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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 | ||
27de2dfb | 16 | /* $Id$ */ |
17 | ||
fd1d0cb9 | 18 | ///////////////////////////////////////////////////////////// |
19 | // | |
20 | // class used to extract and store info of MC particles | |
21 | // | |
22 | // Author: X-M. Zhang, zhang@clermont.in2p3.fr | |
23 | // zhangxm@iopp.ccnu.edu.cn | |
24 | ///////////////////////////////////////////////////////////// | |
25 | ||
26 | #include "AliMuonInfoStoreMC.h" | |
27 | #include "AliDimuInfoStoreRD.h" | |
28 | #include "AliDimuInfoStoreMC.h" | |
29 | ||
30 | ClassImp(AliDimuInfoStoreMC) | |
31 | ||
32 | const TString AliDimuInfoStoreMC::fgkStdBranchName("DimuMC"); | |
1195bb6f | 33 | const Int_t AliDimuInfoStoreMC::fgkSourcesN = 6; |
fd1d0cb9 | 34 | |
35 | //----------------------------------------------------------------------------- | |
36 | AliDimuInfoStoreMC::AliDimuInfoStoreMC() : | |
37 | AliDimuInfoStoreRD(), | |
38 | fIsFull(kFALSE), | |
39 | fLorentzP(), | |
40 | fSource(-1) | |
41 | { | |
42 | // | |
43 | // default constructor | |
44 | // | |
45 | } | |
46 | ||
47 | //----------------------------------------------------------------------------- | |
48 | AliDimuInfoStoreMC::AliDimuInfoStoreMC(AliMuonInfoStoreMC* const trk0, AliMuonInfoStoreMC* const trk1, Bool_t full) : | |
49 | AliDimuInfoStoreRD(), | |
50 | fIsFull(full), | |
51 | fLorentzP(), | |
52 | fSource(-1) | |
53 | { | |
54 | // | |
55 | // default constructor | |
56 | // | |
57 | fMuonRef[0] = trk0; | |
58 | fMuonRef[1] = trk1; | |
59 | fLorentzP = trk0->LorentzP() + trk1->LorentzP(); | |
60 | AliDimuInfoStoreRD::FillDimuInfo(); | |
61 | if (fIsFull) this->FindDimuonSourceFull(); | |
62 | else this->FindDimuonSourceFast(); | |
63 | } | |
64 | ||
65 | //----------------------------------------------------------------------------- | |
66 | AliDimuInfoStoreMC::AliDimuInfoStoreMC(const AliDimuInfoStoreMC &src) : | |
67 | AliDimuInfoStoreRD(src), | |
68 | fIsFull(src.fIsFull), | |
69 | fLorentzP(src.fLorentzP), | |
70 | fSource(src.fSource) | |
71 | { | |
72 | // | |
73 | // copy constructor | |
74 | // | |
75 | } | |
76 | ||
77 | //----------------------------------------------------------------------------- | |
78 | AliDimuInfoStoreMC& AliDimuInfoStoreMC::operator=(const AliDimuInfoStoreMC &src) | |
79 | { | |
80 | // | |
81 | // assignment constructor | |
82 | // | |
83 | if(&src==this) return *this; | |
84 | ||
85 | fIsFull = src.fIsFull; | |
86 | fLorentzP = src.fLorentzP; | |
87 | fSource = src.fSource; | |
88 | ||
89 | return *this; | |
90 | } | |
91 | ||
92 | ||
93 | //----------------------------------------------------------------------------- | |
94 | AliDimuInfoStoreMC::~AliDimuInfoStoreMC() | |
95 | { | |
96 | // | |
97 | // destructor | |
98 | // | |
99 | } | |
100 | ||
101 | //----------------------------------------------------------------------------- | |
102 | void AliDimuInfoStoreMC::FindDimuonSourceFast() | |
103 | { | |
104 | // find corr relation of two particles (fast for p-p) | |
105 | ||
106 | AliMuonInfoStoreMC *trk0 = (AliMuonInfoStoreMC*)fMuonRef[0].GetObject(); | |
1195bb6f | 107 | Int_t src0 = trk0->Source(); |
fd1d0cb9 | 108 | if (src0<0 || src0==4 || src0==3) { |
109 | fSource=5; return; | |
110 | } | |
111 | ||
112 | AliMuonInfoStoreMC *trk1 = (AliMuonInfoStoreMC*)fMuonRef[1].GetObject(); | |
1195bb6f | 113 | Int_t src1 = trk1->Source(); |
fd1d0cb9 | 114 | if (src1<0 || src1==4 || src1==3) { |
115 | fSource=5; return; | |
116 | } | |
117 | ||
118 | // Drell-Yan is expected very small at LHC, we ingore it | |
1195bb6f | 119 | Int_t np0 = trk0->ParentsN() - 1; |
fd1d0cb9 | 120 | if (np0<0) { |
121 | fSource=5; return; | |
122 | } | |
1195bb6f | 123 | Int_t np1 = trk1->ParentsN() - 1; |
fd1d0cb9 | 124 | if (np1<0) { |
125 | fSource=5; return; | |
126 | } | |
127 | ||
128 | if (trk0->IsMotherAResonance(np0) && | |
129 | trk1->IsMotherAResonance(np1) && | |
130 | trk0->ParentIndex(np0)==trk1->ParentIndex(np1)) { | |
131 | fSource=4; return; | |
132 | } | |
133 | ||
134 | if (src0==0 && src1==0) { | |
135 | if ((trk0->ParentIndex(0))==(trk1->ParentIndex(0))) | |
136 | fSource = 1; | |
137 | else | |
138 | fSource = 0; | |
139 | return; | |
140 | } | |
141 | ||
142 | if (src0==1 && src1==1) { | |
143 | if ((trk0->ParentIndex(0))==(trk1->ParentIndex(0))) | |
144 | fSource = 3; | |
145 | else | |
146 | fSource = 2; | |
147 | return; | |
148 | } | |
149 | ||
150 | fSource = 5; | |
151 | return; | |
152 | } |