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3244eeed | 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 | // Base class for AOD reconstructed heavy-flavour 2-prong decay | |
19 | // | |
20 | // Author: A.Dainese, andrea.dainese@lnl.infn.it | |
21 | ///////////////////////////////////////////////////////////// | |
22 | ||
23 | #include <TDatabasePDG.h> | |
24 | #include "AliAODRecoDecayHF.h" | |
25 | #include "AliAODRecoDecayHF2Prong.h" | |
26 | ||
27 | ClassImp(AliAODRecoDecayHF2Prong) | |
28 | ||
29 | //-------------------------------------------------------------------------- | |
30 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong() : | |
31 | AliAODRecoDecayHF() | |
32 | { | |
33 | // | |
34 | // Default Constructor | |
35 | // | |
36 | } | |
37 | //-------------------------------------------------------------------------- | |
38 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong(AliAODVertex *vtx2, | |
39 | Double_t *px,Double_t *py,Double_t *pz, | |
40 | Double_t *d0,Double_t *d0err,Float_t dca) : | |
41 | AliAODRecoDecayHF(vtx2,2,0,px,py,pz,d0,d0err) | |
42 | { | |
43 | // | |
44 | // Constructor with AliAODVertex for decay vertex | |
45 | // | |
46 | SetDCA(dca); | |
47 | } | |
48 | //-------------------------------------------------------------------------- | |
49 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong(AliAODVertex *vtx2, | |
50 | Double_t *d0,Double_t *d0err,Float_t dca) : | |
51 | AliAODRecoDecayHF(vtx2,2,0,d0,d0err) | |
52 | { | |
53 | // | |
54 | // Constructor with AliAODVertex for decay vertex and without prongs momenta | |
55 | // | |
56 | SetDCA(dca); | |
57 | } | |
58 | //-------------------------------------------------------------------------- | |
59 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong(const AliAODRecoDecayHF2Prong &source) : | |
60 | AliAODRecoDecayHF(source) | |
61 | { | |
62 | // | |
63 | // Copy constructor | |
64 | // | |
65 | } | |
66 | //-------------------------------------------------------------------------- | |
67 | AliAODRecoDecayHF2Prong &AliAODRecoDecayHF2Prong::operator=(const AliAODRecoDecayHF2Prong &source) | |
68 | { | |
69 | // | |
70 | // assignment operator | |
71 | // | |
72 | if(&source == this) return *this; | |
dcb444c9 | 73 | |
74 | AliAODRecoDecayHF::operator=(source); | |
75 | ||
3244eeed | 76 | return *this; |
77 | } | |
78 | //-------------------------------------------------------------------------- | |
79 | Bool_t AliAODRecoDecayHF2Prong::SelectD0(const Double_t *cuts,Int_t &okD0,Int_t &okD0bar) | |
80 | const { | |
81 | // | |
82 | // This function compares the D0 with a set of cuts: | |
83 | // | |
84 | // cuts[0] = inv. mass half width [GeV] | |
85 | // cuts[1] = dca [cm] | |
86 | // cuts[2] = cosThetaStar | |
87 | // cuts[3] = pTK [GeV/c] | |
88 | // cuts[4] = pTPi [GeV/c] | |
89 | // cuts[5] = d0K [cm] upper limit! | |
90 | // cuts[6] = d0Pi [cm] upper limit! | |
91 | // cuts[7] = d0d0 [cm^2] | |
92 | // cuts[8] = cosThetaPoint | |
93 | // | |
94 | // If the D0/D0bar doesn't pass the cuts it sets the weights to 0 | |
95 | // If neither D0 nor D0bar pass the cuts return kFALSE | |
96 | // | |
