--- /dev/null
+/**************************************************************************\r
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *\r
+ * *\r
+ * Author: The ALICE Off-line Project. *\r
+ * Contributors are mentioned in the code where appropriate. *\r
+ * *\r
+ * Permission to use, copy, modify and distribute this software and its *\r
+ * documentation strictly for non-commercial purposes is hereby granted *\r
+ * without fee, provided that the above copyright notice appears in all *\r
+ * copies and that both the copyright notice and this permission notice *\r
+ * appear in the supporting documentation. The authors make no claims *\r
+ * about the suitability of this software for any purpose. It is *\r
+ * provided "as is" without express or implied warranty. *\r
+ **************************************************************************/\r
+\r
+/*\r
+ * author: M.Kalisky@gsi.de\r
+ * 08/Dec/2010\r
+ *\r
+ * Description: This class allows with purely kinematical cuts\r
+ * to select clean samples of electrons, pions and protons from the\r
+ * V0 online finder ESD V0 candidates for PID and dectector resonse\r
+ * studies.\r
+ */\r
+\r
+#include <TVector3.h>\r
+#include <TDatabasePDG.h>\r
+\r
+#include "AliESDv0.h"\r
+#include "AliESDtrack.h"\r
+#include "AliESDEvent.h"\r
+#include "AliVEvent.h"\r
+#include "AliLog.h"\r
+#include "AliKFParticle.h"\r
+#include "AliVTrack.h"\r
+#include "AliKFVertex.h"\r
+\r
+#include "AliESDv0KineCuts.h"\r
+\r
+ClassImp(AliESDv0KineCuts)\r
+\r
+//____________________________________________________________________\r
+AliESDv0KineCuts::AliESDv0KineCuts() :\r
+ fEvent(0x0)\r
+ , fPrimaryVertex(0x0)\r
+ , fType(0)\r
+ , fMode(0)\r
+ , fTPCNcls(1)\r
+ , fTPCrefit(kTRUE)\r
+ , fTPCchi2perCls(4.0)\r
+ , fTPCclsRatio(0.6)\r
+ , fNoKinks(kTRUE)\r
+ , fGcutChi2NDF(10)\r
+ , fGcutInvMass(0.05)\r
+ , fK0cutChi2NDF(10)\r
+ , fLcutChi2NDF(10)\r
+{\r
+ //\r
+ // Default constructor\r
+ //\r
+\r
+ // default single track cuts\r
+ fTPCNcls = 1; // minimal number of the TPC clusters\r
+ fTPCrefit = kTRUE; // TPC refit\r
+ fTPCchi2perCls = 4.0; // chi2 per TPC cluster\r
+ fTPCclsRatio = 0.6; // minimal foun/findable TPC cluster ratio\r
+ fNoKinks = kTRUE; // kinks - no [kTRUE] or do not care [kFalse]\r
+\r
+\r
+ // default gamma cuts values\r
+ fGcutChi2NDF = 10; // Chi2NF cut value for the AliKFparticle gamma\r
+ fGcutCosPoint[0] = 0; // cos of the pointing angle [min, max]\r
+ fGcutCosPoint[1] = 0.02; // cos of the pointing angle [min, max]\r
+ fGcutDCA[0] = 0.; // DCA between the daughter tracks [min, max]\r
+ fGcutDCA[1] = 0.25; // DCA between the daughter tracks [min, max]\r
+ fGcutVertexR[0] = 3.; // radius of the conversion point [min, max]\r
+ fGcutVertexR[1] = 90.; // radius of the conversion point [min, max]\r
+ fGcutPsiPair[0] = 0.; // value of the psi pair cut [min, max]\r
+ fGcutPsiPair[1] = 0.05; // value of the psi pair cut [min, max]\r
+ fGcutInvMass = 0.05; // upper value on the gamma invariant mass\r
+ // default K0 cuts\r
+ fK0cutChi2NDF = 10; // Chi2NF cut value for the AliKFparticle K0\r
+ fK0cutCosPoint[0] = 0.; // cos of the pointing angle [min, max]\r
+ fK0cutCosPoint[1] = 0.02; // cos of the pointing angle [min, max]\r
+ fK0cutDCA[0] = 0.; // DCA between the daughter tracks [min, max]\r
+ fK0cutDCA[1] = 0.2; // DCA between the daughter tracks [min, max]\r
+ fK0cutVertexR[0] = 2.0; // radius of the decay point [min, max]\r
+ fK0cutVertexR[1] = 30.0; // radius of the decay point [min, max]\r
+ fK0cutInvMass[0] = 0.486; // invariant mass window\r
+ fK0cutInvMass[1] = 0.508; // invariant mass window\r
+ // Lambda & anti-Lambda cut values\r
+ fLcutChi2NDF = 10; // Chi2NF cut value for the AliKFparticle K0\r
+ fLcutCosPoint[0] = 0.; // cos of the pointing angle [min, max]\r
+ fLcutCosPoint[1] = 0.02; // cos of the pointing angle [min, max]\r
+ fLcutDCA[0] = 0.; // DCA between the daughter tracks [min, max]\r
+ fLcutDCA[1] = 0.2; // DCA between the daughter tracks [min, max]\r
+ fLcutVertexR[0] = 2.0; // radius of the decay point [min, max]\r
+ fLcutVertexR[1] = 40.0; // radius of the decay point [min, max]\r
+ fLcutInvMass[0] = 1.11; // invariant mass window\r
+ fLcutInvMass[1] = 1.12; // invariant mass window\r
+ \r
+}\r
+//____________________________________________________________________\r
+AliESDv0KineCuts::~AliESDv0KineCuts(){\r
+ //\r
+ // Destructor\r
+ //\r
+\r
+\r
+}\r
+//____________________________________________________________________\r
+AliESDv0KineCuts::AliESDv0KineCuts(const AliESDv0KineCuts &ref):\r
+ TObject(ref)\r
+ , fEvent(0x0)\r
+ , fPrimaryVertex(0x0)\r
+ , fType(0)\r
+ , fMode(0)\r
+ , fTPCNcls(1)\r
+ , fTPCrefit(kTRUE)\r
+ , fTPCchi2perCls(4.0)\r
+ , fTPCclsRatio(0.6)\r
+ , fNoKinks(kTRUE)\r
+ , fGcutChi2NDF(10)\r
+ , fGcutInvMass(0.05)\r
+ , fK0cutChi2NDF(10)\r
+ , fLcutChi2NDF(10)\r
+{\r
+ //\r
+ // Copy operator\r
