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 *
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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)
46 fPtAccCut=new Float_t[fProngs];
47 fEtaAccCut=new Float_t[fProngs];
48 for(Int_t iP=0; iP<fProngs; iP++){
56 //_____________________________________
57 AliCFVertexingHF2Prong& AliCFVertexingHF2Prong::operator=(const AliCFVertexingHF2Prong& c)
64 AliCFVertexingHF::operator=(c);
69 //__________________________________________
70 Bool_t AliCFVertexingHF2Prong::SetRecoCandidateParam(AliAODRecoDecayHF *recoCand)
73 // setting the recontructed candidate
76 Bool_t bSignAssoc = kFALSE;
77 fRecoCandidate = recoCand;
78 if (!fRecoCandidate) {
79 AliError("fRecoCandidate not found, problem in assignement\n");
83 if (fRecoCandidate->GetPrimaryVtx()) AliDebug(3,"fReco Candidate has a pointer to PrimVtx\n");
84 if (recoCand->GetPrimaryVtx()) AliDebug(3,"Reco Cand has a pointer to PrimVtx\n");
87 Int_t pdgDgD0toKpi[2]={321,211};
88 Int_t nentries = fmcArray->GetEntriesFast();
90 AliDebug(3,Form("nentries = %d\n", nentries));
92 Int_t mcLabel = fRecoCandidate->MatchToMC(pdgCand,fmcArray,2,pdgDgD0toKpi);
93 if (mcLabel == -1) return bSignAssoc;
95 if (fRecoCandidate->NumberOfFakeDaughters()>0){
96 fFake = 0; // fake candidate
97 if (fFakeSelection==1) return bSignAssoc;
99 if (fRecoCandidate->NumberOfFakeDaughters()==0){
100 fFake = 2; // non-fake candidate
101 if (fFakeSelection==2) return bSignAssoc;
105 fmcPartCandidate = dynamic_cast<AliAODMCParticle*>(fmcArray->At(fmcLabel));
106 if (!fmcPartCandidate){
107 AliDebug(3,"No part candidate");
114 //______________________________________________
115 Bool_t AliCFVertexingHF2Prong::GetGeneratedValuesFromMCParticle(Double_t* vectorMC)
118 // collecting all the necessary info (pt, y, cosThetaStar, ptPi, ptKa, cT) from MC particle
121 Bool_t bGenValues = kFALSE;
122 Double_t vtx1[3] = {0,0,0}; // primary vertex
123 Double_t vtx2daughter0[3] = {0,0,0}; // secondary vertex from daughter 0
124 Double_t vtx2daughter1[3] = {0,0,0}; // secondary vertex from daughter 1
125 fmcPartCandidate->XvYvZv(vtx1); // cm
127 Int_t daughter0 = fmcPartCandidate->GetDaughter(0);
128 Int_t daughter1 = fmcPartCandidate->GetDaughter(1);
129 AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0));
130 AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1));
131 if(!mcPartDaughter0 || !mcPartDaughter1) return bGenValues;
133 // getting vertex from daughters
134 mcPartDaughter0->XvYvZv(vtx2daughter0); // cm
135 mcPartDaughter1->XvYvZv(vtx2daughter1); //cm
136 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) {
137 AliError("Daughters have different secondary vertex, skipping the track");
143 // always instantiate the AliAODRecoDecay with the positive daughter first, the negative second
144 AliAODMCParticle* positiveDaugh = mcPartDaughter0;
145 AliAODMCParticle* negativeDaugh = mcPartDaughter1;
146 if (mcPartDaughter0->GetPdgCode()<0 && mcPartDaughter1->GetPdgCode()>0){
147 // inverting in case the positive daughter is the second one
148 positiveDaugh = mcPartDaughter1;
149 negativeDaugh = mcPartDaughter0;
151 // getting the momentum from the daughters
152 Double_t px[2] = {positiveDaugh->Px(), negativeDaugh->Px()};
153 Double_t py[2] = {positiveDaugh->Py(), negativeDaugh->Py()};
154 Double_t pz[2] = {positiveDaugh->Pz(), negativeDaugh->Pz()};
156 Double_t d0[2] = {0.,0.};
158 AliAODRecoDecayHF* decay = new AliAODRecoDecayHF(vtx1,vtx2daughter0,nprongs,charge,px,py,pz,d0);
160 Double_t cosThetaStar = 0.;
161 Double_t cosThetaStarD0 = 0.;
162 Double_t cosThetaStarD0bar = 0.;
163 cosThetaStarD0 = decay->CosThetaStar(1,421,211,321);
164 cosThetaStarD0bar = decay->CosThetaStar(0,421,321,211);
165 if (fmcPartCandidate->GetPdgCode() == 421){ // D0
166 AliDebug(3, Form("D0, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
167 cosThetaStar = cosThetaStarD0;
169 else if (fmcPartCandidate->GetPdgCode() == -421){ // D0bar{
170 AliDebug(3, Form("D0bar, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
