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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 | /* $Id$ */ | |
17 | ||
18 | ///////////////////////////////////////////////////////////// | |
19 | // | |
20 | // Base class for AOD reconstructed heavy-flavour 2-prong decay | |
21 | // | |
22 | // Author: A.Dainese, andrea.dainese@lnl.infn.it | |
23 | ///////////////////////////////////////////////////////////// | |
24 | ||
25 | #include <TDatabasePDG.h> | |
26 | #include "AliAODRecoDecayHF.h" | |
27 | #include "AliAODRecoDecayHF2Prong.h" | |
28 | ||
29 | ClassImp(AliAODRecoDecayHF2Prong) | |
30 | ||
31 | //-------------------------------------------------------------------------- | |
32 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong() : | |
33 | AliAODRecoDecayHF() | |
34 | { | |
35 | // | |
36 | // Default Constructor | |
37 | // | |
38 | } | |
39 | //-------------------------------------------------------------------------- | |
40 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong(AliAODVertex *vtx2, | |
41 | Double_t *px,Double_t *py,Double_t *pz, | |
42 | Double_t *d0,Double_t *d0err,Float_t dca) : | |
43 | AliAODRecoDecayHF(vtx2,2,0,px,py,pz,d0,d0err) | |
44 | { | |
45 | // | |
46 | // Constructor with AliAODVertex for decay vertex | |
47 | // | |
48 | SetDCA(dca); | |
49 | } | |
50 | //-------------------------------------------------------------------------- | |
51 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong(AliAODVertex *vtx2, | |
52 | Double_t *d0,Double_t *d0err,Float_t dca) : | |
53 | AliAODRecoDecayHF(vtx2,2,0,d0,d0err) | |
54 | { | |
55 | // | |
56 | // Constructor with AliAODVertex for decay vertex and without prongs momenta | |
57 | // | |
58 | SetDCA(dca); | |
59 | } | |
60 | //-------------------------------------------------------------------------- | |
61 | AliAODRecoDecayHF2Prong::AliAODRecoDecayHF2Prong(const AliAODRecoDecayHF2Prong &source) : | |
62 | AliAODRecoDecayHF(source) | |
63 | { | |
64 | // | |
65 | // Copy constructor | |
66 | // | |
67 | } | |
68 | //-------------------------------------------------------------------------- | |
69 | AliAODRecoDecayHF2Prong &AliAODRecoDecayHF2Prong::operator=(const AliAODRecoDecayHF2Prong &source) | |
70 | { | |
71 | // | |
72 | // assignment operator | |
73 | // | |
74 | if(&source == this) return *this; | |
75 | ||
76 | AliAODRecoDecayHF::operator=(source); | |
77 | ||
78 | return *this; | |
79 | } | |
80 | //-------------------------------------------------------------------------- | |
81 | Bool_t AliAODRecoDecayHF2Prong::SelectD0(const Double_t *cuts,Int_t &okD0,Int_t &okD0bar) | |
82 | const { | |
83 | // | |
84 | // This function compares the D0 with a set of cuts: | |
85 | // | |
86 | // cuts[0] = inv. mass half width [GeV] | |
87 | // cuts[1] = dca [cm] | |
88 | // cuts[2] = cosThetaStar | |
89 | // cuts[3] = pTK [GeV/c] | |
90 | // cuts[4] = pTPi [GeV/c] | |
91 | // cuts[5] = d0K [cm] upper limit! | |
92 | // cuts[6] = d0Pi [cm] upper limit! | |
93 | // cuts[7] = d0d0 [cm^2] | |
94 | // cuts[8] = cosThetaPoint | |
95 | // | |
96 | // If the D0/D0bar doesn't pass the cuts it sets the weights to 0 | |
97 | // If neither D0 nor D0bar pass the cuts return kFALSE | |