+ //\r
+\r
+ ref.Copy(*this);\r
+}\r
+//____________________________________________________________________\r
+AliESDv0KineCuts &AliESDv0KineCuts::operator=(const AliESDv0KineCuts &ref){\r
+ //\r
+ // assignment operator\r
+ //\r
+ if(this != &ref)\r
+ ref.Copy(*this);\r
+ return *this; \r
+}\r
+//____________________________________________________________________\r
+void AliESDv0KineCuts::Copy(TObject &ref) const {\r
+ //\r
+ // Performs the copying of the object\r
+ //\r
+\r
+ TObject::Copy(ref);\r
+\r
+ AliESDv0KineCuts &target = dynamic_cast<AliESDv0KineCuts &>(ref);\r
+\r
+ // default single track cuts\r
+ target.fTPCNcls = fTPCNcls;\r
+ target.fTPCrefit = fTPCrefit;\r
+ target.fTPCchi2perCls = fTPCchi2perCls;\r
+ target.fTPCclsRatio = fTPCclsRatio;\r
+ target.fNoKinks = fNoKinks;\r
+\r
+\r
+ // default gamma cuts values\r
+ target.fGcutChi2NDF = fGcutChi2NDF;\r
+ memcpy(target.fGcutCosPoint, fGcutCosPoint, sizeof(Float_t) * 2);\r
+ memcpy(target.fGcutDCA, fGcutDCA, sizeof(Float_t) * 2); \r
+ memcpy(target.fGcutVertexR, fGcutVertexR, sizeof(Float_t) * 2);\r
+ memcpy(target.fGcutPsiPair, fGcutPsiPair, sizeof(Float_t) * 2);\r
+ target.fGcutInvMass = fGcutInvMass;\r
+ // default K0 cuts\r
+ target.fK0cutChi2NDF = fK0cutChi2NDF;\r
+ memcpy(target.fK0cutCosPoint, fK0cutCosPoint, sizeof(Float_t) * 2);\r
+ memcpy(target.fK0cutDCA, fK0cutDCA, sizeof(Float_t) * 2);\r
+ memcpy(target.fK0cutVertexR, fK0cutVertexR, sizeof(Float_t) * 2);\r
+ memcpy(target.fK0cutInvMass, fK0cutInvMass, sizeof(Float_t) * 2);\r
+ // Lambda & anti-Lambda cut values\r
+ target.fLcutChi2NDF = fLcutChi2NDF;\r
+ memcpy(target.fLcutCosPoint, fLcutCosPoint, sizeof(Float_t) * 2);\r
+ memcpy(target.fLcutDCA, fLcutDCA, sizeof(Float_t) * 2);\r
+ memcpy(target.fLcutVertexR, fLcutVertexR, sizeof(Float_t) * 2);\r
+ memcpy(target.fLcutInvMass, fLcutInvMass, sizeof(Float_t) * 2);\r
+ \r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::ProcessV0(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN){\r
+ //\r
+ // main user function\r
+ //\r
+\r
+ if(!v0) return kFALSE;\r
+ if(!fEvent){\r
+ AliErrorClass("No valid Event pointer available, provide it first");\r
+ return kFALSE;\r
+ }\r
+\r
+ if(!V0CutsCommon(v0)) return kFALSE;\r
+\r
+ const Int_t id = PreselectV0(v0);\r
+\r
+ if(!SingleTrackCuts(v0)) return kFALSE;\r
+\r
+ switch(id){\r
+ case kUndef:\r
+ return kFALSE;\r
+ case kGamma:\r
+ return CaseGamma(v0, pdgV0, pdgP, pdgN);\r
+ case kK0:\r
+ return CaseK0(v0, pdgV0, pdgP, pdgN);\r
+ case kLambda:\r
+ return CaseLambda(v0, pdgV0, pdgP, pdgN, 0);\r
+ case kALambda:\r
+ return CaseLambda(v0, pdgV0, pdgP, pdgN, 1);\r
+ default:\r
+ return kFALSE; \r
+ }\r
+\r
+ return kFALSE;\r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::ProcessV0(AliESDv0* const v0, Int_t &pdgP, Int_t &pdgN){\r
+ //\r
+ // main user function, simplified if the V0 identity is not necessary\r
+ //\r
+\r
+ if(!v0) return kFALSE;\r
+ if(!fEvent){\r
+ AliErrorClass("No valid Event pointer available, provide it first");\r
+ return kFALSE;\r
+ }\r
+\r
+ Int_t idV0 = -1;\r
+ return ProcessV0(v0, idV0, pdgP, pdgN);\r
+\r
+}\r
+//____________________________________________________________________\r
+Int_t const AliESDv0KineCuts::PreselectV0(AliESDv0* const v0){\r
+ //\r
+ // Make a preselection (exclusive) of the V0 cadidates based on\r
+ // Armenteros plot\r
+ // the armenteros cut values are currently fixed and user is not able to set them via\r
+ // set funcions. The reason is that these cuts are optimized and furneter changes should \r
+ // not be necessary. To prove otherwise please study in detail before changing the values\r
+ //\r
+ \r
+ Float_t ap[2] = {-1., -1.};\r
+ Armenteros(v0, ap);\r
+ // for clarity\r
+ const Float_t alpha = ap[0];\r
+ const Float_t qt = ap[1];\r
+\r
+ // selection cuts \r
+ // - the reagions for different candidates must not overlap \r
+\r
+ // Gamma cuts\r
+ const Double_t cutAlphaG = 0.35; \r
+ const Double_t cutQTG = 0.05;\r
+ const Double_t cutAlphaG2[2] = {0.6, 0.8};\r
+ const Double_t cutQTG2 = 0.04;\r
+\r
+ // K0 cuts\r
+ const Float_t cutQTK0[2] = {0.1075, 0.215};\r
+ const Float_t cutAPK0[2] = {0.199, 0.8}; // parameters for curved QT cut\r
+ \r
+ // Lambda & A-Lambda cuts\r
+ const Float_t cutQTL = 0.03;\r
+ const Float_t cutAlphaL[2] = {0.35, 0.7};\r
+ const Float_t cutAlphaAL[2] = {-0.7, -0.35};\r
+ const Float_t cutAPL[3] = {0.107, -0.69, 0.5}; // parameters fir curved QT cut\r
+\r
+\r
+ if(kPurity == fMode){\r
+ // Check for Gamma candidates\r
+ if(qt < cutQTG){\r
+ if( (TMath::Abs(alpha) < cutAlphaG) ) return kGamma;\r
+ }\r
+ // additional region - should help high pT gammas\r
+ if(qt < cutQTG2){\r
+ if( (TMath::Abs(alpha) > cutAlphaG2[0]) && (TMath::Abs(alpha) < cutAlphaG2[1]) ) return kGamma;\r
+ }\r
+ }\r
+ if(kEffGamma == fMode){\r
+ if(qt < cutQTG) return kGamma;\r
+ }\r
+\r
+ \r
