1 /**************************************************************************
2 * Copyright(c) 1998-2009, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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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 //-----------------------------------------------------------------------
17 // Class for HF corrections as a function of many variables and step
18 // Author : C. Zampolli, CERN
19 // D. Caffarri, Univ & INFN Padova caffarri@pd.infn.it
20 // Base class for HF Unfolding - agrelli@uu.nl
21 //-----------------------------------------------------------------------
23 #include "AliAODRecoDecayHF2Prong.h"
24 #include "AliAODMCParticle.h"
25 #include "AliAODEvent.h"
26 #include "TClonesArray.h"
27 #include "AliCFVertexingHF.h"
28 #include "AliESDtrack.h"
29 #include "TDatabasePDG.h"
31 #include "AliCFVertexingHF2Prong.h"
32 #include "AliCFContainer.h"
34 ClassImp(AliCFVertexingHF2Prong)
37 //_________________________________________
38 AliCFVertexingHF2Prong::AliCFVertexingHF2Prong(TClonesArray *mcArray, UShort_t originDselection):
39 AliCFVertexingHF(mcArray, originDselection)
49 //_____________________________________
50 AliCFVertexingHF2Prong& AliCFVertexingHF2Prong::operator=(const AliCFVertexingHF2Prong& c)
57 AliCFVertexingHF::operator=(c);
62 //__________________________________________
63 Bool_t AliCFVertexingHF2Prong::SetRecoCandidateParam(AliAODRecoDecayHF *recoCand)
66 // setting the recontructed candidate
69 Bool_t bSignAssoc = kFALSE;
70 fRecoCandidate = recoCand;
71 if (!fRecoCandidate) {
72 AliError("fRecoCandidate not found, problem in assignement\n");
76 if (fRecoCandidate->GetPrimaryVtx()) AliDebug(3,"fReco Candidate has a pointer to PrimVtx\n");
77 if (recoCand->GetPrimaryVtx()) AliDebug(3,"Reco Cand has a pointer to PrimVtx\n");
80 Int_t pdgDgD0toKpi[2]={321,211};
81 Int_t nentries = fmcArray->GetEntriesFast();
83 AliDebug(3,Form("nentries = %d\n", nentries));
85 Int_t mcLabel = fRecoCandidate->MatchToMC(pdgCand,fmcArray,2,pdgDgD0toKpi);
86 if (mcLabel == -1) return bSignAssoc;
88 fmcPartCandidate = dynamic_cast<AliAODMCParticle*>(fmcArray->At(fmcLabel));
89 if (!fmcPartCandidate){
90 AliDebug(3,"No part candidate");
97 //______________________________________________
98 Bool_t AliCFVertexingHF2Prong::GetGeneratedValuesFromMCParticle(Double_t* vectorMC)
101 // collecting all the necessary info (pt, y, cosThetaStar, ptPi, ptKa, cT) from MC particle
104 Bool_t bGenValues = kFALSE;
105 Double_t vtx1[3] = {0,0,0}; // primary vertex
106 Double_t vtx2daughter0[3] = {0,0,0}; // secondary vertex from daughter 0
107 Double_t vtx2daughter1[3] = {0,0,0}; // secondary vertex from daughter 1
108 fmcPartCandidate->XvYvZv(vtx1); // cm
110 Int_t daughter0 = fmcPartCandidate->GetDaughter(0);
111 Int_t daughter1 = fmcPartCandidate->GetDaughter(1);
112 AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0));
113 AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1));
115 // getting vertex from daughters
116 mcPartDaughter0->XvYvZv(vtx2daughter0); // cm
117 mcPartDaughter1->XvYvZv(vtx2daughter1); //cm
118 if (TMath::Abs(vtx2daughter0[0] - vtx2daughter1[0]) > 1E-5 || TMath::Abs(vtx2daughter0[1] - vtx2daughter1[1]) > 1E-5 || TMath::Abs(vtx2daughter0[2] - vtx2daughter1[2])>1E-5) {
119 AliError("Daughters have different secondary vertex, skipping the track");
125 // always instantiate the AliAODRecoDecay with the positive daughter first, the negative second
126 AliAODMCParticle* positiveDaugh = mcPartDaughter0;
127 AliAODMCParticle* negativeDaugh = mcPartDaughter1;
128 if (mcPartDaughter0->GetPdgCode()<0 && mcPartDaughter1->GetPdgCode()>0){
129 // inverting in case the positive daughter is the second one
130 positiveDaugh = mcPartDaughter1;
131 negativeDaugh = mcPartDaughter0;
133 // getting the momentum from the daughters
134 Double_t px[2] = {positiveDaugh->Px(), negativeDaugh->Px()};
135 Double_t py[2] = {positiveDaugh->Py(), negativeDaugh->Py()};
136 Double_t pz[2] = {positiveDaugh->Pz(), negativeDaugh->Pz()};
138 Double_t d0[2] = {0.,0.};
140 AliAODRecoDecayHF* decay = new AliAODRecoDecayHF(vtx1,vtx2daughter0,nprongs,charge,px,py,pz,d0);
142 Double_t cosThetaStar = 0.;
143 Double_t cosThetaStarD0 = 0.;
