1 /**************************************************************************
2 * Copyright(c) 1998-2007, 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 *
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 **************************************************************************/
16 //----------------------------------------------------------------------------
17 // Implementation of the heavy-flavour vertexing analysis class
18 // Candidates are store as objects deriving from AliAODRecoDecay.
19 // An example of usage can be found in the macro AliVertexingHFTest.C.
20 // Can be used as a task of AliAnalysisManager by means of the interface
21 // class AliAnalysisTaskVertexingHF.
23 // Origin: E.Bruna, G.E.Bruno, A.Dainese, F.Prino, R.Romita
24 //----------------------------------------------------------------------------
27 #include <TDatabasePDG.h>
29 #include "AliESDEvent.h"
30 #include "AliVertexerTracks.h"
31 #include "AliKFParticle.h"
32 #include "AliESDVertex.h"
34 #include "AliAODRecoDecay.h"
35 #include "AliAODRecoDecayHF.h"
36 #include "AliAODRecoDecayHF2Prong.h"
37 #include "AliAODRecoDecayHF3Prong.h"
38 #include "AliAODRecoDecayHF4Prong.h"
39 #include "AliAnalysisVertexingHF.h"
41 ClassImp(AliAnalysisVertexingHF)
43 //----------------------------------------------------------------------------
44 AliAnalysisVertexingHF::AliAnalysisVertexingHF():
46 fSecVtxWithKF(kFALSE),
47 fRecoPrimVtxSkippingTrks(kFALSE),
48 fRmTrksFromPrimVtx(kFALSE),
61 // Default constructor
69 //--------------------------------------------------------------------------
70 AliAnalysisVertexingHF::AliAnalysisVertexingHF(const AliAnalysisVertexingHF &source) :
73 fSecVtxWithKF(source.fSecVtxWithKF),
74 fRecoPrimVtxSkippingTrks(source.fRecoPrimVtxSkippingTrks),
75 fRmTrksFromPrimVtx(source.fRmTrksFromPrimVtx),
77 fDebug(source.fDebug),
78 fD0toKpi(source.fD0toKpi),
79 fJPSItoEle(source.fJPSItoEle),
80 f3Prong(source.f3Prong),
81 f4Prong(source.f4Prong),
82 fITSrefit(source.fITSrefit),
83 fBothSPD(source.fBothSPD),
84 fMinITSCls(source.fMinITSCls),
85 fMinPtCut(source.fMinPtCut),
86 fMind0rphiCut(source.fMind0rphiCut)
91 for(Int_t i=0; i<9; i++) fD0toKpiCuts[i]=source.fD0toKpiCuts[i];
92 for(Int_t i=0; i<9; i++) fBtoJPSICuts[i]=source.fBtoJPSICuts[i];
93 for(Int_t i=0; i<12; i++) fDplusCuts[i]=source.fDplusCuts[i];
94 for(Int_t i=0; i<1; i++) fDsCuts[i]=source.fDsCuts[i];
95 for(Int_t i=0; i<1; i++) fLcCuts[i]=source.fLcCuts[i];
97 //--------------------------------------------------------------------------
98 AliAnalysisVertexingHF &AliAnalysisVertexingHF::operator=(const AliAnalysisVertexingHF &source)
101 // assignment operator
103 if(&source == this) return *this;
104 fBzkG = source.fBzkG;
105 fSecVtxWithKF = source.fSecVtxWithKF;
106 fRecoPrimVtxSkippingTrks = source.fRecoPrimVtxSkippingTrks;
107 fRmTrksFromPrimVtx = source.fRmTrksFromPrimVtx;
109 fDebug = source.fDebug;
110 fD0toKpi = source.fD0toKpi;
111 fJPSItoEle = source.fJPSItoEle;
112 f3Prong = source.f3Prong;
113 f4Prong = source.f4Prong;
114 fITSrefit = source.fITSrefit;
115 fBothSPD = source.fBothSPD;
116 fMinITSCls = source.fMinITSCls;
117 fMinPtCut = source.fMinPtCut;
118 fMind0rphiCut = source.fMind0rphiCut;
120 for(Int_t i=0; i<9; i++) fD0toKpiCuts[i]=source.fD0toKpiCuts[i];
121 for(Int_t i=0; i<9; i++) fBtoJPSICuts[i]=source.fBtoJPSICuts[i];
122 for(Int_t i=0; i<12; i++) fDplusCuts[i]=source.fDplusCuts[i];
123 for(Int_t i=0; i<1; i++) fDsCuts[i]=source.fDsCuts[i];
124 for(Int_t i=0; i<1; i++) fLcCuts[i]=source.fLcCuts[i];
128 //----------------------------------------------------------------------------
129 AliAnalysisVertexingHF::~AliAnalysisVertexingHF() {
131 if(fV1) { delete fV1; fV1=0; }
133 //----------------------------------------------------------------------------
134 void AliAnalysisVertexingHF::FindCandidates(AliESDEvent *esd,TTree treeout[])
136 // Find heavy-flavour vertex candidates
139 AliAODRecoDecayHF2Prong *io2Prong = new AliAODRecoDecayHF2Prong();
140 AliAODRecoDecayHF3Prong *io3Prong = new AliAODRecoDecayHF3Prong();
141 AliAODRecoDecayHF4Prong *io4Prong = new AliAODRecoDecayHF4Prong();
143 Int_t itreeD0toKpi=-1,itreeJPSItoEle=-1,itree3Prong=-1,itree4Prong=-1;
144 Int_t initEntriesD0toKpi=0,initEntriesJPSItoEle=0,initEntries3Prong=0,initEntries4Prong=0;
