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"
44 #include "AliAODEvent.h"
46 #include "AliCFParticleGenCuts.h"
48 #include "TDatabasePDG.h"
50 //__________________________________________________________________________
51 AliCFV0Task::AliCFV0Task() :
56 fHistEventsProcessed(0x0)
62 //___________________________________________________________________________
63 AliCFV0Task::AliCFV0Task(const Char_t* name) :
64 AliAnalysisTaskSE(name),
68 fHistEventsProcessed(0x0)
71 // Constructor. Initialization of Inputs and Outputs
73 Info("AliCFV0Task","Calling Constructor");
75 DefineInput(0) and DefineOutput(0)
76 are taken care of by AliAnalysisTaskSE constructor
78 DefineOutput(1,TH1I::Class());
79 DefineOutput(2,AliCFContainer::Class());
80 // DefineOutput(3,TList::Class());
83 //___________________________________________________________________________
84 AliCFV0Task& AliCFV0Task::operator=(const AliCFV0Task& c)
87 // Assignment operator
90 AliAnalysisTaskSE::operator=(c) ;
91 fRebuildV0s = c.fRebuildV0s;
93 fCFManager = c.fCFManager;
94 fHistEventsProcessed = c.fHistEventsProcessed;
99 //___________________________________________________________________________
100 AliCFV0Task::AliCFV0Task(const AliCFV0Task& c) :
101 AliAnalysisTaskSE(c),
102 fRebuildV0s(c.fRebuildV0s),
104 fCFManager(c.fCFManager),
105 fHistEventsProcessed(c.fHistEventsProcessed)
112 //___________________________________________________________________________
113 AliCFV0Task::~AliCFV0Task() {
117 Info("~AliCFV0Task","Calling Destructor");
118 if (fCFManager) delete fCFManager ;
119 if (fHistEventsProcessed) delete fHistEventsProcessed ;
122 //_________________________________________________
123 void AliCFV0Task::UserExec(Option_t *)
126 // Main loop function
128 Info("UserExec","") ;
131 Error("UserExec","NO EVENT FOUND!");
136 Error("UserExec","NO MC INFO FOUND!");
140 fCFManager->SetMCEventInfo (fMCEvent);
141 fCFManager->SetRecEventInfo(fInputEvent);
143 Bool_t isESDEvent = strcmp(fInputEvent->ClassName(),"AliESDEvent") == 0 ? kTRUE : kFALSE ;
144 Bool_t isAODEvent = strcmp(fInputEvent->ClassName(),"AliAODEvent") == 0 ? kTRUE : kFALSE ;
146 AliESDEvent* fESD = dynamic_cast<AliESDEvent*>(fInputEvent);
147 AliAODEvent* fAOD = dynamic_cast<AliAODEvent*>(fInputEvent);
150 // MC-event selection
151 Double_t containerInput[2] ;
153 //loop on the MC event
154 Info("UserExec","Looping on MC event");
155 for (Int_t ipart=0; ipart<fMCEvent->GetNumberOfTracks(); ipart++) {
156 AliMCParticle *mcPart = (AliMCParticle*)fMCEvent->GetTrack(ipart);
158 //check the MC-level cuts
159 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartGenCuts,mcPart)) continue;
160 containerInput[0] = mcPart->Pt();
161 containerInput[1] = mcPart->Y() ;
162 //fill the container for Gen-level selection
163 fCFManager->GetParticleContainer()->Fill(containerInput,kStepGenerated);
165 //check the Acceptance-level cuts
166 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartAccCuts,mcPart)) continue;
167 //fill the container for Acceptance-level selection
168 fCFManager->GetParticleContainer()->Fill(containerInput,kStepReconstructible);
172 //Now go to rec level
173 Info("UserExec","Looping on %s",fInputEvent->ClassName());
175 if (isESDEvent && fRebuildV0s) RebuildV0s(fESD) ;
177 Info("UserExec","There are %d V0s in event",fInputEvent->GetNumberOfV0s());
179 AliESDv0* esdV0 = 0x0;
180 AliAODv0* aodV0 = 0x0;
181 AliCFPair* pair = 0x0;
184 for (Int_t iV0 = 0; iV0<fInputEvent->GetNumberOfV0s(); iV0++) {
187 esdV0 = fESD->GetV0(iV0);
188 //check if mother reconstructed V0 can be associated to a MC V0
189 labMCV0 = IsMcV0(esdV0);
190 if (labMCV0 <0) continue;
191 pair = new AliCFPair(esdV0,fESD);
