_t q = cutAPK0[0] * TMath::Sqrt(TMath::Abs(1 - alpha*alpha/(cutAPK0[1]*cutAPK0[1])));
+ if( (qt > cutQTK0[0]) && (qt < cutQTK0[1]) && (qt > q) ){
+ return kK0;
+ }
+
+ // Check for Lambda candidates
+ q = cutAPL[0] * TMath::Sqrt(TMath::Abs(1 - ( (alpha + cutAPL[1]) * (alpha + cutAPL[1]) ) / (cutAPL[2]*cutAPL[2]) ));
+ if( (alpha > cutAlphaL[0]) && (alpha < cutAlphaL[1]) && (qt > cutQTL) && (qt < q) ){
+ return kLambda;
+ }
+
+ // Check for A-Lambda candidates
+ q = cutAPL[0] * TMath::Sqrt(TMath::Abs(1 - ( (alpha - cutAPL[1]) * (alpha - cutAPL[1]) ) / (cutAPL[2]*cutAPL[2]) ));
+ if( (alpha > cutAlphaAL[0]) && (alpha < cutAlphaAL[1]) && (qt > cutQTL) && (qt < q) ){
+ return kALambda;
+ }
+
+ return kUndef;
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::SingleTrackCuts(AliAODv0 * const v0) const
+{
+ //
+ // apply single track cuts
+ // correct sign not relevat here
+ //
+
+ if(!v0) return kFALSE;
+
+ AliAODTrack* d[2] = {
+ dynamic_cast<AliAODTrack*>(v0->GetSecondaryVtx()->GetDaughter(0)),
+ dynamic_cast<AliAODTrack*>(v0->GetSecondaryVtx()->GetDaughter(1))
+ };
+
+ for(Int_t i=0; i<2; ++i){
+ if(!d[i]) return kFALSE;
+
+ // status word
+ ULong_t status = d[i]->GetStatus();
+
+ // No. of TPC clusters leave to the users
+ if(d[i]->GetTPCNcls() < 1) return kFALSE;
+
+ // TPC refit
+ if(!(status & AliAODTrack::kTPCrefit)) return kFALSE;
+
+ // TPC cluster ratio
+ Float_t cRatioTPC = d[i]->GetTPCNclsF() > 0. ? static_cast<Float_t>(d[i]->GetTPCNcls())/static_cast<Float_t> (d[i]->GetTPCNclsF()) : 1.;
+ if(cRatioTPC < 0.6) return kFALSE;
+
+ // kinks
+ if(fNoKinks && (IsKinkDaughter(d[i]) || IsKinkMother(d[i]))) return kFALSE;
+
+ }
+
+ return kTRUE;
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::CaseGamma(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN) const
+{
+ //
+ // process the gamma conversion candidate
+ //
+
+ if(!v0) return kFALSE;
+
+ AliVTrack* daughter[2];
+ Int_t pIndex = 0, nIndex = 0;
+
+ Bool_t sign = CheckSigns(v0);
+ if(sign){
+ pIndex = 0;
+ nIndex = 1;
+ }
+ else{
+ pIndex = 1;
+ nIndex = 0;
+ }
+ daughter[0] = dynamic_cast<AliVTrack *>(v0->GetSecondaryVtx()->GetDaughter(pIndex));
+ daughter[1] = dynamic_cast<AliVTrack *>(v0->GetSecondaryVtx()->GetDaughter(nIndex));
+ if(!daughter[0] || !daughter[1]) return kFALSE;
+
+ AliKFParticle *kfMother = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kElectron), TMath::Abs(kElectron));
+ if(!kfMother) return kFALSE;
+
+// AliAODTrack* d[2];
+// d[0] = dynamic_cast<AliAODTrack*>(fEvent->GetTrack(pIndex));
+// d[1] = dynamic_cast<AliAODTrack*>(fEvent->GetTrack(nIndex));
+
+ Float_t iMass = v0->InvMass2Prongs(0,1,11,11);
+
+ // cos pointing angle
+ Double_t cosPoint = v0->CosPointingAngle(dynamic_cast<AliAODVertex *>(fEvent->GetPrimaryVertex()));
+ cosPoint = TMath::ACos(cosPoint);
+
+ // DCA between daughters
+ Double_t dca = v0->DcaV0Daughters();
+
+ // Production vertex
+ Double_t xyz[3];
+ v0->GetXYZ(xyz);
+ Double_t r = TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
+
+ Double_t xy[2];
+ Double_t r2 = -1.;
+ if ( GetConvPosXY(static_cast<AliAODTrack *>(daughter[0]), static_cast<AliAODTrack*>(daughter[1]), xy) ){
+ r2 = TMath::Sqrt(xy[0]*xy[0] + xy[1]*xy[1]);
+ }
+
+ // psi pair
+ Double_t psiPair = PsiPair(v0);
+
+ // V0 chi2/ndf
+ Double_t chi2ndf = kfMother->GetChi2()/kfMother->GetNDF();
+
+ if(kfMother) delete kfMother;
+
+ // apply the cuts
+
+ if(iMass > fGcutInvMass) return kFALSE;
+
+ if(chi2ndf > fGcutChi2NDF) return kFALSE;
+
+ if(cosPoint < fGcutCosPoint[0] || cosPoint > fGcutCosPoint[1]) return kFALSE;
+
