1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
19 #include <THnSparse.h>
22 #include "AliESDtrack.h"
23 #include "AliExternalTrackParam.h"
24 #include "TParticle.h"
26 #include "AlidNdPtBackgroundCuts.h"
30 ClassImp(AlidNdPtBackgroundCuts)
32 //_____________________________________________________________________________
33 AlidNdPtBackgroundCuts::AlidNdPtBackgroundCuts(const Char_t* name,const Char_t *title) :
34 AliAnalysisCuts(name, title)
41 , fMaxFracSharedClust(0)
42 , fFillControlHisto(kFALSE)
45 // default constructor
47 // init data members with defaults
51 //_____________________________________________________________________________
52 AlidNdPtBackgroundCuts::~AlidNdPtBackgroundCuts()
55 if(fControlHisto) delete fControlHisto;
58 //_____________________________________________________________________________
59 void AlidNdPtBackgroundCuts::Init()
65 SetMaxFracSharedClust();
67 const Int_t ptNbins = 56;
68 Double_t binsPt[ptNbins+1] = {0.,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.85,0.9,0.95,1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.2,2.4,2.6,2.8,3.0,3.2,3.4,3.6,3.8,4.0,4.5,5.0,5.5,6.0,6.5,7.0,7.5,8.0,9.0,10.0,11.0,12.0,13.0,14.0,15.0,16.0};
70 //etasum:dphi:dpt:eta1:eta2:pt1:fracSharedClust1:qsum
71 Int_t binsControlHisto[8]= { 201, 401, 101, 30, 30, ptNbins, 101, 3 };
72 Double_t minControlHisto[8]={-3.0, -2.*TMath::Pi(), -10, -1.5, -1.5, 0., 0., 0.};
73 Double_t maxControlHisto[8]={ 3.0, 2.*TMath::Pi(), 10, 1.5, 1.5, 16., 1., 3.};
75 fControlHisto = new THnSparseF("fControlHisto","etasum:dphi:dpt:eta1:eta2:pt1:fracSharedClust1:qsum",8,binsControlHisto,minControlHisto,maxControlHisto);
76 fControlHisto->SetBinEdges(5,binsPt);
77 fControlHisto->GetAxis(0)->SetTitle("#eta1+#eta2");
78 fControlHisto->GetAxis(1)->SetTitle("#phi1-#phi2 (rad)");
79 fControlHisto->GetAxis(2)->SetTitle("pt1-pt2 (GeV/c)");
80 fControlHisto->GetAxis(3)->SetTitle("#eta1");
81 fControlHisto->GetAxis(4)->SetTitle("#eta2");
82 fControlHisto->GetAxis(5)->SetTitle("pt1 (GeV/c)");
83 fControlHisto->GetAxis(6)->SetTitle("fracSharedClust1");
84 fControlHisto->GetAxis(7)->SetTitle("q1+q2");
85 fControlHisto->Sumw2();
88 //_____________________________________________________________________________
89 Bool_t AlidNdPtBackgroundCuts::IsBackgroundTrack(AliESDtrack *track1, AliESDtrack *track2)
92 // check whether track is cosmic or splitted one
94 if(!track1) return kFALSE;
95 if(!track2) return kFALSE;
96 const AliExternalTrackParam *tpcTrack1 = track1->GetTPCInnerParam();
97 const AliExternalTrackParam *tpcTrack2 = track2->GetTPCInnerParam();
98 if(!tpcTrack1) return kFALSE;
99 if(!tpcTrack2) return kFALSE;
101 if( IsHistogramsOn() )
103 Float_t etasum = tpcTrack1->Eta() + tpcTrack2->Eta();
104 Float_t dphi = tpcTrack1->Phi() - tpcTrack2->Phi();
105 Float_t dpt = tpcTrack1->Pt() - tpcTrack2->Pt();
106 Float_t pt1 = tpcTrack1->Pt();
107 Float_t qsum = track1->Charge() + track2->Charge();
108 if(qsum == -2) qsum = 1;
110 Float_t nclust1 = track1->GetTPCNclsIter1() ; // first tracking pass
111 Float_t nclust2 = track2->GetTPCNclsIter1() ; // first tracking pass
112 Float_t fracSharedClust1 = 0.0;
113 if(nclust1) fracSharedClust1 = track1->GetTPCnclsS()/Float_t(nclust1);
115 //Float_t dsphi = (tpcTrack1->GetSnp()-tpcTrack2->GetSnp()) / TMath::Sqrt(tpcTrack1->GetSigmaSnp2()+tpcTrack2->GetSigmaSnp2());
