1 /**************************************************************************
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2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
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4 * Author: The ALICE Off-line Project. *
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5 * Contributors are mentioned in the code where appropriate. *
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7 * Permission to use, copy, modify and distribute this software and its *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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9 * without fee, provided that the above copyright notice appears in all *
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10 * copies and that both the copyright notice and this permission notice *
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11 * appear in the supporting documentation. The authors make no claims *
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12 * about the suitability of this software for any purpose. It is *
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13 * provided "as is" without express or implied warranty. *
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14 **************************************************************************/
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17 //-------------------------------------------------------------------------
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18 // Implementation of the on-the-fly v0 finder for ITS tracker MI
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19 // Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
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20 // Extraction from AliITStrackerMI: Andrea Dainese
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21 // Current support and development:
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22 //-------------------------------------------------------------------------
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24 #include <TMatrixD.h>
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26 #include <TString.h>
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27 #include <TRandom.h>
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28 #include <TTreeStream.h>
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32 #include "AliESDVertex.h"
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33 #include "AliESDEvent.h"
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34 #include "AliESDtrack.h"
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35 #include "AliESDV0Params.h"
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37 #include "AliHelix.h"
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38 #include "AliITSRecPoint.h"
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39 #include "AliITSReconstructor.h"
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40 #include "AliITStrackerMI.h"
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41 #include "AliITSV0Finder.h"
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42 #include "AliKFParticle.h"
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43 #include "AliKFVertex.h"
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45 ClassImp(AliITSV0Finder)
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48 AliITSV0Finder::AliITSV0Finder():
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51 //Default constructor
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53 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0)
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54 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
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57 //------------------------------------------------------------------------
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58 void AliITSV0Finder::UpdateTPCV0(const AliESDEvent *event,
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59 AliITStrackerMI *tracker)
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62 //try to update, or reject TPC V0s
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64 const Float_t kMinTgl2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl2();
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66 TObjArray *trackHypothesys = tracker->GetTrackHypothesys();
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68 Int_t nv0s = event->GetNumberOfV0s();
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69 Int_t nitstracks = trackHypothesys->GetEntriesFast();
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71 for (Int_t i=0;i<nv0s;i++){
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72 AliESDv0 * vertex = event->GetV0(i);
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73 Int_t ip = vertex->GetIndex(0);
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74 Int_t im = vertex->GetIndex(1);
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76 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)trackHypothesys->At(ip):0;
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77 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)trackHypothesys->At(im):0;
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78 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
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79 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
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83 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
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84 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
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85 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
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90 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
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91 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
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92 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
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95 if (vertex->GetStatus()==-100) continue;
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97 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
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98 Int_t clayer = tracker->GetNearestLayer(xrp); //I.B.
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99 vertex->SetNBefore(clayer); //
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100 vertex->SetChi2Before(9*clayer); //
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101 vertex->SetNAfter(6-clayer); //
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102 vertex->SetChi2After(0); //
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104 if (clayer >1 ){ // calculate chi2 before vertex
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105 Float_t chi2p = 0, chi2m=0;
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108 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
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109 if (trackp->GetClIndex(ilayer)>=0){
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110 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
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111 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
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122 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
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123 if (trackm->GetClIndex(ilayer)>=0){
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124 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
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125 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
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134 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
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135 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
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138 if (clayer < 5 ){ // calculate chi2 after vertex
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139 Float_t chi2p = 0, chi2m=0;
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141 if (trackp&&TMath::Abs(trackp->GetTgl())<kMinTgl2){
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142 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
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143 if (trackp->GetClIndex(ilayer)>=0){
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144 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
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145 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
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155 if (trackm&&TMath::Abs(trackm->GetTgl())<kMinTgl2){
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156 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
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157 if (trackm->GetClIndex(ilayer)>=0){
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158 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
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159 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
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168 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
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169 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
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174 //------------------------------------------------------------------------
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175 void AliITSV0Finder::FindV02(AliESDEvent *event,
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176 AliITStrackerMI *tracker)
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181 // Cuts on DCA - R dependent
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182 // max distance DCA between 2 tracks cut
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183 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
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185 const Bool_t kCheckPropagate = kFALSE;
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186 const Float_t kMaxDist0 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist0();
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187 const Float_t kMaxDist1 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist1();
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188 const Float_t kMaxDist = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist();
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189 const Float_t kMinPointAngle = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle();
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190 const Float_t kMinPointAngle2 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle2();