+ if(dca < fGcutDCA[0] || dca > fGcutDCA[1]) return kFALSE;
+
+ if(r < fGcutVertexR[0] || r > fGcutVertexR[1]) return kFALSE;
+
+ if(psiPair < fGcutPsiPair[0] || psiPair > fGcutPsiPair[1]) return kFALSE;
+
+ // all cuts passed
+
+ pdgV0 = 22;
+ if(sign){
+ pdgP = -11;
+ pdgN = 11;
+ }
+ else{
+ pdgP = 11;
+ pdgN = -11;
+ }
+
+ return kTRUE;
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::CaseK0(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN) const {
+ //
+ // process the K0 candidate
+ //
+
+ if(!v0) return kFALSE;
+
+ AliVTrack* daughter[2];
+ Int_t pIndex = 0, nIndex = 0;
+ Bool_t sign = CheckSigns(v0);
+ if(sign){
+ pIndex = 0;
+ nIndex = 1;
+ }
+ else{
+ pIndex = 1;
+ nIndex = 0;
+ }
+ daughter[0] = dynamic_cast<AliVTrack *>(v0->GetSecondaryVtx()->GetDaughter(pIndex));
+ daughter[1] = dynamic_cast<AliVTrack *>(v0->GetSecondaryVtx()->GetDaughter(nIndex));
+
+ if(!daughter[0] || !daughter[1]) return kFALSE;
+
+ AliKFParticle *kfMother = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kPiPlus), TMath::Abs(kPiPlus));
+ if(!kfMother) return kFALSE;
+
+// AliAODTrack* d[2];
+// d[0] = dynamic_cast<AliAODTrack*>(fEvent->GetTrack(pIndex));
+// d[1] = dynamic_cast<AliAODTrack*>(fEvent->GetTrack(nIndex));
+
+ Float_t iMass = v0->MassK0Short();
+
+ // cos pointing angle
+ Double_t cosPoint = v0->CosPointingAngle(dynamic_cast<AliAODVertex *>(fEvent->GetPrimaryVertex()));
+ cosPoint = TMath::ACos(cosPoint);
+
+ // DCA between daughters
+ Double_t dca = v0->DcaV0Daughters();
+
+ // Production vertex
+ Double_t xyz[3];
+ v0->GetXYZ(xyz);
+
+ Double_t r = TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
+
+ // V0 chi2/ndf
+ Double_t chi2ndf = kfMother->GetChi2()/kfMother->GetNDF();
+
+ if(kfMother) delete kfMother;
+
+ //
+ // apply the cuts
+ //
+ if(iMass < fK0cutInvMass[0] || iMass > fK0cutInvMass[1]) return kFALSE;
+
+ if(chi2ndf > fK0cutChi2NDF) return kFALSE;
+
+ if(cosPoint < fK0cutCosPoint[0] || cosPoint > fK0cutCosPoint[1]) return kFALSE;
+
+ if(dca < fK0cutDCA[0] || dca > fK0cutDCA[1]) return kFALSE;
+
+ if(r < fK0cutVertexR[0] || r > fK0cutVertexR[1]) return kFALSE;
+
+ // all cuts passed
+ pdgV0 = 310;
+ if(sign){
+ pdgP = 211;
+ pdgN = -211;
+ }
+ else{
+ pdgP = -211;
+ pdgN = 211;
+ }
+
+ return kTRUE;
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::CaseLambda(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN, Int_t id) const {
+ //
+ // process teh Lambda and Anti-Lambda candidate
+ //
+
+ if(!v0) return kFALSE;
+
+ const Double_t cL0mass=TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(); // PDG lambda mass
+
+ AliVTrack* daughter[2];
+ Int_t pIndex = 0, nIndex = 0;
+ Float_t mMass[2] = {-1., -1.};
+ Bool_t sign = CheckSigns(v0);
+ if(sign){
+ pIndex = 0;
+ nIndex = 1;
+ mMass[0] = v0->MassLambda();
+ mMass[1] = v0->MassAntiLambda();
+ }
+ else{
+ pIndex = 1;
+ nIndex = 0;
+ mMass[0] = v0->MassAntiLambda();
+ mMass[1] = v0->MassLambda();
+ }
+ daughter[0] = dynamic_cast<AliVTrack *>(v0->GetSecondaryVtx()->GetDaughter(pIndex));
+ daughter[1] = dynamic_cast<AliVTrack *>(v0->GetSecondaryVtx()->GetDaughter(nIndex));
+
+ if(!daughter[0] || !daughter[1]) return kFALSE;
+
+ AliKFParticle *kfMother[2] = {0x0, 0x0};
+ // Lambda
+ kfMother[0] = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kProton), TMath::Abs(kPiPlus));
+ if(!kfMother[0]) return kFALSE;
+
+ // Anti-Lambda
+ kfMother[1] = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kPiPlus), TMath::Abs(kProton));
+ if(!kfMother[1]) return kFALSE;
+
+ Float_t dMass[2] = {TMath::Abs(mMass[0] - cL0mass), TMath::Abs(mMass[1] - cL0mass)};
+
