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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 3-prong decay | |
19 | // | |
20 | // Author: E.Bruna bruna@to.infn.it, F.Prino prino@to.infn.it | |
21 | ///////////////////////////////////////////////////////////// | |
22 | ||
23 | #include <TDatabasePDG.h> | |
24 | #include "AliAODRecoDecayHF.h" | |
25 | #include "AliAODRecoDecayHF3Prong.h" | |
26 | ||
27 | ClassImp(AliAODRecoDecayHF3Prong) | |
28 | ||
29 | //-------------------------------------------------------------------------- | |
30 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong() : | |
31 | AliAODRecoDecayHF(), | |
32 | fSigmaVert(0), | |
33 | fDist12toPrim(0), | |
34 | fDist23toPrim(0) | |
35 | { | |
36 | // | |
37 | // Default Constructor | |
38 | // | |
39 | } | |
40 | //-------------------------------------------------------------------------- | |
41 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2, | |
42 | Double_t *px,Double_t *py,Double_t *pz, | |
43 | Double_t *d0,Double_t *d0err, | |
44 | Double_t *dca, Double_t sigvert, | |
45 | Double_t dist12,Double_t dist23,Short_t charge) : | |
46 | AliAODRecoDecayHF(vtx2,3,charge,px,py,pz,d0,d0err), | |
47 | fSigmaVert(sigvert), | |
48 | fDist12toPrim(dist12), | |
49 | fDist23toPrim(dist23) | |
50 | { | |
51 | // | |
52 | // Constructor with AliAODVertex for decay vertex | |
53 | // | |
057c80d4 | 54 | Double_t dcafloat[3]; |
3244eeed | 55 | for(Int_t i=0;i<3;i++)dcafloat[i]=dca[i]; |
56 | SetDCAs(3,dcafloat); | |
57 | } | |
58 | //-------------------------------------------------------------------------- | |
59 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2, | |
60 | Double_t *d0,Double_t *d0err, | |
61 | Double_t *dca, Double_t sigvert, | |
62 | Double_t dist12,Double_t dist23, Short_t charge) : | |
63 | AliAODRecoDecayHF(vtx2,3,charge,d0,d0err), | |
64 | fSigmaVert(sigvert), | |
65 | fDist12toPrim(dist12), | |
66 | fDist23toPrim(dist23) | |
67 | { | |
68 | // | |
69 | // Constructor with AliAODVertex for decay vertex and without prongs momenta | |
70 | // | |
057c80d4 | 71 | Double_t dcafloat[3]; |
3244eeed | 72 | for(Int_t i=0;i<3;i++)dcafloat[i]=dca[i]; |
73 | SetDCAs(3,dcafloat); | |
74 | } | |
75 | //-------------------------------------------------------------------------- | |
76 | AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(const AliAODRecoDecayHF3Prong &source) : | |
77 | AliAODRecoDecayHF(source), | |
78 | fSigmaVert(source.fSigmaVert), | |
79 | fDist12toPrim(source.fDist12toPrim), | |
80 | fDist23toPrim(source.fDist23toPrim) | |
81 | { | |
82 | // | |
83 | // Copy constructor | |
84 | // | |
85 | } | |
86 | //-------------------------------------------------------------------------- | |
87 | AliAODRecoDecayHF3Prong &AliAODRecoDecayHF3Prong::operator=(const AliAODRecoDecayHF3Prong &source) | |
88 | { | |
89 | // | |
90 | // assignment operator | |
91 | // | |
92 | if(&source == this) return *this; | |
93 | fOwnPrimaryVtx = source.fOwnPrimaryVtx; | |
94 | fSecondaryVtx = source.fSecondaryVtx; | |
95 | fCharge = source.fCharge; | |
96 | fNProngs = source.fNProngs; | |
97 | fNDCA = source.fNDCA; | |
98 | fNPID = source.fNPID; | |
99 | fEventNumber = source.fEventNumber; | |
100 | fRunNumber = source.fRunNumber; | |