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191 const Float_t kMinR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinR();
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192 const Float_t kMaxR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxR();
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193 const Float_t kMinPABestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPABestConst();
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194 const Float_t kMaxRBestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRBestConst();
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195 const Float_t kCausality0Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCausality0Cut();
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196 const Float_t kLikelihood01Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood01Cut();
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197 const Float_t kLikelihood1Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood1Cut();
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198 const Float_t kCombinedCut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCombinedCut();
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199 const Float_t kMinClFullTrk= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClFullTrk();
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200 const Float_t kMinTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl0();
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201 const Float_t kMinRTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTgl0();
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203 const Float_t kMinNormDistForbTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbTgl0();
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204 const Float_t kMinClForb0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClForb0();
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205 const Float_t kMinNormDistForb1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb1();
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206 const Float_t kMinNormDistForb2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb2();
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207 const Float_t kMinNormDistForb3= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb3();
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208 const Float_t kMinNormDistForb4= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb4();
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209 const Float_t kMinNormDistForb5= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb5();
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210 const Float_t kMinNormDistForbProt= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbProt();
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211 const Float_t kMaxPidProbPionForb= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxPidProbPionForb();
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213 const Float_t kMinRTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTPCdensity();
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214 const Float_t kMaxRTPCdensity0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity0();
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215 const Float_t kMaxRTPCdensity10= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity10();
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216 const Float_t kMaxRTPCdensity20= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity20();
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217 const Float_t kMaxRTPCdensity30= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity30();
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220 const Float_t kMinTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTPCdensity();
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221 const Float_t kMinTgl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl1();
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223 const Float_t kMinchi2before0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before0();
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224 const Float_t kMinchi2before1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before1();
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225 const Float_t kMinchi2after0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after0();
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226 const Float_t kMinchi2after1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after1();
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227 const Float_t kAddchi2SharedCl= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2SharedCl();
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228 const Float_t kAddchi2NegCl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl0();
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229 const Float_t kAddchi2NegCl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl1();
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231 const Float_t kSigp0Par0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par0();
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232 const Float_t kSigp0Par1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par1();
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233 const Float_t kSigp0Par2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par2();
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235 const Float_t kSigpPar0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar0();
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236 const Float_t kSigpPar1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar1();
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237 const Float_t kSigpPar2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar2();
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238 const Float_t kMaxDcaLh0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDcaLh0();
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241 TObjArray *trackHypothesys = tracker->GetTrackHypothesys();
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242 TObjArray *bestHypothesys = tracker->GetBestHypothesys();
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243 TObjArray *originalTracks = tracker->GetOriginal();
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246 TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());
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247 Int_t ntracks = event->GetNumberOfTracks();
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248 Int_t nitstracks = trackHypothesys->GetEntriesFast();
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249 originalTracks->Expand(ntracks);
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250 trackHypothesys->Expand(ntracks);
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251 bestHypothesys->Expand(ntracks);
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253 AliHelix * helixes = new AliHelix[ntracks+2];
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254 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
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255 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
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256 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
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257 //Change from Bool_t to Int_t for optimization
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259 // Int_t * forbidden = new Int_t [ntracks+2];
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260 Bool_t * forbidden = new Bool_t [ntracks+2];
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261 Int_t *itsmap = new Int_t [ntracks+2];
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262 Float_t *dist = new Float_t[ntracks+2];
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263 Float_t *normdist0 = new Float_t[ntracks+2];
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264 Float_t *normdist1 = new Float_t[ntracks+2];
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265 Float_t *normdist = new Float_t[ntracks+2];
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266 Float_t *norm = new Float_t[ntracks+2];
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267 Float_t *maxr = new Float_t[ntracks+2];
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268 Float_t *minr = new Float_t[ntracks+2];
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269 Float_t *minPointAngle= new Float_t[ntracks+2];
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271 AliV0 *pvertex = new AliV0;
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272 AliITStrackMI * dummy= new AliITStrackMI;
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273 dummy->SetLabel(0);
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274 AliITStrackMI trackat0; //temporary track for DCA calculation
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276 Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};
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278 // make ITS - ESD map
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280 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
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281 itsmap[itrack] = -1;
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282 // forbidden[itrack] = 0;
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283 forbidden[itrack] = kFALSE;
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284 maxr[itrack] = kMaxR;
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285 minr[itrack] = kMinR;
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286 minPointAngle[itrack] = kMinPointAngle;
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288 for (Int_t itrack=0;itrack<nitstracks;itrack++){
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289 AliITStrackMI * original = (AliITStrackMI*)(originalTracks->At(itrack));
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290 Int_t esdindex = original->GetESDtrack()->GetID();
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291 itsmap[esdindex] = itrack;
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294 // create ITS tracks from ESD tracks if not done before
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296 for (Int_t itrack=0;itrack<ntracks;itrack++){
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297 if (itsmap[itrack]>=0) continue;
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298 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
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299 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
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300 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
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301 tpctrack->GetDZ(tracker->GetX(),tracker->GetY(),tracker->GetZ(),tpctrack->GetDP()); //I.B.