147 treeout[itree].SetBranchAddress("D0toKpi",&io2Prong);
149 initEntriesD0toKpi = treeout[itreeD0toKpi].GetEntries();
152 itreeJPSItoEle=itree;
153 treeout[itree].SetBranchAddress("JPSItoEle",&io2Prong);
155 initEntriesJPSItoEle = treeout[itreeJPSItoEle].GetEntries();
159 treeout[itree].SetBranchAddress("Charmto3Prong",&io3Prong);
161 initEntries3Prong = treeout[itree3Prong].GetEntries();
165 treeout[itree].SetBranchAddress("D0to4Prong",&io4Prong);
167 initEntries4Prong = treeout[itree4Prong].GetEntries();
169 delete io2Prong; io2Prong = NULL;
170 delete io3Prong; io3Prong = NULL;
171 delete io4Prong; io4Prong = NULL;
173 Int_t iTrkP1,iTrkP2,iTrkN1,iTrkN2,trkEntries;
174 Int_t nTrksP=0,nTrksN=0;
175 Double_t xdummy,ydummy,dcap1n1,dcap1n2,dcap2n1,dcap1p2,dcan1n2;
176 Bool_t okD0=kFALSE,okJPSI=kFALSE,ok3Prong=kFALSE,ok4Prong=kFALSE;
177 AliESDtrack *postrack1 = 0;
178 AliESDtrack *postrack2 = 0;
179 AliESDtrack *negtrack1 = 0;
180 AliESDtrack *negtrack2 = 0;
181 Double_t dcaMax = fD0toKpiCuts[1];
182 if(dcaMax<fBtoJPSICuts[1]) dcaMax=fBtoJPSICuts[1];
183 if(dcaMax<fDplusCuts[11]) dcaMax=fDplusCuts[11];
184 if(fDebug) printf(" dca cut set to %f cm\n",dcaMax);
186 Int_t ev = (Int_t)esd->GetEventNumberInFile();
187 printf("--- Finding candidates in event %d\n",ev);
189 fBzkG = (Double_t)esd->GetMagneticField();
191 trkEntries = (Int_t)esd->GetNumberOfTracks();
192 printf(" Number of tracks: %d\n",trkEntries);
193 if(trkEntries<2) return;
195 // retrieve primary vertex from the AliESDEvent
196 if(!esd->GetPrimaryVertex()) {
197 printf(" No vertex in AliESD\n");
200 AliESDVertex copy(*(esd->GetPrimaryVertex()));
201 SetPrimaryVertex(©);
203 // call function which applies sigle-track selection and
204 // separetes positives and negatives
205 TObjArray trksP(trkEntries/2); // will become TClonesArray
206 TObjArray trksN(trkEntries/2); // will become TClonesArray
207 SelectTracks(esd,trksP,nTrksP,
210 printf(" Pos. tracks: %d Neg. tracks: %d\n",nTrksP,nTrksN);
212 TObjArray *twoTrackArray1 = new TObjArray(2);
213 TObjArray *twoTrackArray2 = new TObjArray(2);
214 TObjArray *threeTrackArray = new TObjArray(3);
215 TObjArray *fourTrackArray = new TObjArray(4);
217 // LOOP ON POSITIVE TRACKS
218 for(iTrkP1=0; iTrkP1<nTrksP; iTrkP1++) {
219 if(fDebug) if(iTrkP1%1==0) printf(" Processing positive track number %d of %d\n",iTrkP1,nTrksP);
220 // get track from track array
221 postrack1 = (AliESDtrack*)trksP.UncheckedAt(iTrkP1);
223 // LOOP ON NEGATIVE TRACKS
224 for(iTrkN1=0; iTrkN1<nTrksN; iTrkN1++) {
225 if(fDebug) if(iTrkN1%1==0) printf(" Processing negative track number %d of %d\n",iTrkN1,nTrksN);
226 // get track from tracks array
227 negtrack1 = (AliESDtrack*)trksN.UncheckedAt(iTrkN1);
228 // DCA between the two tracks
229 dcap1n1 = postrack1->GetDCA(negtrack1,fBzkG,xdummy,ydummy);
230 if(dcap1n1>dcaMax) { negtrack1=0; continue; }
232 twoTrackArray1->AddAt(postrack1,0);
233 twoTrackArray1->AddAt(negtrack1,1);
234 AliESDVertex *vertexp1n1 = ReconstructSecondaryVertex(twoTrackArray1);
235 if(vertexp1n1->GetNContributors()!=2) {
236 if(fDebug) printf("two-track vertexing failed\n");
237 negtrack1=0; continue;
239 if(fD0toKpi || fJPSItoEle) {
240 io2Prong = Make2Prong(twoTrackArray1,esd,vertexp1n1,dcap1n1,okD0,okJPSI);
241 if(okD0) treeout[itreeD0toKpi].Fill();
242 if(okJPSI) treeout[itreeJPSItoEle].Fill();
243 delete io2Prong; io2Prong=NULL;
246 twoTrackArray1->Clear();
247 if(!f3Prong && !f4Prong) {
253 // 2nd LOOP ON POSITIVE TRACKS
254 for(iTrkP2=iTrkP1+1; iTrkP2<nTrksP; iTrkP2++) {
255 // get track from tracks array
256 postrack2 = (AliESDtrack*)trksP.UncheckedAt(iTrkP2);
257 dcap2n1 = postrack2->GetDCA(negtrack1,fBzkG,xdummy,ydummy);
258 if(dcap2n1>dcaMax) { postrack2=0; continue; }
259 dcap1p2 = postrack2->GetDCA(postrack1,fBzkG,xdummy,ydummy);
260 if(dcap1p2>dcaMax) { postrack2=0; continue; }
263 twoTrackArray2->AddAt(postrack2,0);
264 twoTrackArray2->AddAt(negtrack1,1);
265 AliESDVertex *vertexp2n1 = ReconstructSecondaryVertex(twoTrackArray2);
267 threeTrackArray->AddAt(postrack1,0);
268 threeTrackArray->AddAt(negtrack1,1);
269 threeTrackArray->AddAt(postrack2,2);
270 io3Prong = Make3Prong(threeTrackArray,esd,vertexp1n1,vertexp2n1,dcap1n1,dcap2n1,dcap1p2,ok3Prong);
271 if(ok3Prong) treeout[itree3Prong].Fill();
272 if(io3Prong) delete io3Prong; io3Prong=NULL;
