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 **************************************************************************/
16 //-----------------------------------------------------------------------
17 // Example of task running on AliEn (CAF?)
18 // which provides standard way of calculating acceptance and efficiency
19 // between different steps of the procedure.
20 // The ouptut of the task is a AliCFContainer from which the efficiencies
22 //-----------------------------------------------------------------------
23 // Author : R. Vernet, Consorzio Cometa - Catania (it)
24 //-----------------------------------------------------------------------
27 #ifndef ALICFV0TASK_CXX
28 #define ALICFV0TASK_CXX
30 #include "AliCFV0Task.h"
33 #include "TParticle.h"
35 #include "AliMCEvent.h"
36 #include "AliCFManager.h"
37 #include "AliCFContainer.h"
38 #include "AliESDtrack.h"
41 #include "AliV0vertexer.h"
42 #include "AliCFPair.h"
43 #include "AliESDEvent.h"
45 #include "AliCFParticleGenCuts.h"
47 //__________________________________________________________________________
48 AliCFV0Task::AliCFV0Task() :
53 fHistEventsProcessed(0x0)
59 //___________________________________________________________________________
60 AliCFV0Task::AliCFV0Task(const Char_t* name) :
61 AliAnalysisTaskSE(name),
65 fHistEventsProcessed(0x0)
68 // Constructor. Initialization of Inputs and Outputs
70 Info("AliCFV0Task","Calling Constructor");
72 DefineInput(0) and DefineOutput(0)
73 are taken care of by AliAnalysisTaskSE constructor
75 DefineOutput(1,TH1I::Class());
76 DefineOutput(2,AliCFContainer::Class());
77 // DefineOutput(3,TList::Class());
80 //___________________________________________________________________________
81 AliCFV0Task& AliCFV0Task::operator=(const AliCFV0Task& c)
84 // Assignment operator
87 AliAnalysisTaskSE::operator=(c) ;
88 fRebuildV0s = c.fRebuildV0s;
90 fCFManager = c.fCFManager;
91 fHistEventsProcessed = c.fHistEventsProcessed;
96 //___________________________________________________________________________
97 AliCFV0Task::AliCFV0Task(const AliCFV0Task& c) :
99 fRebuildV0s(c.fRebuildV0s),
101 fCFManager(c.fCFManager),
102 fHistEventsProcessed(c.fHistEventsProcessed)
109 //___________________________________________________________________________
110 AliCFV0Task::~AliCFV0Task() {
114 Info("~AliCFV0Task","Calling Destructor");
115 if (fCFManager) delete fCFManager ;
116 if (fHistEventsProcessed) delete fHistEventsProcessed ;
119 //_________________________________________________
120 void AliCFV0Task::UserExec(Option_t *)
123 // Main loop function
125 Info("UserExec","") ;
127 AliESDEvent* fESD = dynamic_cast<AliESDEvent*>(fInputEvent);
129 Error("UserExec","NO ESD FOUND!");
133 if (!fMCEvent) Error("UserExec","NO MC INFO FOUND!");
134 fCFManager->SetEventInfo(fMCEvent);
136 // MC-event selection
137 Double_t containerInput[2] ;
139 //loop on the MC event
140 Info("UserExec","Looping on MC event");
141 for (Int_t ipart=0; ipart<fMCEvent->GetNumberOfTracks(); ipart++) {
142 AliMCParticle *mcPart = fMCEvent->GetTrack(ipart);
144 //check the MC-level cuts
145 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartGenCuts,mcPart)) continue;
146 containerInput[0] = mcPart->Pt();
147 containerInput[1] = mcPart->Eta() ;
148 //fill the container for Gen-level selection
149 fCFManager->GetParticleContainer()->Fill(containerInput,kStepGenerated);
151 //check the Acceptance-level cuts