+ Float_t p[2] = {daughter[0]->P(), daughter[1]->P()};
+
+ // check the 3 lambda - antilambda variables
+ Int_t check[2] = {-1, -1}; // 0 : lambda, 1 : antilambda
+ // 1) momentum of the daughter particles - proton is expected to have higher momentum than pion
+ check[0] = (p[0] > p[1]) ? 0 : 1;
+ // 2) mass of the mother particle
+ check[1] = (dMass[0] < dMass[1]) ? 0 : 1;
+
+ // require positive correlation of (1) and (2)
+ if(check[0] != check[1]){
+ if(kfMother[0]) delete kfMother[0];
+ if(kfMother[1]) delete kfMother[1];
+ return kFALSE;
+ }
+
+ // now that the check[0] == check[1]
+ const Int_t type = check[0];
+
+ // require that the input armenteros preselection agree:
+ if(type != id) return kFALSE;
+
+ Float_t iMass =0.;
+ if(sign){
+ iMass = (type == 0) ? v0->MassLambda() : v0->MassAntiLambda();
+ } else{
+ iMass = (type == 0) ? v0->MassAntiLambda() : v0->MassLambda();
+ }
+
+ // cos pointing angle
+ Double_t cosPoint = v0->CosPointingAngle(dynamic_cast<AliAODVertex *>(fEvent->GetPrimaryVertex()));
+ cosPoint = TMath::ACos(cosPoint);
+
+ // DCA between daughters
+ Double_t dca = v0->DcaV0Daughters();
+
+ // Production vertex
+ Double_t xyz[3];
+ v0->GetXYZ(xyz);
+ Double_t r = TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
+
+ // proton - pion indices
+ Int_t ix[2] = {0, 1};
+ if(1 == type){
+ ix[0] = 1;
+ ix[1] = 0;
+ }
+
+ // V0 chi2/ndf
+ Double_t chi2ndf = kfMother[type]->GetChi2()/kfMother[type]->GetNDF();
+
+ if(kfMother[0]) delete kfMother[0];
+ if(kfMother[1]) delete kfMother[1];
+
+ //
+ // apply the cuts
+ //
+
+ if(iMass < fLcutInvMass[0] || iMass > fLcutInvMass[1]) return kFALSE;
+
+ if(chi2ndf > fLcutChi2NDF) return kFALSE;
+
+ if(cosPoint < fLcutCosPoint[0] || cosPoint > fLcutCosPoint[1]) return kFALSE;
+
+ if(dca < fLcutDCA[0] || dca > fLcutDCA[1]) return kFALSE;
+
+ if(r < fLcutVertexR[0] || r > fLcutVertexR[1]) return kFALSE;
+
+ // all cuts passed
+
+ if(0 == type){
+ pdgV0 = 3122;
+ if(sign){
+ pdgP = 2212;
+ pdgN = -211;
+ }
+ else{
+ pdgP = -211;
+ pdgN = 2212;
+ }
+ }
+ else{
+ pdgV0 = -3122;
+ if(sign){
+ pdgP = 211;
+ pdgN = -2212;
+ }
+ else{
+ pdgP = -2212;
+ pdgN = 211;
+ }
+ }
+
+ return kTRUE;
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::V0CutsCommon(const AliAODv0 * const v0) const
+{
+ //
+ // V0 cuts common to all V0s
+ //
+
+ AliAODTrack* dN, *dP;
+
+ dP = dynamic_cast<AliAODTrack *>(v0->GetSecondaryVtx()->GetDaughter(0));
+ dN = dynamic_cast<AliAODTrack *>(v0->GetSecondaryVtx()->GetDaughter(1));
+
+ if(!dN || !dP) return kFALSE;
+
+ Int_t qP = dP->Charge();
+ Int_t qN = dN->Charge();
+
+ if((qP*qN) != -1) return kFALSE;
+
+ return kTRUE;
+}
+//____________________________________________________________________
+Bool_t AliAODv0KineCuts::CheckSigns(AliAODv0* const v0) const
+{
+ //
+ // check wheter the sign was correctly applied to
+ // V0 daughter tracks
+ //
+
+ Bool_t correct = kFALSE;
+
+ AliAODTrack* d[2] = {
+ dynamic_cast<AliAODTrack*>(v0->GetSecondaryVtx()->GetDaughter(0)),
+ dynamic_cast<AliAODTrack*>(v0->GetSecondaryVtx()->GetDaughter(1))
+ ,};
+
+ Int_t sign[2];
+ sign[0] = d[0]->Charge() > 0. ? 1 : -1;
+ sign[1] = d[1]->Charge() > 0. ? 1 : -1;
+
+ if(-1 == sign[0] && 1 == sign[1]){
+ correct = kFALSE;
+ }
+ else{
+ correct = kTRUE;
+ }
+
+ return correct;
+}
+//________________________________________________________________
+Double_t AliAODv0KineCuts::PsiPair(AliAODv0* const v0) const
+{
+ //
+ // Angle between daughter momentum plane and plane
+ //
+
+ if(!fEvent) return -1.;
+
+ Float_t magField = fEvent->GetMagneticField();
+
+ Int_t pIndex = -1;
+ Int_t nIndex = -1;
