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e8a6457a | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, 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 | **************************************************************************/ | |
50685501 | 15 | // |
16 | // ITS PID class | |
17 | // checks ITS PID based on ITS dE/dx truncated mean | |
18 | // | |
19 | // Authors: Matus Kalisky <matus.kalisky@cern.ch> | |
20 | // Markus Fasel <M.Fasel@gsi.de> | |
21 | // | |
722347d8 | 22 | #include <TClass.h> |
e8a6457a | 23 | #include <TH2F.h> |
24 | #include <TList.h> | |
25 | #include <TMath.h> | |
722347d8 | 26 | #include <TString.h> |
e8a6457a | 27 | |
50685501 | 28 | //#include "AliAODTrack.h" |
29 | //#include "AliAODMCParticle.h" | |
e8a6457a | 30 | #include "AliESDtrack.h" |
31 | #include "AliLog.h" | |
32 | #include "AliPID.h" | |
33 | #include "AliVParticle.h" | |
34 | ||
35 | #include "AliHFEpidITS.h" | |
36 | ||
37 | //___________________________________________________________________ | |
38 | AliHFEpidITS::AliHFEpidITS(const Char_t *name): | |
39 | AliHFEpidBase(name) | |
40 | , fQAlist(0x0) | |
41 | { | |
42 | // | |
43 | // Default constructor | |
44 | // | |
45 | } | |
46 | ||
47 | //___________________________________________________________________ | |
48 | AliHFEpidITS::AliHFEpidITS(const AliHFEpidITS &ref): | |
49 | AliHFEpidBase("") | |
50 | , fQAlist(0x0) | |
51 | { | |
52 | // | |
53 | // Copy constructor | |
54 | // | |
55 | ref.Copy(*this); | |
56 | } | |
57 | ||
58 | //___________________________________________________________________ | |
59 | AliHFEpidITS &AliHFEpidITS::operator=(const AliHFEpidITS &ref){ | |
60 | // | |
61 | // Assignment operator | |
62 | // | |
63 | if(this != &ref) ref.Copy(*this); | |
64 | return *this; | |
65 | } | |
66 | ||
67 | //___________________________________________________________________ | |
68 | AliHFEpidITS::~AliHFEpidITS(){ | |
69 | // | |
70 | // Destructor | |
71 | // | |
72 | if(fQAlist){ | |
73 | fQAlist->Clear(); | |
74 | delete fQAlist; | |
75 | } | |
76 | } | |
77 | ||
78 | //___________________________________________________________________ | |
79 | void AliHFEpidITS::Copy(TObject &o) const { | |
80 | // | |
81 | // Copy function | |
82 | // Provides a deep copy | |
83 | // | |
84 | AliHFEpidITS &target = dynamic_cast<AliHFEpidITS &>(o); | |
85 | ||
86 | target.fQAlist = dynamic_cast<TList *>(fQAlist->Clone()); | |
87 | AliHFEpidBase::Copy(target); | |
88 | } | |
89 | ||
90 | //___________________________________________________________________ | |
91 | Bool_t AliHFEpidITS::InitializePID(){ | |
92 | // | |
93 | // ITS PID initialization | |
94 | // | |
95 | return kTRUE; | |
96 | } | |
97 | ||
98 | ||
99 | //___________________________________________________________________ | |
722347d8 | 100 | Int_t AliHFEpidITS::IsSelected(AliHFEpidObject* /*track*/){ |
e8a6457a | 101 | // |
102 | // Does PID decision for ITS | |
103 | // | |
104 | return 11; // @TODO: Implement ITS PID decision | |
105 | } | |
106 | ||
107 | //___________________________________________________________________ | |
108 | void AliHFEpidITS::AddQAhistograms(TList *l){ | |
109 | // | |
110 | // Adding QA histograms for ITS PID | |
111 | // | |
112 | // QA histograms are: | |
113 | // - all Particles ITS signal vs. p (both methods) | |
114 | // - single particle ITS signal vs. p (both methods) | |
115 | // | |
116 | if(!fQAlist) fQAlist = new TList; | |
117 | fQAlist->SetName("fITSqaHistograms"); | |
118 | ||
119 | // prepare axis | |
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))); | |
127 | ||
128 | TH2 *histo = NULL; | |
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); | |
134 | } | |
135 | l->Add(fQAlist); | |
136 | } | |
137 | ||
138 | //___________________________________________________________________ | |
722347d8 | 139 | Double_t AliHFEpidITS::GetITSSignalV1(AliVParticle *vtrack, Int_t mcPID){ |
e8a6457a | 140 | // |
141 | // Calculate the ITS signal according to the mean charge of the clusters | |
142 | // | |
722347d8 | 143 | if(!TString(vtrack->IsA()->GetName()).CompareTo("AliAODtrack")){ |
144 | AliError("PID for AODs not implemented yet"); | |
145 | return 0.; | |
146 | } | |
147 | AliESDtrack *track = dynamic_cast<AliESDtrack *>(vtrack); | |
e8a6457a | 148 | Double_t signal = 0.; |
149 | #ifdef TRUNK | |
150 | Double_t dedx[4]; | |
151 | track->GetITSdEdxSamples(dedx); | |
152 | signal = TMath::Mean(4, dedx); | |
153 | #else | |
154 | signal = track->GetITSsignal(); | |
155 | #endif | |
156 | Double_t p = track->GetTPCInnerParam() ? track->GetTPCInnerParam()->P() : track->P(); | |
157 | AliDebug(1, Form("Momentum: %f, ITS Signal: %f", p, signal)); | |
722347d8 | 158 | if(IsQAon()) FillHistogramsSignalV1(p, signal, mcPID); |
e8a6457a | 159 | return signal; |
160 | } | |
161 | ||
162 | //___________________________________________________________________ | |
722347d8 | 163 | Double_t AliHFEpidITS::GetITSSignalV2(AliVParticle *vtrack, Int_t mcPID){ |
e8a6457a | 164 | // |
165 | // Calculates the ITS signal. Truncated mean is used. | |
166 | // | |
722347d8 | 167 | if(!TString(vtrack->IsA()->GetName()).CompareTo("AliAODtrack")){ |
168 | AliError("PID for AODs not implemented yet"); | |
169 | return 0.; | |
170 | } | |
171 | AliESDtrack *track = dynamic_cast<AliESDtrack *>(vtrack); | |
e8a6457a | 172 | Double_t dedx[4], tmp[4]; |
173 | Int_t indices[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)); | |
722347d8 | 180 | if(IsQAon()) FillHistogramsSignalV2(p, signal, mcPID); |
e8a6457a | 181 | return signal; |
182 | } | |
183 | ||
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); | |
189 | } | |
190 | ||
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); | |
196 | } | |
197 |