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302 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
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303 // tracks which can reach inner part of ITS
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304 // propagate track to outer its volume - with correction for material
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305 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(tpctrack);
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307 itsmap[itrack] = nitstracks;
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308 originalTracks->AddAt(tpctrack,nitstracks);
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312 // fill temporary arrays
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314 for (Int_t itrack=0;itrack<ntracks;itrack++){
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315 AliESDtrack * esdtrack = event->GetTrack(itrack);
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316 Int_t itsindex = itsmap[itrack];
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317 AliITStrackMI *original = (AliITStrackMI*)originalTracks->At(itsmap[itrack]);
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318 if (!original) continue;
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319 AliITStrackMI *bestConst = 0;
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320 AliITStrackMI *bestLong = 0;
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321 AliITStrackMI *best = 0;
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324 TObjArray * array = (TObjArray*) trackHypothesys->At(itsindex);
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325 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
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326 // Get best track with vertex constrain
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327 for (Int_t ih=0;ih<hentries;ih++){
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328 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
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329 if (!trackh->GetConstrain()) continue;
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330 if (!bestConst) bestConst = trackh;
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331 if (trackh->GetNumberOfClusters()>kMinClFullTrk ){
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332 bestConst = trackh; // full track - with minimal chi2
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335 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
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336 bestConst = trackh;
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339 // Get best long track without vertex constrain and best track without vertex constrain
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340 for (Int_t ih=0;ih<hentries;ih++){
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341 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
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342 if (trackh->GetConstrain()) continue;
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343 if (!best) best = trackh;
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344 if (!bestLong) bestLong = trackh;
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345 if (trackh->GetNumberOfClusters()>kMinClFullTrk){
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346 bestLong = trackh; // full track - with minimal chi2
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349 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
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350 bestLong = trackh;
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354 bestLong = original;
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356 //I.B. trackat0 = *bestLong;
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357 new (&trackat0) AliITStrackMI(*bestLong);
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358 Double_t xx,yy,zz,alpha;
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359 if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;
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362 alpha = TMath::ATan2(yy,xx);
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363 // if (!trackat0.Propagate(alpha,0)) continue;
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364 // trackat0.Propagate(alpha,0); //PH The check on the return value is temporarily disabled (bug 45751)
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365 if(!trackat0.Propagate(alpha,0) && kCheckPropagate)continue;
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366 // calculate normalized distances to the vertex
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368 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
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369 if ( bestLong->GetNumberOfClusters()>3 ){
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370 dist[itsindex] = trackat0.GetY();
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371 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