+ // Check for K0 candidates\r
+ Float_t q = cutAPK0[0] * TMath::Sqrt(TMath::Abs(1 - alpha*alpha/(cutAPK0[1]*cutAPK0[1])));\r
+ if( (qt > cutQTK0[0]) && (qt < cutQTK0[1]) && (qt > q) ){\r
+ return kK0;\r
+ }\r
+\r
+ // Check for Lambda candidates\r
+ q = cutAPL[0] * TMath::Sqrt(TMath::Abs(1 - ( (alpha + cutAPL[1]) * (alpha + cutAPL[1]) ) / (cutAPL[2]*cutAPL[2]) ));\r
+ if( (alpha > cutAlphaL[0]) && (alpha < cutAlphaL[1]) && (qt > cutQTL) && (qt < q) ){\r
+ return kLambda;\r
+ }\r
+\r
+ // Check for A-Lambda candidates\r
+ q = cutAPL[0] * TMath::Sqrt(TMath::Abs(1 - ( (alpha - cutAPL[1]) * (alpha - cutAPL[1]) ) / (cutAPL[2]*cutAPL[2]) ));\r
+ if( (alpha > cutAlphaAL[0]) && (alpha < cutAlphaAL[1]) && (qt > cutQTL) && (qt < q) ){\r
+ return kALambda;\r
+ }\r
+ \r
+ return kUndef;\r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::SingleTrackCuts(AliESDv0 * const v0){\r
+ //\r
+ // apply single track cuts\r
+ // correct sign not relevat here\r
+ //\r
+\r
+ if(!v0) return kFALSE;\r
+ \r
+ Int_t pIndex = 0, nIndex = 0;\r
+ pIndex = v0->GetPindex();\r
+ nIndex = v0->GetNindex();\r
+ AliESDtrack* d[2];\r
+ d[0] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(pIndex));\r
+ d[1] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(nIndex));\r
+ \r
+ for(Int_t i=0; i<2; ++i){\r
+ if(!d[i]) return kFALSE;\r
+ \r
+ // status word\r
+ ULong_t status = d[i]->GetStatus();\r
+\r
+ // No. of TPC clusters leave to the users\r
+ if(d[i]->GetTPCNcls() < 1) return kFALSE;\r
+\r
+ // TPC refit\r
+ if(!(status & AliESDtrack::kTPCrefit)) return kFALSE;\r
+ \r
+ // Chi2 per TPC cluster\r
+ Int_t nTPCclusters = d[i]->GetTPCNcls();\r
+ Float_t chi2perTPCcluster = d[i]->GetTPCchi2()/Float_t(nTPCclusters);\r
+ if(chi2perTPCcluster > 4) return kFALSE;\r
+\r
+ // TPC cluster ratio\r
+ Float_t cRatioTPC = d[i]->GetTPCNclsF() > 0. ? static_cast<Float_t>(d[i]->GetTPCNcls())/static_cast<Float_t> (d[i]->GetTPCNclsF()) : 1.;\r
+ if(cRatioTPC < 0.6) return kFALSE;\r
+ \r
+ // kinks\r
+ if(d[i]->GetKinkIndex(0) != 0) return kFALSE;\r
+ \r
+ }\r
+\r
+ return kTRUE;\r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::CaseGamma(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN){\r
+ //\r
+ // process the gamma conversion candidate\r
+ //\r
+\r
+ if(!v0) return kFALSE;\r
+\r
+ AliVTrack* daughter[2];\r
+ Int_t pIndex = 0, nIndex = 0;\r
+\r
+ Bool_t sign = CheckSigns(v0);\r
+ if(sign){\r
+ pIndex = v0->GetPindex();\r
+ nIndex = v0->GetNindex();\r
+ }\r
+ else{\r
+ pIndex = v0->GetNindex();\r
+ nIndex = v0->GetPindex(); \r
+ }\r
+ daughter[0] = dynamic_cast<AliVTrack *>(fEvent->GetTrack(pIndex));\r
+ daughter[1] = dynamic_cast<AliVTrack *>(fEvent->GetTrack(nIndex));\r
+ if(!daughter[0] || !daughter[1]) return kFALSE;\r
+\r
+ AliKFParticle *kfMother = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kElectron), TMath::Abs(kElectron));\r
+ if(!kfMother) return kFALSE;\r
+\r
+ AliESDtrack* d[2];\r
+ d[0] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(pIndex));\r
+ d[1] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(nIndex));\r
+\r
+ Float_t iMass = v0->GetEffMass(0, 0);\r
+\r
+ // cos pointing angle\r
+ Double_t cosPoint = v0->GetV0CosineOfPointingAngle();\r
+ cosPoint = TMath::ACos(cosPoint);\r
+\r
+ // DCA between daughters\r
+ Double_t dca = v0->GetDcaV0Daughters();\r
+\r
+ // Production vertex\r
+ Double_t x, y, z; \r
+ v0->GetXYZ(x,y,z);\r
+ Double_t r = TMath::Sqrt(x*x + y*y);\r
+\r
+ Double_t xy[2];\r
+ Double_t r2 = -1.;\r
+ if ( GetConvPosXY(d[0], d[1], xy) ){\r
+ r2 = TMath::Sqrt(xy[0]*xy[0] + xy[1]*xy[1]);\r
+ }\r
+\r
+ // psi pair \r
+ Double_t psiPair = PsiPair(v0);\r
+ \r
+ // V0 chi2/ndf\r
+ Double_t chi2ndf = kfMother->GetChi2()/kfMother->GetNDF();\r
+\r
+ if(kfMother) delete kfMother; \r
+ \r
+ // apply the cuts\r
+\r
+ if(iMass > fGcutInvMass) return kFALSE;\r
+\r
+ if(chi2ndf > fGcutChi2NDF) return kFALSE;\r
+\r
+ if(cosPoint < fGcutCosPoint[0] || cosPoint > fGcutCosPoint[1]) return kFALSE;\r
+\r
+ if(dca < fGcutDCA[0] || dca > fGcutDCA[1]) return kFALSE;\r
+\r
+ if(r < fGcutVertexR[0] || r > fGcutVertexR[1]) return kFALSE;\r
+\r
+ if(psiPair < fGcutPsiPair[0] || psiPair > fGcutPsiPair[1]) return kFALSE;\r
+ \r
+ // all cuts passed\r
+\r
+ pdgV0 = 22;\r
+ if(sign){\r
+ pdgP = -11;\r
+ pdgN = 11;\r
+ }\r
+ else{\r
+ pdgP = 11;\r
+ pdgN = -11;\r
+ }\r
+\r
+ return kTRUE;\r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::CaseK0(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN){\r
+ //\r
+ // process the K0 candidate\r
+ //\r
+\r
+ if(!v0) return kFALSE;\r
+ \r
+ AliVTrack* daughter[2];\r
+ Int_t pIndex = 0, nIndex = 0;\r
+ Bool_t sign = CheckSigns(v0);\r
+ if(sign){\r
+ pIndex = v0->GetPindex();\r
+ nIndex = v0->GetNindex();\r
+ }\r
+ else{\r
+ pIndex = v0->GetNindex();\r
+ nIndex = v0->GetPindex(); \r
+ }\r
+ \r
+ daughter[0] = dynamic_cast<AliVTrack *>(fEvent->GetTrack(pIndex));\r
