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a65a7e70 1/**************************************************************************
2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15/* $Id$ */
16
17//-------------------------------------------------------------------------
18// Implementation of the on-the-fly v0 finder for ITS tracker MI
19// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
20// Extraction from AliITStrackerMI: Andrea Dainese
21// Current support and development:
22//-------------------------------------------------------------------------
23
24#include <TMatrixD.h>
25#include <TTree.h>
26#include <TString.h>
27#include <TRandom.h>
28#include <TTreeStream.h>
29
30
31#include "AliLog.h"
32#include "AliESDVertex.h"
33#include "AliESDEvent.h"
34#include "AliESDtrack.h"
35#include "AliESDV0Params.h"
36#include "AliV0.h"
37#include "AliHelix.h"
38#include "AliITSRecPoint.h"
39#include "AliITSReconstructor.h"
40#include "AliITStrackerMI.h"
41#include "AliITSV0Finder.h"
42#include "AliKFParticle.h"
43#include "AliKFVertex.h"
44
45ClassImp(AliITSV0Finder)
46
47
48AliITSV0Finder::AliITSV0Finder():
49fDebugStreamer(0)
50 {
51 //Default constructor
52
53 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0)
54 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
55}
56
57//------------------------------------------------------------------------
58void AliITSV0Finder::UpdateTPCV0(const AliESDEvent *event,
59 AliITStrackerMI *tracker)
60{
61 //
62 //try to update, or reject TPC V0s
63 //
64 const Float_t kMinTgl2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl2();
65
66 TObjArray *trackHypothesys = tracker->GetTrackHypothesys();
67
68 Int_t nv0s = event->GetNumberOfV0s();
69 Int_t nitstracks = trackHypothesys->GetEntriesFast();
70
71 for (Int_t i=0;i<nv0s;i++){
72 AliESDv0 * vertex = event->GetV0(i);
73 Int_t ip = vertex->GetIndex(0);
74 Int_t im = vertex->GetIndex(1);
75 //
76 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)trackHypothesys->At(ip):0;
77 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)trackHypothesys->At(im):0;
78 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
79 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
80 //
81 //
82 if (trackp){
83 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
84 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
85 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
86 }
87 }
88
89 if (trackm){
90 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
91 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
92 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
93 }
94 }
95 if (vertex->GetStatus()==-100) continue;
96 //
97 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
98 Int_t clayer = tracker->GetNearestLayer(xrp); //I.B.
99 vertex->SetNBefore(clayer); //
100 vertex->SetChi2Before(9*clayer); //
101 vertex->SetNAfter(6-clayer); //
102 vertex->SetChi2After(0); //
103 //
104 if (clayer >1 ){ // calculate chi2 before vertex
105 Float_t chi2p = 0, chi2m=0;
106 //
107 if (trackp){
108 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
109 if (trackp->GetClIndex(ilayer)>=0){
110 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
111 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
112 }
113 else{
114 chi2p+=9;
115 }
116 }
117 }else{
118 chi2p = 9*clayer;
119 }
120 //
121 if (trackm){
122 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
123 if (trackm->GetClIndex(ilayer)>=0){
124 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
125 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
126 }
127 else{
128 chi2m+=9;
129 }
130 }
131 }else{
132 chi2m = 9*clayer;
133 }
134 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
135 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
136 }
137
138 if (clayer < 5 ){ // calculate chi2 after vertex
139 Float_t chi2p = 0, chi2m=0;
140 //
141 if (trackp&&TMath::Abs(trackp->GetTgl())<kMinTgl2){
142 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
143 if (trackp->GetClIndex(ilayer)>=0){
144 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
145 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
146 }
147 else{
148 chi2p+=9;
149 }
150 }
151 }else{
152 chi2p = 0;
153 }
154 //
155 if (trackm&&TMath::Abs(trackm->GetTgl())<kMinTgl2){
156 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
157 if (trackm->GetClIndex(ilayer)>=0){
158 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
159 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
160 }
161 else{
162 chi2m+=9;
163 }
164 }
165 }else{
166 chi2m = 0;
167 }
168 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
169 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
170 }
171 }
172 //
173}
174//------------------------------------------------------------------------
175void AliITSV0Finder::FindV02(AliESDEvent *event,
176 AliITStrackerMI *tracker)
177{
178 //
179 // V0 finder
180 //
181 // Cuts on DCA - R dependent
182 // max distance DCA between 2 tracks cut
183 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
184 //
185 const Bool_t kCheckPropagate = kFALSE;
186 const Float_t kMaxDist0 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist0();
187 const Float_t kMaxDist1 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist1();
188 const Float_t kMaxDist = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist();
189 const Float_t kMinPointAngle = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle();
190 const Float_t kMinPointAngle2 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle2();
191 const Float_t kMinR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinR();
192 const Float_t kMaxR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxR();
193 const Float_t kMinPABestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPABestConst();
194 const Float_t kMaxRBestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRBestConst();
195 const Float_t kCausality0Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCausality0Cut();
