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fd1d0cb9 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | ///////////////////////////////////////////////////////////// | |
17 | // | |
18 | // class used to extract and store reco info of dimu candidate | |
19 | // | |
20 | // Author: X-M. Zhang, zhang@clermont.in2p3.fr | |
21 | // zhangxm@iopp.ccnu.edu.cn | |
22 | ///////////////////////////////////////////////////////////// | |
23 | ||
24 | #include <TDatabasePDG.h> | |
25 | #include <TLorentzVector.h> | |
26 | ||
27 | #include "AliMuonInfoStoreRD.h" | |
28 | #include "AliDimuInfoStoreRD.h" | |
29 | ||
30 | ClassImp(AliDimuInfoStoreRD) | |
31 | ||
32 | const TString AliDimuInfoStoreRD::fgkStdBranchName("DimuRD"); | |
1195bb6f | 33 | Double_t AliDimuInfoStoreRD::fgCutd[12] = {-999999., 999999., |
34 | -999999., 999999., | |
fd1d0cb9 | 35 | -999999., 999999., |
36 | -999999., 999999., | |
37 | -999999., 999999., | |
38 | -999999., 999999.}; | |
39 | ||
40 | //----------------------------------------------------------------------------- | |
41 | AliDimuInfoStoreRD::AliDimuInfoStoreRD() : | |
42 | TObject(), | |
43 | fMomentum(), | |
44 | fCharge(0), | |
45 | fInvM(0.) | |
46 | { | |
47 | // | |
48 | // default constructor | |
49 | // | |
50 | for (Int_t i=2; i--;) fMuonRef[i] = 0; | |
51 | } | |
52 | ||
53 | //----------------------------------------------------------------------------- | |
54 | AliDimuInfoStoreRD::AliDimuInfoStoreRD(AliMuonInfoStoreRD* const trk0, AliMuonInfoStoreRD* const trk1) : | |
55 | TObject(), | |
56 | fMomentum(), | |
57 | fCharge(0), | |
58 | fInvM(0.) | |
59 | { | |
60 | // | |
61 | // default constructor | |
62 | // | |
63 | fMuonRef[0] = trk0; | |
64 | fMuonRef[1] = trk1; | |
65 | FillDimuInfo(); | |
66 | } | |
67 | ||
68 | //----------------------------------------------------------------------------- | |
69 | AliDimuInfoStoreRD::AliDimuInfoStoreRD(const AliDimuInfoStoreRD &src) : | |
70 | TObject(src), | |
71 | fMomentum(src.fMomentum), | |
72 | fCharge(src.fCharge), | |
73 | fInvM(src.fInvM) | |
74 | { | |
75 | // | |
76 | // copy constructor | |
77 | // | |
78 | for (Int_t i=2; i--;) fMuonRef[i] = src.fMuonRef[i]; | |
79 | } | |
80 | ||
81 | //----------------------------------------------------------------------------- | |
82 | AliDimuInfoStoreRD& AliDimuInfoStoreRD::operator=(const AliDimuInfoStoreRD &src) | |
83 | { | |
84 | // | |
85 | // assignment constructor | |
86 | // | |
87 | if(&src==this) return *this; | |
88 | ||
89 | fMomentum = src.fMomentum; | |
90 | fCharge = src.fCharge; | |
91 | fInvM = src.fInvM; | |
92 | for (Int_t i=2; i--;) fMuonRef[i] = src.fMuonRef[i]; | |
93 | ||
94 | return *this; | |
95 | } | |
96 | ||
97 | //----------------------------------------------------------------------------- | |
98 | AliDimuInfoStoreRD::~AliDimuInfoStoreRD() | |
99 | { | |
100 | // | |
101 | // destructor | |
102 | // | |
103 | } | |
104 | ||
105 | //----------------------------------------------------------------------------- | |
106 | void AliDimuInfoStoreRD::FillDimuInfo() | |
107 | { | |
108 | // fill dimuon candidate info from the corresponding two muon tracks | |
109 | ||
110 | AliMuonInfoStoreRD *trk0 = (AliMuonInfoStoreRD*)fMuonRef[0].GetObject(); | |
111 | AliMuonInfoStoreRD *trk1 = (AliMuonInfoStoreRD*)fMuonRef[1].GetObject(); | |
112 | ||
113 | fMomentum = trk0->Momentum() + trk1->Momentum(); | |
114 | fCharge = trk0->Charge() + trk1->Charge(); | |
115 | ||
116 | Double_t mMu = TDatabasePDG::Instance()->GetParticle(13)->Mass(); | |
117 | TLorentzVector lorentzP0, lorentzP1, lorentzP; | |
118 | lorentzP0.SetVectM(trk0->Momentum(), mMu); | |
119 | lorentzP1.SetVectM(trk1->Momentum(), mMu); | |
120 | lorentzP = lorentzP0 + lorentzP1; | |
121 | fInvM = lorentzP.Mag(); | |
122 | ||
123 | trk0 = 0; | |
124 | trk1 = 0; | |
125 | return; | |
126 | } | |
127 | ||
128 | //----------------------------------------------------------------------------- | |
129 | Bool_t AliDimuInfoStoreRD::DimuSelection() | |
130 | { | |
131 | // select dimuon candidates according to the corresponding two muon tracks cuts | |
132 | ||
1195bb6f | 133 | Double_t cutsOld[12]; |
fd1d0cb9 | 134 | AliMuonInfoStoreRD::SelectionCust(cutsOld); |
135 | AliMuonInfoStoreRD::SetSelectionCuts(AliDimuInfoStoreRD::fgCutd); | |
136 | AliMuonInfoStoreRD *trk0 = (AliMuonInfoStoreRD*)fMuonRef[0].GetObject(); | |
137 | AliMuonInfoStoreRD *trk1 = (AliMuonInfoStoreRD*)fMuonRef[1].GetObject(); | |
138 | if (!trk0->MuonSelection()) { AliMuonInfoStoreRD::SetSelectionCuts(cutsOld); return kFALSE; } | |
139 | if (!trk1->MuonSelection()) { AliMuonInfoStoreRD::SetSelectionCuts(cutsOld); return kFALSE; } | |
140 | ||
141 | AliMuonInfoStoreRD::SetSelectionCuts(cutsOld); | |
142 | return kTRUE; | |
143 | } |