275 // 3rd LOOP ON NEGATIVE TRACKS (for 4 prong)
276 for(iTrkN2=iTrkN1+1; iTrkN2<nTrksN; iTrkN2++) {
277 // get track from tracks array
278 negtrack2 = (AliESDtrack*)trksN.UncheckedAt(iTrkN2);
279 dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
280 if(dcap1n2>dcaMax) { negtrack2=0; continue; }
282 fourTrackArray->AddAt(postrack1,0);
283 fourTrackArray->AddAt(negtrack1,1);
284 fourTrackArray->AddAt(postrack2,2);
285 fourTrackArray->AddAt(negtrack2,3);
286 io4Prong = Make4Prong(fourTrackArray,esd,vertexp1n1,vertexp2n1,dcap1n1,dcap1n2,dcap2n1,ok4Prong);
287 if(ok4Prong) treeout[itree4Prong].Fill();
288 delete io4Prong; io4Prong=NULL;
289 fourTrackArray->Clear();
291 } // end loop on negative tracks
295 } // end 2nd loop on positive tracks
296 twoTrackArray2->Clear();
298 // 2nd LOOP ON NEGATIVE TRACKS
299 for(iTrkN2=iTrkN1+1; iTrkN2<nTrksN; iTrkN2++) {
300 // get track from tracks array
301 negtrack2 = (AliESDtrack*)trksN.UncheckedAt(iTrkN2);
302 dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
303 if(dcap1n2>dcaMax) { negtrack2=0; continue; }
304 dcan1n2 = negtrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
305 if(dcan1n2>dcaMax) { negtrack2=0; continue; }
308 twoTrackArray2->AddAt(postrack1,0);
309 twoTrackArray2->AddAt(negtrack2,1);
310 AliESDVertex *vertexp1n2 = ReconstructSecondaryVertex(twoTrackArray2);
312 threeTrackArray->AddAt(negtrack1,0);
313 threeTrackArray->AddAt(postrack1,1);
314 threeTrackArray->AddAt(negtrack2,2);
315 io3Prong = Make3Prong(threeTrackArray,esd,vertexp1n1,vertexp1n2,dcap1n1,dcap1n2,dcan1n2,ok3Prong);
316 if(ok3Prong) treeout[itree3Prong].Fill();
317 if(io3Prong) delete io3Prong; io3Prong=NULL;
321 } // end 2nd loop on negative tracks
322 twoTrackArray2->Clear();
326 } // end 1st loop on negative tracks
329 } // end 1st loop on positive tracks
333 //printf("delete twoTr 1\n");
334 twoTrackArray1->Delete(); delete twoTrackArray1;
335 //printf("delete twoTr 2\n");
336 twoTrackArray2->Delete(); delete twoTrackArray2;
337 //printf("delete threeTr 1\n");
338 threeTrackArray->Clear();
339 threeTrackArray->Delete(); delete threeTrackArray;
340 //printf("delete fourTr 1\n");
341 fourTrackArray->Delete(); delete fourTrackArray;
344 // create a copy of this class to be written to output file
345 //AliAnalysisVertexingHF *copy = (AliAnalysisVertexingHF*)this->Clone("AnalysisVertexingHF");
349 printf(" D0->Kpi: event %d = %d; total = %d;\n",
350 (Int_t)esd->GetEventNumberInFile(),
351 (Int_t)treeout[itreeD0toKpi].GetEntries()-initEntriesD0toKpi,
352 (Int_t)treeout[itreeD0toKpi].GetEntries());
355 printf(" JPSI->ee: event %d = %d; total = %d;\n",
356 (Int_t)esd->GetEventNumberInFile(),
357 (Int_t)treeout[itreeJPSItoEle].GetEntries()-initEntriesJPSItoEle,
358 (Int_t)treeout[itreeJPSItoEle].GetEntries());
361 printf(" Charm->3Prong: event %d = %d; total = %d;\n",
362 (Int_t)esd->GetEventNumberInFile(),
363 (Int_t)treeout[itree3Prong].GetEntries()-initEntries3Prong,
364 (Int_t)treeout[itree3Prong].GetEntries());
367 printf(" Charm->4Prong: event %d = %d; total = %d;\n",
368 (Int_t)esd->GetEventNumberInFile(),
369 (Int_t)treeout[itree4Prong].GetEntries()-initEntries4Prong,
370 (Int_t)treeout[itree4Prong].GetEntries());
376 //----------------------------------------------------------------------------
377 AliAODRecoDecayHF2Prong *AliAnalysisVertexingHF::Make2Prong(
378 TObjArray *twoTrackArray1,AliESDEvent *esd,
379 AliESDVertex *secVertexESD,Double_t dca,
380 Bool_t &okD0,Bool_t &okJPSI) const
382 // Make 2Prong candidates and check if they pass D0toKpi or BtoJPSI
383 // reconstruction cuts
384 // G.E.Bruno (J/psi), A.Dainese (D0->Kpi)
386 okD0=kFALSE; okJPSI=kFALSE;
388 Double_t px[2],py[2],pz[2],d0[2],d0err[2];
390 AliESDtrack *postrack = (AliESDtrack*)twoTrackArray1->UncheckedAt(0);
391 AliESDtrack *negtrack = (AliESDtrack*)twoTrackArray1->UncheckedAt(1);
393 // propagate tracks to secondary vertex, to compute inv. mass
394 postrack->RelateToVertex(secVertexESD,fBzkG,10.);
395 negtrack->RelateToVertex(secVertexESD,fBzkG,10.);
397 Double_t momentum[3];
398 postrack->GetPxPyPz(momentum);
399 px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
400 negtrack->GetPxPyPz(momentum);
401 px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
404 // invariant mass cut (try to improve coding here..)