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372 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
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373 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
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374 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
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376 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
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377 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
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378 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
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380 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
\r
381 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
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385 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
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386 dist[itsindex] = bestConst->GetD(0);
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387 norm[itsindex] = bestConst->GetDnorm(0);
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388 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
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389 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
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390 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
\r
392 dist[itsindex] = trackat0.GetY();
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393 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
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394 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
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395 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
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396 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
\r
397 if (TMath::Abs(trackat0.GetTgl())>kMinTgl0){
\r
398 if (normdist[itsindex]<kMinNormDistForbTgl0){
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400 // forbidden[itsindex]+=1<<forbN;
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401 forbidden[itsindex]=kTRUE;
\r
403 if (normdist[itsindex]>kMinNormDistForbTgl0) {
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404 minr[itsindex] = TMath::Max(kMinRTgl0,minr[itsindex]);
\r
412 //-----------------------------------------------------------
\r
413 //Forbid primary track candidates -
\r
415 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
\r
416 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
\r
417 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
\r
418 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
\r
419 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
\r
420 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
\r
421 //-----------------------------------------------------------
\r
423 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>kMinClForb0){
\r
425 // forbidden[itsindex]+=1<<forbN;
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426 forbidden[itsindex]=kTRUE;
\r
428 if (normdist[itsindex]<kMinNormDistForb1 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5){
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430 // forbidden[itsindex]+=1<<forbN;
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431 forbidden[itsindex]=kTRUE;
\r
433 if (normdist[itsindex]<kMinNormDistForb2 && bestConst->GetClIndex(0)>=0 && bestConst->GetClIndex(1)>=0 ){
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435 // forbidden[itsindex]+=1<<forbN;
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436 forbidden[itsindex]=kTRUE;
\r
438 if (normdist[itsindex]<kMinNormDistForb3 && bestConst->GetClIndex(0)>=0){
\r
440 // forbidden[itsindex]+=1<<forbN;
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441 forbidden[itsindex]=kTRUE;
\r
443 if (normdist[itsindex]<kMinNormDistForb4 && bestConst->GetNormChi2(0)<2){
\r
445 // forbidden[itsindex]+=1<<forbN;
\r
446 forbidden[itsindex]=kTRUE;
\r
448 if (normdist[itsindex]<kMinNormDistForb5 && bestConst->GetNormChi2(0)<1){
\r
450 // forbidden[itsindex]+=1<<forbN;
\r
451 forbidden[itsindex]=kTRUE;
\r
453 if (bestConst->GetNormChi2(0)<2.5) {
\r
454 minPointAngle[itsindex]= kMinPABestConst;
\r
455 maxr[itsindex] = kMaxRBestConst;
\r
459 //forbid daughter kink candidates
\r
461 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
\r
462 Bool_t isElectron = kTRUE;
\r
463 Bool_t isProton = kTRUE;
\r
465 esdtrack->GetESDpid(pid);
\r
466 for (Int_t i=1;i<5;i++){
\r
467 if (pid[0]<pid[i]) isElectron= kFALSE;
\r
468 if (pid[4]<pid[i]) isProton= kFALSE;
\r
471 forbidden[itsindex]=kFALSE;
\r
472 normdist[itsindex]*=-1;
\r
475 if (normdist[itsindex]>kMinNormDistForbProt) forbidden[itsindex]=kFALSE;
\r
476 normdist[itsindex]*=-1;
\r
479 // We allow all tracks that are not pions
\r
480 if( (pid[1]+pid[2])< kMaxPidProbPionForb ){
\r
481 forbidden[itsindex]=kFALSE;
\r
485 // Causality cuts in TPC volume
\r
487 if (esdtrack->GetTPCdensity(0,10) >kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity0),maxr[itsindex]);
\r
