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96ab9736 | 1 | // |
2 | // Class AliRsnCutPrimaryVertex | |
3 | // | |
ceaa78d3 | 4 | // This cut implementation checks the quality of event primary vertex. |
5 | // It currently works only with ESD events (not AOD). | |
96ab9736 | 6 | // |
7 | // authors: Martin Vala (martin.vala@cern.ch) | |
8 | // Alberto Pulvirenti (alberto.pulvirenti@ct.infn.it) | |
9 | // | |
96ab9736 | 10 | |
96ab9736 | 11 | #include "AliRsnCutPrimaryVertex.h" |
12 | ||
13 | ClassImp(AliRsnCutPrimaryVertex) | |
14 | ||
96ab9736 | 15 | //_________________________________________________________________________________________________ |
16 | AliRsnCutPrimaryVertex::AliRsnCutPrimaryVertex | |
02e8aa99 | 17 | (const char *name, Double_t maxVz, Int_t nContributors, Bool_t acceptTPC) : |
32992791 | 18 | AliRsnCut(name, AliRsnCut::kEvent, 0, nContributors - 1, 0.0, maxVz), |
660c46ac | 19 | fAcceptTPC(acceptTPC), |
20 | fCheckPileUp(kFALSE) | |
96ab9736 | 21 | { |
22 | // | |
23 | // Main constructor. | |
ceaa78d3 | 24 | // Defines the cut range between 0 and |
25 | // the minimum required number of contributors. | |
26 | // The cut will be passed when if the event has a | |
27 | // primary vertex with number of contributors outside this interval. | |
28 | // --- | |
29 | // If the 'acceptTPC' argument is true, events with TPC | |
30 | // primary vertex will be checked, otherwise they will be | |
31 | // rejected by default. | |
32 | // --- | |
33 | // Since the range check uses the '>=' and '<=', the high edge | |
34 | // must be decreased by 1 to get the right behaviour, since this is integer. | |
96ab9736 | 35 | // |
02e8aa99 | 36 | |
37 | fMinD = 0.0; | |
0d73200d | 38 | fMaxD = maxVz + 1E-6; |
96ab9736 | 39 | } |
40 | ||
41 | //_________________________________________________________________________________________________ | |
32992791 | 42 | Bool_t AliRsnCutPrimaryVertex::IsSelected(TObject *object) |
96ab9736 | 43 | { |
44 | // | |
45 | // Cut checker | |
46 | // | |
0d73200d | 47 | |
96ab9736 | 48 | // retrieve ESD event |
32992791 | 49 | AliRsnEvent *rsn = dynamic_cast<AliRsnEvent*>(object); |
2dab9030 | 50 | if (!rsn) return kFALSE; |
a378358c | 51 | AliESDEvent *esd = rsn->GetRefESD(); |
52 | AliAODEvent *aod = rsn->GetRefAOD(); | |
47c1a0e0 | 53 | |
54 | if (esd) | |
02e8aa99 | 55 | { |
660c46ac | 56 | // pile-up check |
57 | if (fCheckPileUp) | |
58 | { | |
59 | if (esd->IsPileupFromSPD()) return kFALSE; | |
60 | } | |
61 | ||
47c1a0e0 | 62 | // get the best primary vertex: |
63 | // first try the one with tracks | |
64 | const AliESDVertex *vTrk = esd->GetPrimaryVertexTracks(); | |
65 | const AliESDVertex *vSPD = esd->GetPrimaryVertexSPD(); | |
66 | const AliESDVertex *vTPC = esd->GetPrimaryVertexTPC(); | |
67 | Int_t ncTrk = -1; | |
68 | Int_t ncSPD = -1; | |
69 | Int_t ncTPC = -1; | |
5faf5a07 | 70 | Double_t vzTrk = 1000000.0; |
71 | Double_t vzSPD = 1000000.0; | |
72 | Double_t vzTPC = 1000000.0; | |
47c1a0e0 | 73 | if (vTrk) vzTrk = TMath::Abs(vTrk->GetZv()); |
74 | if (vSPD) vzSPD = TMath::Abs(vSPD->GetZv()); | |
75 | if (vTPC) vzTPC = TMath::Abs(vTPC->GetZv()); | |
76 | if (vTrk) ncTrk = (Int_t)vTrk->GetNContributors(); | |
77 | if (vSPD) ncSPD = (Int_t)vSPD->GetNContributors(); | |
78 | if (vTPC) ncTPC = (Int_t)vTPC->GetNContributors(); | |
79 | if(vTrk && ncTrk > 0) | |
80 | { | |
81 | fCutValueI = ncTrk; | |
82 | fCutValueD = vzTrk; | |
83 | } | |
84 | else if (vSPD && ncSPD > 0) | |
85 | { | |
86 | fCutValueI = ncSPD; | |
87 | fCutValueD = vzSPD; | |
88 | } | |
5faf5a07 | 89 | else if (vTPC && ncTPC > 0) |
47c1a0e0 | 90 | { |
5faf5a07 | 91 | if (!fAcceptTPC) |
92 | return kFALSE; | |
93 | else | |
94 | { | |
95 | fCutValueI = ncTPC; | |
96 | fCutValueD = vzTPC; | |
97 | } | |
47c1a0e0 | 98 | } |
99 | else | |
5faf5a07 | 100 | return kFALSE; |
ceaa78d3 | 101 | } |
47c1a0e0 | 102 | else if (aod) |
02e8aa99 | 103 | { |
660c46ac | 104 | // pile-up check is not yet available for AODs |
105 | ||
89202f72 | 106 | // lines suggested by Andrea to reject TPC-only events |
a378358c | 107 | if(!fAcceptTPC) |
108 | { | |
109 | if (!aod->GetPrimaryVertexSPD()) return kFALSE; | |
110 | else if(aod->GetPrimaryVertexSPD()->GetNContributors() < 1) return kFALSE; | |
111 | } | |
89202f72 | 112 | |
113 | AliAODVertex *prim = (AliAODVertex*)aod->GetPrimaryVertex(); | |
a378358c | 114 | if (!prim) return kFALSE; |
115 | ||
32992791 | 116 | fCutValueI = prim->GetNContributors(); |
12ca7a91 | 117 | fCutValueD = prim->GetZ(); |
02e8aa99 | 118 | } |
119 | else | |
47c1a0e0 | 120 | return kFALSE; |
121 | ||
0d73200d | 122 | // output |
123 | Bool_t result = ((!OkRangeI()) && OkRangeD()); | |
0d73200d | 124 | return result; |
96ab9736 | 125 | } |
aa24e021 | 126 | |
127 | //_________________________________________________________________________________________________ | |
128 | void AliRsnCutPrimaryVertex::Print(const Option_t *) const | |
129 | { | |
130 | // | |
131 | // Print information on this cut | |
132 | // | |
133 | ||
134 | AliInfo(Form("Cut name : %s", GetName())); | |
135 | AliInfo(Form("Accepting TPC primary vertex : %s", (fAcceptTPC ? "YES" : "NO"))); | |
136 | AliInfo(Form("Contributors range (outside) : %d - %d", fMinI, fMaxI)); | |
137 | AliInfo(Form("Z-vertex range (inside) : %f - %f", fMinD, fMaxD)); | |
138 | } |