196 const Float_t kLikelihood01Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood01Cut();
197 const Float_t kLikelihood1Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood1Cut();
198 const Float_t kCombinedCut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCombinedCut();
199 const Float_t kMinClFullTrk= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClFullTrk();
200 const Float_t kMinTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl0();
201 const Float_t kMinRTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTgl0();
202
203 const Float_t kMinNormDistForbTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbTgl0();
204 const Float_t kMinClForb0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClForb0();
205 const Float_t kMinNormDistForb1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb1();
206 const Float_t kMinNormDistForb2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb2();
207 const Float_t kMinNormDistForb3= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb3();
208 const Float_t kMinNormDistForb4= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb4();
209 const Float_t kMinNormDistForb5= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb5();
210 const Float_t kMinNormDistForbProt= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbProt();
211 const Float_t kMaxPidProbPionForb= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxPidProbPionForb();
212
213 const Float_t kMinRTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTPCdensity();
214 const Float_t kMaxRTPCdensity0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity0();
215 const Float_t kMaxRTPCdensity10= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity10();
216 const Float_t kMaxRTPCdensity20= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity20();
217 const Float_t kMaxRTPCdensity30= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity30();
218
219
220 const Float_t kMinTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTPCdensity();
221 const Float_t kMinTgl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl1();
222
223 const Float_t kMinchi2before0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before0();
224 const Float_t kMinchi2before1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before1();
225 const Float_t kMinchi2after0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after0();
226 const Float_t kMinchi2after1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after1();
227 const Float_t kAddchi2SharedCl= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2SharedCl();
228 const Float_t kAddchi2NegCl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl0();
229 const Float_t kAddchi2NegCl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl1();
230
231 const Float_t kSigp0Par0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par0();
232 const Float_t kSigp0Par1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par1();
233 const Float_t kSigp0Par2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par2();
234
235 const Float_t kSigpPar0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar0();
236 const Float_t kSigpPar1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar1();
237 const Float_t kSigpPar2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar2();
238 const Float_t kMaxDcaLh0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDcaLh0();
239
240
241 TObjArray *trackHypothesys = tracker->GetTrackHypothesys();
242 TObjArray *bestHypothesys = tracker->GetBestHypothesys();
243 TObjArray *originalTracks = tracker->GetOriginal();
244 //
245 //
246 TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());
247 Int_t ntracks = event->GetNumberOfTracks();
248 Int_t nitstracks = originalTracks->GetEntriesFast();
249 originalTracks->Expand(ntracks);
250 trackHypothesys->Expand(ntracks);
251 bestHypothesys->Expand(ntracks);
252 //
253 AliHelix * helixes = new AliHelix[ntracks+2];
254 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
255 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
256 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
257 //Change from Bool_t to Int_t for optimization
258 // Int_t forbN=0;
259 // Int_t * forbidden = new Int_t [ntracks+2];
260 Bool_t * forbidden = new Bool_t [ntracks+2];
261 Int_t *itsmap = new Int_t [ntracks+2];
262 Float_t *dist = new Float_t[ntracks+2];
263 Float_t *normdist0 = new Float_t[ntracks+2];
264 Float_t *normdist1 = new Float_t[ntracks+2];
265 Float_t *normdist = new Float_t[ntracks+2];
266 Float_t *norm = new Float_t[ntracks+2];
267 Float_t *maxr = new Float_t[ntracks+2];
268 Float_t *minr = new Float_t[ntracks+2];
269 Float_t *minPointAngle= new Float_t[ntracks+2];
270 //
271 AliV0 *pvertex = new AliV0;
272 AliITStrackMI * dummy= new AliITStrackMI;
273 dummy->SetLabel(0);
274 AliITStrackMI trackat0; //temporary track for DCA calculation
275 //
2942f542 276 Float_t primvertex[3]={static_cast<Float_t>(tracker->GetX()),static_cast<Float_t>(tracker->GetY()),static_cast<Float_t>(tracker->GetZ())};
a65a7e70 277 //
278 // make ITS - ESD map
279 //
280 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
281 itsmap[itrack] = -1;
282 // forbidden[itrack] = 0;
283 forbidden[itrack] = kFALSE;
284 maxr[itrack] = kMaxR;
285 minr[itrack] = kMinR;
286 minPointAngle[itrack] = kMinPointAngle;
287 }
288 for (Int_t itrack=0;itrack<nitstracks;itrack++){
289 AliITStrackMI * original = (AliITStrackMI*)(originalTracks->At(itrack));
290 Int_t esdindex = original->GetESDtrack()->GetID();
291 itsmap[esdindex] = itrack;
292 }
293 //
294 // create ITS tracks from ESD tracks if not done before
295 //
296 for (Int_t itrack=0;itrack<ntracks;itrack++){
297 if (itsmap[itrack]>=0) continue;
298 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
299 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
300 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
301 tpctrack->GetDZ(tracker->GetX(),tracker->GetY(),tracker->GetZ(),tpctrack->GetDP()); //I.B.