488 if (esdtrack->GetTPCdensity(10,30)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity10),maxr[itsindex]);
\r
489 if (esdtrack->GetTPCdensity(20,40)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity20),maxr[itsindex]);
\r
490 if (esdtrack->GetTPCdensity(30,50)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity30),maxr[itsindex]);
\r
492 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=kMinRTPCdensity;
\r
496 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){
\r
499 "Tr1.="<<((bestConst)? bestConst:dummy)<<
\r
500 "Tr2.="<<bestLong<<
\r
501 "Tr3.="<<&trackat0<<
\r
502 "Esd.="<<esdtrack<<
\r
503 "Dist="<<dist[itsindex]<<
\r
504 "ND0="<<normdist0[itsindex]<<
\r
505 "ND1="<<normdist1[itsindex]<<
\r
506 "ND="<<normdist[itsindex]<<
\r
507 "Pz="<<primvertex[2]<<
\r
508 "Forbid="<<forbidden[itsindex]<<
\r
512 trackarray.AddAt(best,itsindex);
\r
513 trackarrayc.AddAt(bestConst,itsindex);
\r
514 trackarrayl.AddAt(bestLong,itsindex);
\r
515 new (&helixes[itsindex]) AliHelix(*best);
\r
520 // first iterration of V0 finder
\r
522 // AM Comment out for optimization
\r
523 // Int_t rejectBase=0;
\r
526 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
\r
527 Int_t itrack0 = itsmap[iesd0];
\r
528 //-AM comment for optimization and store the forbidden value in the debug streamer
\r
529 if (forbidden[itrack0]) continue;
\r
530 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
\r
531 if (!btrack0) continue;
\r
532 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
\r
534 for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){
\r
535 Int_t itrack1 = itsmap[iesd1];
\r
536 //-AM comment for optimization and store the forbidden value in the debug streamer
\r
537 if (forbidden[itrack1]) continue;
\r
539 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
\r
540 if (!btrack1) continue;
\r
542 if ( (btrack0->GetSign()==btrack1->GetSign()) && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;
\r
544 Bool_t isGold = kFALSE;
\r
545 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
\r
549 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
\r
550 AliHelix &h1 = helixes[itrack0];
\r
551 AliHelix &h2 = helixes[itrack1];
\r
553 // find linear distance
\r
558 Double_t phase[2][2],radius[2];
\r
559 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
\r
562 // rejectBase+=1<<cutN;
\r
565 Double_t delta[2]={1000000,1000000};
\r
567 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
\r
569 if (radius[1]<rmin) rmin = radius[1];
\r
570 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
\r
572 rmin = TMath::Sqrt(rmin);
\r
573 Double_t distance = 0;
\r
574 Double_t radiusC = 0;
\r
576 if (points==1 || delta[0]<delta[1]){
\r
577 distance = TMath::Sqrt(delta[0]);
\r
578 radiusC = TMath::Sqrt(radius[0]);
\r
580 distance = TMath::Sqrt(delta[1]);
\r
581 radiusC = TMath::Sqrt(radius[1]);
\r
584 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])){
\r
586 //rejectBase+=1<<cutN;
\r
589 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])){
\r
591 // rejectBase+=1<<cutN;
\r
594 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
\r
595 if (distance>maxDist){
\r
597 // rejectBase+=1<<cutN;
\r
600 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
\r
601 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) {
\r
603 // rejectBase+=1<<cutN;
\r
608 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
\r
610 // if (distance>maxDist) continue;
\r
611 // if (pvertex->GetRr()<kMinR) continue;
\r
612 // if (pvertex->GetRr()>kMaxR) continue;
\r
613 AliITStrackMI * track0=btrack0;
\r
614 AliITStrackMI * track1=btrack1;
\r
615 // if (pvertex->GetRr()<3.5){
\r
617 //use longest tracks inside the pipe
\r
618 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
\r
619 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
\r
626 pvertex->SetParamN(*track0);
\r
627 pvertex->SetParamP(*track1);
\r
628 pvertex->Update(primvertex);
\r
629 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
\r
631 // Define gamma, K0, lambda and lambda_bar from the decay particles and calculate the chi2
\r
632 AliKFVertex vertexKF;
\r
634 vertexKF.X() = tracker->GetX();
\r
635 vertexKF.Y() = tracker->GetY();
\r
636 vertexKF.Z() = tracker->GetZ();
\r
637 vertexKF.Covariance(0,0) = tracker->GetSigmaX()*tracker->GetSigmaX();
\r
638 vertexKF.Covariance(1,2) = tracker->GetSigmaY()*tracker->GetSigmaY();
\r
639 vertexKF.Covariance(2,2) = tracker->GetSigmaZ()*tracker->GetSigmaZ();
\r
641 AliKFParticle elecKF( *(pvertex->GetParamN()) ,11);
\r
642 AliKFParticle posiKF( *(pvertex->GetParamP()) ,-11);
\r
643 AliKFParticle pipKF( *(pvertex->GetParamN()) , 211);
\r
644 AliKFParticle pinKF( *(pvertex->GetParamP()) ,-211);
\r
645 AliKFParticle protKF( *(pvertex->GetParamP()) ,2212);
\r
646 AliKFParticle aproKF ( *(pvertex->GetParamN()) ,-2212);
\r
650 AliKFParticle gamKF(elecKF,posiKF);
\r
651 gamKF.SetProductionVertex(vertexKF);
\r
653 Float_t gamKFchi2 = 1000;
\r
654 if ( gamKF.GetNDF()!=0 ){
\r
655 gamKFchi2 = gamKF.GetChi2()/gamKF.GetNDF();
\r
659 Float_t sigmaMG=0.001;
\r
660 gamKF.SetMassConstraint(massG,sigmaMG);
\r
662 Float_t gamKFchi2C = 1000;
\r
663 if ( gamKF.GetNDF()!=0 ){
\r