171 cosThetaStar = cosThetaStarD0bar;
174 AliWarning("There are problems!! particle was expected to be either a D0 or a D0bar, check...");
177 if (cosThetaStar < -1 || cosThetaStar > 1) {
178 AliWarning("Invalid value for cosine Theta star, returning");
183 Double_t cT = decay->Ct(421);
184 // get the pT of the daughters
188 if (TMath::Abs(mcPartDaughter0->GetPdgCode()) == 211) {
189 pTpi = mcPartDaughter0->Pt();
190 pTK = mcPartDaughter1->Pt();
193 pTpi = mcPartDaughter1->Pt();
194 pTK = mcPartDaughter0->Pt();
197 vectorMC[0] = fmcPartCandidate->Pt();
198 vectorMC[1] = fmcPartCandidate->Y() ;
199 vectorMC[2] = cosThetaStar ;
202 vectorMC[5] = cT*1.E4 ; // in micron
203 vectorMC[6] = 0.; // dummy value, meaningless in MC
204 vectorMC[7] = 0.; // dummy value, meaningless in MC, in micron
205 vectorMC[8] = 0.; // dummy value, meaningless in MC, in micron
206 vectorMC[9] = -100000.; // dummy value, meaningless in MC, in micron^2
207 vectorMC[10] = 1.01; // dummy value, meaningless in MC
208 vectorMC[11] = fmcPartCandidate->Phi();
209 vectorMC[12] = fzMCVertex; // z of reconstructed of primary vertex
210 vectorMC[13] = fCentValue; //reconstructed centrality
211 vectorMC[14] = 1.; // always filling with 1 at MC level
217 //____________________________________________
218 Bool_t AliCFVertexingHF2Prong::GetRecoValuesFromCandidate(Double_t *vectorReco) const
221 // Getting the reconstructed values from the candidate
224 Bool_t bFillRecoValues=kFALSE;
226 AliAODRecoDecayHF2Prong *d0toKpi = (AliAODRecoDecayHF2Prong*)fRecoCandidate;
228 if (d0toKpi->GetPrimaryVtx())AliDebug(3,"d0toKpi has primary vtx\n");
229 if (fRecoCandidate->GetPrimaryVtx())AliDebug(3,"fRecoCandidate has primary vtx\n");
231 Double_t pt = d0toKpi->Pt();
232 Double_t rapidity = d0toKpi->YD0();
234 Double_t cosThetaStar = 9999.;
237 Double_t dca = d0toKpi->GetDCA();
240 Double_t d0xd0 = d0toKpi->Prodd0d0();
241 Double_t cosPointingAngle = d0toKpi->CosPointingAngle();
242 Double_t phi = d0toKpi->Phi();
243 Int_t pdgCode = fmcPartCandidate->GetPdgCode();
246 cosThetaStar = d0toKpi->CosThetaStarD0();
247 pTpi = d0toKpi->PtProng(0);
248 pTK = d0toKpi->PtProng(1);
249 d0pi = d0toKpi->Getd0Prong(0);
250 d0K = d0toKpi->Getd0Prong(1);
251 invMass=d0toKpi->InvMassD0();
254 cosThetaStar = d0toKpi->CosThetaStarD0bar();
255 pTpi = d0toKpi->PtProng(1);
256 pTK = d0toKpi->PtProng(0);
257 d0pi = d0toKpi->Getd0Prong(1);
258 d0K = d0toKpi->Getd0Prong(0);
259 invMass= d0toKpi->InvMassD0bar();
262 Double_t cT = d0toKpi->CtD0();
265 vectorReco[1] = rapidity;
266 vectorReco[2] = cosThetaStar;
267 vectorReco[3] = pTpi;
269 vectorReco[5] = cT*1.E4; // in micron
270 vectorReco[6] = dca*1.E4; // in micron
271 vectorReco[7] = d0pi*1.E4; // in micron
272 vectorReco[8] = d0K*1.E4; // in micron
273 vectorReco[9] = d0xd0*1.E8; // in micron^2
274 vectorReco[10] = cosPointingAngle; // in micron
275 vectorReco[11] = phi;
276 vectorReco[12] = fzPrimVertex; // z of reconstructed of primary vertex
277 vectorReco[13] = fCentValue; //reconstructed centrality
278 vectorReco[14] = fFake; // whether the reconstructed candidate was a fake (fFake = 0) or not (fFake = 2)
280 bFillRecoValues = kTRUE;
282 return bFillRecoValues;
285 //_____________________________________________________________
286 Bool_t AliCFVertexingHF2Prong::CheckMCChannelDecay() const
289 // checking the MC decay channel
291 Bool_t checkCD = kFALSE;
292 Int_t daughter0 = fmcPartCandidate->GetDaughter(0);
293 Int_t daughter1 = fmcPartCandidate->GetDaughter(1);
294 AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0));
295 AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1));
297 if (!mcPartDaughter0 || !mcPartDaughter1) {
298 AliDebug (2,"Problems in the MC Daughters\n");
302 if (!(TMath::Abs(mcPartDaughter0->GetPdgCode())==321 &&
303 TMath::Abs(mcPartDaughter1->GetPdgCode())==211) &&
304 !(TMath::Abs(mcPartDaughter0->GetPdgCode())==211 &&
305 TMath::Abs(mcPartDaughter1->GetPdgCode())==321)) {
306 AliDebug(2, "The D0 MC doesn't come from a Kpi decay, skipping!!");