2 // All cuts for single pions in Sigma* analysis 2010,
3 // based on track quality and particle identification
5 // Author: Massimo Venaruzzo.
12 #include "AliPIDResponse.h"
13 #include "AliRsnCutDaughterSigmaStar2010PP.h"
15 ClassImp(AliRsnCutDaughterSigmaStar2010PP)
17 //__________________________________________________________________________________________________
18 AliRsnCutDaughterSigmaStar2010PP::AliRsnCutDaughterSigmaStar2010PP(const char *name, AliPID::EParticleType pid) :
19 AliRsnCut(name, AliRsnTarget::kDaughter),
21 fCutQuality(Form("%sQuality", name)),
26 // Initialize track quality cuts to 2010 defaults
29 fCutQuality.SetPtRange(0.15, 1E+20);
30 fCutQuality.SetEtaRange(-0.8, 0.8);
31 fCutQuality.SetDCARmax(0.05);
32 //fCutQuality.SetDCARPtFormula("0.0182+0.0350/pt^1.01");
33 fCutQuality.SetDCAZmax(2.0);
34 fCutQuality.SetSPDminNClusters(1);
35 fCutQuality.SetITSminNClusters(0);
36 fCutQuality.SetITSmaxChi2(1E+20);
37 fCutQuality.SetTPCminNClusters(70);
38 fCutQuality.SetTPCmaxChi2(4.0);
39 fCutQuality.SetRejectKinkDaughters();
40 fCutQuality.SetAODTestFilterBit(5);
43 //__________________________________________________________________________________________________
44 Bool_t AliRsnCutDaughterSigmaStar2010PP::IsSelected(TObject *obj)
51 if (!TargetOK(obj)) return kFALSE;
54 AliVTrack *track = fDaughter->Ref2Vtrack();
56 if (!fDaughter->GetRef()) AliWarning("NULL ref");
61 if ((track->GetStatus() & AliESDtrack::kTPCin ) == 0) return kFALSE;
62 if ((track->GetStatus() & AliESDtrack::kTPCrefit) == 0) return kFALSE;
63 if ((track->GetStatus() & AliESDtrack::kITSrefit) == 0) return kFALSE;
66 if (!fCutQuality.IsSelected(obj)) return kFALSE;
68 // check initialization of PID object
69 AliPIDResponse *pid = fEvent->GetPIDResponse();
71 AliFatal("NULL PID response");
75 // check if TOF is matched
76 // and computes all values used in the PID cut
77 //Bool_t isTOF = MatchTOF(track);
78 //Double_t pTPC = track->GetTPCmomentum();
79 //Double_t p = track->P();
80 Double_t nsTPC = TMath::Abs(pid->NumberOfSigmasTPC(track, fPID));
81 //Double_t nsTOF = TMath::Abs(pid->NumberOfSigmasTOF(track, fPID));
82 Double_t maxTPC = 1E20;
83 //Double_t maxTOF = 1E20;
85 // applies the cut differently depending on the PID and the momentum
87 // TPC: 5sigma cut for all
88 //if (nsTPC > 5.0) return kFALSE;
89 // TOF: 3sigma below 1.5 GeV, 2sigma above
90 //if (p < 1.5) maxTOF = 3.0; else maxTOF = 2.0;
91 //return (nsTOF <= maxTOF);
94 //For the moment TOF is not used - PID ONLY WITH TPC - 3 sigmas in the whole range
97 // below 350 MeV: 5sigma
98 // between 350 and 500 MeV: 3sigma
99 // pions above 500 MeV: 2sigma
100 // kaons between 500 and 700 MeV: 2sigma
101 // kaons above 700 MeV: rejected
104 else if (pTPC <= 0.5)
106 else if (pTPC > 0.5 && fPID == AliPID::kPion)
108 else if (pTPC > 0.5 && pTPC <= 0.7 && fPID == AliPID::kKaon)
114 return (nsTPC <= maxTPC);
116 AliDebugClass(2, "Good Pion (hallelujah)");