152 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartAccCuts,mcPart)) continue;
153 //fill the container for Acceptance-level selection
154 fCFManager->GetParticleContainer()->Fill(containerInput,kStepReconstructible);
158 //Now go to rec level
159 Info("UserExec","Looping on ESD event");
161 if (fRebuildV0s) RebuildV0s(fESD) ;
162 Info("UserExec","There are %d V0s in event",fESD->GetNumberOfV0s());
163 for (Int_t iV0 = 0; iV0<fESD->GetNumberOfV0s(); iV0++) {
165 AliESDv0* esdV0 = fESD->GetV0(iV0);
167 //check if mother reconstructed V0 can be associated to a MC V0
168 Int_t labMCV0 = IsMcV0(esdV0) ;
169 if (labMCV0 <0) continue;
171 esdV0->ChangeMassHypothesis(fV0PDG); //important to do that before entering the cut check
173 AliCFPair pair(esdV0,fESD);
174 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartRecCuts,&pair)) continue;
176 //check if associated MC v0 passes the cuts
177 AliMCParticle* mcV0 = fMCEvent->GetTrack(labMCV0);
180 Info("UserExec","is v0 primary : %d",AliCFParticleGenCuts::IsPrimary(mcV0,fMCEvent->Stack()));
182 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartGenCuts,mcV0)) continue;
186 esdV0->GetPxPyPz(mom[0],mom[1],mom[2]);
187 Double_t pt2 = mom[0]*mom[0]+mom[1]*mom[1] ;
188 Double_t pt = TMath::Sqrt(pt2);
189 Double_t energy = TMath::Sqrt(pt2 + mom[2]*mom[2] + TMath::Power(TDatabasePDG::Instance()->GetParticle(fV0PDG)->Mass(),2));
191 containerInput[0] = pt ;
192 containerInput[1] = GetRapidity(energy,mom[2]);
193 fCFManager->GetParticleContainer()->Fill(containerInput,kStepReconstructed) ;
194 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartSelCuts,&pair)) continue ;
195 fCFManager->GetParticleContainer()->Fill(containerInput,kStepSelected);
198 fHistEventsProcessed->Fill(0);
199 /* PostData(0) is taken care of by AliAnalysisTaskSE */
200 PostData(1,fHistEventsProcessed) ;
201 PostData(2,fCFManager->GetParticleContainer()) ;
205 //___________________________________________________________________________
206 void AliCFV0Task::Terminate(Option_t*)
208 // The Terminate() function is the last function to be called during
209 // a query. It always runs on the client, it can be used to present
210 // the results graphically or save the results to file.
212 Info("Terminate","");
213 AliAnalysisTaskSE::Terminate();
216 //draw some example plots....
218 AliCFContainer *cont= dynamic_cast<AliCFContainer*> (GetOutputData(2));
220 TH1D* h00 = cont->ShowProjection(0,0) ;
221 TH1D* h01 = cont->ShowProjection(0,1) ;
222 TH1D* h02 = cont->ShowProjection(0,2) ;
223 TH1D* h03 = cont->ShowProjection(0,3) ;
225 TH1D* h10 = cont->ShowProjection(1,0) ;
226 TH1D* h11 = cont->ShowProjection(1,1) ;
227 TH1D* h12 = cont->ShowProjection(1,2) ;
228 TH1D* h13 = cont->ShowProjection(1,3) ;
230 Double_t max1 = h00->GetMaximum();
231 Double_t max2 = h10->GetMaximum();
233 h00->GetYaxis()->SetRangeUser(0,max1*1.2);
234 h01->GetYaxis()->SetRangeUser(0,max1*1.2);
235 h02->GetYaxis()->SetRangeUser(0,max1*1.2);
236 h03->GetYaxis()->SetRangeUser(0,max1*1.2);
238 h10->GetYaxis()->SetRangeUser(0,max2*1.2);
239 h11->GetYaxis()->SetRangeUser(0,max2*1.2);
240 h12->GetYaxis()->SetRangeUser(0,max2*1.2);
241 h13->GetYaxis()->SetRangeUser(0,max2*1.2);
243 h00->SetMarkerStyle(23) ;
244 h01->SetMarkerStyle(24) ;
245 h02->SetMarkerStyle(25) ;
246 h03->SetMarkerStyle(26) ;
248 h10->SetMarkerStyle(23) ;
249 h11->SetMarkerStyle(24) ;
250 h12->SetMarkerStyle(25) ;
251 h13->SetMarkerStyle(26) ;