664 gamKFchi2C = gamKF.GetChi2()/gamKF.GetNDF();
\r
668 AliKFParticle k0KF(pipKF,pinKF);
\r
669 k0KF.SetProductionVertex(vertexKF);
\r
671 Float_t k0KFchi2 = 1000;
\r
672 if ( k0KF.GetNDF()!=0 ){
\r
673 k0KFchi2 = k0KF.GetChi2()/k0KF.GetNDF();
\r
677 AliKFParticle lambdaKF(protKF,pinKF);
\r
678 lambdaKF.SetProductionVertex(vertexKF);
\r
680 Float_t lambdaKFchi2 = 1000;
\r
681 if ( lambdaKF.GetNDF()!=0 ){
\r
682 lambdaKFchi2 = lambdaKF.GetChi2()/lambdaKF.GetNDF();
\r
686 AliKFParticle alambKF(aproKF,pipKF);
\r
687 alambKF.SetProductionVertex(vertexKF);
\r
689 Float_t alambKFchi2 = 1000;
\r
690 if ( alambKF.GetNDF()!=0 ){
\r
691 alambKFchi2 = alambKF.GetChi2()/alambKF.GetNDF();
\r
698 if (pvertex->GetRr()<kMinR){
\r
700 // rejectBase+=1<<cutN;
\r
703 if (pvertex->GetRr()>kMaxR){
\r
705 // rejectBase+=1<<cutN;
\r
708 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle){
\r
710 // rejectBase+=1<<cutN;
\r
713 //Bo: if (pvertex->GetDist2()>maxDist) continue;
\r
715 if (pvertex->GetDcaV0Daughters()>maxDist){
\r
717 // rejectBase+=1<<cutN;
\r
720 //Bo: pvertex->SetLab(0,track0->GetLabel());
\r
721 //Bo: pvertex->SetLab(1,track1->GetLabel());
\r
722 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
\r
723 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
\r
725 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
\r
726 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
\r
730 TObjArray * array0b = (TObjArray*)bestHypothesys->At(itrack0);
\r
731 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<kMinTgl1) {
\r
732 tracker->SetCurrentEsdTrack(itrack0);
\r
733 tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack0),itrack0, kFALSE);
\r
735 TObjArray * array1b = (TObjArray*)bestHypothesys->At(itrack1);
\r
736 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<kMinTgl1) {
\r
737 tracker->SetCurrentEsdTrack(itrack1);
\r
738 tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack1),itrack1, kFALSE);
\r
741 AliITStrackMI * track0b = (AliITStrackMI*)originalTracks->At(itrack0);
\r
742 AliITStrackMI * track1b = (AliITStrackMI*)originalTracks->At(itrack1);
\r
743 AliITStrackMI * track0l = (AliITStrackMI*)originalTracks->At(itrack0);
\r
744 AliITStrackMI * track1l = (AliITStrackMI*)originalTracks->At(itrack1);
\r
746 Float_t minchi2before0=kMinchi2before0;
\r
747 Float_t minchi2before1=kMinchi2before1;
\r
748 Float_t minchi2after0 =kMinchi2after0;
\r
749 Float_t minchi2after1 =kMinchi2after1;
\r
750 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
\r
751 Int_t maxLayer = tracker->GetNearestLayer(xrp); //I.B.
\r
753 if (array0b) for (Int_t i=0;i<5;i++){
\r
754 // best track after vertex
\r
755 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
\r
756 if (!btrack) continue;
\r
757 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
\r
758 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
\r
759 if (btrack->GetX()<pvertex->GetRr()-2.) {
\r
760 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
\r
761 Float_t sumchi2= 0;
\r
763 if (maxLayer<3){ // take prim vertex as additional measurement
\r
764 if (normdist[itrack0]>0 && htrackc0){
\r
765 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
\r
767 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
\r
769 sumn += 3-maxLayer;
\r
771 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
\r
773 if (btrack->GetClIndex(ilayer)<0){
\r
774 sumchi2+=kAddchi2NegCl0;
\r
777 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
\r
778 for (Int_t itrack=0;itrack<4;itrack++){
\r
779 AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);
\r
780 if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack0){
\r
781 sumchi2+=kAddchi2SharedCl; //shared cluster
\r
785 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
\r
786 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
\r
790 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
\r
792 continue; //safety space - Geo manager will give exact layer
\r
795 minchi2after0 = btrack->GetNormChi2(i);
\r
798 if (array1b) for (Int_t i=0;i<5;i++){
\r
799 // best track after vertex
\r
800 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
\r
801 if (!btrack) continue;
\r
802 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
\r
803 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
\r
804 if (btrack->GetX()<pvertex->GetRr()-2){
\r
805 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
\r
806 Float_t sumchi2= 0;
\r
808 if (maxLayer<3){ // take prim vertex as additional measurement
\r
809 if (normdist[itrack1]>0 && htrackc1){
\r
810 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
\r
812 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
\r
814 sumn += 3-maxLayer;
\r
816 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
\r
818 if (btrack->GetClIndex(ilayer)<0){
\r
819 sumchi2+=kAddchi2NegCl1;
\r
822 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
\r
823 for (Int_t itrack=0;itrack<4;itrack++){
\r
824 AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);
\r
825 if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack1){
\r
826 sumchi2+=kAddchi2SharedCl; //shared cluster
\r
830 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