405 Bool_t okMassCut=kFALSE;
406 if(!okMassCut && fD0toKpi) if(SelectInvMass(0,2,px,py,pz)) okMassCut=kTRUE;
407 if(!okMassCut && fJPSItoEle) if(SelectInvMass(1,2,px,py,pz)) okMassCut=kTRUE;
409 if(fDebug) printf(" candidate didn't pass mass cut\n");
414 AliESDVertex *primVertex = fV1;
415 AliESDVertex *ownPrimVertex=0;
417 // primary vertex from *other* tracks in the event
418 if(fRecoPrimVtxSkippingTrks || fRmTrksFromPrimVtx) {
419 ownPrimVertex = OwnPrimaryVertex(2,twoTrackArray1,esd);
423 if(ownPrimVertex->GetNContributors()<2) {
424 delete ownPrimVertex;
427 primVertex = ownPrimVertex;
432 Float_t d0z0[2],covd0z0[3];
433 postrack->RelateToVertex(primVertex,fBzkG,10.);
434 postrack->GetImpactParameters(d0z0,covd0z0);
436 d0err[0] = TMath::Sqrt(covd0z0[0]);
437 negtrack->RelateToVertex(primVertex,fBzkG,10.);
438 negtrack->GetImpactParameters(d0z0,covd0z0);
440 d0err[1] = TMath::Sqrt(covd0z0[0]);
442 // create the object AliAODRecoDecayHF2Prong
443 Double_t pos[3],cov[6];
444 secVertexESD->GetXYZ(pos); // position
445 secVertexESD->GetCovMatrix(cov); //covariance matrix
446 AliAODVertex *secVertexAOD = new AliAODVertex(pos,cov,secVertexESD->GetChi2toNDF());
447 primVertex->GetXYZ(pos); // position
448 primVertex->GetCovMatrix(cov); //covariance matrix
449 AliAODVertex *primVertexAOD = new AliAODVertex(pos,cov,primVertex->GetChi2toNDF());
450 AliAODRecoDecayHF2Prong *the2Prong = new AliAODRecoDecayHF2Prong(secVertexAOD,px,py,pz,d0,d0err,dca);
451 the2Prong->SetOwnSecondaryVtx(secVertexAOD);//temporary
452 the2Prong->SetOwnPrimaryVtx(primVertexAOD);
455 Int_t checkD0,checkD0bar;
456 if(fD0toKpi) okD0 = the2Prong->SelectD0(fD0toKpiCuts,checkD0,checkD0bar);
457 //if(fDebug && fD0toKpi) printf(" %d\n",(Int_t)okD0);
458 // select J/psi from B
460 if(fJPSItoEle) okJPSI = the2Prong->SelectBtoJPSI(fBtoJPSICuts,checkJPSI);
461 //if(fDebug && fJPSItoEle) printf(" %d\n",(Int_t)okJPSI);
465 // get PID info from ESD
467 postrack->GetESDpid(esdpid0);
469 negtrack->GetESDpid(esdpid1);
471 for(Int_t i=0;i<5;i++) {
472 esdpid[i] = esdpid0[i];
473 esdpid[5+i] = esdpid1[i];
475 the2Prong->SetPID(2,esdpid);
478 if(ownPrimVertex) delete ownPrimVertex;
482 //----------------------------------------------------------------------------
483 AliAODRecoDecayHF3Prong* AliAnalysisVertexingHF::Make3Prong(
484 TObjArray *threeTrackArray,AliESDEvent *esd,
485 AliESDVertex *vertexp1n1,AliESDVertex *vertexp2n1,
486 Double_t dcap1n1,Double_t dcap2n1,Double_t dcap1p2,
487 Bool_t &ok3Prong) const
489 // Make 3Prong candidates and check if they pass Dplus or Ds or Lambdac
490 // reconstruction cuts
494 Double_t px[3],py[3],pz[3],d0[3],d0err[3];//d0z[3];
495 Float_t d0z0[2],covd0z0[3];
498 AliESDtrack *postrack1 = (AliESDtrack*)threeTrackArray->UncheckedAt(0);
499 AliESDtrack *negtrack = (AliESDtrack*)threeTrackArray->UncheckedAt(1);
500 AliESDtrack *postrack2 = (AliESDtrack*)threeTrackArray->UncheckedAt(2);
502 AliESDVertex *primVertex = fV1;
504 postrack1->RelateToVertex(primVertex,fBzkG,10.);
505 negtrack->RelateToVertex(primVertex,fBzkG,10.);
506 postrack2->RelateToVertex(primVertex,fBzkG,10.);
508 Double_t momentum[3];
509 postrack1->GetPxPyPz(momentum);
510 px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
511 negtrack->GetPxPyPz(momentum);
512 px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
513 postrack2->GetPxPyPz(momentum);
514 px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
516 postrack1->GetImpactParameters(d0z0,covd0z0);
518 d0err[0] = TMath::Sqrt(covd0z0[0]);
519 negtrack->GetImpactParameters(d0z0,covd0z0);
521 d0err[1] = TMath::Sqrt(covd0z0[0]);
522 postrack2->GetImpactParameters(d0z0,covd0z0);
524 d0err[2] = TMath::Sqrt(covd0z0[0]);
527 // invariant mass cut for D+, Ds, Lc
528 Bool_t okMassCut=kFALSE;
529 if(!okMassCut && f3Prong) if(SelectInvMass(2,3,px,py,pz)) okMassCut=kTRUE;
531 if(fDebug) printf(" candidate didn't pass mass cut\n");
536 Short_t charge=(Short_t)(postrack1->GetSign()*postrack2->GetSign()*negtrack->GetSign());
538 AliESDVertex *ownPrimVertex = 0;
539 // primary vertex from *other* tracks in the event
540 if(fRecoPrimVtxSkippingTrks || fRmTrksFromPrimVtx) {
541 ownPrimVertex = OwnPrimaryVertex(3,threeTrackArray,esd);
545 if(ownPrimVertex->GetNContributors()<2) {
546 delete ownPrimVertex;
549 primVertex = ownPrimVertex;
554 // create the object AliAODRecoDecayHF3Prong
555 AliESDVertex* secVert3Prong = ReconstructSecondaryVertex(threeTrackArray);
556 Double_t pos[3],cov[6],sigmavert;
557 secVert3Prong->GetXYZ(pos); // position
558 secVert3Prong->GetCovMatrix(cov); //covariance matrix
559 sigmavert=secVert3Prong->GetDispersion();
561 AliAODVertex *secVert3PrAOD = new AliAODVertex(pos,cov,secVert3Prong->GetChi2toNDF());
562 primVertex->GetXYZ(pos); // position
563 primVertex->GetCovMatrix(cov); //covariance matrix
564 AliAODVertex *primVertexAOD = new AliAODVertex(pos,cov,primVertex->GetChi2toNDF());
565 Double_t dca[3]={dcap1n1,dcap2n1,dcap1p2};
567 Double_t dist12=TMath::Sqrt((vertexp1n1->GetXv()-pos[0])*(vertexp1n1->GetXv()-pos[0])+(vertexp1n1->GetYv()-pos[1])*(vertexp1n1->GetYv()-pos[1])+(vertexp1n1->GetZv()-pos[2])*(vertexp1n1->GetZv()-pos[2]));
