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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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 **************************************************************************/
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
56 //--------------------------------------------------------------------------
57 AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(AliAODVertex *vtx2,
58 Double_t *d0,Double_t *d0err,
59 Double_t *dca, Double_t sigvert,
60 Double_t dist12,Double_t dist23, Short_t charge) :
61 AliAODRecoDecayHF(vtx2,3,charge,d0,d0err),
63 fDist12toPrim(dist12),
67 // Constructor with AliAODVertex for decay vertex and without prongs momenta
71 //--------------------------------------------------------------------------
72 AliAODRecoDecayHF3Prong::AliAODRecoDecayHF3Prong(const AliAODRecoDecayHF3Prong &source) :
73 AliAODRecoDecayHF(source),
74 fSigmaVert(source.fSigmaVert),
75 fDist12toPrim(source.fDist12toPrim),
76 fDist23toPrim(source.fDist23toPrim)
82 //--------------------------------------------------------------------------
83 AliAODRecoDecayHF3Prong &AliAODRecoDecayHF3Prong::operator=(const AliAODRecoDecayHF3Prong &source)
86 // assignment operator
88 if(&source == this) return *this;
89 fOwnPrimaryVtx = source.fOwnPrimaryVtx;
90 fSecondaryVtx = source.fSecondaryVtx;
91 fCharge = source.fCharge;
92 fNProngs = source.fNProngs;
95 fEventNumber = source.fEventNumber;
96 fRunNumber = source.fRunNumber;
97 fDist12toPrim= source.fDist12toPrim;
98 fDist23toPrim= source.fDist23toPrim;
99 fSigmaVert= source.fSigmaVert;
100 if(source.GetNProngs()>0) {
101 fd0 = new Double_t[GetNProngs()];
102 fd0err = new Double_t[GetNProngs()];
103 memcpy(fd0,source.fd0,GetNProngs()*sizeof(Double_t));
104 memcpy(fd0err,source.fd0err,GetNProngs()*sizeof(Double_t));
106 fPx = new Double_t[GetNProngs()];
107 fPy = new Double_t[GetNProngs()];
108 fPz = new Double_t[GetNProngs()];
109 memcpy(fPx,source.fPx,GetNProngs()*sizeof(Double_t));
110 memcpy(fPy,source.fPy,GetNProngs()*sizeof(Double_t));
111 memcpy(fPz,source.fPz,GetNProngs()*sizeof(Double_t));
114 fPID = new Double_t[5*GetNProngs()];
115 memcpy(fPID,source.fPID,GetNProngs()*sizeof(Double_t));
118 fDCA = new Double32_t[GetNProngs()*(GetNProngs()-1)/2];
119 memcpy(fDCA,source.fDCA,(GetNProngs()*(GetNProngs()-1)/2)*sizeof(Float_t));
121 if(source.fProngID) {
122 fProngID = new UShort_t[GetNProngs()];
123 memcpy(fProngID,source.fProngID,GetNProngs()*sizeof(UShort_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;
176 //--------------------------------------------------------------------------
177 Bool_t AliAODRecoDecayHF3Prong::SelectDs(const Double_t *cuts,Int_t &okDsKKpi,Int_t &okDspiKK)
180 // This function compares the Ds with a set of cuts
181 // (same variables as D+, for now)
183 // cuts[0] = inv. mass half width [GeV]
184 // cuts[1] = pTK [GeV/c]
185 // cuts[2] = pTPi [GeV/c]
186 // cuts[3] = d0K [cm] lower limit!
187 // cuts[4] = d0Pi [cm] lower limit!
