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bd74a0e6 | 1 | // |
2 | // All cuts for single pions in Sigma* analysis 2010, | |
3 | // based on track quality and particle identification | |
4 | // with TPC and TOF. | |
5 | // Author: Massimo Venaruzzo. | |
6 | // | |
7 | // | |
8 | ||
9 | #include <Riostream.h> | |
10 | ||
11 | #include "AliPID.h" | |
12 | #include "AliPIDResponse.h" | |
13 | #include "AliRsnCutDaughterSigmaStar2010PP.h" | |
14 | ||
15 | ClassImp(AliRsnCutDaughterSigmaStar2010PP) | |
16 | ||
17 | //__________________________________________________________________________________________________ | |
18 | AliRsnCutDaughterSigmaStar2010PP::AliRsnCutDaughterSigmaStar2010PP(const char *name, AliPID::EParticleType pid) : | |
19 | AliRsnCut(name, AliRsnTarget::kDaughter), | |
20 | fPID(pid), | |
3da8cef7 | 21 | fCutQuality(Form("%sQuality", name)), |
9d4bb6d8 | 22 | fPIDCut(3.0), |
23 | fMinTPCcluster(70) | |
bd74a0e6 | 24 | { |
25 | // | |
26 | // Constructor | |
27 | // Initialize track quality cuts to 2010 defaults | |
28 | // | |
29 | ||
30 | fCutQuality.SetPtRange(0.15, 1E+20); | |
31 | fCutQuality.SetEtaRange(-0.8, 0.8); | |
32 | fCutQuality.SetDCARmax(0.05); | |
33 | //fCutQuality.SetDCARPtFormula("0.0182+0.0350/pt^1.01"); | |
34 | fCutQuality.SetDCAZmax(2.0); | |
35 | fCutQuality.SetSPDminNClusters(1); | |
36 | fCutQuality.SetITSminNClusters(0); | |
37 | fCutQuality.SetITSmaxChi2(1E+20); | |
9d4bb6d8 | 38 | fCutQuality.SetTPCminNClusters(fMinTPCcluster); |
bd74a0e6 | 39 | fCutQuality.SetTPCmaxChi2(4.0); |
40 | fCutQuality.SetRejectKinkDaughters(); | |
41 | fCutQuality.SetAODTestFilterBit(5); | |
42 | } | |
43 | ||
44 | //__________________________________________________________________________________________________ | |
45 | Bool_t AliRsnCutDaughterSigmaStar2010PP::IsSelected(TObject *obj) | |
46 | { | |
47 | // | |
48 | // Global check | |
49 | // | |
50 | ||
51 | // coherence check | |
52 | if (!TargetOK(obj)) return kFALSE; | |
61f275d1 | 53 | |
bd74a0e6 | 54 | // check track |
55 | AliVTrack *track = fDaughter->Ref2Vtrack(); | |
56 | if (!track) { | |
57 | if (!fDaughter->GetRef()) AliWarning("NULL ref"); | |
58 | return kFALSE; | |
59 | } | |
61f275d1 | 60 | |
76d89202 | 61 | AliDebugClass(2, "Checking status"); |
62 | ||
63 | ||
bd74a0e6 | 64 | // check flags |
65 | if ((track->GetStatus() & AliESDtrack::kTPCin ) == 0) return kFALSE; | |
66 | if ((track->GetStatus() & AliESDtrack::kTPCrefit) == 0) return kFALSE; | |
67 | if ((track->GetStatus() & AliESDtrack::kITSrefit) == 0) return kFALSE; | |
61f275d1 | 68 | |
76d89202 | 69 | AliDebugClass(2, "Checking quality cuts"); |
70 | ||
bd74a0e6 | 71 | // quality |
72 | if (!fCutQuality.IsSelected(obj)) return kFALSE; | |
61f275d1 | 73 | |
76d89202 | 74 | AliDebugClass(2, "...passed"); |
75 | ||
76 | ||
bd74a0e6 | 77 | // check initialization of PID object |
78 | AliPIDResponse *pid = fEvent->GetPIDResponse(); | |
79 | if (!pid) { | |
80 | AliFatal("NULL PID response"); | |
81 | return kFALSE; | |
82 | } | |
61f275d1 | 83 | |
bd74a0e6 | 84 | // check if TOF is matched |
85 | // and computes all values used in the PID cut | |
86 | //Bool_t isTOF = MatchTOF(track); | |
87 | //Double_t pTPC = track->GetTPCmomentum(); | |
88 | //Double_t p = track->P(); | |
3da8cef7 | 89 | Double_t nsTPC = TMath::Abs(pid->NumberOfSigmasTPC(track, fPID)); |
bd74a0e6 | 90 | //Double_t nsTOF = TMath::Abs(pid->NumberOfSigmasTOF(track, fPID)); |
3da8cef7 | 91 | Double_t maxTPC = 1E20; |
bd74a0e6 | 92 | //Double_t maxTOF = 1E20; |
61f275d1 | 93 | |
bd74a0e6 | 94 | // applies the cut differently depending on the PID and the momentum |
95 | //if (isTOF) { | |
61f275d1 | 96 | // TPC: 5sigma cut for all |
97 | //if (nsTPC > 5.0) return kFALSE; | |
98 | // TOF: 3sigma below 1.5 GeV, 2sigma above | |
99 | //if (p < 1.5) maxTOF = 3.0; else maxTOF = 2.0; | |
100 | //return (nsTOF <= maxTOF); | |
bd74a0e6 | 101 | //} else { |
61f275d1 | 102 | |
bd74a0e6 | 103 | //For the moment TOF is not used - PID ONLY WITH TPC - 3 sigmas in the whole range |
61f275d1 | 104 | |
105 | // TPC: | |
106 | // below 350 MeV: 5sigma | |
107 | // between 350 and 500 MeV: 3sigma | |
108 | // pions above 500 MeV: 2sigma | |
109 | // kaons between 500 and 700 MeV: 2sigma | |
110 | // kaons above 700 MeV: rejected | |
111 | /*if (pTPC <= 0.35) | |
112 | maxTPC = 5.0; | |
113 | else if (pTPC <= 0.5) | |
114 | maxTPC = 3.0; | |
115 | else if (pTPC > 0.5 && fPID == AliPID::kPion) | |
116 | maxTPC = 2.0; | |
117 | else if (pTPC > 0.5 && pTPC <= 0.7 && fPID == AliPID::kKaon) | |
118 | maxTPC = 2.0; | |
119 | else | |
120 | return kFALSE;*/ | |
3da8cef7 | 121 | //maxTPC = 3.0; |
122 | maxTPC = fPIDCut; | |
123 | return (nsTPC <= maxTPC); | |
61f275d1 | 124 | |
bd74a0e6 | 125 | AliDebugClass(2, "Good Pion (hallelujah)"); |
126 | return kTRUE; | |
61f275d1 | 127 | } |