302 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
303 // tracks which can reach inner part of ITS
304 // propagate track to outer its volume - with correction for material
305 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(tpctrack);
306 }
307 itsmap[itrack] = nitstracks;
308 originalTracks->AddAt(tpctrack,nitstracks);
309 nitstracks++;
310 }
311 //
312 // fill temporary arrays
313 //
314 for (Int_t itrack=0;itrack<ntracks;itrack++){
315 AliESDtrack * esdtrack = event->GetTrack(itrack);
316 Int_t itsindex = itsmap[itrack];
317 AliITStrackMI *original = (AliITStrackMI*)originalTracks->At(itsmap[itrack]);
318 if (!original) continue;
319 AliITStrackMI *bestConst = 0;
320 AliITStrackMI *bestLong = 0;
321 AliITStrackMI *best = 0;
322 //
323 //
324 TObjArray * array = (TObjArray*) trackHypothesys->At(itsindex);
325 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
326 // Get best track with vertex constrain
327 for (Int_t ih=0;ih<hentries;ih++){
328 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
329 if (!trackh->GetConstrain()) continue;
330 if (!bestConst) bestConst = trackh;
331 if (trackh->GetNumberOfClusters()>kMinClFullTrk ){
332 bestConst = trackh; // full track - with minimal chi2
333 break;
334 }
335 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
336 bestConst = trackh;
337 break;
338 }
339 // Get best long track without vertex constrain and best track without vertex constrain
340 for (Int_t ih=0;ih<hentries;ih++){
341 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
342 if (trackh->GetConstrain()) continue;
343 if (!best) best = trackh;
344 if (!bestLong) bestLong = trackh;
345 if (trackh->GetNumberOfClusters()>kMinClFullTrk){
346 bestLong = trackh; // full track - with minimal chi2
347 break;
348 }
349 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
350 bestLong = trackh;
351 }
352 if (!best) {
353 best = original;
354 bestLong = original;
355 }
356 //I.B. trackat0 = *bestLong;
357 new (&trackat0) AliITStrackMI(*bestLong);
358 Double_t xx,yy,zz,alpha;
359 if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;
360
361
362 alpha = TMath::ATan2(yy,xx);
363 // if (!trackat0.Propagate(alpha,0)) continue;
364 // trackat0.Propagate(alpha,0); //PH The check on the return value is temporarily disabled (bug 45751)
365 if(!trackat0.Propagate(alpha,0) && kCheckPropagate)continue;
366 // calculate normalized distances to the vertex
367 //
368 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
369 if ( bestLong->GetNumberOfClusters()>3 ){
370 dist[itsindex] = trackat0.GetY();
371 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
372 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
373 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
374 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
375 if (!bestConst){
376 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
377 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
378 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
379 }else{
380 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
381 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
382 }
383 }
384 else{
385 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
386 dist[itsindex] = bestConst->GetD(0);
387 norm[itsindex] = bestConst->GetDnorm(0);
388 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
389 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
390 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
391 }else{
392 dist[itsindex] = trackat0.GetY();
393 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
394 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
395 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
396 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
397 if (TMath::Abs(trackat0.GetTgl())>kMinTgl0){
398 if (normdist[itsindex]<kMinNormDistForbTgl0){
399 // forbN=1;
400 // forbidden[itsindex]+=1<<forbN;
401 forbidden[itsindex]=kTRUE;
402 }
403 if (normdist[itsindex]>kMinNormDistForbTgl0) {
404 minr[itsindex] = TMath::Max(kMinRTgl0,minr[itsindex]);
405 }
406 }
407 }
408 }
409
410
411 //
412 //-----------------------------------------------------------
413 //Forbid primary track candidates -
414 //
415 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
416 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
417 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
418 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
419 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
420 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
421 //-----------------------------------------------------------
422 if (bestConst){
423 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>kMinClForb0){
424 // forbN=2;
425 // forbidden[itsindex]+=1<<forbN;
426 forbidden[itsindex]=kTRUE;
427 }
