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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 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | /* | |
18 | Analysis Task | |
19 | for Dijet Analysis | |
20 | based on AOD | |
21 | */ | |
22 | ||
23 | #include "AliAnalysisTaskDiJets.h" | |
24 | #include "AliAODEvent.h" | |
25 | #include "AliAODJet.h" | |
26 | #include "AliAODDiJet.h" | |
27 | #include <TClonesArray.h> | |
28 | #include <TLorentzVector.h> | |
29 | #include <TStyle.h> | |
30 | ||
31 | ||
32 | ClassImp(AliAnalysisTaskDiJets) | |
33 | ||
34 | //////////////////////////////////////////////////////////////////////// | |
35 | ||
36 | AliAnalysisTaskDiJets::AliAnalysisTaskDiJets(): | |
37 | AliAnalysisTaskSE(), | |
38 | fDiJets(0), | |
39 | fDiJetsIn(0), | |
40 | fUseAODInput(kFALSE), | |
41 | fFillAOD(kFALSE), | |
42 | fJetBranch("jets"), | |
43 | fAOD(0), | |
44 | fHistList(0), | |
45 | fH1DeltaPt(0), | |
46 | fH1DeltaPhi(0), | |
47 | fH1PhiImbal(0), | |
48 | fH1Asym(0), | |
49 | fH2Pt2vsPt1(0), | |
50 | fH2DifvsSum(0) | |
51 | { | |
52 | // Default constructor | |
53 | } | |
54 | ||
55 | //---------------------------------------------------------------------- | |
56 | AliAnalysisTaskDiJets::AliAnalysisTaskDiJets(const char* name): | |
57 | AliAnalysisTaskSE(name), | |
58 | fDiJets(0), | |
59 | fDiJetsIn(0), | |
60 | fUseAODInput(kFALSE), | |
61 | fFillAOD(kFALSE), | |
62 | fJetBranch("jets"), | |
63 | fAOD(0), | |
64 | fHistList(0), | |
65 | fH1DeltaPt(0), | |
66 | fH1DeltaPhi(0), | |
67 | fH1PhiImbal(0), | |
68 | fH1Asym(0), | |
69 | fH2Pt2vsPt1(0), | |
70 | fH2DifvsSum(0) | |
71 | { | |
72 | // Default constructor | |
73 | DefineOutput(1, TList::Class()); | |
74 | } | |
75 | ||
76 | //---------------------------------------------------------------------- | |
77 | void AliAnalysisTaskDiJets::UserCreateOutputObjects() | |
78 | { | |
79 | // Create the output container | |
80 | // | |
81 | if (fDebug) printf("AnalysisTaskDiJets::CreateOutPutData() \n"); | |
82 | fDiJets = new TClonesArray("AliAODDiJet", 0); | |
83 | if (fFillAOD){ | |
84 | fDiJets->SetName(Form("dijets_%s",fJetBranch.Data())); | |
85 | AddAODBranch("TClonesArray", &fDiJets); | |
86 | } | |
87 | ||
88 | if (!fHistList) fHistList = new TList(); | |
89 | fHistList->SetOwner(); | |
90 | Float_t pi=TMath::Pi(); | |
91 | gStyle->SetPalette(1); | |
92 | ||
93 | fH1DeltaPt = new TH1F("DeltaPt","Difference between the jets' Pt;#Deltap_{T} (GeV/c);Entries",150,0.,150.); | |
94 | fH1DeltaPt->SetMarkerSize(0.6); | |
95 | fH1DeltaPt->SetMarkerColor(4); | |
96 | fH1DeltaPt->SetMarkerStyle(21); | |
97 | fH1DeltaPt->SetOption("E"); | |
98 | ||
99 | fH1DeltaPhi = new TH1F("DeltaPhi","Difference in the azimuthal angle;#Delta#phi;Entries",100,0.,pi); | |
100 | fH1DeltaPhi->SetMarkerSize(0.6); | |
101 | fH1DeltaPhi->SetMarkerColor(4); | |
102 | fH1DeltaPhi->SetMarkerStyle(21); | |
103 | fH1DeltaPhi->SetOption("E"); | |
104 | ||
105 | fH1PhiImbal = new TH1F("PhiImb","Phi imbalance;#phi;Entries",100,-pi,pi); | |
106 | fH1PhiImbal->SetMarkerSize(0.6); | |
107 | fH1PhiImbal->SetMarkerColor(4); | |
108 | fH1PhiImbal->SetMarkerStyle(21); | |
109 | fH1PhiImbal->SetOption("E"); | |
110 | ||
111 | fH1Asym = new TH1F("Asym","Pt asymmetry;#Deltap_{T}/(p_{T,1}+p_{T,2});Entries",50,0.,1.); | |
112 | fH1Asym->SetMarkerSize(0.6); | |
113 | fH1Asym->SetMarkerColor(4); | |
114 | fH1Asym->SetMarkerStyle(21); | |
115 | fH1Asym->SetOption("E"); | |
116 | ||
117 | fH2Pt2vsPt1 = new TH2F("Pt2vsPt1","Pt2 versus Pt1;p_{T,1} (GeV/c);p_{T,2} (GeV/c)",250,0.,250.,250,0.,250.); | |
118 | fH2Pt2vsPt1->SetOption("cont0"); | |
119 | ||