\r
831 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
\r
835 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
\r
837 continue; //safety space - Geo manager will give exact layer
\r
840 minchi2after1 = btrack->GetNormChi2(i);
\r
844 // position resolution - used for DCA cut
\r
845 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
\r
846 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
\r
847 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
\r
848 sigmad =TMath::Sqrt(sigmad)+0.04;
\r
849 if (pvertex->GetRr()>50){
\r
850 Double_t cov0[15],cov1[15];
\r
851 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
\r
852 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
\r
853 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
\r
854 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
\r
855 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
\r
856 sigmad =TMath::Sqrt(sigmad)+0.05;
\r
860 vertex2.SetParamN(*track0b);
\r
861 vertex2.SetParamP(*track1b);
\r
862 vertex2.Update(primvertex);
\r
863 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
\r
864 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
\r
865 pvertex->SetParamN(*track0b);
\r
866 pvertex->SetParamP(*track1b);
\r
867 pvertex->Update(primvertex);
\r
868 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
\r
869 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
\r
870 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
\r
872 pvertex->SetDistSigma(sigmad);
\r
873 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
\r
874 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
\r
876 // define likelihhod and causalities
\r
878 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
\r
880 Float_t fnorm0 = normdist[itrack0];
\r
881 if (fnorm0<0) fnorm0*=-3;
\r
882 Float_t fnorm1 = normdist[itrack1];
\r
883 if (fnorm1<0) fnorm1*=-3;
\r
884 if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){
\r
885 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
\r
886 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
\r
888 pvertex->SetChi2Before(normdist[itrack0]);
\r
889 pvertex->SetChi2After(normdist[itrack1]);
\r
890 pvertex->SetNAfter(0);
\r
891 pvertex->SetNBefore(0);
\r
893 pvertex->SetChi2Before(minchi2before0);
\r
894 pvertex->SetChi2After(minchi2before1);
\r
895 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
\r
896 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
\r
897 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
\r
899 pvertex->SetNAfter(maxLayer);
\r
900 pvertex->SetNBefore(maxLayer);
\r
902 if (pvertex->GetRr()<90){
\r
903 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
\r
904 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
\r
906 if (pvertex->GetRr()<20){
\r
907 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
\r
908 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
\r
911 pvertex->SetCausality(pb0,pb1,pa0,pa1);
\r
913 // Likelihood calculations - apply cuts
\r
916 // AM - Comment out for optimization and store the v0OK value
\r
919 Bool_t v0OK = kTRUE;
\r
922 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
\r
923 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
\r
924 p12 = TMath::Sqrt(p12); // "mean" momenta
\r
926 Float_t sigmap0 = kSigp0Par0+kSigp0Par1/(kSigp0Par2+pvertex->GetRr());
\r
927 Float_t sigmap = kSigpPar0*sigmap0*(kSigpPar1+kSigpPar2*p12); // "resolution: of point angle - as a function of radius and momenta
\r
930 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
\r
931 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*
\r
932 TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));
\r
934 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
\r
935 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
\r
936 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<kMaxDcaLh0)*(lDistNorm<5);
\r
938 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
\r
939 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
\r
940 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
\r
941 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
\r
943 if (causalityA<kCausality0Cut){
\r
945 // v0OK += 1<<cutOKN;
\r
948 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut){
\r
950 // v0OK += 1<<cutOKN;
\r
953 if (likelihood1<kLikelihood1Cut){
\r
955 // v0OK += 1<<cutOKN;
\r
958 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut){
\r
960 // v0OK += 1<<cutOKN;
\r
965 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){
\r
966 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
\r
968 "Tr0.="<<track0<< //best without constrain
\r
969 "Tr1.="<<track1<< //best without constrain
\r
970 "posiKF.="<<&posiKF<< //KF from track0
\r
971 "elecKF.="<<&elecKF<< //KF from track1
\r
972 "Tr0B.="<<track0b<< //best without constrain after vertex
\r
973 "Tr1B.="<<track1b<< //best without constrain after vertex
\r
974 "Tr0C.="<<htrackc0<< //best with constrain if exist
\r
975 "Tr1C.="<<htrackc1<< //best with constrain if exist
\r
976 "Tr0L.="<<track0l<< //longest best
\r
977 "Tr1L.="<<track1l<< //longest best
\r
978 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