428 if (normdist[itsindex]<kMinNormDistForb1 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5){
429 // forbN=3;
430 // forbidden[itsindex]+=1<<forbN;
431 forbidden[itsindex]=kTRUE;
432 }
433 if (normdist[itsindex]<kMinNormDistForb2 && bestConst->GetClIndex(0)>=0 && bestConst->GetClIndex(1)>=0 ){
434 // forbN=4;
435 // forbidden[itsindex]+=1<<forbN;
436 forbidden[itsindex]=kTRUE;
437 }
438 if (normdist[itsindex]<kMinNormDistForb3 && bestConst->GetClIndex(0)>=0){
439 // forbN=5;
440 // forbidden[itsindex]+=1<<forbN;
441 forbidden[itsindex]=kTRUE;
442 }
443 if (normdist[itsindex]<kMinNormDistForb4 && bestConst->GetNormChi2(0)<2){
444 // forbN=6;
445 // forbidden[itsindex]+=1<<forbN;
446 forbidden[itsindex]=kTRUE;
447 }
448 if (normdist[itsindex]<kMinNormDistForb5 && bestConst->GetNormChi2(0)<1){
449 // forbN=7;
450 // forbidden[itsindex]+=1<<forbN;
451 forbidden[itsindex]=kTRUE;
452 }
453 if (bestConst->GetNormChi2(0)<2.5) {
454 minPointAngle[itsindex]= kMinPABestConst;
455 maxr[itsindex] = kMaxRBestConst;
456 }
457 }
458 //
459 //forbid daughter kink candidates
460 //
461 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
462 Bool_t isElectron = kTRUE;
463 Bool_t isProton = kTRUE;
464 Double_t pid[5];
465 esdtrack->GetESDpid(pid);
466 for (Int_t i=1;i<5;i++){
467 if (pid[0]<pid[i]) isElectron= kFALSE;
468 if (pid[4]<pid[i]) isProton= kFALSE;
469 }
470 if (isElectron){
471 forbidden[itsindex]=kFALSE;
472 normdist[itsindex]*=-1;
473 }
474 if (isProton){
475 if (normdist[itsindex]>kMinNormDistForbProt) forbidden[itsindex]=kFALSE;
476 normdist[itsindex]*=-1;
477 }
478
479 // We allow all tracks that are not pions
480 if( (pid[1]+pid[2])< kMaxPidProbPionForb ){
481 forbidden[itsindex]=kFALSE;
482 }
483
484 //
485 // Causality cuts in TPC volume
486 //
487 if (esdtrack->GetTPCdensity(0,10) >kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity0),maxr[itsindex]);
488 if (esdtrack->GetTPCdensity(10,30)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity10),maxr[itsindex]);
489 if (esdtrack->GetTPCdensity(20,40)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity20),maxr[itsindex]);
490 if (esdtrack->GetTPCdensity(30,50)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity30),maxr[itsindex]);
491 //
492 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=kMinRTPCdensity;
493 //
494 //
495
496 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){
497 cstream<<"Track"<<
498 "Tr0.="<<best<<
499 "Tr1.="<<((bestConst)? bestConst:dummy)<<
500 "Tr2.="<<bestLong<<
501 "Tr3.="<<&trackat0<<
502 "Esd.="<<esdtrack<<
503 "Dist="<<dist[itsindex]<<
504 "ND0="<<normdist0[itsindex]<<
505 "ND1="<<normdist1[itsindex]<<
506 "ND="<<normdist[itsindex]<<
507 "Pz="<<primvertex[2]<<
508 "Forbid="<<forbidden[itsindex]<<
509 "\n";
510 //
511 }
512 trackarray.AddAt(best,itsindex);
513 trackarrayc.AddAt(bestConst,itsindex);
514 trackarrayl.AddAt(bestLong,itsindex);
515 new (&helixes[itsindex]) AliHelix(*best);
516 }
517 //
518 //
519 //
520 // first iterration of V0 finder
521 //
522 // AM Comment out for optimization
523 // Int_t rejectBase=0;
524 // Int_t cutN=0;
525
526 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
527 Int_t itrack0 = itsmap[iesd0];
528 //-AM comment for optimization and store the forbidden value in the debug streamer
529 if (forbidden[itrack0]) continue;
530 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
531 if (!btrack0) continue;
532 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
533 //
534 for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){
535 Int_t itrack1 = itsmap[iesd1];
536 //-AM comment for optimization and store the forbidden value in the debug streamer
537 if (forbidden[itrack1]) continue;
538
539 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
540 if (!btrack1) continue;
541
542 if ( (btrack0->GetSign()==btrack1->GetSign()) && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;
543
544 Bool_t isGold = kFALSE;
545 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
546 isGold = kTRUE;
547 }
548 // rejectBase=0;
549 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
550 AliHelix &h1 = helixes[itrack0];
551 AliHelix &h2 = helixes[itrack1];
552 //
553 // find linear distance
554 Double_t rmin =0;
555 //
556 //
557 //
558 Double_t phase[2][2]={{0.,0.},{0.,0.}};
559 Double_t radius[2]={0.,0.};
560 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
561 if (points==0) {
562 // cutN=1;
563 // rejectBase+=1<<cutN;
564 continue;
565 }
566 Double_t delta[2]={1000000,1000000};
567 rmin = radius[0];
568 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
569 if (points==2){
570 if (radius[1]<rmin) rmin = radius[1];
571 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
572 }
573 rmin = TMath::Sqrt(rmin);
574 Double_t distance = 0;
575 Double_t radiusC = 0;
576 Int_t iphase = 0;