97 | Double_t mD0,mD0bar,ctsD0,ctsD0bar; | |
98 | okD0=1; okD0bar=1; | |
99 | ||
100 | Double_t mD0PDG = TDatabasePDG::Instance()->GetParticle(421)->Mass(); | |
101 | ||
102 | if(PtProng(1) < cuts[3] || PtProng(0) < cuts[4]) okD0 = 0; | |
103 | if(PtProng(0) < cuts[3] || PtProng(1) < cuts[4]) okD0bar = 0; | |
104 | if(!okD0 && !okD0bar) return kFALSE; | |
105 | ||
106 | if(TMath::Abs(Getd0Prong(1)) > cuts[5] || | |
107 | TMath::Abs(Getd0Prong(0)) > cuts[6]) okD0 = 0; | |
108 | if(TMath::Abs(Getd0Prong(0)) > cuts[6] || | |
109 | TMath::Abs(Getd0Prong(1)) > cuts[5]) okD0bar = 0; | |
110 | if(!okD0 && !okD0bar) return kFALSE; | |
111 | ||
112 | if(GetDCA() > cuts[1]) { okD0 = okD0bar = 0; return kFALSE; } | |
113 | ||
114 | InvMassD0(mD0,mD0bar); | |
115 | if(TMath::Abs(mD0-mD0PDG) > cuts[0]) okD0 = 0; | |
116 | if(TMath::Abs(mD0bar-mD0PDG) > cuts[0]) okD0bar = 0; | |
117 | if(!okD0 && !okD0bar) return kFALSE; | |
118 | ||
119 | CosThetaStarD0(ctsD0,ctsD0bar); | |
120 | if(TMath::Abs(ctsD0) > cuts[2]) okD0 = 0; | |
121 | if(TMath::Abs(ctsD0bar) > cuts[2]) okD0bar = 0; | |
122 | if(!okD0 && !okD0bar) return kFALSE; | |
123 | ||
124 | if(Prodd0d0() > cuts[7]) { okD0 = okD0bar = 0; return kFALSE; } | |
125 | ||
126 | if(CosPointingAngle() < cuts[8]) { okD0 = okD0bar = 0; return kFALSE; } | |
127 | ||
128 | return kTRUE; | |
129 | } | |
130 | //----------------------------------------------------------------------------- | |
131 | Bool_t AliAODRecoDecayHF2Prong::SelectBtoJPSI(const Double_t *cuts,Int_t &okB) | |
132 | const { | |
133 | // | |
134 | // This function compares the Secondary JPSI candidates with a set of cuts: | |
135 | // | |
136 | // cuts[0] = inv. mass half width [GeV] | |
137 | // cuts[1] = dca [cm] | |
138 | // cuts[2] = cosThetaStar (negative electron) | |
139 | // cuts[3] = pTP [GeV/c] | |
140 | // cuts[4] = pTN [GeV/c] | |
141 | // cuts[5] = d0P [cm] upper limit! | |
142 | // cuts[6] = d0N [cm] upper limit! | |
143 | // cuts[7] = d0d0 [cm^2] | |
144 | // cuts[8] = cosThetaPoint | |
145 | // | |
146 | // If the candidate doesn't pass the cuts it sets the weight to 0 | |
147 | // and return kFALSE | |
148 | // | |
149 | Double_t mJPsi,ctsJPsi; | |
150 | okB=1; | |
151 | ||
152 | Double_t mJPSIPDG = TDatabasePDG::Instance()->GetParticle(443)->Mass(); | |
153 | ||
154 | if(PtProng(1) < cuts[3] || PtProng(0) < cuts[4]) okB = 0; | |
155 | if(!okB) return kFALSE; | |
156 | ||
157 | if(TMath::Abs(Getd0Prong(1)) > cuts[5] || | |
158 | TMath::Abs(Getd0Prong(0)) > cuts[6]) okB = 0; | |
159 | if(!okB) return kFALSE; | |
160 | ||
161 | if(GetDCA() > cuts[1]) { okB = 0; return kFALSE; } | |
162 | ||
163 | mJPsi=InvMassJPSIee(); | |
164 | if(TMath::Abs(mJPsi-mJPSIPDG) > cuts[0]) okB = 0; | |
165 | if(!okB) return kFALSE; | |
166 | ||
167 | ctsJPsi=CosThetaStarJPSI(); | |
168 | if(TMath::Abs(ctsJPsi) > cuts[2]) okB = 0; | |
169 | if(!okB) return kFALSE; | |
170 | ||
171 | if(Prodd0d0() > cuts[7]) { okB = 0; return kFALSE; } | |
172 | ||
173 | if(CosPointingAngle() < cuts[8]) { okB = 0; return kFALSE; } | |
174 | ||
175 | return kTRUE; | |
176 | } | |
177 | //----------------------------------------------------------------------------- |