+ daughter[1] = dynamic_cast<AliVTrack *>(fEvent->GetTrack(nIndex));\r
+ if(!daughter[0] || !daughter[1]) return kFALSE;\r
+\r
+ AliKFParticle *kfMother = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kPiPlus), TMath::Abs(kPiPlus));\r
+ if(!kfMother) return kFALSE;\r
+\r
+ AliESDtrack* d[2];\r
+ d[0] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(pIndex));\r
+ d[1] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(nIndex));\r
+\r
+ Float_t iMass = v0->GetEffMass(2, 2);\r
+\r
+ // cos pointing angle\r
+ Double_t cosPoint = v0->GetV0CosineOfPointingAngle();\r
+ cosPoint = TMath::ACos(cosPoint);\r
+\r
+ // DCA between daughters\r
+ Double_t dca = v0->GetDcaV0Daughters();\r
+\r
+ // Production vertex\r
+ Double_t x, y, z; \r
+ v0->GetXYZ(x,y,z);\r
+\r
+ Double_t r = TMath::Sqrt(x*x + y*y); \r
+\r
+ // V0 chi2/ndf\r
+ Double_t chi2ndf = kfMother->GetChi2()/kfMother->GetNDF();\r
+ \r
+ if(kfMother) delete kfMother; \r
+\r
+ //\r
+ // apply the cuts\r
+ //\r
+ if(iMass < fK0cutInvMass[0] || iMass > fK0cutInvMass[1]) return kFALSE;\r
+\r
+ if(chi2ndf > fK0cutChi2NDF) return kFALSE;\r
+\r
+ if(cosPoint < fK0cutCosPoint[0] || cosPoint > fK0cutCosPoint[1]) return kFALSE;\r
+\r
+ if(dca < fK0cutDCA[0] || dca > fK0cutDCA[1]) return kFALSE;\r
+\r
+ if(r < fK0cutVertexR[0] || r > fK0cutVertexR[1]) return kFALSE;\r
+\r
+ // all cuts passed\r
+ pdgV0 = 310;\r
+ if(sign){\r
+ pdgP = 211;\r
+ pdgN = -211;\r
+ }\r
+ else{\r
+ pdgP = -211;\r
+ pdgN = 211;\r
+ }\r
+\r
+ return kTRUE;\r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::CaseLambda(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN, Int_t id){\r
+ //\r
+ // process teh Lambda and Anti-Lambda candidate\r
+ //\r
+ \r
+ if(!v0) return kFALSE;\r
+\r
+ const Double_t cL0mass=TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(); // PDG lambda mass\r
+\r
+ AliVTrack* daughter[2];\r
+ Int_t pIndex = 0, nIndex = 0;\r
+ Float_t mMass[2] = {-1., -1.};\r
+ Bool_t sign = CheckSigns(v0);\r
+ if(sign){\r
+ pIndex = v0->GetPindex();\r
+ nIndex = v0->GetNindex();\r
+ mMass[0] = v0->GetEffMass(4, 2);\r
+ mMass[1] = v0->GetEffMass(2, 4);\r
+ }\r
+ else{\r
+ pIndex = v0->GetNindex();\r
+ nIndex = v0->GetPindex(); \r
+ mMass[0] = v0->GetEffMass(2, 4);\r
+ mMass[1] = v0->GetEffMass(4, 2);\r
+ }\r
+ \r
+ daughter[0] = dynamic_cast<AliVTrack *>(fEvent->GetTrack(pIndex));\r
+ daughter[1] = dynamic_cast<AliVTrack *>(fEvent->GetTrack(nIndex));\r
+ if(!daughter[0] || !daughter[1]) return kFALSE;\r
+\r
+ AliKFParticle *kfMother[2] = {0x0, 0x0};\r
+ // Lambda\r
+ kfMother[0] = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kProton), TMath::Abs(kPiPlus));\r
+ if(!kfMother[0]) return kFALSE;\r
+ \r
+ // Anti-Lambda\r
+ kfMother[1] = CreateMotherParticle(daughter[0], daughter[1], TMath::Abs(kPiPlus), TMath::Abs(kProton));\r
+ if(!kfMother[1]) return kFALSE;\r
+\r
+ Float_t dMass[2] = {TMath::Abs(mMass[0] - cL0mass), TMath::Abs(mMass[1] - cL0mass)};\r
+ \r
+ AliESDtrack* d[2];\r
+ d[0] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(pIndex));\r
+ d[1] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(nIndex));\r
+ if(!d[0] || !d[1]) return kFALSE;\r
+ \r
+ Float_t p[2] = {d[0]->GetP(), d[1]->GetP()}; \r
+\r
+ // check the 3 lambda - antilambda variables\r
+ Int_t check[2] = {-1, -1}; // 0 : lambda, 1 : antilambda\r
+ // 1) momentum of the daughter particles - proton is expected to have higher momentum than pion\r
+ check[0] = (p[0] > p[1]) ? 0 : 1;\r
+ // 2) mass of the mother particle\r
+ check[1] = (dMass[0] < dMass[1]) ? 0 : 1;\r
+ \r
+ // require positive correlation of (1) and (2)\r
+ if(check[0] != check[1]){\r
+ if(kfMother[0]) delete kfMother[0]; \r
+ if(kfMother[1]) delete kfMother[1]; \r
+ return kFALSE;\r
+ }\r
+\r
+ // now that the check[0] == check[1]\r
+ const Int_t type = check[0];\r
+\r
+ // require that the input armenteros preselection agree:\r
+ if(type != id) return kFALSE;\r
+\r
+ Float_t iMass =0.;\r
+ if(sign){\r
+ iMass = (type == 0) ? v0->GetEffMass(4, 2) : v0->GetEffMass(2, 4);\r
+ }\r
+ else{\r
+ iMass = (type == 0) ? v0->GetEffMass(2, 4) : v0->GetEffMass(4, 2);\r
+ }\r
+\r
+ // cos pointing angle\r
+ Double_t cosPoint = v0->GetV0CosineOfPointingAngle();\r
+ cosPoint = TMath::ACos(cosPoint);\r
+\r
+ // DCA between daughters\r
+ Double_t dca = v0->GetDcaV0Daughters();\r
+ \r
+ // Production vertex\r
+ Double_t x, y, z; \r
+ v0->GetXYZ(x,y,z);\r
+ Double_t r = TMath::Sqrt(x*x + y*y);\r
+\r
+ // proton - pion indices\r
+ Int_t ix[2] = {0, 1};\r
+ if(1 == type){\r
+ ix[0] = 1;\r
+ ix[1] = 0;\r
+ }\r
+\r
+ // V0 chi2/ndf\r
+ Double_t chi2ndf = kfMother[type]->GetChi2()/kfMother[type]->GetNDF();\r
+\r
+ if(kfMother[0]) delete kfMother[0]; \r
+ if(kfMother[1]) delete kfMother[1]; \r
+\r
+ //\r
+ // apply the cuts\r
+ //\r
+\r
+ if(iMass < fLcutInvMass[0] || iMass > fLcutInvMass[1]) return kFALSE;\r
+\r
+ if(chi2ndf > fLcutChi2NDF) return kFALSE;\r