577 if (points==1 || delta[0]<delta[1]){
578 distance = TMath::Sqrt(delta[0]);
579 radiusC = TMath::Sqrt(radius[0]);
580 }else{
581 distance = TMath::Sqrt(delta[1]);
582 radiusC = TMath::Sqrt(radius[1]);
583 iphase=1;
584 }
585 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])){
586 // cutN=2;
587 //rejectBase+=1<<cutN;
588 continue;
589 }
590 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])){
591 // cutN=3;
592 // rejectBase+=1<<cutN;
593 continue;
594 }
595 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
596 if (distance>maxDist){
597 // cutN=4;
598 // rejectBase+=1<<cutN;
599 continue;
600 }
601 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
602 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) {
603 // cutN=5;
604 // rejectBase+=1<<cutN;
605 continue;
606 }
607 //
608 //
609 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
610 //
611 // if (distance>maxDist) continue;
612 // if (pvertex->GetRr()<kMinR) continue;
613 // if (pvertex->GetRr()>kMaxR) continue;
614 AliITStrackMI * track0=btrack0;
615 AliITStrackMI * track1=btrack1;
616 // if (pvertex->GetRr()<3.5){
617 if (radiusC<3.5){
618 //use longest tracks inside the pipe
619 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
620 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
621 }
622 //
623 //
624
625
626
627 pvertex->SetParamN(*track0);
628 pvertex->SetParamP(*track1);
629 pvertex->Update(primvertex);
630 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
631
632 // Define gamma, K0, lambda and lambda_bar from the decay particles and calculate the chi2
633 AliKFVertex vertexKF;
634
635 vertexKF.X() = tracker->GetX();
636 vertexKF.Y() = tracker->GetY();
637 vertexKF.Z() = tracker->GetZ();
638 vertexKF.Covariance(0,0) = tracker->GetSigmaX()*tracker->GetSigmaX();
639 vertexKF.Covariance(1,2) = tracker->GetSigmaY()*tracker->GetSigmaY();
640 vertexKF.Covariance(2,2) = tracker->GetSigmaZ()*tracker->GetSigmaZ();
641
642 AliKFParticle elecKF( *(pvertex->GetParamN()) ,11);
643 AliKFParticle posiKF( *(pvertex->GetParamP()) ,-11);
644 AliKFParticle pipKF( *(pvertex->GetParamN()) , 211);
645 AliKFParticle pinKF( *(pvertex->GetParamP()) ,-211);
646 AliKFParticle protKF( *(pvertex->GetParamP()) ,2212);
647 AliKFParticle aproKF ( *(pvertex->GetParamN()) ,-2212);
648
649
650 // Gamma
651 AliKFParticle gamKF(elecKF,posiKF);
652 gamKF.SetProductionVertex(vertexKF);
653
654 Float_t gamKFchi2 = 1000;
655 if ( gamKF.GetNDF()!=0 ){
656 gamKFchi2 = gamKF.GetChi2()/gamKF.GetNDF();
657 }
658
659 Float_t massG=0.;
660 Float_t sigmaMG=0.001;
661 gamKF.SetMassConstraint(massG,sigmaMG);
662
663 Float_t gamKFchi2C = 1000;
664 if ( gamKF.GetNDF()!=0 ){
665 gamKFchi2C = gamKF.GetChi2()/gamKF.GetNDF();
666 }
667
668 //K0 short
669 AliKFParticle k0KF(pipKF,pinKF);
670 k0KF.SetProductionVertex(vertexKF);
671
672 Float_t k0KFchi2 = 1000;
673 if ( k0KF.GetNDF()!=0 ){
674 k0KFchi2 = k0KF.GetChi2()/k0KF.GetNDF();
675 }
676
677 //Lambda
678 AliKFParticle lambdaKF(protKF,pinKF);
679 lambdaKF.SetProductionVertex(vertexKF);
680
681 Float_t lambdaKFchi2 = 1000;
682 if ( lambdaKF.GetNDF()!=0 ){
683 lambdaKFchi2 = lambdaKF.GetChi2()/lambdaKF.GetNDF();
684 }
685
686 //Lambda_bar
687 AliKFParticle alambKF(aproKF,pipKF);
688 alambKF.SetProductionVertex(vertexKF);
689
690 Float_t alambKFchi2 = 1000;
691 if ( alambKF.GetNDF()!=0 ){
692 alambKFchi2 = alambKF.GetChi2()/alambKF.GetNDF();
693 }
694
695
696
697
698
699 if (pvertex->GetRr()<kMinR){
700 // cutN=6;
701 // rejectBase+=1<<cutN;
702 continue;
703 }
704 if (pvertex->GetRr()>kMaxR){
705 // cutN=7;
706 // rejectBase+=1<<cutN;
707 continue;
708 }
709 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle){
710 // cutN=8;
711 // rejectBase+=1<<cutN;
712 continue;
713 }
714//Bo: if (pvertex->GetDist2()>maxDist) continue;
715
716 if (pvertex->GetDcaV0Daughters()>maxDist){
717 // cutN=9;
718 // rejectBase+=1<<cutN;
719 continue;
720 }
721//Bo: pvertex->SetLab(0,track0->GetLabel());
722//Bo: pvertex->SetLab(1,track1->GetLabel());
723 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
724 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
725 //
726 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
727 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
728
729 //
730 //
731 TObjArray * array0b = (TObjArray*)bestHypothesys->At(itrack0);
732 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<kMinTgl1) {
733 tracker->SetCurrentEsdTrack(itrack0);
734 tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack0),itrack0, kFALSE);
735 }
736 TObjArray * array1b = (TObjArray*)bestHypothesys->At(itrack1);
737 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<kMinTgl1) {
738 tracker->SetCurrentEsdTrack(itrack1);
739 tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack1),itrack1, kFALSE);
740 }
741 //