+ if(CheckSigns(v0)){
+ pIndex = 0;
+ nIndex = 1;
+ }
+ else{
+ pIndex = 1;
+ nIndex = 0;
+ }
+
+
+ AliESDtrack* daughter[2];
+
+ daughter[0] = new AliESDtrack(dynamic_cast<AliAODTrack *>(v0->GetSecondaryVtx()->GetDaughter(pIndex)));
+ daughter[1] = new AliESDtrack(dynamic_cast<AliAODTrack *>(v0->GetSecondaryVtx()->GetDaughter(nIndex)));
+
+ Double_t xyz[3];
+ v0->GetXYZ(xyz);//Reconstructed coordinates of V0; to be replaced by Markus Rammler's method in case of conversions!
+
+ Double_t mn[3] = {0,0,0};
+ Double_t mp[3] = {0,0,0};
+
+ //reconstructed cartesian momentum components of negative daughter;
+ mn[0] = v0->MomNegX();
+ mn[1] = v0->MomNegY();
+ mn[2] = v0->MomNegZ();
+ //reconstructed cartesian momentum components of positive daughter;
+ mp[0] = v0->MomPosX();
+ mp[1] = v0->MomPosY();
+ mp[2] = v0->MomPosZ();
+
+ Double_t deltat = 1.;
+ deltat = TMath::ATan(mp[2]/(TMath::Sqrt(mp[0]*mp[0] + mp[1]*mp[1])+1.e-13)) - TMath::ATan(mn[2]/(TMath::Sqrt(mn[0]*mn[0] + mn[1]*mn[1])+1.e-13));//difference of angles of the two daughter tracks with z-axis
+
+ Double_t radiussum = TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]) + 50;//radius to which tracks shall be propagated
+
+ Double_t momPosProp[3];
+ Double_t momNegProp[3];
+
+ AliExternalTrackParam pt(*daughter[0]), nt(*daughter[1]);
+
+ Double_t psiPair = 4.;
+
+ if(nt.PropagateTo(radiussum,magField) == 0)//propagate tracks to the outside
+ psiPair = -5.;
+ if(pt.PropagateTo(radiussum,magField) == 0)
+ psiPair = -5.;
+ pt.GetPxPyPz(momPosProp);//Get momentum vectors of tracks after propagation
+ nt.GetPxPyPz(momNegProp);
+
+ Double_t pEle =
+ TMath::Sqrt(momNegProp[0]*momNegProp[0]+momNegProp[1]*momNegProp[1]+momNegProp[2]*momNegProp[2]);//absolute momentum value of negative daughter
+ Double_t pPos =
+ TMath::Sqrt(momPosProp[0]*momPosProp[0]+momPosProp[1]*momPosProp[1]+momPosProp[2]*momPosProp[2]);//absolute momentum value of positive daughter
+
+ Double_t scalarproduct =
+ momPosProp[0]*momNegProp[0]+momPosProp[1]*momNegProp[1]+momPosProp[2]*momNegProp[2];//scalar product of propagated positive and negative daughters' momenta
+
+ Double_t chipair = TMath::ACos(scalarproduct/(pEle*pPos));//Angle between propagated daughter tracks
+
+ psiPair = TMath::Abs(TMath::ASin(deltat/chipair));
+
+ delete daughter[0]; delete daughter[1];
+ return psiPair;
+}
+//___________________________________________________________________
+Bool_t AliAODv0KineCuts::GetConvPosXY(AliAODTrack * const ptrack, AliAODTrack * const ntrack, Double_t convpos[2]) const
+{
+ //
+ // recalculate the gamma conversion XY postition
+ //
+
+ const Double_t b = fEvent->GetMagneticField();
+
+ AliESDtrack posESD(ptrack), negESD(ntrack);
+
+ Double_t helixcenterpos[2];
+ GetHelixCenter(ptrack,b,ptrack->Charge(),helixcenterpos);
+
+ Double_t helixcenterneg[2];
+ GetHelixCenter(ntrack,b,ntrack->Charge(),helixcenterneg);
+
+ Double_t poshelix[6];
+ posESD.GetHelixParameters(poshelix,b);
+ Double_t posradius = TMath::Abs(1./poshelix[4]);
+
+ Double_t neghelix[6];
+ negESD.GetHelixParameters(neghelix,b);
+ Double_t negradius = TMath::Abs(1./neghelix[4]);
+
+ Double_t xpos = helixcenterpos[0];
+ Double_t ypos = helixcenterpos[1];
+ Double_t xneg = helixcenterneg[0];
+ Double_t yneg = helixcenterneg[1];
+
+ convpos[0] = (xpos*negradius + xneg*posradius)/(negradius+posradius);
+ convpos[1] = (ypos*negradius+ yneg*posradius)/(negradius+posradius);
+
+ return 1;
+}
+//___________________________________________________________________
+Bool_t AliAODv0KineCuts::GetHelixCenter(AliAODTrack * const track, Double_t b,Int_t charge, Double_t center[2]) const