+\r
+ if(cosPoint < fLcutCosPoint[0] || cosPoint > fLcutCosPoint[1]) return kFALSE;\r
+\r
+ if(dca < fLcutDCA[0] || dca > fLcutDCA[1]) return kFALSE;\r
+\r
+ if(r < fLcutVertexR[0] || r > fLcutVertexR[1]) return kFALSE;\r
+\r
+ // all cuts passed\r
+\r
+ if(0 == type){\r
+ pdgV0 = 3122;\r
+ if(sign){\r
+ pdgP = 2212;\r
+ pdgN = -211;\r
+ }\r
+ else{\r
+ pdgP = -211;\r
+ pdgN = 2212;\r
+ }\r
+ }\r
+ else{\r
+ pdgV0 = -3122;\r
+ if(sign){\r
+ pdgP = 211;\r
+ pdgN = -2212;\r
+ }\r
+ else{\r
+ pdgP = -2212;\r
+ pdgN = 211;\r
+ }\r
+ }\r
+\r
+ return kTRUE;\r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::V0CutsCommon(AliESDv0 * const v0){\r
+ //\r
+ // V0 cuts common to all V0s\r
+ //\r
+\r
+ AliESDtrack* dN, *dP; \r
+ \r
+ dP = dynamic_cast<AliESDtrack *>(fEvent->GetTrack(v0->GetPindex()));\r
+ dN = dynamic_cast<AliESDtrack *>(fEvent->GetTrack(v0->GetNindex())); \r
+ \r
+ if(!dN || !dP) return kFALSE;\r
+\r
+ Int_t qP = dP->Charge();\r
+ Int_t qN = dN->Charge();\r
+\r
+ if((qP*qN) != -1) return kFALSE;\r
+\r
+ return kTRUE;\r
+}\r
+//____________________________________________________________________\r
+void const AliESDv0KineCuts::Armenteros(AliESDv0* const v0, Float_t val[2]){\r
+ //\r
+ // computes the Armenteros variables for given V0\r
+ // fills the histogram\r
+ // returns the values via "val"\r
+ //\r
+ \r
+ Double_t mn[3] = {0,0,0};\r
+ Double_t mp[3] = {0,0,0}; \r
+ Double_t mm[3] = {0,0,0}; \r
+\r
+ if(CheckSigns(v0)){\r
+ v0->GetNPxPyPz(mn[0],mn[1],mn[2]); //reconstructed cartesian momentum components of negative daughter\r
+ v0->GetPPxPyPz(mp[0],mp[1],mp[2]); //reconstructed cartesian momentum components of positive daughter\r
+ }\r
+ else{\r
+ v0->GetPPxPyPz(mn[0],mn[1],mn[2]); //reconstructed cartesian momentum components of negative daughter\r
+ v0->GetNPxPyPz(mp[0],mp[1],mp[2]); //reconstructed cartesian momentum components of positive daughter\r
+ }\r
+ v0->GetPxPyPz(mm[0],mm[1],mm[2]); //reconstructed cartesian momentum components of mother\r
+\r
+ TVector3 vecN(mn[0],mn[1],mn[2]);\r
+ TVector3 vecP(mp[0],mp[1],mp[2]);\r
+ TVector3 vecM(mm[0],mm[1],mm[2]);\r
+ \r
+ Double_t thetaP = acos((vecP * vecM)/(vecP.Mag() * vecM.Mag()));\r
+ Double_t thetaN = acos((vecN * vecM)/(vecN.Mag() * vecM.Mag()));\r
+ \r
+ Double_t alfa = ((vecP.Mag())*cos(thetaP)-(vecN.Mag())*cos(thetaN))/\r
+ ((vecP.Mag())*cos(thetaP)+(vecN.Mag())*cos(thetaN)) ;\r
+ Double_t qt = vecP.Mag()*sin(thetaP);\r
+\r
+ val[0] = alfa;\r
+ val[1] = qt;\r
+}\r
+//____________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::CheckSigns(AliESDv0* const v0){\r
+ //\r
+ // check wheter the sign was correctly applied to \r
+ // V0 daughter tracks\r
+ //\r
+ \r
+ Bool_t correct = kFALSE;\r
+\r
+ Int_t pIndex = 0, nIndex = 0;\r
+ pIndex = v0->GetPindex();\r
+ nIndex = v0->GetNindex();\r
+ \r
+ AliESDtrack* d[2];\r
+ d[0] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(pIndex));\r
+ d[1] = dynamic_cast<AliESDtrack*>(fEvent->GetTrack(nIndex));\r
+\r
+ Int_t sign[2];\r
+ sign[0] = (int)d[0]->GetSign();\r
+ sign[1] = (int)d[1]->GetSign();\r
+ \r
+ if(-1 == sign[0] && 1 == sign[1]){\r
+ correct = kFALSE;\r
+ }\r
+ else{\r
+ correct = kTRUE;\r
+ }\r
+ \r
+ return correct;\r
+}\r
+//________________________________________________________________\r
+Double_t const AliESDv0KineCuts::PsiPair(AliESDv0* const v0) {\r
+ //\r
+ // Angle between daughter momentum plane and plane \r
+ // \r
+\r
+ if(!fEvent) return -1.;\r
+\r
+ Float_t magField = fEvent->GetMagneticField();\r
+\r
+ Int_t pIndex = -1;\r
+ Int_t nIndex = -1;\r
+ if(CheckSigns(v0)){\r
+ pIndex = v0->GetPindex();\r
+ nIndex = v0->GetNindex();\r
+ }\r
+ else{\r
+ pIndex = v0->GetNindex();\r
+ nIndex = v0->GetPindex(); \r
+ }\r
+ \r
+\r
+ AliESDtrack* daughter[2];\r
+\r
+ daughter[0] = dynamic_cast<AliESDtrack *>(fEvent->GetTrack(pIndex));\r
+ daughter[1] = dynamic_cast<AliESDtrack *>(fEvent->GetTrack(nIndex));\r
+\r
+ Double_t x, y, z;\r
+ v0->GetXYZ(x,y,z);//Reconstructed coordinates of V0; to be replaced by Markus Rammler's method in case of conversions!\r
+ \r
+ Double_t mn[3] = {0,0,0};\r
+ Double_t mp[3] = {0,0,0};\r
+ \r
+\r
+ v0->GetNPxPyPz(mn[0],mn[1],mn[2]);//reconstructed cartesian momentum components of negative daughter;\r
+ v0->GetPPxPyPz(mp[0],mp[1],mp[2]);//reconstructed cartesian momentum components of positive daughter; \r
+\r
+\r
+ Double_t deltat = 1.;\r
+ 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\r
+\r
+ Double_t radiussum = TMath::Sqrt(x*x + y*y) + 50;//radius to which tracks shall be propagated\r
+\r
+ Double_t momPosProp[3];\r
+ Double_t momNegProp[3];\r
+ \r
+ AliExternalTrackParam pt(*daughter[0]), nt(*daughter[1]);\r
+ \r
+ Double_t psiPair = 4.;\r
+\r
+ if(nt.PropagateTo(radiussum,magField) == 0)//propagate tracks to the outside\r
+ psiPair = -5.;\r
+ if(pt.PropagateTo(radiussum,magField) == 0)\r