144 Double_t cosThetaStarD0bar = 0.;
145 cosThetaStarD0 = decay->CosThetaStar(1,421,211,321);
146 cosThetaStarD0bar = decay->CosThetaStar(0,421,321,211);
147 if (fmcPartCandidate->GetPdgCode() == 421){ // D0
148 AliDebug(3, Form("D0, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
149 cosThetaStar = cosThetaStarD0;
151 else if (fmcPartCandidate->GetPdgCode() == -421){ // D0bar{
152 AliDebug(3, Form("D0bar, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
153 cosThetaStar = cosThetaStarD0bar;
156 AliWarning("There are problems!! particle was expected to be either a D0 or a D0bar, check...");
159 if (cosThetaStar < -1 || cosThetaStar > 1) {
160 AliWarning("Invalid value for cosine Theta star, returning");
165 Double_t cT = decay->Ct(421);
166 // get the pT of the daughters
170 if (TMath::Abs(mcPartDaughter0->GetPdgCode()) == 211) {
171 pTpi = mcPartDaughter0->Pt();
172 pTK = mcPartDaughter1->Pt();
175 pTpi = mcPartDaughter1->Pt();
176 pTK = mcPartDaughter0->Pt();
179 vectorMC[0] = fmcPartCandidate->Pt();
180 vectorMC[1] = fmcPartCandidate->Y() ;
181 vectorMC[2] = cosThetaStar ;
184 vectorMC[5] = cT*1.E4 ; // in micron
185 vectorMC[6] = 0.; // dummy value, meaningless in MC
186 vectorMC[7] = 0.; // dummy value, meaningless in MC, in micron
187 vectorMC[8] = 0.; // dummy value, meaningless in MC, in micron
188 vectorMC[9] = -100000.; // dummy value, meaningless in MC, in micron^2
189 vectorMC[10] = 1.01; // dummy value, meaningless in MC
190 vectorMC[11] = fmcPartCandidate->Phi();
191 vectorMC[12] = fzMCVertex; // z of reconstructed of primary vertex
196 //____________________________________________
197 Bool_t AliCFVertexingHF2Prong::GetRecoValuesFromCandidate(Double_t *vectorReco) const
200 // Getting the reconstructed values from the candidate
203 Bool_t bFillRecoValues=kFALSE;
205 AliAODRecoDecayHF2Prong *d0toKpi = (AliAODRecoDecayHF2Prong*)fRecoCandidate;
207 if (d0toKpi->GetPrimaryVtx())AliDebug(3,"d0toKpi has primary vtx\n");
208 if (fRecoCandidate->GetPrimaryVtx())AliDebug(3,"fRecoCandidate has primary vtx\n");
210 Double_t pt = d0toKpi->Pt();
211 Double_t rapidity = d0toKpi->YD0();
213 Double_t cosThetaStar = 9999.;
216 Double_t dca = d0toKpi->GetDCA();
219 Double_t d0xd0 = d0toKpi->Prodd0d0();
220 Double_t cosPointingAngle = d0toKpi->CosPointingAngle();
221 Double_t phi = d0toKpi->Phi();
222 Int_t pdgCode = fmcPartCandidate->GetPdgCode();
225 cosThetaStar = d0toKpi->CosThetaStarD0();
226 pTpi = d0toKpi->PtProng(0);
227 pTK = d0toKpi->PtProng(1);
228 d0pi = d0toKpi->Getd0Prong(0);
229 d0K = d0toKpi->Getd0Prong(1);
230 invMass=d0toKpi->InvMassD0();
233 cosThetaStar = d0toKpi->CosThetaStarD0bar();
234 pTpi = d0toKpi->PtProng(1);
235 pTK = d0toKpi->PtProng(0);
236 d0pi = d0toKpi->Getd0Prong(1);
237 d0K = d0toKpi->Getd0Prong(0);
238 invMass= d0toKpi->InvMassD0bar();
241 Double_t cT = d0toKpi->CtD0();
244 vectorReco[1] = rapidity;
245 vectorReco[2] = cosThetaStar;
246 vectorReco[3] = pTpi;
248 vectorReco[5] = cT*1.E4; // in micron
249 vectorReco[6] = dca*1.E4; // in micron
250 vectorReco[7] = d0pi*1.E4; // in micron
251 vectorReco[8] = d0K*1.E4; // in micron
252 vectorReco[9] = d0xd0*1.E8; // in micron^2
253 vectorReco[10] = cosPointingAngle; // in micron
254 vectorReco[11] = phi;
255 vectorReco[12] = fzPrimVertex; // z of reconstructed of primary vertex
256 bFillRecoValues = kTRUE;
258 return bFillRecoValues;
261 //_____________________________________________________________
262 Bool_t AliCFVertexingHF2Prong::CheckMCChannelDecay() const
265 // checking the MC decay channel
267 Bool_t checkCD = kFALSE;
268 Int_t daughter0 = fmcPartCandidate->GetDaughter(0);
269 Int_t daughter1 = fmcPartCandidate->GetDaughter(1);
270 AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0));
271 AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1));
273 if (!mcPartDaughter0 || !mcPartDaughter1) {
274 AliDebug (2,"Problems in the MC Daughters\n");
278 if (!(TMath::Abs(mcPartDaughter0->GetPdgCode())==321 &&
279 TMath::Abs(mcPartDaughter1->GetPdgCode())==211) &&
280 !(TMath::Abs(mcPartDaughter0->GetPdgCode())==211 &&
281 TMath::Abs(mcPartDaughter1->GetPdgCode())==321)) {
282 AliDebug(2, "The D0 MC doesn't come from a Kpi decay, skipping!!");