2 // All cuts for single protons and kaons in Lambda(1520) analysis 2010,
3 // based on track quality and particle identification
5 // Author: Serguey Kiselev.
12 #include "AliPIDResponse.h"
13 #include "AliRsnCutDaughterLStar2010.h"
15 ClassImp(AliRsnCutDaughterLStar2010)
17 //__________________________________________________________________________________________________
18 AliRsnCutDaughterLStar2010::AliRsnCutDaughterLStar2010(const char *name, AliPID::EParticleType pid) :
19 AliRsnCut(name, AliRsnTarget::kDaughter),
21 fCutQuality(Form("%sQuality", name))
25 // Initialize track quality cuts to 2010 defaults
28 fCutQuality.SetPtRange(0.15, 1E+20);
29 fCutQuality.SetEtaRange(-0.8, 0.8);
30 fCutQuality.SetDCARPtFormula("0.0182+0.0350/pt^1.01");
31 fCutQuality.SetDCAZmax(2.0);
32 fCutQuality.SetSPDminNClusters(1);
33 fCutQuality.SetITSminNClusters(0);
34 fCutQuality.SetITSmaxChi2(1E+20);
35 fCutQuality.SetTPCminNClusters(70);
36 fCutQuality.SetTPCmaxChi2(4.0);
37 fCutQuality.SetRejectKinkDaughters();
38 fCutQuality.SetAODTestFilterBit(5);
41 //__________________________________________________________________________________________________
42 Bool_t AliRsnCutDaughterLStar2010::IsSelected(TObject *obj)
49 if (!TargetOK(obj)) return kFALSE;
52 AliVTrack *track = fDaughter->Ref2Vtrack();
54 if (!fDaughter->GetRef()) AliWarning("NULL ref");
59 if ((track->GetStatus() & AliESDtrack::kTPCin ) == 0) return kFALSE;
60 if ((track->GetStatus() & AliESDtrack::kTPCrefit) == 0) return kFALSE;
61 if ((track->GetStatus() & AliESDtrack::kITSrefit) == 0) return kFALSE;
64 if (!fCutQuality.IsSelected(obj)) return kFALSE;
66 // check initialization of PID object
67 AliPIDResponse *pid = fEvent->GetPIDResponse();
69 AliFatal("NULL PID response");
73 // check if TOF is matched
74 // and computes all values used in the PID cut
75 Bool_t isTOF = MatchTOF(track);
76 Double_t pTPC = track->GetTPCmomentum();
77 Double_t p = track->P();
78 Double_t nsTPC = TMath::Abs(pid->NumberOfSigmasTPC(track, fPID));
79 Double_t nsTOF = TMath::Abs(pid->NumberOfSigmasTOF(track, fPID));
80 Double_t maxTPC = 1E20;
81 Double_t maxTOF = 1E20;
83 // applies the cut differently depending on the PID and the momentum
85 // TPC: 5sigma cut for all
86 if (nsTPC > 5.0) return kFALSE;
87 // TOF: 3sigma below 1.5 GeV, 2sigma above
88 if (p < 1.5) maxTOF = 3.0; else maxTOF = 2.0;
89 return (nsTOF <= maxTOF);
92 // below 350 MeV: 5sigma
93 // between 350 and 500 MeV: 3sigma
94 // pions above 500 MeV: 2sigma
95 // kaons between 500 and 700 MeV: 2sigma
96 // kaons above 700 MeV: rejected
97 // protons above 1200 MeV: rejected
100 else if (pTPC <= 0.5)
102 else if (pTPC > 0.5 && pTPC <= 0.7 && fPID == AliPID::kKaon)
104 else if (pTPC > 0.5 && pTPC <= 1.2 && fPID == AliPID::kProton)
108 return (nsTPC <= maxTPC);