188 // cuts[5] = dist12 (cm)
189 // cuts[6] = sigmavert (cm)
190 // cuts[7] = dist prim-sec (cm)
191 // cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
192 // cuts[9] = cosThetaPoint
193 // cuts[10] = Sum d0^2 (cm^2)
194 // cuts[11] = dca cut (cm)
196 // If candidate Ds does not pass the cuts return kFALSE
198 Double_t mDsKKpi,mDspiKK;
199 okDsKKpi=1; okDspiKK=1;
201 Double_t mDsPDG = TDatabasePDG::Instance()->GetParticle(431)->Mass();
203 mDsKKpi=InvMassDsKKpi();
204 mDspiKK=InvMassDspiKK();
206 if(TMath::Abs(mDsKKpi-mDsPDG)>cuts[0]) okDsKKpi = 0;
207 if(TMath::Abs(mDspiKK-mDsPDG)>cuts[0]) okDspiKK = 0;
208 if(!okDsKKpi && !okDspiKK) return kFALSE;
211 if(TMath::Abs(PtProng(0)) < cuts[1] || TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Kaon1
212 if(TMath::Abs(PtProng(1)) < cuts[1] || TMath::Abs(Getd0Prong(1))<cuts[3])return kFALSE;//Kaon2
213 if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion2
216 for(Int_t i=0;i<3;i++) if(cuts[11]>0 && GetDCA(i)>cuts[11])return kFALSE;
219 if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE;
220 if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE;
223 if(fSigmaVert>cuts[6])return kFALSE;
225 if(DecayLength()<cuts[7])return kFALSE;
227 if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
228 if(CosPointingAngle() < cuts[9])return kFALSE;
229 Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
230 if(sum2<cuts[10])return kFALSE;
234 //--------------------------------------------------------------------------
235 Bool_t AliAODRecoDecayHF3Prong::SelectLc(const Double_t *cuts,Int_t &okLcpKpi,Int_t &okLcpiKp)
238 // This function compares the Lc with a set of cuts
239 // (same variables as D+, for now)
241 // cuts[0] = inv. mass half width [GeV]
242 // cuts[1] = pTP [GeV/c]
243 // cuts[2] = pTPi and pTK [GeV/c]
244 // cuts[3] = d0P [cm] lower limit!
245 // cuts[4] = d0Pi and d0K [cm] lower limit!
246 // cuts[5] = dist12 (cm)
247 // cuts[6] = sigmavert (cm)
248 // cuts[7] = dist prim-sec (cm)
249 // cuts[8] = pM=Max{pT1,pT2,pT3} (GeV/c)
250 // cuts[9] = cosThetaPoint
251 // cuts[10] = Sum d0^2 (cm^2)
252 // cuts[11] = dca cut (cm)
254 // If candidate Lc does not pass the cuts return kFALSE
256 Double_t mLcpKpi,mLcpiKp;
257 okLcpKpi=1; okLcpiKp=1;
259 Double_t mLcPDG = TDatabasePDG::Instance()->GetParticle(4122)->Mass();
261 mLcpKpi=InvMassLcpKpi();
262 mLcpiKp=InvMassLcpiKp();
264 if(TMath::Abs(mLcpKpi-mLcPDG)>cuts[0]) okLcpKpi = 0;
265 if(TMath::Abs(mLcpiKp-mLcPDG)>cuts[0]) okLcpiKp = 0;
266 if(!okLcpKpi && !okLcpiKp) return kFALSE;
269 if(TMath::Abs(PtProng(0)) < cuts[1] || TMath::Abs(Getd0Prong(0))<cuts[3])return kFALSE;//Proton
270 if(TMath::Abs(PtProng(1)) < cuts[2] || TMath::Abs(Getd0Prong(1))<cuts[4])return kFALSE;//Kaon
271 if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion
274 for(Int_t i=0;i<3;i++) if(cuts[11]>0 && GetDCA(i)>cuts[11])return kFALSE;
277 if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE;
278 if(Getd0Prong(0)*Getd0Prong(1)<0. && Getd0Prong(2)*Getd0Prong(1)<0.)return kFALSE;
281 if(fSigmaVert>cuts[6])return kFALSE;
283 if(DecayLength()<cuts[7])return kFALSE;
285 if(TMath::Abs(PtProng(0))<cuts[8] && TMath::Abs(PtProng(1))<cuts[8] && TMath::Abs(PtProng(2))<cuts[8])return kFALSE;
286 if(CosPointingAngle() < cuts[9])return kFALSE;
287 Double_t sum2=Getd0Prong(0)*Getd0Prong(0)+Getd0Prong(1)*Getd0Prong(1)+Getd0Prong(2)*Getd0Prong(2);
288 if(sum2<cuts[10])return kFALSE;