\r
979 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
\r
980 "V0.="<<pvertex<< //vertex properties
\r
981 "V0b.="<<&vertex2<< //vertex properties at "best" track
\r
982 "gamKF.="<<&gamKF<< //KF from pvertex
\r
983 "k0KF.="<<&k0KF<< //KF from pvertex
\r
984 "lambdaKF.="<<&lambdaKF<< //KF from pvertex
\r
985 "alambKF.="<<&lambdaKF<< //KF from pvertex
\r
986 "gamKFchi2="<<gamKFchi2<< //Normalized chi2 from KF assuming gamma momther
\r
987 "gamKFchi2C="<<gamKFchi2C<< //Normalized chi2 from KF assuming gamma mother+mass constraint
\r
988 "k0KFchi2="<<k0KFchi2<< //Normalized chi2 from KF assuming K0 mother
\r
989 "lambdaKFchi2="<<lambdaKFchi2<< //Normalized chi2 from KF assuming Lambda mother
\r
990 "alambKFchi2="<<alambKFchi2<< //Normalized chi2 from KF assuming lambda_bar mother
\r
991 "ND0="<<normdist[itrack0]<< //normalize distance for track0
\r
992 "ND1="<<normdist[itrack1]<< //normalize distance for track1
\r
994 // "RejectBase="<<rejectBase<< //rejection in First itteration
\r
997 "sigmad="<<sigmad<<
\r
998 "Forbid0="<<forbidden[itrack0]<<
\r
999 "Forbid1="<<forbidden[itrack1]<<
\r
1002 // if (rejectBase>0) continue;
\r
1003 //if (forbidden[itrack0]>0 ||forbidden[itrack1]>0) continue;
\r
1005 pvertex->SetStatus(0);
\r
1006 // if (rejectBase) {
\r
1007 // pvertex->SetStatus(-100);
\r
1009 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
\r
1010 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
\r
1011 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
\r
1012 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
\r
1015 // AliV0vertex vertexjuri(*track0,*track1);
\r
1016 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
\r
1017 // event->AddV0(&vertexjuri);
\r
1018 pvertex->SetStatus(100);
\r
1020 pvertex->SetOnFlyStatus(kTRUE);
\r
1021 pvertex->ChangeMassHypothesis(kK0Short);
\r
1022 event->AddV0(pvertex);
\r
1028 // delete temporary arrays
\r
1030 delete[] forbidden;
\r
1031 delete[] minPointAngle;
\r
1035 delete[] normdist;
\r
1036 delete[] normdist1;
\r
1037 delete[] normdist0;
\r
1044 //------------------------------------------------------------------------
\r
1045 void AliITSV0Finder::RefitV02(const AliESDEvent *event,
\r
1046 AliITStrackerMI *tracker)
\r
1049 //try to refit V0s in the third path of the reconstruction
\r
1051 TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());
\r
1053 Int_t nv0s = event->GetNumberOfV0s();
\r
1054 Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};
\r
1056 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
\r
1057 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
\r
1058 if (!v0mi) continue;
\r
1059 Int_t itrack0 = v0mi->GetIndex(0);
\r
1060 Int_t itrack1 = v0mi->GetIndex(1);
\r
1061 AliESDtrack *esd0 = event->GetTrack(itrack0);
\r
1062 AliESDtrack *esd1 = event->GetTrack(itrack1);
\r
1063 if (!esd0||!esd1) continue;
\r
1064 AliITStrackMI tpc0(*esd0);
\r
1065 AliITStrackMI tpc1(*esd1);
\r
1066 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
\r
1067 Double_t alpha =TMath::ATan2(y,x); //I.B.
\r
1068 if (v0mi->GetRr()>85){
\r
1069 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
\r
1070 v0temp.SetParamN(tpc0);
\r
1071 v0temp.SetParamP(tpc1);
\r
1072 v0temp.Update(primvertex);
\r
1073 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<
\r
1075 "V0refit.="<<&v0temp<<
\r
1079 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
\r
1080 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
\r
1081 v0mi->SetParamN(tpc0);
\r
1082 v0mi->SetParamP(tpc1);
\r
1083 v0mi->Update(primvertex);
\r
1088 if (v0mi->GetRr()>35){
\r
1089 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
\r
1090 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
\r
1091 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
\r
1092 v0temp.SetParamN(tpc0);
\r
1093 v0temp.SetParamP(tpc1);
\r
1094 v0temp.Update(primvertex);
\r
1095 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<
\r
1097 "V0refit.="<<&v0temp<<
\r
1101 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
\r
1102 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
\r
1103 v0mi->SetParamN(tpc0);
\r
1104 v0mi->SetParamP(tpc1);
\r
1105 v0mi->Update(primvertex);
\r
1110 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
\r
1111 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
\r
1112 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
\r
1113 if (tracker->RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) &&
\r
1114 tracker->RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
\r
1115 v0temp.SetParamN(tpc0);
\r
1116 v0temp.SetParamP(tpc1);
\r
1117 v0temp.Update(primvertex);
\r
1118 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<
\r
1120 "V0refit.="<<&v0temp<<
\r
1124 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
\r
1125 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
\r
1126 v0mi->SetParamN(tpc0);
\r
1127 v0mi->SetParamP(tpc1);
\r
1128 v0mi->Update(primvertex);
\r
1133 //------------------------------------------------------------------------
\r
1136 AliITSV0Finder::~AliITSV0Finder()
\r
1141 if (fDebugStreamer) {
\r
1142 //fDebugStreamer->Close();
\r
1143 delete fDebugStreamer;
\r