+ psiPair = -5.;\r
+ pt.GetPxPyPz(momPosProp);//Get momentum vectors of tracks after propagation\r
+ nt.GetPxPyPz(momNegProp);\r
+ \r
+ Double_t pEle =\r
+ TMath::Sqrt(momNegProp[0]*momNegProp[0]+momNegProp[1]*momNegProp[1]+momNegProp[2]*momNegProp[2]);//absolute momentum value of negative daughter\r
+ Double_t pPos =\r
+ TMath::Sqrt(momPosProp[0]*momPosProp[0]+momPosProp[1]*momPosProp[1]+momPosProp[2]*momPosProp[2]);//absolute momentum value of positive daughter\r
+ \r
+ Double_t scalarproduct =\r
+ momPosProp[0]*momNegProp[0]+momPosProp[1]*momNegProp[1]+momPosProp[2]*momNegProp[2];//scalar product of propagated positive and negative daughters' momenta\r
+ \r
+ Double_t chipair = TMath::ACos(scalarproduct/(pEle*pPos));//Angle between propagated daughter tracks\r
+\r
+ psiPair = TMath::Abs(TMath::ASin(deltat/chipair)); \r
+\r
+ return psiPair; \r
+}\r
+//___________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::GetConvPosXY(AliESDtrack * const ptrack, AliESDtrack * const ntrack, Double_t convpos[2]){\r
+ //\r
+ // recalculate the gamma conversion XY postition\r
+ //\r
+\r
+ const Double_t b = fEvent->GetMagneticField();\r
+\r
+ Double_t helixcenterpos[2];\r
+ GetHelixCenter(ptrack,b,ptrack->Charge(),helixcenterpos);\r
+\r
+ Double_t helixcenterneg[2];\r
+ GetHelixCenter(ntrack,b,ntrack->Charge(),helixcenterneg);\r
+\r
+ Double_t poshelix[6];\r
+ ptrack->GetHelixParameters(poshelix,b);\r
+ Double_t posradius = TMath::Abs(1./poshelix[4]);\r
+\r
+ Double_t neghelix[6];\r
+ ntrack->GetHelixParameters(neghelix,b);\r
+ Double_t negradius = TMath::Abs(1./neghelix[4]);\r
+\r
+ Double_t xpos = helixcenterpos[0];\r
+ Double_t ypos = helixcenterpos[1];\r
+ Double_t xneg = helixcenterneg[0];\r
+ Double_t yneg = helixcenterneg[1];\r
+\r
+ convpos[0] = (xpos*negradius + xneg*posradius)/(negradius+posradius);\r
+ convpos[1] = (ypos*negradius+ yneg*posradius)/(negradius+posradius);\r
+\r
+ return 1;\r
+}\r
+//___________________________________________________________________\r
+Bool_t const AliESDv0KineCuts::GetHelixCenter(AliESDtrack * const track, Double_t b,Int_t charge, Double_t center[2]){\r
+ //\r
+ // computes the center of the track helix\r
+ //\r
+ \r
+ Double_t pi = TMath::Pi();\r
+ \r
+ Double_t helix[6];\r
+ track->GetHelixParameters(helix,b);\r
+ \r
+ Double_t xpos = helix[5];\r
+ Double_t ypos = helix[0];\r
+ Double_t radius = TMath::Abs(1./helix[4]);\r
+ Double_t phi = helix[2];\r
+\r
+ if(phi < 0){\r
+ phi = phi + 2*pi;\r
+ }\r
+\r
+ phi -= pi/2.;\r
+ Double_t xpoint = radius * TMath::Cos(phi);\r
+ Double_t ypoint = radius * TMath::Sin(phi);\r
+\r
+ if(b<0){\r
+ if(charge > 0){\r
+ xpoint = - xpoint;\r
+ ypoint = - ypoint;\r
+ }\r
+\r
+ if(charge < 0){\r
+ xpoint = xpoint;\r
+ ypoint = ypoint;\r
+ }\r
+ }\r
+ if(b>0){\r
+ if(charge > 0){\r
+ xpoint = xpoint;\r
+ ypoint = ypoint;\r
+ }\r
+\r
+ if(charge < 0){\r
+ xpoint = - xpoint;\r
+ ypoint = - ypoint;\r
+ }\r
+ }\r
+ center[0] = xpos + xpoint;\r
+ center[1] = ypos + ypoint;\r
+\r
+ return 1;\r
+}\r
+//___________________________________________________________________\r
+AliKFParticle *AliESDv0KineCuts::CreateMotherParticle(const AliVTrack* const pdaughter, const AliVTrack* const ndaughter, Int_t pspec, Int_t nspec){\r
+ //\r
+ // Creates a mother particle\r
+ //\r
+ AliKFParticle pkfdaughter(*pdaughter, pspec);\r
+ AliKFParticle nkfdaughter(*ndaughter, nspec);\r
+ \r
+ \r
+ // Create the mother particle \r
+ AliKFParticle *m = new AliKFParticle(pkfdaughter, nkfdaughter);\r
+ // DEBUG - testing\r
+ if(TMath::Abs(kElectron) == pspec && TMath::Abs(kElectron) == nspec) m->SetMassConstraint(0, 0.001);\r
+ else if(TMath::Abs(kPiPlus) == pspec && TMath::Abs(kPiPlus) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kK0Short)->Mass(), 0.);\r
+ else if(TMath::Abs(kProton) == pspec && TMath::Abs(kPiPlus) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(), 0.);\r
+ else if(TMath::Abs(kPiPlus) == pspec && TMath::Abs(kProton) == nspec) m->SetMassConstraint(TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass(), 0.);\r
+ else{\r
+ AliErrorClass("Wrong daughter ID - mass constraint can not be set");\r
+ }\r
+\r
+ AliKFVertex improvedVertex = *fPrimaryVertex;\r
+ improvedVertex += *m;\r
+ m->SetProductionVertex(improvedVertex);\r
+ \r
+ // update 15/06/2010\r
+ // mother particle will not be added to primary vertex but only to its copy \r
+ // as this confilcts with calling\r
+ // m->SetPrimaryVertex() function and\r
+ // subsequently removing the mother particle afterwards\r
+ // Source: Sergey Gorbunov\r
+\r
+ return m;\r
+}\r
+//____________________________________________________________________\r
+void AliESDv0KineCuts::SetEvent(AliESDEvent* const event){\r
+ //\r
+ // direct setter of ESD event\r
+ //\r
+ fEvent = event;\r
+ if(!fEvent){\r
+ AliErrorClass("Invalid input event pointer");\r
+ return;\r
+ }\r
+\r
+}\r