+{
+ //
+ // computes the center of the track helix
+ //
+
+ Double_t pi = TMath::Pi();
+
+ Double_t helix[6];
+ AliESDtrack esddaughter(track);
+ esddaughter.GetHelixParameters(helix,b);
+
+ Double_t xpos = helix[5];
+ Double_t ypos = helix[0];
+ Double_t radius = TMath::Abs(1./helix[4]);
+ Double_t phi = helix[2];
+
+ if(phi < 0){
+ phi = phi + 2*pi;
+ }
+
+ phi -= pi/2.;
+ Double_t xpoint = radius * TMath::Cos(phi);
+ Double_t ypoint = radius * TMath::Sin(phi);
+
+ if(b<0){
+ if(charge > 0){
+ xpoint = - xpoint;
+ ypoint = - ypoint;
+ }
+ /* avoid self assignment
+ if(charge < 0){
+ xpoint = xpoint;
+ ypoint = ypoint;
+ }
+ */
+ }
+ if(b>0){
+ /* avoid self assignment
+ if(charge > 0){
+ xpoint = xpoint;
+ ypoint = ypoint;
+ }
+ */
+ if(charge < 0){
+ xpoint = - xpoint;
+ ypoint = - ypoint;
+ }
+ }
+ center[0] = xpos + xpoint;
+ center[1] = ypos + ypoint;
+
+ return 1;
+}
+//___________________________________________________________________
+AliKFParticle *AliAODv0KineCuts::CreateMotherParticle(const AliVTrack* const pdaughter, const AliVTrack* const ndaughter, Int_t pspec, Int_t nspec) const
+{
+ //
+ // Creates a mother particle
+ //
+ AliKFParticle pkfdaughter(*pdaughter, pspec);
+ AliKFParticle nkfdaughter(*ndaughter, nspec);
+
+
+ // Create the mother particle
+ AliKFParticle *m = new AliKFParticle(pkfdaughter, nkfdaughter);
+ m->SetField(fEvent->GetMagneticField());
+ if(TMath::Abs(kElectron) == pspec && TMath::Abs(kElectron) == nspec) m->SetMassConstraint(0, 0.001);
+ else if(TMath::Abs(kPiPlus) == pspec && TMath::Abs(kPiPlus) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kK0Short)->Mass(), 0.);
+ else if(TMath::Abs(kProton) == pspec && TMath::Abs(kPiPlus) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(), 0.);
+ else if(TMath::Abs(kPiPlus) == pspec && TMath::Abs(kProton) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(), 0.);
+ else{
+ AliErrorClass("Wrong daughter ID - mass constraint can not be set");
+ }
+
+ AliKFVertex improvedVertex = *fPrimaryVertex;
+ improvedVertex += *m;
+ m->SetProductionVertex(improvedVertex);
+
+ // update 15/06/2010
+ // mother particle will not be added to primary vertex but only to its copy
+ // as this confilcts with calling
+ // m->SetPrimaryVertex() function and
+ // subsequently removing the mother particle afterwards
+ // Source: Sergey Gorbunov
+
+ return m;
+}
+//____________________________________________________________________
+void AliAODv0KineCuts::SetEvent(AliAODEvent* const event){
+ //
+ // direct setter of AOD event
+ //
+ fEvent = event;
+ if(!fEvent){
+ AliErrorClass("Invalid input event pointer");
+ return;
+ }
+
+ // Set Mother vertex List
+ fNumberKinkMothers = 0;
+ if(fEvent->GetNumberOfVertices() > fKinkMotherList.GetSize()) fKinkMotherList.Set(fEvent->GetNumberOfVertices());
+ for(Int_t ivertex=0; ivertex < fEvent->GetNumberOfVertices(); ivertex++) {
+ AliAODVertex *aodvertex = fEvent->GetVertex(ivertex);
+ if(!aodvertex) continue;
+ if(aodvertex->GetType()==AliAODVertex::kKink) {
+ AliAODTrack *mother = (AliAODTrack *) aodvertex->GetParent();
+ if(!mother) continue;
+ Int_t idmother = mother->GetID();
+ fKinkMotherList[fNumberKinkMothers++] = idmother;
+ }
+ }
+
+ if (fUseExternalVertex) return;
+ else{
+ if(fPrimaryVertex && fDeleteVertex){
+ delete fPrimaryVertex;
+ fPrimaryVertex=0x0;
+ }
+ fPrimaryVertex = new AliKFVertex(*(fEvent->GetPrimaryVertex()));
+ fDeleteVertex=kTRUE;
+ }
+
+
+
+}
+//____________________________________________________________________
+void AliAODv0KineCuts::SetEvent(AliVEvent* const event){