742 AliITStrackMI * track0b = (AliITStrackMI*)originalTracks->At(itrack0);
743 AliITStrackMI * track1b = (AliITStrackMI*)originalTracks->At(itrack1);
744 AliITStrackMI * track0l = (AliITStrackMI*)originalTracks->At(itrack0);
745 AliITStrackMI * track1l = (AliITStrackMI*)originalTracks->At(itrack1);
746
747 Float_t minchi2before0=kMinchi2before0;
748 Float_t minchi2before1=kMinchi2before1;
749 Float_t minchi2after0 =kMinchi2after0;
750 Float_t minchi2after1 =kMinchi2after1;
751 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
752 Int_t maxLayer = tracker->GetNearestLayer(xrp); //I.B.
753
754 if (array0b) for (Int_t i=0;i<5;i++){
755 // best track after vertex
756 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
757 if (!btrack) continue;
758 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
759 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
760 if (btrack->GetX()<pvertex->GetRr()-2.) {
761 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
762 Float_t sumchi2= 0;
763 Float_t sumn = 0;
764 if (maxLayer<3){ // take prim vertex as additional measurement
765 if (normdist[itrack0]>0 && htrackc0){
766 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
767 }else{
768 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
769 }
770 sumn += 3-maxLayer;
771 }
772 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
773 sumn+=1.;
774 if (btrack->GetClIndex(ilayer)<0){
775 sumchi2+=kAddchi2NegCl0;
776 continue;
777 }else{
778 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
779 for (Int_t itrack=0;itrack<4;itrack++){
780 AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);
781 if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack0){
782 sumchi2+=kAddchi2SharedCl; //shared cluster
783 break;
784 }
785 }
786 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
787 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
788 }
789 }
790 sumchi2/=sumn;
791 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
792 }
793 continue; //safety space - Geo manager will give exact layer
794 }
795 track0b = btrack;
796 minchi2after0 = btrack->GetNormChi2(i);
797 break;
798 }
799 if (array1b) for (Int_t i=0;i<5;i++){
800 // best track after vertex
801 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
802 if (!btrack) continue;
803 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
804 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
805 if (btrack->GetX()<pvertex->GetRr()-2){
806 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
807 Float_t sumchi2= 0;
808 Float_t sumn = 0;
809 if (maxLayer<3){ // take prim vertex as additional measurement
810 if (normdist[itrack1]>0 && htrackc1){
811 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
812 }else{
813 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
814 }
815 sumn += 3-maxLayer;
816 }
817 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
818 sumn+=1.;
819 if (btrack->GetClIndex(ilayer)<0){
820 sumchi2+=kAddchi2NegCl1;
821 continue;
822 }else{
823 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
824 for (Int_t itrack=0;itrack<4;itrack++){
825 AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);
826 if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack1){
827 sumchi2+=kAddchi2SharedCl; //shared cluster
828 break;
829 }
830 }
831 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
832 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
833 }
834 }
835 sumchi2/=sumn;
836 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
837 }
838 continue; //safety space - Geo manager will give exact layer
839 }
840 track1b = btrack;
841 minchi2after1 = btrack->GetNormChi2(i);
842 break;
843 }
844 //
845 // position resolution - used for DCA cut
846 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
847 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
848 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
849 sigmad =TMath::Sqrt(sigmad)+0.04;
850 if (pvertex->GetRr()>50){
851 Double_t cov0[15],cov1[15];
852 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
853 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
854 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
855 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
856 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
857 sigmad =TMath::Sqrt(sigmad)+0.05;
858 }
859 //
860 AliV0 vertex2;
861 vertex2.SetParamN(*track0b);
862 vertex2.SetParamP(*track1b);
863 vertex2.Update(primvertex);
864 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
865 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
866 pvertex->SetParamN(*track0b);
867 pvertex->SetParamP(*track1b);
868 pvertex->Update(primvertex);
869 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
870 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
871 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
