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->Y() ;
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 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartGenCuts,mcV0)) continue;
184 esdV0->GetPxPyPz(mom[0],mom[1],mom[2]);
185 Double_t pt2 = mom[0]*mom[0]+mom[1]*mom[1] ;
186 Double_t pt = TMath::Sqrt(pt2);
187 Double_t energy = TMath::Sqrt(pt2 + mom[2]*mom[2] + TMath::Power(TDatabasePDG::Instance()->GetParticle(fV0PDG)->Mass(),2));
189 containerInput[0] = pt ;
190 containerInput[1] = GetRapidity(energy,mom[2]);
191 fCFManager->GetParticleContainer()->Fill(containerInput,kStepReconstructed) ;
192 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartSelCuts,&pair)) continue ;
193 fCFManager->GetParticleContainer()->Fill(containerInput,kStepSelected);
196 fHistEventsProcessed->Fill(0);
197 /* PostData(0) is taken care of by AliAnalysisTaskSE */
198 PostData(1,fHistEventsProcessed) ;
199 PostData(2,fCFManager->GetParticleContainer()) ;
203 //___________________________________________________________________________
204 void AliCFV0Task::Terminate(Option_t*)
206 // The Terminate() function is the last function to be called during
207 // a query. It always runs on the client, it can be used to present
208 // the results graphically or save the results to file.
210 Info("Terminate","");
211 AliAnalysisTaskSE::Terminate();
214 //draw some example plots....
216 AliCFContainer *cont= dynamic_cast<AliCFContainer*> (GetOutputData(2));
218 TH1D* h00 = cont->ShowProjection(0,0) ;
219 TH1D* h01 = cont->ShowProjection(0,1) ;
220 TH1D* h02 = cont->ShowProjection(0,2) ;
221 TH1D* h03 = cont->ShowProjection(0,3) ;
223 TH1D* h10 = cont->ShowProjection(1,0) ;
224 TH1D* h11 = cont->ShowProjection(1,1) ;
225 TH1D* h12 = cont->ShowProjection(1,2) ;
226 TH1D* h13 = cont->ShowProjection(1,3) ;
228 Double_t max1 = h00->GetMaximum();
229 Double_t max2 = h10->GetMaximum();
231 h00->GetYaxis()->SetRangeUser(0,max1*1.2);
232 h01->GetYaxis()->SetRangeUser(0,max1*1.2);
233 h02->GetYaxis()->SetRangeUser(0,max1*1.2);
234 h03->GetYaxis()->SetRangeUser(0,max1*1.2);
236 h10->GetYaxis()->SetRangeUser(0,max2*1.2);
237 h11->GetYaxis()->SetRangeUser(0,max2*1.2);
238 h12->GetYaxis()->SetRangeUser(0,max2*1.2);
239 h13->GetYaxis()->SetRangeUser(0,max2*1.2);
241 h00->SetMarkerStyle(23) ;
242 h01->SetMarkerStyle(24) ;
243 h02->SetMarkerStyle(25) ;
244 h03->SetMarkerStyle(26) ;
246 h10->SetMarkerStyle(23) ;
247 h11->SetMarkerStyle(24) ;
248 h12->SetMarkerStyle(25) ;
249 h13->SetMarkerStyle(26) ;
251 TCanvas * c =new TCanvas("c","",1400,800);
271 c->SaveAs("plots.eps");
274 //___________________________________________________________________________
275 void AliCFV0Task::UserCreateOutputObjects() {
276 //HERE ONE CAN CREATE OUTPUT OBJECTS, IN PARTICULAR IF THE OBJECT PARAMETERS DON'T NEED
277 //TO BE SET BEFORE THE EXECUTION OF THE TASK
279 Info("UserCreateOutputObjects","CreateOutputObjects of task %s\n", GetName());
283 fHistEventsProcessed = new TH1I("fHistEventsProcessed","",1,0,1) ;
286 //___________________________________________________________________________
287 Int_t AliCFV0Task::GetV0Label(UInt_t lab1, UInt_t lab2) const {
289 // returns the label of the V0, given the labels of the 2 daughter tracks
290 // returns -1 if the V0 is fake
293 AliStack* stack = fMCEvent->Stack();
294 TParticle* part1 = stack->Particle(lab1) ;
295 TParticle* part2 = stack->Particle(lab2) ;
297 Int_t part1MotherLab=part1->GetFirstMother();
298 Int_t part2MotherLab=part2->GetFirstMother();
300 if (part1MotherLab==-1 || part2MotherLab==-1) return -1 ;
301 if (part1MotherLab != part2MotherLab ) return -1 ;
303 if (stack->Particle(part1MotherLab)->GetPdgCode() != fV0PDG ) return -1 ;
307 if ( (part1->GetPdgCode()== -211 && part2->GetPdgCode()== 211) ||
308 (part1->GetPdgCode()== 211 && part2->GetPdgCode()== -211) ) return part1MotherLab ;
311 if ( (part1->GetPdgCode()== -211 && part2->GetPdgCode()== 2212) ||
312 (part1->GetPdgCode()== 2212 && part2->GetPdgCode()== -211) ) return part1MotherLab ;
315 if ( (part1->GetPdgCode()== 211 && part2->GetPdgCode()== -2212) ||
316 (part1->GetPdgCode()== -2212 && part2->GetPdgCode()== 211) ) return part1MotherLab ;
326 //___________________________________________________________________________
327 Double_t AliCFV0Task::GetRapidity(Double_t energy, Double_t pz) {
328 if (energy == pz || energy == -pz) {
329 printf("GetRapidity : ERROR : rapidity for 4-vector with E = Pz -- infinite result");
333 printf("GetRapidity : ERROR : rapidity for 4-vector with E = Pz -- infinite result");
336 Double_t y = 0.5 * log((energy + pz) / (energy - pz));
340 //___________________________________________________________________________
341 Int_t AliCFV0Task::IsMcV0(AliESDv0* v0) const {
343 AliESDEvent* fESD = dynamic_cast<AliESDEvent*>(fInputEvent);
345 Int_t nindex = v0->GetNindex();
346 Int_t pindex = v0->GetPindex();
347 AliESDtrack *nTrack = fESD->GetTrack(nindex) ;
348 AliESDtrack *pTrack = fESD->GetTrack(pindex) ;
350 if (!nTrack || !pTrack) return -1 ;
352 Int_t nlab = nTrack->GetLabel() ;
353 Int_t plab = pTrack->GetLabel() ;
355 if (nlab <0 || plab <0) return -1 ;
357 return GetV0Label((UInt_t)nlab,(UInt_t)plab) ;
361 //___________________________________________________________________________
362 void AliCFV0Task::RebuildV0s(AliESDEvent* fESD) {
366 //These are pp cuts : to change if Pb+Pb !
367 Double_t cuts[]={33, // max. allowed chi2
368 0.01,// min. allowed negative daughter's impact parameter
369 0.01,// min. allowed positive daughter's impact parameter
370 0.5,// max. allowed DCA between the daughter tracks
371 0.98,// max. allowed cosine of V0's pointing angle
372 0.2, // min. radius of the fiducial volume
373 100. // max. radius of the fiducial volume
375 // AliV0vertexer* v0Vertexer = new AliV0vertexer(cuts);
376 // v0Vertexer->SetVertex(primVertexPos);
377 AliV0vertexer* v0Vertexer = new AliV0vertexer();
378 v0Vertexer->SetCuts(cuts) ;
379 v0Vertexer->Tracks2V0vertices(fESD);