+ //
+ // direct setter of AOD event
+ //
+
+ fEvent = dynamic_cast<AliAODEvent*>(event);
+ if(!fEvent){
+ AliErrorClass("Invalid input event pointer");
+ return;
+ }
+
+ // Set Mother vertex List
+ fNumberKinkMothers = 0;
+ if(fEvent->GetNumberOfVertices() > fKinkMotherList.GetSize()) fKinkMotherList.Set(fEvent->GetNumberOfVertices());
+ for(Int_t ivertex=0; ivertex < fEvent->GetNumberOfVertices(); ivertex++) {
+ AliAODVertex *aodvertex = fEvent->GetVertex(ivertex);
+ if(!aodvertex) continue;
+ if(aodvertex->GetType()==AliAODVertex::kKink) {
+ AliAODTrack *mother = (AliAODTrack *) aodvertex->GetParent();
+ if(!mother) continue;
+ Int_t idmother = mother->GetID();
+ fKinkMotherList[fNumberKinkMothers++] = idmother;
+ }
+ }
+
+ if (fUseExternalVertex) return;
+ else{
+ if(fPrimaryVertex && fDeleteVertex){
+ delete fPrimaryVertex;
+ fPrimaryVertex=0x0;
+ }
+ fPrimaryVertex = new AliKFVertex(*(fEvent->GetPrimaryVertex()));
+ fDeleteVertex=kTRUE;
+ }
+}
+
+
+//________________________________________________________________
+void AliAODv0KineCuts::UseExternalVertex(Bool_t use_external){
+ //
+ // Reenable primary Vertex from AOD event
+ //
+ if (use_external) fUseExternalVertex =kTRUE;
+ else fUseExternalVertex =kFALSE;
+}
+
+
+
+
+//________________________________________________________________
+void AliAODv0KineCuts::SetPrimaryVertex(AliKFVertex* const v){
+ //
+ // set the primary vertex of the event
+ //
+ if(fPrimaryVertex && fDeleteVertex){
+ delete fPrimaryVertex;
+ fPrimaryVertex =0x0;
+ fDeleteVertex = kFALSE;
+ }
+ fUseExternalVertex=kTRUE;
+ fPrimaryVertex = v; // set primary Vertex
+ if(!fPrimaryVertex){
+ AliErrorClass("Failed to initialize the primary vertex");
+ return;
+ }
+}
+//___________________________________________________________________
+void AliAODv0KineCuts::SetMode(Int_t mode, Int_t type){
+ //
+ // this function allows the user to select (prior running the 'ProcessV0' function)
+ // to select different approaches to V0 selection - the 'mode'
+ // - and -
+ // different systems (pp, PbPb) - 'type'
+ //
+ // To see the cut values for different modes please refer to the
+ // function SetCuts()
+ //
+ // Important notice: based on the parameters particular sets of cuts will
+ // be activated for teh V0 selection. If some additional changes to single
+ // cuts are needed please us the SetXXXcut function (see the header file)
+ //
+
+ switch(mode){
+ case kPurity:
+ fMode = kPurity; // used to obtain highest purity possible - the efficiency may be low
+ break;
+ case kEffGamma:
+ fMode = kEffGamma; // used to obtain highes efficiency possible - the purity may be worse
+ break;
+ default:
+ AliError("V0 selection mode not recognozed, setting 'kPurity'");
+ fMode = kPurity;
+ }
+
+ switch(type){
+ case kPP:
+ fType = kPP; // cuts optimized for low multiplicity
+ break;
+ case kPbPb:
+ fType = kPbPb; // cuts optimized for high multiplicity
+ break;
+ }
+
+ // setup the cut values for selected mode & type
+ SetCuts();
+
+}
+//___________________________________________________________________
+void AliAODv0KineCuts::SetMode(Int_t mode, const char* type){
+ //
+ // overloaded function - please see above
+ //
+
+ Int_t t = -1;
+
+ if(!strcmp("pp", type)) t = kPP;
+ else if(!(strcmp("PbPb", type))) t = kPbPb;
+ else{
+ AliError("data type not recognized, setting 'pp'");
+ t = kPP;
+ }
+
+ SetMode(mode, t);
+
+}
+//___________________________________________________________________
+void AliAODv0KineCuts::SetCuts(){
+ //
+ // this funciton sets the default cut values based on the selected
+ // fMode and fType.