101 | fDist12toPrim= source.fDist12toPrim; | |
102 | fDist23toPrim= source.fDist23toPrim; | |
103 | fSigmaVert= source.fSigmaVert; | |
104 | if(source.GetNProngs()>0) { | |
105 | fd0 = new Double_t[GetNProngs()]; | |
106 | fd0err = new Double_t[GetNProngs()]; | |
107 | memcpy(fd0,source.fd0,GetNProngs()*sizeof(Double_t)); | |
108 | memcpy(fd0err,source.fd0err,GetNProngs()*sizeof(Double_t)); | |
109 | if(source.fPx) { | |
110 | fPx = new Double_t[GetNProngs()]; | |
111 | fPy = new Double_t[GetNProngs()]; | |
112 | fPz = new Double_t[GetNProngs()]; | |
113 | memcpy(fPx,source.fPx,GetNProngs()*sizeof(Double_t)); | |
114 | memcpy(fPy,source.fPy,GetNProngs()*sizeof(Double_t)); | |
115 | memcpy(fPz,source.fPz,GetNProngs()*sizeof(Double_t)); | |
116 | } | |
117 | if(source.fPID) { | |
118 | fPID = new Double_t[5*GetNProngs()]; | |
119 | memcpy(fPID,source.fPID,GetNProngs()*sizeof(Double_t)); | |
120 | } | |
121 | if(source.fDCA) { | |
057c80d4 | 122 | fDCA = new Double32_t[GetNProngs()*(GetNProngs()-1)/2]; |
3244eeed | 123 | memcpy(fDCA,source.fDCA,(GetNProngs()*(GetNProngs()-1)/2)*sizeof(Float_t)); |
124 | } | |
125 | } | |
126 | return *this; | |
127 | } | |
128 | //-------------------------------------------------------------------------- | |
129 | Bool_t AliAODRecoDecayHF3Prong::SelectDplus(const Double_t *cuts) | |
130 | const { | |
131 | // | |
132 | // This function compares the Dplus with a set of cuts: | |
133 | // | |
134 | // cuts[0] = inv. mass half width [GeV] | |
135 | // cuts[1] = pTK [GeV/c] | |
136 | // cuts[2] = pTPi [GeV/c] | |
137 | // cuts[3] = d0K [cm] lower limit! | |
138 | // cuts[4] = d0Pi [cm] lower limit! | |
139 | // cuts[5] = dist12 (cm) | |
140 | // cuts[6] = sigmavert (cm) | |
141 | // cuts[7] = dist prim-sec (cm) | |
142 | // cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c) | |
143 | // cuts[9] = cosThetaPoint | |
144 | // cuts[10] = Sum d0^2 (cm^2) | |
145 | // cuts[11] = dca cut (cm) | |
146 | // | |
147 | // If candidate Dplus does not pass the cuts return kFALSE | |
148 | // | |
149 | ||
150 | Double_t mDplusPDG = TDatabasePDG::Instance()->GetParticle(411)->Mass(); | |
151 | Double_t mDplus=InvMassDplus(); | |
152 | if(TMath::Abs(mDplus-mDplusPDG)>cuts[0])return kFALSE; | |
153 | //single track | |
154 | if(TMath::Abs(PtProng(1)) < cuts[1] || TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon | |
155 | if(TMath::Abs(PtProng(0)) < cuts[2] || TMath::Abs(Getd0Prong(0))<cuts[4])return kFALSE;//Pion1 | |
156 | if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion2 | |
157 | ||
158 | //DCA | |
159 | for(Int_t i=0;i<3;i++) if(cuts[11]>0 && GetDCA(i)>cuts[11])return kFALSE; | |
160 | ||
161 | //2track cuts | |
162 | if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE; | |
163 | if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE; | |
164 | ||
165 | //sec vert | |
166 | if(fSigmaVert>cuts[6])return kFALSE; | |
167 | ||
168 | if(DecayLength()<cuts[7])return kFALSE; | |
169 | ||
170 | if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE; | |
171 | if(CosPointingAngle() < cuts[9])return kFALSE; | |
172 | Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2); | |
173 | if(sum2<cuts[10])return kFALSE; | |
174 | return kTRUE; | |
175 | } |