872 }
873 pvertex->SetDistSigma(sigmad);
874 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
875 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
876 //
877 // define likelihhod and causalities
878 //
879 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
880 if (maxLayer<1){
881 Float_t fnorm0 = normdist[itrack0];
882 if (fnorm0<0) fnorm0*=-3;
883 Float_t fnorm1 = normdist[itrack1];
884 if (fnorm1<0) fnorm1*=-3;
885 if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){
886 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
887 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
888 }
889 pvertex->SetChi2Before(normdist[itrack0]);
890 pvertex->SetChi2After(normdist[itrack1]);
891 pvertex->SetNAfter(0);
892 pvertex->SetNBefore(0);
893 }else{
894 pvertex->SetChi2Before(minchi2before0);
895 pvertex->SetChi2After(minchi2before1);
896 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
897 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
898 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
899 }
900 pvertex->SetNAfter(maxLayer);
901 pvertex->SetNBefore(maxLayer);
902 }
903 if (pvertex->GetRr()<90){
904 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
905 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
906 }
907 if (pvertex->GetRr()<20){
908 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
909 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
910 }
911 //
912 pvertex->SetCausality(pb0,pb1,pa0,pa1);
913 //
914 // Likelihood calculations - apply cuts
915 //
916
917 // AM - Comment out for optimization and store the v0OK value
918 // Int_t v0OK = 0;
919 // Int_t cutOKN=0;
920 Bool_t v0OK = kTRUE;
921
922
923 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
924 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
925 p12 = TMath::Sqrt(p12); // "mean" momenta
926
927 Float_t sigmap0 = kSigp0Par0+kSigp0Par1/(kSigp0Par2+pvertex->GetRr());
928 Float_t sigmap = kSigpPar0*sigmap0*(kSigpPar1+kSigpPar2*p12); // "resolution: of point angle - as a function of radius and momenta
929
930
931 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
932 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*
933 TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));
934 //
935 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
936 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
937 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<kMaxDcaLh0)*(lDistNorm<5);
938
939 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
940 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
941 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
942 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
943 //
944 if (causalityA<kCausality0Cut){
945 // cutOKN=1;
946 // v0OK += 1<<cutOKN;
947 v0OK = kFALSE;
948 }
949 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut){
950 // cutOKN=2;
951 // v0OK += 1<<cutOKN;
952 v0OK = kFALSE;
953 }
954 if (likelihood1<kLikelihood1Cut){
955 // cutOKN=3;
956 // v0OK += 1<<cutOKN;
957 v0OK = kFALSE;
958 }
959 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut){
960 // cutOKN=4;
961 // v0OK += 1<<cutOKN;
962 v0OK = kFALSE;
963 }
964 //
965 //
966 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){
967 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
968 cstream<<"It0"<<
969 "Tr0.="<<track0<< //best without constrain
970 "Tr1.="<<track1<< //best without constrain
971 "posiKF.="<<&posiKF<< //KF from track0
972 "elecKF.="<<&elecKF<< //KF from track1
973 "Tr0B.="<<track0b<< //best without constrain after vertex
974 "Tr1B.="<<track1b<< //best without constrain after vertex
975 "Tr0C.="<<htrackc0<< //best with constrain if exist
976 "Tr1C.="<<htrackc1<< //best with constrain if exist
977 "Tr0L.="<<track0l<< //longest best
978 "Tr1L.="<<track1l<< //longest best
979 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
980 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
981 "V0.="<<pvertex<< //vertex properties
982 "V0b.="<<&vertex2<< //vertex properties at "best" track
983 "gamKF.="<<&gamKF<< //KF from pvertex
984 "k0KF.="<<&k0KF<< //KF from pvertex
985 "lambdaKF.="<<&lambdaKF<< //KF from pvertex
986 "alambKF.="<<&lambdaKF<< //KF from pvertex
987 "gamKFchi2="<<gamKFchi2<< //Normalized chi2 from KF assuming gamma momther
988 "gamKFchi2C="<<gamKFchi2C<< //Normalized chi2 from KF assuming gamma mother+mass constraint
989 "k0KFchi2="<<k0KFchi2<< //Normalized chi2 from KF assuming K0 mother
990 "lambdaKFchi2="<<lambdaKFchi2<< //Normalized chi2 from KF assuming Lambda mother
991 "alambKFchi2="<<alambKFchi2<< //Normalized chi2 from KF assuming lambda_bar mother
992 "ND0="<<normdist[itrack0]<< //normalize distance for track0
993 "ND1="<<normdist[itrack1]<< //normalize distance for track1
994 "Gold="<<gold<< //