253 TCanvas * c =new TCanvas("c","",1400,800);
273 c->SaveAs("plots.eps");
276 //___________________________________________________________________________
277 void AliCFV0Task::UserCreateOutputObjects() {
278 //HERE ONE CAN CREATE OUTPUT OBJECTS, IN PARTICULAR IF THE OBJECT PARAMETERS DON'T NEED
279 //TO BE SET BEFORE THE EXECUTION OF THE TASK
281 Info("UserCreateOutputObjects","CreateOutputObjects of task %s\n", GetName());
285 fHistEventsProcessed = new TH1I("fHistEventsProcessed","",1,0,1) ;
288 //___________________________________________________________________________
289 Int_t AliCFV0Task::GetV0Label(UInt_t lab1, UInt_t lab2) const {
291 // returns the label of the V0, given the labels of the 2 daughter tracks
292 // returns -1 if the V0 is fake
295 AliStack* stack = fMCEvent->Stack();
296 TParticle* part1 = stack->Particle(lab1) ;
297 TParticle* part2 = stack->Particle(lab2) ;
299 Int_t part1MotherLab=part1->GetFirstMother();
300 Int_t part2MotherLab=part2->GetFirstMother();
302 if (part1MotherLab==-1 || part2MotherLab==-1) return -1 ;
303 if (part1MotherLab != part2MotherLab ) return -1 ;
305 if (stack->Particle(part1MotherLab)->GetPdgCode() != fV0PDG ) return -1 ;
309 if ( (part1->GetPdgCode()== -211 && part2->GetPdgCode()== 211) ||
310 (part1->GetPdgCode()== 211 && part2->GetPdgCode()== -211) ) return part1MotherLab ;
313 if ( (part1->GetPdgCode()== -211 && part2->GetPdgCode()== 2212) ||
314 (part1->GetPdgCode()== 2212 && part2->GetPdgCode()== -211) ) return part1MotherLab ;
317 if ( (part1->GetPdgCode()== 211 && part2->GetPdgCode()== -2212) ||
318 (part1->GetPdgCode()== -2212 && part2->GetPdgCode()== 211) ) return part1MotherLab ;
328 //___________________________________________________________________________
329 Double_t AliCFV0Task::GetRapidity(Double_t energy, Double_t pz) {
330 if (energy == pz || energy == -pz) {
331 printf("GetRapidity : ERROR : rapidity for 4-vector with E = Pz -- infinite result");
335 printf("GetRapidity : ERROR : rapidity for 4-vector with E = Pz -- infinite result");
338 Double_t y = 0.5 * log((energy + pz) / (energy - pz));
342 //___________________________________________________________________________
343 Int_t AliCFV0Task::IsMcV0(AliESDv0* v0) const {
345 AliESDEvent* fESD = dynamic_cast<AliESDEvent*>(fInputEvent);
347 Int_t nindex = v0->GetNindex();
348 Int_t pindex = v0->GetPindex();
349 AliESDtrack *nTrack = fESD->GetTrack(nindex) ;
350 AliESDtrack *pTrack = fESD->GetTrack(pindex) ;
352 if (!nTrack || !pTrack) return -1 ;
354 Int_t nlab = nTrack->GetLabel() ;
355 Int_t plab = pTrack->GetLabel() ;
357 if (nlab <0 || plab <0) return -1 ;
359 return GetV0Label((UInt_t)nlab,(UInt_t)plab) ;
363 //___________________________________________________________________________
364 void AliCFV0Task::RebuildV0s(AliESDEvent* fESD) {
368 //These are pp cuts : to change if Pb+Pb !
369 Double_t cuts[]={33, // max. allowed chi2
370 0.01,// min. allowed negative daughter's impact parameter
371 0.01,// min. allowed positive daughter's impact parameter
372 0.5,// max. allowed DCA between the daughter tracks
373 0.98,// max. allowed cosine of V0's pointing angle
374 0.2, // min. radius of the fiducial volume
375 100. // max. radius of the fiducial volume
377 // AliV0vertexer* v0Vertexer = new AliV0vertexer(cuts);
378 // v0Vertexer->SetVertex(primVertexPos);
379 AliV0vertexer* v0Vertexer = new AliV0vertexer();
380 v0Vertexer->SetCuts(cuts) ;
381 v0Vertexer->Tracks2V0vertices(fESD);