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Commit | Line | Data |
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667cb951 | 1 | // |
2 | // All cuts for single protons and kaons in Lambda(1520) analysis 2010, | |
3 | // based on track quality and particle identification | |
4 | // with TPC and TOF. | |
5 | // Author: Serguey Kiselev. | |
6 | // | |
7 | // | |
8 | ||
9 | #include <Riostream.h> | |
10 | ||
11 | #include "AliPID.h" | |
12 | #include "AliPIDResponse.h" | |
13 | #include "AliRsnCutDaughterLStar2010.h" | |
14 | ||
15 | ClassImp(AliRsnCutDaughterLStar2010) | |
16 | ||
17 | //__________________________________________________________________________________________________ | |
18 | AliRsnCutDaughterLStar2010::AliRsnCutDaughterLStar2010(const char *name, AliPID::EParticleType pid) : | |
19 | AliRsnCut(name, AliRsnTarget::kDaughter), | |
20 | fPID(pid), | |
21 | fCutQuality(Form("%sQuality", name)) | |
22 | { | |
23 | // | |
24 | // Constructor | |
25 | // Initialize track quality cuts to 2010 defaults | |
26 | // | |
27 | ||
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); | |
39 | } | |
40 | ||
41 | //__________________________________________________________________________________________________ | |
42 | Bool_t AliRsnCutDaughterLStar2010::IsSelected(TObject *obj) | |
43 | { | |
44 | // | |
45 | // Global check | |
46 | // | |
47 | ||
48 | // coherence check | |
49 | if (!TargetOK(obj)) return kFALSE; | |
61f275d1 | 50 | |
667cb951 | 51 | // check track |
52 | AliVTrack *track = fDaughter->Ref2Vtrack(); | |
53 | if (!track) { | |
54 | if (!fDaughter->GetRef()) AliWarning("NULL ref"); | |
55 | return kFALSE; | |
56 | } | |
61f275d1 | 57 | |
667cb951 | 58 | // check flags |
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; | |
61f275d1 | 62 | |
667cb951 | 63 | // quality |
64 | if (!fCutQuality.IsSelected(obj)) return kFALSE; | |
61f275d1 | 65 | |
667cb951 | 66 | // check initialization of PID object |
67 | AliPIDResponse *pid = fEvent->GetPIDResponse(); | |
68 | if (!pid) { | |
69 | AliFatal("NULL PID response"); | |
70 | return kFALSE; | |
71 | } | |
61f275d1 | 72 | |
667cb951 | 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; | |
61f275d1 | 82 | |
667cb951 | 83 | // applies the cut differently depending on the PID and the momentum |
84 | if (isTOF) { | |
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); | |
90 | } else { | |
61f275d1 | 91 | // TPC: |
667cb951 | 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 | |
61f275d1 | 98 | if (pTPC <= 0.35) |
667cb951 | 99 | maxTPC = 5.0; |
100 | else if (pTPC <= 0.5) | |
101 | maxTPC = 3.0; | |
102 | else if (pTPC > 0.5 && pTPC <= 0.7 && fPID == AliPID::kKaon) | |
103 | maxTPC = 2.0; | |
104 | else if (pTPC > 0.5 && pTPC <= 1.2 && fPID == AliPID::kProton) | |
105 | maxTPC = 2.0; | |
106 | else | |
107 | return kFALSE; | |
108 | return (nsTPC <= maxTPC); | |
109 | } | |
110 | } |