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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 | ||
15 | //_________________________________________________________________________________________________ | |
16 | AliRsnCutPrimaryVertex::AliRsnCutPrimaryVertex() : | |
2dab9030 | 17 | AliRsnCut(AliRsnCut::kEvent), |
18 | fAcceptTPC(kFALSE) | |
96ab9736 | 19 | { |
20 | // | |
21 | // Default constructor. | |
22 | // | |
23 | } | |
24 | ||
25 | //_________________________________________________________________________________________________ | |
26 | AliRsnCutPrimaryVertex::AliRsnCutPrimaryVertex | |
ceaa78d3 | 27 | (const char *name, Int_t nContributors, Bool_t acceptTPC) : |
2dab9030 | 28 | AliRsnCut(name, AliRsnCut::kEvent, 0, nContributors - 1), |
29 | fAcceptTPC(acceptTPC) | |
96ab9736 | 30 | { |
31 | // | |
32 | // Main constructor. | |
ceaa78d3 | 33 | // Defines the cut range between 0 and |
34 | // the minimum required number of contributors. | |
35 | // The cut will be passed when if the event has a | |
36 | // primary vertex with number of contributors outside this interval. | |
37 | // --- | |
38 | // If the 'acceptTPC' argument is true, events with TPC | |
39 | // primary vertex will be checked, otherwise they will be | |
40 | // rejected by default. | |
41 | // --- | |
42 | // Since the range check uses the '>=' and '<=', the high edge | |
43 | // must be decreased by 1 to get the right behaviour, since this is integer. | |
96ab9736 | 44 | // |
45 | } | |
46 | ||
47 | //_________________________________________________________________________________________________ | |
2dab9030 | 48 | Bool_t AliRsnCutPrimaryVertex::IsSelected(TObject *obj1, TObject* /*obj2*/) |
96ab9736 | 49 | { |
50 | // | |
51 | // Cut checker | |
52 | // | |
53 | ||
54 | // retrieve ESD event | |
2dab9030 | 55 | AliRsnEvent *rsn = dynamic_cast<AliRsnEvent*>(obj1); |
56 | if (!rsn) return kFALSE; | |
57 | AliESDEvent *esd = dynamic_cast<AliESDEvent*>(rsn->GetRef()); | |
96ab9736 | 58 | if (!esd) { |
59 | AliDebug(AliLog::kDebug+2, "NO ESD"); | |
ceaa78d3 | 60 | return kFALSE; |
96ab9736 | 61 | } |
62 | ||
ceaa78d3 | 63 | // get the three possible primary vertexes of the event: |
64 | // 0 = default one | |
65 | // 1 = SPD | |
66 | // 2 = TPC | |
67 | // then, if the default vertex is TPC, the event is rejected, | |
68 | // otherwise, the event is rejected only if its vertex status is 'false' | |
69 | // get primary vertexes | |
70 | const AliESDVertex *vert[3]; | |
71 | vert[0] = esd->GetPrimaryVertex(); | |
72 | vert[1] = esd->GetPrimaryVertexSPD(); | |
73 | vert[2] = esd->GetPrimaryVertexTPC(); | |
74 | ||
75 | // if TPC vertexes are rejected by default do this now | |
76 | if (!fAcceptTPC && (vert[0] == vert[2])) { | |
77 | AliDebug(AliLog::kDebug+2, "Rejecting TPC vertex"); | |
96ab9736 | 78 | return kFALSE; |
79 | } | |
80 | ||
ceaa78d3 | 81 | // if we are here, vert[0] contains the default primary vertex |
82 | // in case it is with tracks or SPD, its status must be OK | |
83 | // because otherwise the ESD event returns the lower level vertex | |
84 | // then, we can check just the first element in the array | |
85 | if (!vert[0]->GetStatus()) { | |
86 | AliDebug(AliLog::kDebug+2, "Bad vertex status"); | |
87 | return kFALSE; | |
88 | } | |
96ab9736 | 89 | |
ceaa78d3 | 90 | // if we are here, the status of default vertex is OK |
91 | // and then we check the number of contributors: | |
92 | // it must be *outside* the 'allowed' range | |
93 | fCutValueI = vert[0]->GetNContributors(); | |
94 | return /*there is a NOT operator */!/*here*/OkRange(); | |
96ab9736 | 95 | } |
96 |