568 Double_t dist23=TMath::Sqrt((vertexp2n1->GetXv()-pos[0])*(vertexp2n1->GetXv()-pos[0])+(vertexp2n1->GetYv()-pos[1])*(vertexp2n1->GetYv()-pos[1])+(vertexp2n1->GetZv()-pos[2])*(vertexp2n1->GetZv()-pos[2]));
570 AliAODRecoDecayHF3Prong *the3Prong = new AliAODRecoDecayHF3Prong(secVert3PrAOD,px,py,pz,d0,d0err,dca,sigmavert,dist12,dist23,charge);
571 the3Prong->SetOwnPrimaryVtx(primVertexAOD);
572 the3Prong->SetOwnSecondaryVtx(secVert3PrAOD);//temporary
575 // select D+->Kpipi, Ds->KKpi, Lc->pKpi
579 if(the3Prong->SelectDplus(fDplusCuts)) ok3Prong = kTRUE;
580 if(the3Prong->SelectDs(fDsCuts,ok1,ok2)) ok3Prong = kTRUE;
581 if(the3Prong->SelectLc(fLcCuts,ok1,ok2)) ok3Prong = kTRUE;
583 //if(fDebug) printf("ok3Prong: %d\n",(Int_t)ok3Prong);
585 // get PID info from ESD
587 postrack1->GetESDpid(esdpid0);
589 negtrack->GetESDpid(esdpid1);
591 postrack2->GetESDpid(esdpid2);
595 for(Int_t i=0;i<5;i++) {
596 esdpid[i] = esdpid0[i];
597 esdpid[5+i] = esdpid1[i];
598 esdpid[10+i] = esdpid2[i];
600 the3Prong->SetPID(3,esdpid);
603 if(ownPrimVertex) delete ownPrimVertex;
607 //----------------------------------------------------------------------------
608 AliAODRecoDecayHF4Prong* AliAnalysisVertexingHF::Make4Prong(
609 TObjArray *fourTrackArray,AliESDEvent *esd,
610 AliESDVertex *vertexp1n1,AliESDVertex *vertexp2n1,
611 Double_t dcap1n1,Double_t dcap1n2,Double_t dcap2n1,
612 Bool_t &ok4Prong) const
614 // Make 4Prong candidates and check if they pass D0toKpipipi
615 // reconstruction cuts
616 // G.E.Bruno, R.Romita
620 Double_t px[4],py[4],pz[4],d0[4],d0err[4];//d0z[3];
621 //Float_t d0z0[2],covd0z0[3];
623 px[0]=dcap1n1*dcap1n2*dcap2n1; // TO BE CHANGED (done just to removed compilation warning about dca... not used)
628 AliESDtrack *postrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(0);
629 AliESDtrack *negtrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(1);
630 AliESDtrack *postrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(2);
631 AliESDtrack *negtrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(3);
633 AliESDVertex *primVertex = fV1;
635 postrack1->RelateToVertex(primVertex,fBzkG,10.);
636 negtrack1->RelateToVertex(primVertex,fBzkG,10.);
637 postrack2->RelateToVertex(primVertex,fBzkG,10.);
638 negtrack2->RelateToVertex(primVertex,fBzkG,10.);
640 Double_t momentum[3];
641 postrack1->GetPxPyPz(momentum);
642 px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
643 negtrack1->GetPxPyPz(momentum);
644 px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
645 postrack2->GetPxPyPz(momentum);
646 px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
647 negtrack2->GetPxPyPz(momentum);
648 px[3] = momentum[0]; py[3] = momentum[1]; pz[3] = momentum[2];
650 // invariant mass cut for rho or D0 (try to improve coding here..)
651 //Bool_t okMassCut=kFALSE;
652 //if(!okMassCut) if(SelectInvMass(2,3,px,py,pz)) okMassCut=kTRUE;
654 // if(fDebug) printf(" candidate didn't pass mass cut\n");
658 AliESDVertex *ownPrimVertex = 0;
659 // primary vertex from *other* tracks in the event
660 if(fRecoPrimVtxSkippingTrks || fRmTrksFromPrimVtx) {
661 ownPrimVertex = OwnPrimaryVertex(4,fourTrackArray,esd);
665 if(ownPrimVertex->GetNContributors()<2) {
666 delete ownPrimVertex;
669 primVertex = ownPrimVertex;
674 // create the object AliAODRecoDecayHF4Prong
675 AliESDVertex* secVert4Prong = ReconstructSecondaryVertex(fourTrackArray);
676 Double_t pos[3],cov[6],sigmavert;
677 secVert4Prong->GetXYZ(pos); // position
678 secVert4Prong->GetCovMatrix(cov); //covariance matrix
679 sigmavert=secVert4Prong->GetDispersion();
681 AliAODVertex *secVert4PrAOD = new AliAODVertex(pos,cov,secVert4Prong->GetChi2toNDF());
682 primVertex->GetXYZ(pos); // position
683 primVertex->GetCovMatrix(cov); //covariance matrix
684 AliAODVertex *primVertexAOD = new AliAODVertex(pos,cov,primVertex->GetChi2toNDF());
685 //Double_t dca[6]={dcap1n1,dcap2n1,dcap1p2,0.,0.,0.}; //
686 Double_t dca[6]={0.,0.,0.,0.,0.,0.}; // modify it
688 Double_t dist12=TMath::Sqrt((vertexp1n1->GetXv()-pos[0])*(vertexp1n1->GetXv()-pos[0])+(vertexp1n1->GetYv()-pos[1])*(vertexp1n1->GetYv()-pos[1])+(vertexp1n1->GetZv()-pos[2])*(vertexp1n1->GetZv()-pos[2]));
689 Double_t dist23=TMath::Sqrt((vertexp2n1->GetXv()-pos[0])*(vertexp2n1->GetXv()-pos[0])+(vertexp2n1->GetYv()-pos[1])*(vertexp2n1->GetYv()-pos[1])+(vertexp2n1->GetZv()-pos[2])*(vertexp2n1->GetZv()-pos[2]));
690 Double_t dist14=0.; // to be implemented
691 Double_t dist34=0.; // to be implemented
693 //AliAODRecoDecayHF4Prong *the4Prong = new AliAODRecoDecayHF4Prong(secVert4PrAOD,px,py,pz,d0,d0err,dca,sigmavert,dist12,dist23,charge);
694 AliAODRecoDecayHF4Prong *the4Prong = new AliAODRecoDecayHF4Prong(secVert4PrAOD,px,py,pz,d0,d0err,dca,dist12,dist23,dist14,dist34,charge);
695 the4Prong->SetOwnPrimaryVtx(primVertexAOD);
696 the4Prong->SetOwnSecondaryVtx(secVert4PrAOD);//temporary
699 // use the following two lines once AliAODRecoDecayHF4Prong::SelectD0 is available
700 // select D0->Kpipipi
701 //Int_t checkD0,checkD0bar;
702 // ok4Prong=the4Prong->SelectD0(fD04pCuts,checkD0,checkD0bar);
703 ok4Prong=kFALSE; //for the time being ...