193 else if (isAODEvent) {
194 aodV0 = fAOD->GetV0(iV0);
195 labMCV0 = IsMcV0(aodV0);
196 if (labMCV0 <0) continue;
197 pair = new AliCFPair(aodV0);
200 Error("UserExec","Error: input data file is not an ESD nor an AOD");
204 pair->SetV0PDG(fV0PDG);
205 pair->SetLabel(labMCV0);
206 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartRecCuts,pair)) continue;
208 //check if associated MC v0 passes the cuts
209 AliMCParticle* mcV0 = (AliMCParticle*)fMCEvent->GetTrack(labMCV0);
212 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartGenCuts,mcV0)) continue;
215 Double_t pt, rapidity;
219 esdV0->GetPxPyPz(mom[0],mom[1],mom[2]);
220 Double_t pt2 = mom[0]*mom[0]+mom[1]*mom[1] ;
221 pt = TMath::Sqrt(pt2);
222 Double_t energy = TMath::Sqrt(pt2 + mom[2]*mom[2] + TMath::Power(TDatabasePDG::Instance()->GetParticle(fV0PDG)->Mass(),2));
223 rapidity = GetRapidity(energy,mom[2]) ;
227 rapidity = aodV0->Y(fV0PDG);
230 containerInput[0] = pt ;
231 containerInput[1] = rapidity ;
232 fCFManager->GetParticleContainer()->Fill(containerInput,kStepReconstructed) ;
233 if (!fCFManager->CheckParticleCuts(AliCFManager::kPartSelCuts,pair)) continue ;
234 fCFManager->GetParticleContainer()->Fill(containerInput,kStepSelected);
239 fHistEventsProcessed->Fill(0);
240 /* PostData(0) is taken care of by AliAnalysisTaskSE */
241 PostData(1,fHistEventsProcessed) ;
242 PostData(2,fCFManager->GetParticleContainer()) ;
246 //___________________________________________________________________________
247 void AliCFV0Task::Terminate(Option_t*)
249 // The Terminate() function is the last function to be called during
250 // a query. It always runs on the client, it can be used to present
251 // the results graphically or save the results to file.
253 Info("Terminate","");
254 AliAnalysisTaskSE::Terminate();
257 //draw some example plots....
259 AliCFContainer *cont= dynamic_cast<AliCFContainer*> (GetOutputData(2));
261 TH1D* h00 = cont->ShowProjection(0,0) ;
262 TH1D* h01 = cont->ShowProjection(0,1) ;
263 TH1D* h02 = cont->ShowProjection(0,2) ;
264 TH1D* h03 = cont->ShowProjection(0,3) ;
266 TH1D* h10 = cont->ShowProjection(1,0) ;
267 TH1D* h11 = cont->ShowProjection(1,1) ;
268 TH1D* h12 = cont->ShowProjection(1,2) ;
269 TH1D* h13 = cont->ShowProjection(1,3) ;
271 Double_t max1 = h00->GetMaximum();
272 Double_t max2 = h10->GetMaximum();
274 h00->GetYaxis()->SetRangeUser(0,max1*1.2);
275 h01->GetYaxis()->SetRangeUser(0,max1*1.2);
276 h02->GetYaxis()->SetRangeUser(0,max1*1.2);
277 h03->GetYaxis()->SetRangeUser(0,max1*1.2);
279 h10->GetYaxis()->SetRangeUser(0,max2*1.2);
280 h11->GetYaxis()->SetRangeUser(0,max2*1.2);
281 h12->GetYaxis()->SetRangeUser(0,max2*1.2);
282 h13->GetYaxis()->SetRangeUser(0,max2*1.2);
284 h00->SetMarkerStyle(23) ;
285 h01->SetMarkerStyle(24) ;
286 h02->SetMarkerStyle(25) ;
287 h03->SetMarkerStyle(26) ;
289 h10->SetMarkerStyle(23) ;
290 h11->SetMarkerStyle(24) ;
291 h12->SetMarkerStyle(25) ;
292 h13->SetMarkerStyle(26) ;
294 TCanvas * c =new TCanvas("c","",1400,800);
314 c->SaveAs("plots.eps");
317 //___________________________________________________________________________
318 void AliCFV0Task::UserCreateOutputObjects() {
319 //HERE ONE CAN CREATE OUTPUT OBJECTS, IN PARTICULAR IF THE OBJECT PARAMETERS DON'T NEED
320 //TO BE SET BEFORE THE EXECUTION OF THE TASK
322 Info("UserCreateOutputObjects","CreateOutputObjects of task %s\n", GetName());
326 fHistEventsProcessed = new TH1I("fHistEventsProcessed","",1,0,1) ;
329 //___________________________________________________________________________
330 Int_t AliCFV0Task::GetV0Label(UInt_t lab1, UInt_t lab2) const {
332 // returns the label of the V0, given the labels of the 2 daughter tracks