116 //Float_t dtanl = (tpcTrack1->GetTgl()-tpcTrack2->GetTgl()) / TMath::Sqrt(tpcTrack1->GetSigmaTgl2()+tpcTrack2->GetSigmaTgl2());
117 //Float_t dsphi = tpcTrack1->GetSnp()-tpcTrack2->GetSnp();
118 //Float_t dtanl = tpcTrack1->GetTgl()-tpcTrack2->GetTgl();
123 printf("tpcTrack1->GetSnp() %e, track1->Pt() %f, track1->Theta() %f, track1->Eta() %f, track1->Phi() %f, track1->Charge() %d \n", tpcTrack1->GetSnp(), track1->Pt(), track1->Theta(), track1->Eta(), track1->Phi(), track1->Charge());
125 printf("tpcTrack2->GetSnp() %e, track2->Pt() %f, track2->Theta() %f, track2->Eta() %f, track2->Phi() %f, track2->Charge() %d \n", tpcTrack2->GetSnp(), track2->Pt(), track2->Theta(), track2->Eta(), track2->Phi(), track2->Charge());
128 Double_t vControlHisto[8] = {etasum, dphi, dpt, tpcTrack1->Eta(), tpcTrack2->Eta(), pt1, fracSharedClust1,qsum};
129 if(nclust1 > 70 && nclust2 > 70)
130 fControlHisto->Fill(vControlHisto);
133 if ( IsCosmicTrack(track1,track2) || IsSplittedTrack(track1,track2) ) return kTRUE;
139 //_____________________________________________________________________________
140 Bool_t AlidNdPtBackgroundCuts::IsCosmicTrack(AliESDtrack *track1, AliESDtrack *track2)
143 // check whether track is cosmic
145 if(!track1) return kFALSE;
146 if(!track2) return kFALSE;
147 const AliExternalTrackParam *tpcTrack1 = track1->GetTPCInnerParam();
148 const AliExternalTrackParam *tpcTrack2 = track2->GetTPCInnerParam();
149 if(!tpcTrack1) return kFALSE;
150 if(!tpcTrack2) return kFALSE;
153 Float_t etasum = tpcTrack1->Eta() + tpcTrack2->Eta();
154 Float_t dphi = tpcTrack1->Phi() - tpcTrack2->Phi();
155 Float_t dpt = tpcTrack1->Pt() - tpcTrack2->Pt();
156 Float_t pt1 = tpcTrack1->Pt();
158 Float_t qsum = track1->Charge() + track2->Charge();
160 Float_t nclust = track1->GetTPCNclsIter1() ; // first tracking pass
161 Float_t fracSharedClust = 0.0;
162 if(nclust) fracSharedClust = track1->GetTPCnclsS()/Float_t(nclust);
164 if( qsum != 0) return kFALSE;
169 //_____________________________________________________________________________
170 Bool_t AlidNdPtBackgroundCuts::IsSplittedTrack(AliESDtrack *track1, AliESDtrack *track2)
173 // check whether track is splitted
175 if(!track1) return kFALSE;
176 if(!track2) return kFALSE;
177 const AliExternalTrackParam *tpcTrack1 = track1->GetTPCInnerParam();
178 const AliExternalTrackParam *tpcTrack2 = track2->GetTPCInnerParam();
179 if(!tpcTrack1) return kFALSE;
180 if(!tpcTrack2) return kFALSE;
183 Float_t etasum = tpcTrack1->Eta() + tpcTrack2->Eta();
184 Float_t dphi = tpcTrack1->Phi() - tpcTrack2->Phi();
185 Float_t dpt = tpcTrack1->Pt() - tpcTrack2->Pt();
186 Float_t pt1 = tpcTrack1->Pt();
187 Float_t qsum = track1->Charge() + track2->Charge();
189 Float_t nclust = track1->GetTPCNclsIter1() ; // first tracking pass
190 Float_t fracSharedClust = 0.0;
191 if(nclust) fracSharedClust = track1->GetTPCnclsS()/Float_t(nclust);
199 //_____________________________________________________________________________
200 Long64_t AlidNdPtBackgroundCuts::Merge(TCollection* list)
202 // Merge list of objects (needed by PROOF)
209 TIterator* iter = list->MakeIterator();
213 while((obj = iter->Next()) != 0)
215 AlidNdPtBackgroundCuts* entry = dynamic_cast<AlidNdPtBackgroundCuts*>(obj);
219 fControlHisto->Add(entry->fControlHisto);