706 // get PID info from ESD
708 postrack1->GetESDpid(esdpid0);
710 negtrack1->GetESDpid(esdpid1);
712 postrack2->GetESDpid(esdpid2);
714 negtrack2->GetESDpid(esdpid3);
717 for(Int_t i=0;i<5;i++) {
718 esdpid[i] = esdpid0[i];
719 esdpid[5+i] = esdpid1[i];
720 esdpid[10+i] = esdpid2[i];
721 esdpid[15+i] = esdpid3[i];
723 the4Prong->SetPID(4,esdpid);
725 if(ownPrimVertex) delete ownPrimVertex;
729 //-----------------------------------------------------------------------------
730 AliESDVertex* AliAnalysisVertexingHF::OwnPrimaryVertex(Int_t ntrks,
732 AliESDEvent *esd) const
734 // Returns primary vertex specific to this candidate
736 AliVertexerTracks *vertexer1 = new AliVertexerTracks(esd->GetMagneticField());
737 AliESDVertex *ownPrimVertex = 0;
739 // recalculating the vertex
740 if(fRecoPrimVtxSkippingTrks) {
741 if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraint")) {
742 Float_t diamondcovxy[3];
743 esd->GetDiamondCovXY(diamondcovxy);
744 Double_t pos[3]={esd->GetDiamondX(),esd->GetDiamondY(),0.};
745 Double_t cov[6]={diamondcovxy[0],diamondcovxy[1],diamondcovxy[2],0.,0.,10.};
746 AliESDVertex *diamond = new AliESDVertex(pos,cov,1.,1);
747 vertexer1->SetVtxStart(diamond);
748 delete diamond; diamond=NULL;
749 if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraintOnlyFitter"))
750 vertexer1->SetOnlyFitter();
754 for(Int_t i=0; i<ntrks; i++) {
755 t = (AliESDtrack*)trkArray->UncheckedAt(i);
756 skipped[i] = (Int_t)t->GetID();
758 vertexer1->SetSkipTracks(ntrks,skipped);
759 ownPrimVertex = (AliESDVertex*)vertexer1->FindPrimaryVertex(esd);
762 // removing the prongs tracks
763 if(fRmTrksFromPrimVtx) {
764 TTree *rmTree = new TTree("trksTree","tree with tracks to be removed");
765 AliESDtrack *esdTrack = 0;
766 rmTree->Branch("tracks","AliESDtrack",&esdTrack);
768 for(Int_t i=0; i<ntrks; i++) {
769 t = (AliESDtrack*)trkArray->UncheckedAt(i);
770 esdTrack = new AliESDtrack(*t);
774 Float_t diamondxy[2]={esd->GetDiamondX(),esd->GetDiamondY()};
775 ownPrimVertex = vertexer1->RemoveTracksFromVertex(fV1,rmTree,diamondxy);
776 delete rmTree; rmTree=NULL;
779 delete vertexer1; vertexer1=NULL;
781 return ownPrimVertex;
783 //-----------------------------------------------------------------------------
784 void AliAnalysisVertexingHF::PrintStatus() const {
785 // Print parameters being used
787 printf("Preselections:\n");
788 printf(" fITSrefit = %d\n",(Int_t)fITSrefit);
789 printf(" fBothSPD = %d\n",(Int_t)fBothSPD);
790 printf(" fMinITSCls = %d\n",fMinITSCls);
791 printf(" fMinPtCut = %f GeV/c\n",fMinPtCut);
792 printf(" fMind0rphiCut = %f cm\n",fMind0rphiCut);
794 printf("Secondary vertex with Kalman filter package (AliKFParticle)\n");
796 printf("Secondary vertex with AliVertexerTracks\n");
798 if(fRecoPrimVtxSkippingTrks) printf("RecoPrimVtxSkippingTrks\n");
799 if(fRmTrksFromPrimVtx) printf("RmTrksFromPrimVtx\n");
801 printf("Reconstruct D0->Kpi candidates with cuts:\n");
802 printf(" |M-MD0| [GeV] < %f\n",fD0toKpiCuts[0]);
803 printf(" dca [cm] < %f\n",fD0toKpiCuts[1]);
804 printf(" cosThetaStar < %f\n",fD0toKpiCuts[2]);
805 printf(" pTK [GeV/c] > %f\n",fD0toKpiCuts[3]);
806 printf(" pTpi [GeV/c] > %f\n",fD0toKpiCuts[4]);
807 printf(" |d0K| [cm] < %f\n",fD0toKpiCuts[5]);
808 printf(" |d0pi| [cm] < %f\n",fD0toKpiCuts[6]);
809 printf(" d0d0 [cm^2] < %f\n",fD0toKpiCuts[7]);
810 printf(" cosThetaPoint > %f\n",fD0toKpiCuts[8]);
813 printf("Reconstruct J/psi from B candidates with cuts:\n");
814 printf(" |M-MJPSI| [GeV] < %f\n",fBtoJPSICuts[0]);
815 printf(" dca [cm] < %f\n",fBtoJPSICuts[1]);
816 printf(" cosThetaStar < %f\n",fBtoJPSICuts[2]);
817 printf(" pTP [GeV/c] > %f\n",fBtoJPSICuts[3]);
818 printf(" pTN [GeV/c] > %f\n",fBtoJPSICuts[4]);
819 printf(" |d0P| [cm] < %f\n",fBtoJPSICuts[5]);
820 printf(" |d0N| [cm] < %f\n",fBtoJPSICuts[6]);
821 printf(" d0d0 [cm^2] < %f\n",fBtoJPSICuts[7]);
822 printf(" cosThetaPoint > %f\n",fBtoJPSICuts[8]);
825 printf("Reconstruct 3 prong candidates.\n");
826 printf(" D+->Kpipi cuts:\n");
827 printf(" |M-MD+| [GeV] < %f\n",fDplusCuts[0]);
828 printf(" pTK [GeV/c] > %f\n",fDplusCuts[1]);
829 printf(" pTPi [GeV/c] > %f\n",fDplusCuts[2]);
830 printf(" |d0K| [cm] > %f\n",fDplusCuts[3]);
831 printf(" |d0Pi| [cm] > %f\n",fDplusCuts[4]);
832 printf(" dist12 [cm] < %f\n",fDplusCuts[5]);