333 // returns -1 if the V0 is fake
336 AliStack* stack = fMCEvent->Stack();
337 TParticle* part1 = stack->Particle(lab1) ;
338 TParticle* part2 = stack->Particle(lab2) ;
340 Int_t part1MotherLab=part1->GetFirstMother();
341 Int_t part2MotherLab=part2->GetFirstMother();
343 if (part1MotherLab==-1 || part2MotherLab==-1) return -1 ;
344 if (part1MotherLab != part2MotherLab ) return -1 ;
346 if (stack->Particle(part1MotherLab)->GetPdgCode() != fV0PDG ) return -1 ;
350 if ( (part1->GetPdgCode()== -211 && part2->GetPdgCode()== 211) ||
351 (part1->GetPdgCode()== 211 && part2->GetPdgCode()== -211) ) return part1MotherLab ;
354 if ( (part1->GetPdgCode()== -211 && part2->GetPdgCode()== 2212) ||
355 (part1->GetPdgCode()== 2212 && part2->GetPdgCode()== -211) ) return part1MotherLab ;
358 if ( (part1->GetPdgCode()== 211 && part2->GetPdgCode()== -2212) ||
359 (part1->GetPdgCode()== -2212 && part2->GetPdgCode()== 211) ) return part1MotherLab ;
369 //___________________________________________________________________________
370 Double_t AliCFV0Task::GetRapidity(Double_t energy, Double_t pz) {
372 // calculates rapidity, checking energy is larger than pz, otherwise returns 999.
375 if (energy == pz || energy == -pz) {
376 printf("GetRapidity : ERROR : rapidity for 4-vector with E = Pz -- infinite result");
380 printf("GetRapidity : ERROR : rapidity for 4-vector with E = Pz -- infinite result");
383 Double_t y = 0.5 * log((energy + pz) / (energy - pz));
387 //___________________________________________________________________________
388 Int_t AliCFV0Task::IsMcV0(AliESDv0* v0) const {
390 // check if the passed V0 is associated to a MC one,
391 // and returns the corresponding geant label.
392 // returns -1 if the V0 is fake (i.e. label<0).
395 AliESDEvent* fESD = dynamic_cast<AliESDEvent*>(fInputEvent);
397 Int_t nindex = v0->GetNindex();
398 Int_t pindex = v0->GetPindex();
399 AliESDtrack *nTrack = fESD->GetTrack(nindex) ;
400 AliESDtrack *pTrack = fESD->GetTrack(pindex) ;
402 if (!nTrack || !pTrack) return -1 ;
404 Int_t nlab = nTrack->GetLabel() ;
405 Int_t plab = pTrack->GetLabel() ;
407 if (nlab <0 || plab <0) return -1 ;
409 return GetV0Label((UInt_t)nlab,(UInt_t)plab) ;
412 //___________________________________________________________________________
413 Int_t AliCFV0Task::IsMcV0(AliAODv0* v0) const {
415 // check if the passed V0 is associated to a MC one,
416 // and returns the corresponding geant label.
417 // returns -1 if the V0 is fake (i.e. label<0).
420 AliAODVertex * vtx = v0->GetSecondaryVtx();
422 AliAODTrack *nTrack = (AliAODTrack*)vtx->GetDaughter(1); //neg is filled after pos in AliAnalysisTaskStrange
423 AliAODTrack *pTrack = (AliAODTrack*)vtx->GetDaughter(0);
425 if (!nTrack || !pTrack) return -1 ;
427 Int_t nlab = nTrack->GetLabel() ;
428 Int_t plab = pTrack->GetLabel() ;
430 if (nlab <0 || plab <0) return -1 ;
432 return GetV0Label((UInt_t)nlab,(UInt_t)plab) ;
436 //___________________________________________________________________________
437 void AliCFV0Task::RebuildV0s(AliESDEvent* fESD) {
441 //These are pp cuts : to change if Pb+Pb !
442 Double_t cuts[]={33, // max. allowed chi2
443 0.01,// min. allowed negative daughter's impact parameter
444 0.01,// min. allowed positive daughter's impact parameter
445 0.5,// max. allowed DCA between the daughter tracks
446 0.98,// max. allowed cosine of V0's pointing angle
447 0.2, // min. radius of the fiducial volume
448 100. // max. radius of the fiducial volume
450 // AliV0vertexer* v0Vertexer = new AliV0vertexer(cuts);
451 // v0Vertexer->SetVertex(primVertexPos);
452 AliV0vertexer* v0Vertexer = new AliV0vertexer();
453 v0Vertexer->SetCuts(cuts) ;
454 v0Vertexer->Tracks2V0vertices(fESD);