+//____________________________________________________________________\r
+void AliESDv0KineCuts::SetEvent(AliVEvent* const event){\r
+ //\r
+ // direct setter of ESD event\r
+ //\r
+ if(event)\r
+ fEvent = static_cast<AliESDEvent*>(event);\r
+ if(!fEvent){\r
+ AliErrorClass("Invalid input event pointer");\r
+ return;\r
+ }\r
+\r
+}\r
+//________________________________________________________________\r
+void AliESDv0KineCuts::SetPrimaryVertex(AliKFVertex* const v){\r
+ //\r
+ // set the primary vertex of the event\r
+ //\r
+ fPrimaryVertex = v;\r
+ if(!fPrimaryVertex){\r
+ AliErrorClass("Failed to initialize the primary vertex");\r
+ return;\r
+ }\r
+}\r
+//___________________________________________________________________\r
+void AliESDv0KineCuts::SetMode(Int_t mode, Int_t type){\r
+ //\r
+ // this function allows the user to select (prior running the 'ProcessV0' function)\r
+ // to select different approaches to V0 selection - the 'mode'\r
+ // - and -\r
+ // different systems (pp, PbPb) - 'type' \r
+ //\r
+ // To see the cut values for different modes please refer to the\r
+ // function SetCuts()\r
+ //\r
+ // Important notice: based on the parameters particular sets of cuts will\r
+ // be activated for teh V0 selection. If some additional changes to single\r
+ // cuts are needed please us the SetXXXcut function (see the header file)\r
+ // \r
+\r
+ switch(mode){\r
+ case kPurity:\r
+ fMode = kPurity; // used to obtain highest purity possible - the efficiency may be low\r
+ case kEffGamma:\r
+ fMode = kEffGamma; // used to obtain highes efficiency possible - the purity may be worse\r
+ default:\r
+ AliError("V0 selection mode not recognozed, setting 'kPurity'");\r
+ fMode = kPurity;\r
+ }\r
+\r
+ switch(type){\r
+ case kPP:\r
+ fType = kPP; // cuts optimized for low multiplicity \r
+ case kPbPb:\r
+ fType = kPbPb; // cuts optimized for high multiplicity\r
+ }\r
+ \r
+ // setup the cut values for selected mode & type\r
+ SetCuts();\r
+\r
+}\r
+//___________________________________________________________________\r
+void AliESDv0KineCuts::SetMode(Int_t mode, const char* type){\r
+ //\r
+ // overloaded function - please see above\r
+ // \r
+ \r
+ Int_t t = -1;\r
+\r
+ if(!strcmp("pp", type)) t = kPP;\r
+ else if(!(strcmp("PbPb", type))) t = kPbPb;\r
+ else{\r
+ AliError("data type not recognized, setting 'pp'");\r
+ t = kPP; \r
+ }\r
+\r
+ SetMode(mode, t);\r
+\r
+}\r
+//___________________________________________________________________\r
+void AliESDv0KineCuts::SetCuts(){\r
+ //\r
+ // this funciton sets the default cut values based on the selected\r
+ // fMode and fType.\r
+ // please note that only the cuts that have different values than the default\r
+ // cuts are updated here\r
+ //\r
+ \r
+ // last update: 14/02/2011\r
+ // as a very preliminary - the only change to default cuts is to apply\r
+ // less restricting gamma conversion selection in PreselectV0() function\r
+ \r
+\r
+ \r
+}\r
--- /dev/null
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *\r
+ * See cxx source for full Copyright notice */\r
+/*\r
+ * plesae see source file for more details\r
+ */\r
+#ifndef ALIESDV0KINECUTS_H\r
+#define ALIESDV0KINECUTS_H\r
+\r
+#include <TObject.h>\r
+\r
+class AliESDv0;\r
+class AliESDEvent;\r
+class AliVEvent;\r
+class AliESDtrack;\r
+class AliVTrack;\r
+class AliKFParticle;\r
+class AliKFVertex;\r
+\r
+class AliESDv0KineCuts : public TObject{\r
+ public:\r
+ enum{ // Reconstructed V0\r
+ kUndef = -1,\r
+ kGamma = 0,\r
+ kK0 = 1,\r
+ kLambda = 2,\r
+ kALambda = 3\r
+ };\r
+ enum{ // data types\r
+ kPP = 0,\r
+ kPbPb = 1, // not yet implemented\r
+ };\r
+ enum{ // operation modes\r
+ kPurity = 0, // purely kinematical selection\r
+ kEffGamma = 1 // !!! involves TPC dEdx or nSimga cuts !!!\r
+ };\r
+ \r
+ AliESDv0KineCuts();\r
+ virtual ~AliESDv0KineCuts();\r
+\r
+ AliESDv0KineCuts(const AliESDv0KineCuts &ref);\r
+ AliESDv0KineCuts &operator=(const AliESDv0KineCuts &ref);\r
+\r
+ // main selection function - called once per V0 candidate\r
+ Bool_t const ProcessV0(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN);\r
+ Bool_t const ProcessV0(AliESDv0* const v0, Int_t &pdgP, Int_t &pdgN);\r
+\r
+ // must be called by the user\r
+ void SetEvent(AliESDEvent* const event);\r
+ void SetEvent(AliVEvent* const event);\r
+ void SetPrimaryVertex(AliKFVertex* const v);\r
+\r
+ // user can select an operation modes [see .cxx for details]\r
+ void SetMode(Int_t mode, Int_t type);\r
+ void SetMode(Int_t mode, const char* type);\r
+\r
+ //\r
+ // setter functions for V0 cut values\r
+ // for default values see the constructor\r
+ // see the default contructor for comments\r
+ //\r
+\r
+ // single track cuts\r
+ void SetNTPCclusters(Int_t n) { fTPCNcls = n; };\r
+ void SetTPCrefit(Bool_t r = kTRUE) { fTPCrefit = r; };\r
+ void SetTPCchi2perCls(Float_t chi2) { fTPCchi2perCls = chi2; };\r