+ // please note that only the cuts that have different values than the default
+ // cuts are updated here
+ //
+
+ // last update: 14/02/2011
+ // as a very preliminary - the only change to default cuts is to apply
+ // less restricting gamma conversion selection in PreselectV0() function
+
+
+
+}
+
+//___________________________________________________________________
+Bool_t AliAODv0KineCuts::IsKinkMother(const AliAODTrack * const track) const {
+ //
+ // Check if track is a kink mother
+ //
+ for(int ivtx = 0; ivtx < fNumberKinkMothers; ivtx++){
+ if(track->GetID() == fKinkMotherList[ivtx]) return kTRUE;
+ }
+ return kFALSE;
+}
+
+//___________________________________________________________________
+Bool_t AliAODv0KineCuts::IsKinkDaughter(const AliAODTrack * const track) const {
+ //
+ // Check if track is a kink daughter
+ //
+ AliAODVertex *vtx = track->GetProdVertex();
+ if(!vtx) return kFALSE;
+ if(vtx->GetType()==AliAODVertex::kKink) return kTRUE;
+ return kFALSE;
+}
+
--- /dev/null
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice */
+/*
+ * plesae see source file for more details
+ */
+#ifndef ALIAODV0KINECUTS_H
+#define ALIAODV0KINECUTS_H
+
+#include <TObject.h>
+#include <TArrayI.h>
+
+class AliAODv0;
+class AliAODEvent;
+class AliVEvent;
+class AliAODTrack;
+class AliVTrack;
+class AliKFParticle;
+class AliKFVertex;
+
+class AliAODv0KineCuts : public TObject{
+ public:
+ enum{ // Reconstructed V0
+ kUndef = -1,
+ kGamma = 0,
+ kK0 = 1,
+ kLambda = 2,
+ kALambda = 3
+ };
+ enum{ // data types
+ kPP = 0,
+ kPbPb = 1, // not yet implemented
+ };
+ enum{ // operation modes
+ kPurity = 0, // purely kinematical selection
+ kEffGamma = 1 // !!! involves TPC dEdx or nSimga cuts !!!
+ };
+
+ AliAODv0KineCuts();
+ virtual ~AliAODv0KineCuts();
+
+ AliAODv0KineCuts(const AliAODv0KineCuts &ref);
+ AliAODv0KineCuts &operator=(const AliAODv0KineCuts &ref);
+
+ // main selection function - called once per V0 candidate
+ Bool_t ProcessV0(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN) const;
+ Bool_t ProcessV0(AliAODv0* const v0, Int_t &pdgP, Int_t &pdgN) const;
+
+ // must be called by the user
+ void SetEvent(AliAODEvent* const event);
+ void SetEvent(AliVEvent* const event);
+ void SetPrimaryVertex(AliKFVertex* const v);
+
+ // user can select an operation modes [see .cxx for details]
+ void SetMode(Int_t mode, Int_t type);
+ void SetMode(Int_t mode, const char* type);
+ void UseExternalVertex(Bool_t use_external=kTRUE);
+ AliKFParticle *CreateMotherParticle(const AliVTrack* const pdaughter, const AliVTrack* const ndaughter, Int_t pspec, Int_t nspec) const;
+ void SetCuts(); // setup cuts for selected fMode and fType, see source file for details
+ //
+ // setter functions for V0 cut values
+ // for default values see the constructor
+ // see the default contructor for comments
+ //
+
+ // single track cuts
+ void SetNTPCclusters(Int_t n) { fTPCNcls = n; };
+ void SetTPCrefit(Bool_t r = kTRUE) { fTPCrefit = r; };
+ void SetTPCclusterratio(Float_t r) { fTPCclsRatio = r; };
+ void SetNoKinks(Bool_t k = kTRUE) { fNoKinks = k; };
+
+ // gamma cuts
+ void SetGammaCutChi2NDF(Float_t val) { fGcutChi2NDF = val; };
+ void SetGammaCutCosPoint(Float_t * const val) {
+ fGcutCosPoint[0] = val[0];
+ fGcutCosPoint[1] = val[1];
+ };
+ void SetGammaCutDCA(Float_t * const val){
+ fGcutDCA[0] = val[0];
+ fGcutDCA[1] = val[1];
+ };
+ void SetGammaCutVertexR(Float_t * const val){
+ fGcutVertexR[0] = val[0];
+ fGcutVertexR[1] = val[1];
+ };
+ void SetGammaCutPsiPair(Float_t * const val){
+ fGcutPsiPair[0] = val[0];
+ fGcutPsiPair[1] = val[1];
+ };
+ void SetGammaCutInvMass(Float_t val){
+ fGcutInvMass = val;
+ };
+ // K0 cuts
+ void SetK0CutChi2NDF(Float_t val) { fK0cutChi2NDF = val; };
+ void SetK0CutCosPoint(Float_t * const val) {
+ fK0cutCosPoint[0] = val[0];