120 | fH2DifvsSum = new TH2F("DifvsSum","Pt difference vs Pt sum;p_{T,1}+p_{T,2} (GeV/c);#Deltap_{T} (GeV/c)",400,0.,400.,150,0.,150.); | |
121 | fH2DifvsSum->SetOption("cont0"); | |
122 | ||
123 | fHistList->Add(fH1DeltaPt); | |
124 | fHistList->Add(fH1DeltaPhi); | |
125 | fHistList->Add(fH1PhiImbal); | |
126 | fHistList->Add(fH1Asym); | |
127 | fHistList->Add(fH2Pt2vsPt1); | |
128 | fHistList->Add(fH2DifvsSum); | |
129 | } | |
130 | ||
131 | //---------------------------------------------------------------------- | |
132 | void AliAnalysisTaskDiJets::Init() | |
133 | { | |
134 | // Initialization | |
135 | if (fDebug) printf("AnalysisTaskDiJets::Init() \n"); | |
136 | } | |
137 | ||
138 | //---------------------------------------------------------------------- | |
139 | void AliAnalysisTaskDiJets::UserExec(Option_t */*option*/) | |
140 | { | |
141 | // Execute analysis for current event | |
142 | // | |
143 | if (fDiJets) fDiJets->Delete(); | |
144 | ||
145 | if(fUseAODInput){ | |
146 | fAOD = dynamic_cast<AliAODEvent*> (InputEvent()); | |
147 | if(!fAOD){ | |
148 | // We do not have an input AOD, look in the output | |
149 | if (fDebug) printf("%s:%d No AOD event in the input\n",(char*)__FILE__,__LINE__); | |
150 | return; | |
151 | } | |
152 | } else { | |
153 | fAOD = AODEvent(); | |
154 | if(!fAOD){ | |
155 | if (fDebug) printf("%s:%d AODEvent not found in the Output",(char*)__FILE__,__LINE__); | |
156 | return; | |
157 | } | |
158 | } | |
159 | ||
160 | TClonesArray* jets = (TClonesArray*) fAOD->FindListObject(fJetBranch.Data()); | |
161 | // N.B. if we take the aod from the output this is always | |
162 | // empty and since it is the same as fDiJets | |
163 | fDiJetsIn = (TClonesArray*) (fAOD->GetList()->FindObject("dijets")); | |
164 | ||
165 | if (fDiJetsIn) { | |
166 | if (fDebug) printf("Found %d dijets in old list \n", fDiJetsIn->GetEntries()); | |
167 | AliAODJet* jj1, *jj2; | |
168 | AliAODDiJet* testJ; | |
169 | ||
170 | if (fDiJetsIn->GetEntries() > 0) { | |
171 | testJ = (AliAODDiJet*) (fDiJetsIn->At(0)); | |
172 | jj1 = testJ->Jet(0); | |
173 | jj1->Print(""); | |
174 | jj2 = testJ->Jet(1); | |
175 | jj2->Print(""); | |
176 | } | |
177 | } | |
178 | ||
179 | Int_t nj = jets->GetEntriesFast(); | |
180 | if (fDebug) printf("There are %5d jets in the event \n", nj); | |
181 | ||
182 | if (nj < 2){ | |
183 | PostData(1, fHistList); | |
184 | return; | |
185 | } | |
186 | AliAODJet* jet1 = (AliAODJet*) (jets->At(0)); | |
187 | TLorentzVector v1 = *(jet1->MomentumVector()); | |
188 | AliAODJet* jet2 = (AliAODJet*) (jets->At(1)); | |
189 | TLorentzVector v2 = *(jet2->MomentumVector()); | |
190 | TLorentzVector v = v1 + v2; | |
191 | if (fDiJets) { | |
192 | Int_t ndi = fDiJets->GetEntriesFast(); | |
193 | TClonesArray &lref = *fDiJets; | |
194 | new(lref[ndi]) AliAODDiJet(v); | |
195 | AliAODDiJet* dijet = (AliAODDiJet*) (fDiJets->At(ndi)); | |
196 | dijet->SetJetRefs(jet1, jet2); | |
197 | fH1DeltaPhi->Fill(dijet->DeltaPhi()); | |
198 | fH1PhiImbal->Fill(dijet->PhiImbalance()); | |
199 | ||
200 | } | |
201 | ||
202 | fH1DeltaPt->Fill(jet1->Pt()-jet2->Pt()); | |
203 | fH1Asym->Fill((jet1->Pt()-jet2->Pt())/(jet1->Pt()+jet2->Pt())); | |
204 | fH2Pt2vsPt1->Fill(jet1->Pt(),jet2->Pt()); | |
205 | fH2DifvsSum->Fill(jet1->Pt()+jet2->Pt(),jet1->Pt()-jet2->Pt()); | |
206 | ||
207 | PostData(1, fHistList); | |
208 | return; | |
209 | } | |
210 | ||
211 | //---------------------------------------------------------------------- | |
212 | void AliAnalysisTaskDiJets::Terminate(Option_t */*option*/) | |
213 | { | |
214 | // Terminate analysis | |
215 | // | |
216 | if (fDebug) printf("AnalysisDiJets: Terminate() \n"); | |
217 | } | |
218 |