98 | // | |
99 | Double_t mD0,mD0bar,ctsD0,ctsD0bar; | |
100 | okD0=1; okD0bar=1; | |
101 | ||
102 | Double_t mD0PDG = TDatabasePDG::Instance()->GetParticle(421)->Mass(); | |
103 | ||
104 | if(PtProng(1) < cuts[3] || PtProng(0) < cuts[4]) okD0 = 0; | |
105 | if(PtProng(0) < cuts[3] || PtProng(1) < cuts[4]) okD0bar = 0; | |
106 | if(!okD0 && !okD0bar) return kFALSE; | |
107 | ||
108 | if(TMath::Abs(Getd0Prong(1)) > cuts[5] || | |
109 | TMath::Abs(Getd0Prong(0)) > cuts[6]) okD0 = 0; | |
110 | if(TMath::Abs(Getd0Prong(0)) > cuts[6] || | |
111 | TMath::Abs(Getd0Prong(1)) > cuts[5]) okD0bar = 0; | |
112 | if(!okD0 && !okD0bar) return kFALSE; | |
113 | ||
114 | if(GetDCA() > cuts[1]) { okD0 = okD0bar = 0; return kFALSE; } | |
115 | ||
116 | InvMassD0(mD0,mD0bar); | |
117 | if(TMath::Abs(mD0-mD0PDG) > cuts[0]) okD0 = 0; | |
118 | if(TMath::Abs(mD0bar-mD0PDG) > cuts[0]) okD0bar = 0; | |
119 | if(!okD0 && !okD0bar) return kFALSE; | |
120 | ||
121 | CosThetaStarD0(ctsD0,ctsD0bar); | |
122 | if(TMath::Abs(ctsD0) > cuts[2]) okD0 = 0; | |
123 | if(TMath::Abs(ctsD0bar) > cuts[2]) okD0bar = 0; | |
124 | if(!okD0 && !okD0bar) return kFALSE; | |
125 | ||
126 | if(Prodd0d0() > cuts[7]) { okD0 = okD0bar = 0; return kFALSE; } | |
127 | ||
128 | if(CosPointingAngle() < cuts[8]) { okD0 = okD0bar = 0; return kFALSE; } | |
129 | ||
130 | return kTRUE; | |
131 | } | |
132 | //----------------------------------------------------------------------------- | |
133 | Bool_t AliAODRecoDecayHF2Prong::SelectBtoJPSI(const Double_t *cuts,Int_t &okB) | |
134 | const { | |
135 | // | |
136 | // This function compares the Secondary JPSI candidates with a set of cuts: | |
137 | // | |
138 | // cuts[0] = inv. mass half width [GeV] | |
139 | // cuts[1] = dca [cm] | |
140 | // cuts[2] = cosThetaStar (negative electron) | |
141 | // cuts[3] = pTP [GeV/c] | |
142 | // cuts[4] = pTN [GeV/c] | |
143 | // cuts[5] = d0P [cm] upper limit! | |
144 | // cuts[6] = d0N [cm] upper limit! | |
145 | // cuts[7] = d0d0 [cm^2] | |
146 | // cuts[8] = cosThetaPoint | |
147 | // | |
148 | // If the candidate doesn't pass the cuts it sets the weight to 0 | |
149 | // and return kFALSE | |
150 | // | |
151 | Double_t mJPsi,ctsJPsi; | |
152 | okB=1; | |
153 | ||
154 | Double_t mJPSIPDG = TDatabasePDG::Instance()->GetParticle(443)->Mass(); | |
155 | ||
156 | if(PtProng(1) < cuts[3] || PtProng(0) < cuts[4]) okB = 0; | |
157 | if(!okB) return kFALSE; | |
158 | ||
159 | if(TMath::Abs(Getd0Prong(1)) > cuts[5] || | |
160 | TMath::Abs(Getd0Prong(0)) > cuts[6]) okB = 0; | |
161 | if(!okB) return kFALSE; | |
162 | ||
163 | if(GetDCA() > cuts[1]) { okB = 0; return kFALSE; } | |
164 | ||
165 | mJPsi=InvMassJPSIee(); | |
166 | if(TMath::Abs(mJPsi-mJPSIPDG) > cuts[0]) okB = 0; | |
167 | if(!okB) return kFALSE; | |
168 | ||
169 | ctsJPsi=CosThetaStarJPSI(); | |
170 | if(TMath::Abs(ctsJPsi) > cuts[2]) okB = 0; | |
171 | if(!okB) return kFALSE; | |
172 | ||
173 | if(Prodd0d0() > cuts[7]) { okB = 0; return kFALSE; } | |
174 | ||
175 | if(CosPointingAngle() < cuts[8]) { okB = 0; return kFALSE; } | |
176 | ||
177 | return kTRUE; | |
178 | } | |
179 | //----------------------------------------------------------------------------- |