1 /**************************************************************************
2 * Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
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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 **************************************************************************/
16 /////////////////////////////////////////////////////////////
18 // Base class for AOD reconstructed heavy-flavour 3-prong decay
20 // Author: E.Bruna bruna@to.infn.it, F.Prino prino@to.infn.it
21 /////////////////////////////////////////////////////////////
23 #include <TDatabasePDG.h>
24 #include "AliAODRecoDecayHF.h"
25 #include "AliAODRecoDecayHF3Prong.h"
27 ClassImp(AliAODRecoDecayHF3Prong)
29 //--------------------------------------------------------------------------
30 AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong() :
37 // Default Constructor
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),
48 fDist12toPrim(dist12),
52 // Constructor with AliAODVertex for decay vertex
55 for(Int_t i=0;i<3;i++)dcafloat[i]=dca[i];
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),
65 fDist12toPrim(dist12),
69 // Constructor with AliAODVertex for decay vertex and without prongs momenta
72 for(Int_t i=0;i<3;i++)dcafloat[i]=dca[i];
75 //--------------------------------------------------------------------------
76 AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(const AliAODRecoDecayHF3Prong &source) :
77 AliAODRecoDecayHF(source),
78 fSigmaVert(source.fSigmaVert),
79 fDist12toPrim(source.fDist12toPrim),
80 fDist23toPrim(source.fDist23toPrim)
86 //--------------------------------------------------------------------------
87 AliAODRecoDecayHF3Prong &AliAODRecoDecayHF3Prong::operator=(const AliAODRecoDecayHF3Prong &source)
90 // assignment operator
92 if(&source == this) return *this;
93 fOwnPrimaryVtx = source.fOwnPrimaryVtx;
94 fSecondaryVtx = source.fSecondaryVtx;
95 fCharge = source.fCharge;
96 fNProngs = source.fNProngs;
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));
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));
118 fPID = new Double_t[5*GetNProngs()];
119 memcpy(fPID,source.fPID,GetNProngs()*sizeof(Double_t));
122 fDCA = new Double32_t[GetNProngs()*(GetNProngs()-1)/2];
123 memcpy(fDCA,source.fDCA,(GetNProngs()*(GetNProngs()-1)/2)*sizeof(Float_t));
128 //--------------------------------------------------------------------------
129 Bool_t AliAODRecoDecayHF3Prong::SelectDplus(const Double_t *cuts)
132 // This function compares the Dplus with a set of cuts:
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)
147 // If candidate Dplus does not pass the cuts return kFALSE
150 Double_t mDplusPDG = TDatabasePDG::Instance()->GetParticle(411)->Mass();
151 Double_t mDplus=InvMassDplus();
152 if(TMath::Abs(mDplus-mDplusPDG)>cuts[0])return kFALSE;
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
159 for(Int_t i=0;i<3;i++) if(cuts[11]>0 && GetDCA(i)>cuts[11])return kFALSE;
162 if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE;
163 if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE;
166 if(fSigmaVert>cuts[6])return kFALSE;
168 if(DecayLength()<cuts[7])return kFALSE;
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;