995 // "RejectBase="<<rejectBase<< //rejection in First itteration
996 "OK="<<v0OK<<
997 "rmin="<<rmin<<
998 "sigmad="<<sigmad<<
999 "Forbid0="<<forbidden[itrack0]<<
1000 "Forbid1="<<forbidden[itrack1]<<
1001 "\n";
1002 }
1003 // if (rejectBase>0) continue;
1004 //if (forbidden[itrack0]>0 ||forbidden[itrack1]>0) continue;
1005 //
1006 pvertex->SetStatus(0);
1007 // if (rejectBase) {
1008 // pvertex->SetStatus(-100);
1009 //}
1010 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
1011 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
1012 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
1013 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
1014 // if (v0OK==0){
1015 if (v0OK){
1016 // AliV0vertex vertexjuri(*track0,*track1);
1017 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
1018 // event->AddV0(&vertexjuri);
1019 pvertex->SetStatus(100);
1020 }
1021 pvertex->SetOnFlyStatus(kTRUE);
1022 pvertex->ChangeMassHypothesis(kK0Short);
1023 event->AddV0(pvertex);
1024 }
1025 }
1026 }
1027 //
1028 //
1029 // delete temporary arrays
1030 //
1031 delete[] forbidden;
1032 delete[] minPointAngle;
1033 delete[] maxr;
1034 delete[] minr;
1035 delete[] norm;
1036 delete[] normdist;
1037 delete[] normdist1;
1038 delete[] normdist0;
1039 delete[] dist;
1040 delete[] itsmap;
1041 delete[] helixes;
1042 delete pvertex;
1043 delete dummy;
1044}
1045//------------------------------------------------------------------------
1046void AliITSV0Finder::RefitV02(const AliESDEvent *event,
1047 AliITStrackerMI *tracker)
1048{
1049 //
1050 //try to refit V0s in the third path of the reconstruction
1051 //
1052 TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());
1053 //
1054 Int_t nv0s = event->GetNumberOfV0s();
2942f542 1055 Float_t primvertex[3]={static_cast<Float_t>(tracker->GetX()),static_cast<Float_t>(tracker->GetY()),static_cast<Float_t>(tracker->GetZ())};
a65a7e70 1056 AliV0 v0temp;
1057 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
1058 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
1059 if (!v0mi) continue;
1060 Int_t itrack0 = v0mi->GetIndex(0);
1061 Int_t itrack1 = v0mi->GetIndex(1);
1062 AliESDtrack *esd0 = event->GetTrack(itrack0);
1063 AliESDtrack *esd1 = event->GetTrack(itrack1);
1064 if (!esd0||!esd1) continue;
1065 AliITStrackMI tpc0(*esd0);
1066 AliITStrackMI tpc1(*esd1);
1067 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
1068 Double_t alpha =TMath::ATan2(y,x); //I.B.
1069 if (v0mi->GetRr()>85){
1070 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
1071 v0temp.SetParamN(tpc0);
1072 v0temp.SetParamP(tpc1);
1073 v0temp.Update(primvertex);
1074 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<
1075 "V0.="<<v0mi<<
1076 "V0refit.="<<&v0temp<<
1077 "Tr0.="<<&tpc0<<
1078 "Tr1.="<<&tpc1<<
1079 "\n";
1080 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
1081 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
1082 v0mi->SetParamN(tpc0);
1083 v0mi->SetParamP(tpc1);
1084 v0mi->Update(primvertex);
1085 }
1086 }
1087 continue;
1088 }
1089 if (v0mi->GetRr()>35){
1090 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
1091 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
1092 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
1093 v0temp.SetParamN(tpc0);
1094 v0temp.SetParamP(tpc1);
1095 v0temp.Update(primvertex);
1096 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<
1097 "V0.="<<v0mi<<
1098 "V0refit.="<<&v0temp<<
1099 "Tr0.="<<&tpc0<<
1100 "Tr1.="<<&tpc1<<
1101 "\n";
1102 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
1103 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
1104 v0mi->SetParamN(tpc0);
1105 v0mi->SetParamP(tpc1);
1106 v0mi->Update(primvertex);
1107 }
1108 }
1109 continue;
1110 }
1111 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
1112 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
1113 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
1114 if (tracker->RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) &&
1115 tracker->RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
1116 v0temp.SetParamN(tpc0);
1117 v0temp.SetParamP(tpc1);
1118 v0temp.Update(primvertex);
1119 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<
1120 "V0.="<<v0mi<<
1121 "V0refit.="<<&v0temp<<
1122 "Tr0.="<<&tpc0<<
1123 "Tr1.="<<&tpc1<<
1124 "\n";
1125 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
1126 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
1127 v0mi->SetParamN(tpc0);
1128 v0mi->SetParamP(tpc1);
1129 v0mi->Update(primvertex);
1130 }
1131 }
1132 }
1133}
1134//------------------------------------------------------------------------
1135
1136
1137AliITSV0Finder::~AliITSV0Finder()
1138{
1139 //
1140 //destructor
1141 //
1142 if (fDebugStreamer) {
1143 //fDebugStreamer->Close();
1144 delete fDebugStreamer;
1145 }
1146
1147}