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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) : |
f34f960b | 18 | AliRsnCut(name, AliRsnCut::kEvent, 0, nContributors - 1, -maxVz, maxVz + 1E-6), |
2a1c7696 | 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 | // |
36 | } | |
37 | ||
38 | //_________________________________________________________________________________________________ | |
32992791 | 39 | Bool_t AliRsnCutPrimaryVertex::IsSelected(TObject *object) |
96ab9736 | 40 | { |
41 | // | |
42 | // Cut checker | |
43 | // | |
2a1c7696 | 44 | |
99261e24 | 45 | // coherence check |
46 | // which also fills data member objects | |
47 | if (!TargetOK(object)) return kFALSE; | |
48 | ||
2a1c7696 | 49 | // retrieve ESD event |
f34f960b | 50 | AliESDEvent *esd = dynamic_cast<AliESDEvent*>(fEvent->GetRef()); |
51 | AliAODEvent *aod = dynamic_cast<AliAODEvent*>(fEvent->GetRef()); | |
2a1c7696 | 52 | |
53 | if (esd) { | |
54 | // pile-up check | |
55 | if (fCheckPileUp) { | |
56 | if (esd->IsPileupFromSPD()) return kFALSE; | |
5faf5a07 | 57 | } |
2a1c7696 | 58 | |
59 | // get the best primary vertex: | |
60 | // first try the one with tracks | |
61 | const AliESDVertex *vTrk = esd->GetPrimaryVertexTracks(); | |
62 | const AliESDVertex *vSPD = esd->GetPrimaryVertexSPD(); | |
63 | const AliESDVertex *vTPC = esd->GetPrimaryVertexTPC(); | |
64 | Int_t ncTrk = -1; | |
65 | Int_t ncSPD = -1; | |
66 | Int_t ncTPC = -1; | |
67 | Double_t vzTrk = 1000000.0; | |
68 | Double_t vzSPD = 1000000.0; | |
69 | Double_t vzTPC = 1000000.0; | |
70 | if (vTrk) vzTrk = TMath::Abs(vTrk->GetZv()); | |
71 | if (vSPD) vzSPD = TMath::Abs(vSPD->GetZv()); | |
72 | if (vTPC) vzTPC = TMath::Abs(vTPC->GetZv()); | |
73 | if (vTrk) ncTrk = (Int_t)vTrk->GetNContributors(); | |
74 | if (vSPD) ncSPD = (Int_t)vSPD->GetNContributors(); | |
75 | if (vTPC) ncTPC = (Int_t)vTPC->GetNContributors(); | |
76 | if (vTrk && ncTrk > 0) { | |
77 | fCutValueI = ncTrk; | |
78 | fCutValueD = vzTrk; | |
79 | } else if (vSPD && ncSPD > 0) { | |
80 | fCutValueI = ncSPD; | |
81 | fCutValueD = vzSPD; | |
82 | } else if (vTPC && ncTPC > 0) { | |
83 | if (!fAcceptTPC) | |
84 | return kFALSE; | |
85 | else { | |
86 | fCutValueI = ncTPC; | |
87 | fCutValueD = vzTPC; | |
88 | } | |
89 | } else | |
90 | return kFALSE; | |
91 | } else if (aod) { | |
f34f960b | 92 | // in this case, as suggested by Andrea Dainese, |
93 | // we first check if the SPD primary vertex is there | |
94 | // if it is not, then the only available is the TPC | |
95 | // stand-alone primary vertex, which is rejected | |
96 | AliAODVertex *aodv = aod->GetPrimaryVertexSPD(); | |
97 | if (!aodv) { | |
98 | AliDebugClass(1, "Not found SPD vertex --> TPC only available, skipped"); | |
99 | return kFALSE; | |
100 | } | |
101 | // now check primary vertex | |
102 | aodv = (AliAODVertex*)aod->GetPrimaryVertex(); | |
103 | if (CheckVertex(aodv)) { | |
104 | AliDebugClass(1, "Vertex TRK is OK"); | |
105 | fCutValueD = aodv->GetZ(); | |
110620ce | 106 | fCutValueI = aodv->GetNDaughters(); //aodv->GetNContributors(); |
f34f960b | 107 | } |
108 | else { | |
109 | aodv = aod->GetPrimaryVertexSPD(); | |
110 | if (CheckVertex(aodv)) { | |
111 | AliDebugClass(1, "Vertex TRK is BAD, but vertex SPD is OK"); | |
112 | fCutValueD = aodv->GetZ(); | |
110620ce | 113 | fCutValueI = aodv->GetNDaughters(); //aodv->GetNContributors(); |
f34f960b | 114 | } else { |
115 | AliDebugClass(1, "Vertex TRK is BAD, and vertex SPD is BAD"); | |
116 | return kFALSE; | |
117 | } | |
2a1c7696 | 118 | } |
2a1c7696 | 119 | } else |
5faf5a07 | 120 | return kFALSE; |
a378358c | 121 | |
2a1c7696 | 122 | // output |
123 | Bool_t result = ((!OkRangeI()) && OkRangeD()); | |
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 | ||
2a1c7696 | 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)); | |
aa24e021 | 138 | } |