833 printf(" sigmavert [cm] < %f\n",fDplusCuts[6]);
834 printf(" dist prim-sec [cm] > %f\n",fDplusCuts[7]);
835 printf(" pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fDplusCuts[8]);
836 printf(" cosThetaPoint > %f\n",fDplusCuts[9]);
837 printf(" Sum d0^2 [cm^2] > %f\n",fDplusCuts[10]);
838 printf(" dca cut [cm] < %f\n",fDplusCuts[11]);
839 printf(" Ds->KKpi cuts:\n");
840 printf(" |M-MDs| [GeV] < %f\n",fDsCuts[0]);
841 printf(" Lc->pKpi cuts:\n");
842 printf(" |M-MD+| [GeV] < %f\n",fLcCuts[0]);
847 //-----------------------------------------------------------------------------
848 Bool_t AliAnalysisVertexingHF::SelectInvMass(Int_t decay,
852 Double_t *pz) const {
853 // Check invariant mass cut
855 Short_t dummycharge=0;
856 Double_t *dummyd0 = new Double_t[nprongs];
857 AliAODRecoDecay *rd = new AliAODRecoDecay(0x0,nprongs,dummycharge,px,py,pz,dummyd0);
860 UInt_t pdg2[2],pdg3[3];
863 Bool_t retval=kFALSE;
867 pdg2[0]=211; pdg2[1]=321;
868 mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
869 minv = rd->InvMass(nprongs,pdg2);
870 if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
871 pdg2[0]=321; pdg2[1]=211;
872 minv = rd->InvMass(nprongs,pdg2);
873 if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
876 pdg2[0]=11; pdg2[1]=11;
877 mPDG=TDatabasePDG::Instance()->GetParticle(443)->Mass();
878 minv = rd->InvMass(nprongs,pdg2);
879 if(TMath::Abs(minv-mPDG)<fBtoJPSICuts[0]) retval=kTRUE;
882 pdg3[0]=211; pdg3[1]=321; pdg3[2]=211;
883 mPDG=TDatabasePDG::Instance()->GetParticle(411)->Mass();
884 minv = rd->InvMass(nprongs,pdg3);
885 if(TMath::Abs(minv-mPDG)<fDplusCuts[0]) retval=kTRUE;
887 pdg3[0]=321; pdg3[1]=321; pdg3[2]=211;
888 mPDG=TDatabasePDG::Instance()->GetParticle(431)->Mass();
889 minv = rd->InvMass(nprongs,pdg3);
890 if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
891 pdg3[0]=211; pdg3[1]=321; pdg3[2]=321;
892 minv = rd->InvMass(nprongs,pdg3);
893 if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
895 pdg3[0]=2212; pdg3[1]=321; pdg3[2]=211;
896 mPDG=TDatabasePDG::Instance()->GetParticle(4122)->Mass();
897 minv = rd->InvMass(nprongs,pdg3);
898 if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
899 pdg3[0]=211; pdg3[1]=321; pdg3[2]=2212;
900 minv = rd->InvMass(nprongs,pdg3);
901 if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
911 //-----------------------------------------------------------------------------
912 void AliAnalysisVertexingHF::SelectTracks(AliESDEvent *esd,
913 TObjArray &trksP,Int_t &nTrksP,
914 TObjArray &trksN,Int_t &nTrksN) const
916 // Fill two TObjArrays with positive and negative tracks and
917 // apply single-track preselection
921 Int_t entries = (Int_t)esd->GetNumberOfTracks();
923 // transfer ITS tracks from ESD to arrays and to a tree
924 for(Int_t i=0; i<entries; i++) {
926 AliESDtrack *esdtrack = esd->GetTrack(i);
927 UInt_t status = esdtrack->GetStatus();
929 // require refit in ITS
930 if(fITSrefit && !(status&AliESDtrack::kITSrefit)) {
931 if(fDebug) printf("track %d is not kITSrefit\n",i);
935 // require minimum # of ITS points
936 if(esdtrack->GetNcls(0)<fMinITSCls) {
937 if(fDebug) printf("track %d has %d ITS cls\n",i,esdtrack->GetNcls(0));
940 // require points on the 2 pixel layers
942 if(!TESTBIT(esdtrack->GetITSClusterMap(),0) ||
943 !TESTBIT(esdtrack->GetITSClusterMap(),1)) continue;
945 // single track selection
946 if(!SingleTrkCuts(*esdtrack)) continue;
948 if(esdtrack->GetSign()<0) { // negative track
949 trksN.AddLast(esdtrack);
951 } else { // positive track
952 trksP.AddLast(esdtrack);
956 } // loop on ESD tracks
960 //-----------------------------------------------------------------------------
961 void AliAnalysisVertexingHF::SetD0toKpiCuts(Double_t cut0,Double_t cut1,
962 Double_t cut2,Double_t cut3,Double_t cut4,
963 Double_t cut5,Double_t cut6,
964 Double_t cut7,Double_t cut8)
966 // Set the cuts for D0 selection
967 fD0toKpiCuts[0] = cut0;
968 fD0toKpiCuts[1] = cut1;
969 fD0toKpiCuts[2] = cut2;
970 fD0toKpiCuts[3] = cut3;
971 fD0toKpiCuts[4] = cut4;
972 fD0toKpiCuts[5] = cut5;
973 fD0toKpiCuts[6] = cut6;
974 fD0toKpiCuts[7] = cut7;
975 fD0toKpiCuts[8] = cut8;
979 //-----------------------------------------------------------------------------
980 void AliAnalysisVertexingHF::SetD0toKpiCuts(const Double_t cuts[9])
982 // Set the cuts for D0 selection
984 for(Int_t i=0; i<9; i++) fD0toKpiCuts[i] = cuts[i];
988 //-----------------------------------------------------------------------------
989 void AliAnalysisVertexingHF::SetBtoJPSICuts(Double_t cut0,Double_t cut1,
990 Double_t cut2,Double_t cut3,Double_t cut4,
991 Double_t cut5,Double_t cut6,
992 Double_t cut7,Double_t cut8)
994 // Set the cuts for J/psi from B selection
995 fBtoJPSICuts[0] = cut0;
996 fBtoJPSICuts[1] = cut1;
997 fBtoJPSICuts[2] = cut2;
998 fBtoJPSICuts[3] = cut3;
999 fBtoJPSICuts[4] = cut4;
1000 fBtoJPSICuts[5] = cut5;
1001 fBtoJPSICuts[6] = cut6;
1002 fBtoJPSICuts[7] = cut7;
1003 fBtoJPSICuts[8] = cut8;
1007 //-----------------------------------------------------------------------------
1008 void AliAnalysisVertexingHF::SetBtoJPSICuts(const Double_t cuts[9])
1010 // Set the cuts for J/psi from B selection
1012 for(Int_t i=0; i<9; i++) fBtoJPSICuts[i] = cuts[i];
1016 //-----------------------------------------------------------------------------
1017 void AliAnalysisVertexingHF::SetDplusCuts(Double_t cut0,Double_t cut1,
1018 Double_t cut2,Double_t cut3,Double_t cut4,
1019 Double_t cut5,Double_t cut6,
1020 Double_t cut7,Double_t cut8,
1021 Double_t cut9,Double_t cut10,Double_t cut11)
1023 // Set the cuts for Dplus->Kpipi selection
1024 fDplusCuts[0] = cut0;
1025 fDplusCuts[1] = cut1;
1026 fDplusCuts[2] = cut2;
1027 fDplusCuts[3] = cut3;
1028 fDplusCuts[4] = cut4;
1029 fDplusCuts[5] = cut5;
1030 fDplusCuts[6] = cut6;
1031 fDplusCuts[7] = cut7;
1032 fDplusCuts[8] = cut8;
1033 fDplusCuts[9] = cut9;
1034 fDplusCuts[10] = cut10;
1035 fDplusCuts[11] = cut11;
1039 //-----------------------------------------------------------------------------
1040 void AliAnalysisVertexingHF::SetDplusCuts(const Double_t cuts[12])
1042 // Set the cuts for Dplus->Kpipi selection
1044 for(Int_t i=0; i<12; i++) fDplusCuts[i] = cuts[i];
1048 //-----------------------------------------------------------------------------
1049 void AliAnalysisVertexingHF::SetDsCuts(Double_t cut0)
1051 // Set the cuts for Ds->KKpi selection
1056 //-----------------------------------------------------------------------------
1057 void AliAnalysisVertexingHF::SetDsCuts(const Double_t cuts[1])
1059 // Set the cuts for Ds->KKpi selection
1061 for(Int_t i=0; i<1; i++) fDsCuts[i] = cuts[i];
1065 //-----------------------------------------------------------------------------
1066 void AliAnalysisVertexingHF::SetLcCuts(Double_t cut0)
1068 // Set the cuts for Lc->pKpi selection
1073 //-----------------------------------------------------------------------------
1074 void AliAnalysisVertexingHF::SetLcCuts(const Double_t cuts[1])
1076 // Set the cuts for Lc->pKpi selection
1078 for(Int_t i=0; i<1; i++) fLcCuts[i] = cuts[i];
1082 //-----------------------------------------------------------------------------
1083 Bool_t AliAnalysisVertexingHF::SingleTrkCuts(AliESDtrack& trk) const
1085 // Check if track passes some kinematical cuts
1087 if(TMath::Abs(1./trk.GetParameter()[4]) < fMinPtCut) {
1088 printf("pt %f\n",1./trk.GetParameter()[4]);
1091 trk.RelateToVertex(fV1,fBzkG,10.);
1092 Float_t d0z0[2],covd0z0[3];
1093 trk.GetImpactParameters(d0z0,covd0z0);
1094 if(TMath::Abs(d0z0[0]) < fMind0rphiCut) {
1095 printf("d0rphi %f\n",TMath::Abs(d0z0[0]));
1101 //-----------------------------------------------------------------------------
1102 AliESDVertex* AliAnalysisVertexingHF::ReconstructSecondaryVertex(TObjArray *trkArray) const
1104 // Secondary vertex reconstruction with AliVertexerTracks or AliKFParticle
1106 AliESDVertex *vertex = 0;
1108 if(!fSecVtxWithKF) { // AliVertexerTracks
1110 AliVertexerTracks *vertexer2 = new AliVertexerTracks(fBzkG);
1111 vertexer2->SetDebug(0);
1112 vertexer2->SetVtxStart(fV1);
1113 vertex = (AliESDVertex*)vertexer2->VertexForSelectedTracks(trkArray);
1116 } else { // Kalman Filter vertexer (AliKFParticle)
1118 AliKFParticle::SetField(fBzkG);
1120 AliKFParticle vertexKF;
1122 Int_t nTrks = trkArray->GetEntriesFast();
1123 for(Int_t i=0; i<nTrks; i++) {
1124 AliESDtrack *esdTrack = (AliESDtrack*)trkArray->At(i);
1125 AliKFParticle daughterKF(*esdTrack,211);
1126 vertexKF.AddDaughter(daughterKF);
1128 vertex = new AliESDVertex();
1129 vertexKF.CopyToESDVertex(*vertex);
1135 //-----------------------------------------------------------------------------