+ fK0cutCosPoint[1] = val[1];
+ };
+ void SetK0CutDCA(Float_t * const val){
+ fK0cutDCA[0] = val[0];
+ fK0cutDCA[1] = val[1];
+ };
+ void SetK0CutVertexR(Float_t * const val){
+ fK0cutVertexR[0] = val[0];
+ fK0cutVertexR[1] = val[1];
+ };
+ void SetK0CutInvMass(Float_t * const val){
+ fK0cutInvMass[0] = val[0];
+ fK0cutInvMass[1] = val[1];
+ };
+ // lambda & anti-lambda cuts
+ void SetLambdaCutChi2NDF(Float_t val) { fLcutChi2NDF = val; };
+ void SetLambdaCutCosPoint(Float_t * const val) {
+ fLcutCosPoint[0] = val[0];
+ fLcutCosPoint[1] = val[1];
+ };
+ void SetLambdaCutDCA(Float_t * const val){
+ fLcutDCA[0] = val[0];
+ fLcutDCA[1] = val[1];
+ };
+ void SetLambdaCutVertexR(Float_t * const val){
+ fLcutVertexR[0] = val[0];
+ fLcutVertexR[1] = val[1];
+ };
+ void SetLambdaCutInvMass(Float_t * const val){
+ fLcutInvMass[0] = val[0];
+ fLcutInvMass[1] = val[1];
+ };
+
+
+ Int_t PreselectV0(AliAODv0* const v0) const;
+
+ Bool_t CaseGamma(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN) const;
+ Bool_t CaseK0(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN) const;
+ Bool_t CaseLambda(AliAODv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN, Int_t id) const;
+
+ Bool_t V0CutsCommon(const AliAODv0 * const v0) const;
+ Bool_t SingleTrackCuts(AliAODv0 * const v0) const;
+ Bool_t CheckSigns(AliAODv0* const v0) const;
+
+ Double_t PsiPair(AliAODv0* const v0) const;
+ Bool_t GetConvPosXY(AliAODTrack * const ptrack, AliAODTrack * const ntrack, Double_t convpos[2]) const;
+ Bool_t GetHelixCenter(AliAODTrack * const track, Double_t b, Int_t charge, Double_t center[2]) const;
+
+ protected:
+ void Copy(TObject &ref) const;
+
+ private:
+ Bool_t GammaEffCuts(AliAODv0 * const v0); // set of cuts optimized for high gamma efficiency
+ Bool_t IsKinkMother(const AliAODTrack * const track) const;
+ Bool_t IsKinkDaughter(const AliAODTrack * const track) const;
+
+ private:
+ AliAODEvent *fEvent; // current event
+ AliKFVertex *fPrimaryVertex; // primary vertex
+
+ Int_t fType; // data type: p-p or Pb-Pb
+ Int_t fMode; // current operation mode
+
+ // single track cuts
+ Int_t fTPCNcls; // number of TPC clusters
+ Bool_t fTPCrefit; // TPC refit - yes [kTRUE] or do not care [kFALSE]
+ Float_t fTPCclsRatio; // min. TPC cluster ratio
+ Bool_t fNoKinks; // kinks - no [kTRUE] or do not care [kFalse]
+ TArrayI fKinkMotherList; // Kink mothers
+ Int_t fNumberKinkMothers; // Number of kink mothers
+
+ // gamma cut values
+ Float_t fGcutChi2NDF; // Chi2NF cut value for the AliKFparticle gamma
+ Float_t fGcutCosPoint[2]; // cos of the pointing angle [min, max]
+ Float_t fGcutDCA[2]; // DCA between the daughter tracks [min, max]
+ Float_t fGcutVertexR[2]; // radius of the conversion point [min, max]
+ Float_t fGcutPsiPair[2]; // value of the psi pair cut [min, max]
+ Float_t fGcutInvMass; // upper value on the gamma invariant mass
+ // K0 cut values
+ Float_t fK0cutChi2NDF; // Chi2NF cut value for the AliKFparticle K0
+ Float_t fK0cutCosPoint[2]; // cos of the pointing angle [min, max]
+ Float_t fK0cutDCA[2]; // DCA between the daughter tracks [min, max]
+ Float_t fK0cutVertexR[2]; // radius of the decay point [min, max]
+ Float_t fK0cutInvMass[2]; // invariant mass window
+ // Lambda & anti-Lambda cut values
+ Float_t fLcutChi2NDF; // Chi2NF cut value for the AliKFparticle K0
+ Float_t fLcutCosPoint[2]; // cos of the pointing angle [min, max]
+ Float_t fLcutDCA[2]; // DCA between the daughter tracks [min, max]
+ Float_t fLcutVertexR[2]; // radius of the decay point [min, max]
+ Float_t fLcutInvMass[2]; // invariant mass window
+ Bool_t fUseExternalVertex; // Is kTRUE if Vertex is set via SetPrimaryVertex()
+ Bool_t fDeleteVertex; // Is kTRUE if Vertex has been created in SetEvent() function
+
+ ClassDef(AliAODv0KineCuts, 0);
+
+};
+
+#endif
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff