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. *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
17 // checks ITS PID based on ITS dE/dx truncated mean
19 // Authors: Matus Kalisky <matus.kalisky@cern.ch>
20 // Markus Fasel <M.Fasel@gsi.de>
28 //#include "AliAODTrack.h"
29 //#include "AliAODMCParticle.h"
30 #include "AliESDtrack.h"
33 #include "AliVParticle.h"
35 #include "AliHFEpidITS.h"
37 //___________________________________________________________________
38 AliHFEpidITS::AliHFEpidITS(const Char_t *name):
43 // Default constructor
47 //___________________________________________________________________
48 AliHFEpidITS::AliHFEpidITS(const AliHFEpidITS &ref):
58 //___________________________________________________________________
59 AliHFEpidITS &AliHFEpidITS::operator=(const AliHFEpidITS &ref){
61 // Assignment operator
63 if(this != &ref) ref.Copy(*this);
67 //___________________________________________________________________
68 AliHFEpidITS::~AliHFEpidITS(){
78 //___________________________________________________________________
79 void AliHFEpidITS::Copy(TObject &o) const {
82 // Provides a deep copy
84 AliHFEpidITS &target = dynamic_cast<AliHFEpidITS &>(o);
86 target.fQAlist = dynamic_cast<TList *>(fQAlist->Clone());
87 AliHFEpidBase::Copy(target);
90 //___________________________________________________________________
91 Bool_t AliHFEpidITS::InitializePID(){
93 // ITS PID initialization
99 //___________________________________________________________________
100 Int_t AliHFEpidITS::IsSelected(AliHFEpidObject* /*track*/){
102 // Does PID decision for ITS
104 return 11; // @TODO: Implement ITS PID decision
107 //___________________________________________________________________
108 void AliHFEpidITS::AddQAhistograms(TList *l){
110 // Adding QA histograms for ITS PID
112 // QA histograms are:
113 // - all Particles ITS signal vs. p (both methods)
114 // - single particle ITS signal vs. p (both methods)
116 if(!fQAlist) fQAlist = new TList;
117 fQAlist->SetName("fITSqaHistograms");
120 const Int_t kMomentumBins = 41;
121 const Double_t kPtMin = 0.1;
122 const Double_t kPtMax = 10.;
123 const Int_t kSigBins = 300;
124 Double_t momentumBins[kMomentumBins];
125 for(Int_t ibin = 0; ibin < kMomentumBins; ibin++)
126 momentumBins[ibin] = static_cast<Double_t>(TMath::Power(10,TMath::Log10(kPtMin) + (TMath::Log10(kPtMax)-TMath::Log10(kPtMin))/(kMomentumBins-1)*static_cast<Double_t>(ibin)));
129 fQAlist->AddAt((histo = new TH2F("fITSsigV1all", "ITS signal vs. p (all species, Method1):p / GeV/c:ITS signal / a.u.", kMomentumBins - 1, momentumBins, kSigBins, 0., kSigBins)), kITSsigV1);
130 fQAlist->AddAt((histo = new TH2F("fITSsigV2all", "ITS signal vs. p (all species, Method2):p / GeV/c:ITS signal / a.u.", kMomentumBins - 1, momentumBins, kSigBins, 0., kSigBins)), kITSsigV2);
131 for(Int_t ispec = 0; ispec < AliPID::kSPECIES; ispec++){
132 fQAlist->AddAt((histo = new TH2F(Form("fITSsigV1%s", AliPID::ParticleName(ispec)), Form("ITS signal vs. p (%s, Method1):p / GeV/c:ITS signal / a.u.", AliPID::ParticleName(ispec)), kMomentumBins - 1, momentumBins, kSigBins, 0., kSigBins)), 2 * ispec + kHistosSigAll);
133 fQAlist->AddAt((histo = new TH2F(Form("fITSsigV2%s", AliPID::ParticleName(ispec)), Form("ITS signal vs. p (%s, Method2):p / GeV/c:ITS signal / a.u.", AliPID::ParticleName(ispec)), kMomentumBins - 1, momentumBins, kSigBins, 0., kSigBins)), 2 * ispec + 1 + kHistosSigAll);
138 //___________________________________________________________________
139 Double_t AliHFEpidITS::GetITSSignalV1(AliVParticle *vtrack, Int_t mcPID){
141 // Calculate the ITS signal according to the mean charge of the clusters
143 if(!TString(vtrack->IsA()->GetName()).CompareTo("AliAODtrack")){
144 AliError("PID for AODs not implemented yet");
147 AliESDtrack *track = dynamic_cast<AliESDtrack *>(vtrack);
148 Double_t signal = 0.;
151 track->GetITSdEdxSamples(dedx);
152 signal = TMath::Mean(4, dedx);
154 signal = track->GetITSsignal();
156 Double_t p = track->GetTPCInnerParam() ? track->GetTPCInnerParam()->P() : track->P();
157 AliDebug(1, Form("Momentum: %f, ITS Signal: %f", p, signal));
158 if(IsQAon()) FillHistogramsSignalV1(p, signal, mcPID);
162 //___________________________________________________________________
163 Double_t AliHFEpidITS::GetITSSignalV2(AliVParticle *vtrack, Int_t mcPID){
165 // Calculates the ITS signal. Truncated mean is used.
167 if(!TString(vtrack->IsA()->GetName()).CompareTo("AliAODtrack")){
168 AliError("PID for AODs not implemented yet");
171 AliESDtrack *track = dynamic_cast<AliESDtrack *>(vtrack);
172 Double_t dedx[4], tmp[4];
174 track->GetITSdEdxSamples(tmp);
175 TMath::Sort(4, tmp, indices);
176 for(Int_t ien = 0; ien < 4; ien++) dedx[ien] = tmp[indices[ien]];
177 Double_t signal = TMath::Mean(3, dedx);
178 Double_t p = track->GetTPCInnerParam() ? track->GetTPCInnerParam()->P() : track->P();
179 AliDebug(1, Form("Momentum: %f, ITS Signal: %f", p, signal));
180 if(IsQAon()) FillHistogramsSignalV2(p, signal, mcPID);
184 //___________________________________________________________________
185 void AliHFEpidITS::FillHistogramsSignalV1(Double_t p, Double_t signal, Int_t species){
186 (dynamic_cast<TH2 *>(fQAlist->At(kITSsigV1)))->Fill(p, signal);
187 if(species >= 0 && species < AliPID::kSPECIES)
188 (dynamic_cast<TH2 *>(fQAlist->At(kHistosSigAll + 2 * species)))->Fill(p, signal);
191 //___________________________________________________________________
192 void AliHFEpidITS::FillHistogramsSignalV2(Double_t p, Double_t signal, Int_t species){
193 (dynamic_cast<TH2 *>(fQAlist->At(kITSsigV2)))->Fill(p, signal);
194 if(species >= 0 && species < AliPID::kSPECIES)
195 (dynamic_cast<TH2 *>(fQAlist->At(kHistosSigAll + 2 * species + 1)))->Fill(p, signal);