+ void SetTPCclusterratio(Float_t r) { fTPCclsRatio = r; };\r
+ void SetNoKinks(Bool_t k = kTRUE) { fNoKinks = k; };\r
+\r
+ // gamma cuts\r
+ void SetGammaCutChi2NDF(Float_t val) { fGcutChi2NDF = val; };\r
+ void SetGammaCutCosPoint(Float_t * const val) { \r
+ fGcutCosPoint[0] = val[0];\r
+ fGcutCosPoint[1] = val[1];\r
+ };\r
+ void SetGammaCutDCA(Float_t * const val){\r
+ fGcutDCA[0] = val[0];\r
+ fGcutDCA[1] = val[1];\r
+ };\r
+ void SetGammaCutVertexR(Float_t * const val){\r
+ fGcutVertexR[0] = val[0];\r
+ fGcutVertexR[1] = val[1];\r
+ };\r
+ void SetGammaCutPsiPair(Float_t * const val){\r
+ fGcutPsiPair[0] = val[0];\r
+ fGcutPsiPair[1] = val[1];\r
+ };\r
+ void SetGammaCutInvMass(Float_t val){\r
+ fGcutInvMass = val;\r
+ };\r
+ // K0 cuts\r
+ void SetK0CutChi2NDF(Float_t val) { fK0cutChi2NDF = val; };\r
+ void SetK0CutCosPoint(Float_t * const val) { \r
+ fK0cutCosPoint[0] = val[0];\r
+ fK0cutCosPoint[1] = val[1];\r
+ };\r
+ void SetK0CutDCA(Float_t * const val){\r
+ fK0cutDCA[0] = val[0];\r
+ fK0cutDCA[1] = val[1];\r
+ };\r
+ void SetK0CutVertexR(Float_t * const val){\r
+ fK0cutVertexR[0] = val[0];\r
+ fK0cutVertexR[1] = val[1];\r
+ };\r
+ void SetK0CutInvMass(Float_t * const val){\r
+ fK0cutInvMass[0] = val[0];\r
+ fK0cutInvMass[1] = val[1];\r
+ };\r
+ // lambda & anti-lambda cuts\r
+ void SetLambdaCutChi2NDF(Float_t val) { fLcutChi2NDF = val; };\r
+ void SetLambdaCutCosPoint(Float_t * const val) { \r
+ fLcutCosPoint[0] = val[0];\r
+ fLcutCosPoint[1] = val[1];\r
+ };\r
+ void SetLambdaCutDCA(Float_t * const val){\r
+ fLcutDCA[0] = val[0];\r
+ fLcutDCA[1] = val[1];\r
+ };\r
+ void SetLambdaCutVertexR(Float_t * const val){\r
+ fLcutVertexR[0] = val[0];\r
+ fLcutVertexR[1] = val[1];\r
+ };\r
+ void SetLambdaCutInvMass(Float_t * const val){\r
+ fLcutInvMass[0] = val[0];\r
+ fLcutInvMass[1] = val[1];\r
+ };\r
+ \r
+\r
+ Int_t const PreselectV0(AliESDv0* const v0);\r
+\r
+ Bool_t const CaseGamma(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN);\r
+ Bool_t const CaseK0(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN);\r
+ Bool_t const CaseLambda(AliESDv0* const v0, Int_t &pdgV0, Int_t &pdgP, Int_t &pdgN, Int_t id);\r
+\r
+ Bool_t const V0CutsCommon(AliESDv0 * const v0);\r
+ Bool_t const SingleTrackCuts(AliESDv0 * const v0);\r
+ void const Armenteros(AliESDv0* const v0, Float_t val[2]);\r
+ Bool_t const CheckSigns(AliESDv0* const v0);\r
+\r
+ Double_t const PsiPair(AliESDv0* const v0);\r
+ Bool_t const GetConvPosXY(AliESDtrack * const ptrack, AliESDtrack * const ntrack, Double_t convpos[2]);\r
+ Bool_t const GetHelixCenter(AliESDtrack * const track, Double_t b, Int_t charge, Double_t center[2]);\r
+\r
+ protected:\r
+ void Copy(TObject &ref) const;\r
+\r
+ private:\r
+\r
+ AliKFParticle *CreateMotherParticle(const AliVTrack* const pdaughter, const AliVTrack* const ndaughter, Int_t pspec, Int_t nspec);\r
+ void SetCuts(); // setup cuts for selected fMode and fType, see source file for details\r
+ Bool_t GammaEffCuts(AliESDv0 * const v0); // set of cuts optimized for high gamma efficiency\r
+\r
+ private:\r
+ AliESDEvent *fEvent; // current event\r
+ AliKFVertex *fPrimaryVertex; // primary vertex\r
+\r
+ Int_t fType; // data type: p-p or Pb-Pb\r
+ Int_t fMode; // current operation mode\r
+\r
+ // single track cuts\r
+ Int_t fTPCNcls; // number of TPC clusters\r
+ Bool_t fTPCrefit; // TPC refit - yes [kTRUE] or do not care [kFALSE]\r
+ Float_t fTPCchi2perCls; // max. chi2 per TPC cluster\r
+ Float_t fTPCclsRatio; // min. TPC cluster ratio\r
+ Bool_t fNoKinks; // kinks - no [kTRUE] or do not care [kFalse]\r
+\r
+ // gamma cut values\r
+ Float_t fGcutChi2NDF; // Chi2NF cut value for the AliKFparticle gamma\r
+ Float_t fGcutCosPoint[2]; // cos of the pointing angle [min, max]\r
+ Float_t fGcutDCA[2]; // DCA between the daughter tracks [min, max]\r
+ Float_t fGcutVertexR[2]; // radius of the conversion point [min, max]\r
+ Float_t fGcutPsiPair[2]; // value of the psi pair cut [min, max]\r
+ Float_t fGcutInvMass; // upper value on the gamma invariant mass\r
+ // K0 cut values\r
+ Float_t fK0cutChi2NDF; // Chi2NF cut value for the AliKFparticle K0\r
+ Float_t fK0cutCosPoint[2]; // cos of the pointing angle [min, max]\r
+ Float_t fK0cutDCA[2]; // DCA between the daughter tracks [min, max]\r
+ Float_t fK0cutVertexR[2]; // radius of the decay point [min, max]\r
+ Float_t fK0cutInvMass[2]; // invariant mass window\r
+ // Lambda & anti-Lambda cut values\r
+ Float_t fLcutChi2NDF; // Chi2NF cut value for the AliKFparticle K0\r
+ Float_t fLcutCosPoint[2]; // cos of the pointing angle [min, max]\r
+ Float_t fLcutDCA[2]; // DCA between the daughter tracks [min, max]\r
+ Float_t fLcutVertexR[2]; // radius of the decay point [min, max]\r
+ Float_t fLcutInvMass[2]; // invariant mass window\r
+ \r
+ \r
+ ClassDef(AliESDv0KineCuts, 0);\r
+\r
+};\r
+\r
+#endif\r
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff