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1 /**************************************************************************
2  * Copyright(c) 1998-2009, 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 //-----------------------------------------------------------------
17 //         AliAnalysisTaskSpectraBoth class
18 //-----------------------------------------------------------------
19
20 #include "TChain.h"
21 #include "TTree.h"
22 #include "TLegend.h"
23 #include "TH1F.h"
24 #include "TH2F.h"
25 #include "TH3F.h"
26 #include "TCanvas.h"
27 #include "AliAnalysisTask.h"
28 #include "AliAnalysisManager.h"
29 #include "AliAODTrack.h"
30 #include "AliAODMCParticle.h"
31 #include "AliVParticle.h"
32 #include "AliAODEvent.h"
33 #include "AliAODInputHandler.h"
34 #include "AliAnalysisTaskSpectraBoth.h"
35 #include "AliAnalysisTaskESDfilter.h"
36 #include "AliAnalysisDataContainer.h"
37 #include "AliSpectraBothHistoManager.h"
38 #include "AliSpectraBothTrackCuts.h"
39 #include "AliSpectraBothEventCuts.h"
40 #include "AliCentrality.h"
41 #include "TProof.h"
42 #include "AliPID.h"
43 #include "AliVEvent.h"
44 #include "AliESDEvent.h"
45 #include "AliPIDResponse.h"
46 #include "AliStack.h"
47 #include "AliSpectraBothPID.h"
48 #include "AliGenEventHeader.h"  
49 #include <TMCProcess.h>
50
51 #include <iostream>
52
53
54
55
56 using namespace AliSpectraNameSpaceBoth;
57 using namespace std;
58
59 ClassImp(AliAnalysisTaskSpectraBoth)
60
61 //________________________________________________________________________
62 AliAnalysisTaskSpectraBoth::AliAnalysisTaskSpectraBoth(const char *name) : AliAnalysisTaskSE(name), fAOD(0), fHistMan(0), fTrackCuts(0), fEventCuts(0),  fPID(0), fIsMC(0), fNRebin(0),fUseMinSigma(0),fCuts(0),fdotheMCLoopAfterEventCuts(0),fmakePIDQAhisto(1),fMotherWDPDGcode(-1)
63
64 {
65   // Default constructor
66   
67   DefineInput(0, TChain::Class());
68   DefineOutput(1, AliSpectraBothHistoManager::Class());
69   DefineOutput(2, AliSpectraBothEventCuts::Class());
70   DefineOutput(3, AliSpectraBothTrackCuts::Class());
71   DefineOutput(4, AliSpectraBothPID::Class());
72   fNRebin=0;
73   
74 }
75 //________________________________________________________________________
76 //________________________________________________________________________
77 void AliAnalysisTaskSpectraBoth::UserCreateOutputObjects()
78 {
79   // create output objects
80   fHistMan = new AliSpectraBothHistoManager("SpectraHistos",fNRebin,fmakePIDQAhisto);
81
82   if (!fTrackCuts) AliFatal("Track Cuts should be set in the steering macro");
83   if (!fEventCuts) AliFatal("Event Cuts should be set in the steering macro");
84   if (!fPID)       AliFatal("PID object should be set in the steering macro");
85   fTrackCuts->SetAliESDtrackCuts(fCuts);
86   fEventCuts->InitHisto();
87   fTrackCuts->InitHisto();
88
89   PostData(1, fHistMan  );
90   PostData(2, fEventCuts);
91   PostData(3, fTrackCuts);
92   PostData(4, fPID      );
93 }
94 //________________________________________________________________________
95 void AliAnalysisTaskSpectraBoth::UserExec(Option_t *)
96 {
97   // main event loop
98         Int_t ifAODEvent=AliSpectraBothTrackCuts::kotherobject;
99         fAOD = dynamic_cast<AliVEvent*>(InputEvent());
100   //    AliESDEvent* esdevent=0x0;
101  //     AliAODEvent* aodevent=0x0;
102    
103         TString nameoftrack(fAOD->ClassName());  
104         if(!nameoftrack.CompareTo("AliESDEvent"))
105         {
106                 ifAODEvent=AliSpectraBothTrackCuts::kESDobject;
107                 //esdevent=dynamic_cast<AliESDEvent*>(fAOD);
108         }
109         else if(!nameoftrack.CompareTo("AliAODEvent"))
110         {
111                 ifAODEvent=AliSpectraBothTrackCuts::kAODobject;
112                 //aodevent=dynamic_cast<AliAODEvent*>(fAOD);
113         }
114         else
115                 AliFatal("Not processing AODs or ESDS") ;
116         if(fIsMC)
117         {               
118                 if(!fEventCuts->CheckMCProcessType(MCEvent()))
119                         return ;                
120         }
121
122
123         if(fdotheMCLoopAfterEventCuts)
124                 if(!fEventCuts->IsSelected(fAOD,fTrackCuts,fIsMC,-100,fHistMan->GetEventStatHist()))
125                         return;//event selection
126         TClonesArray *arrayMC = 0;
127         Int_t npar=0;
128         AliStack* stack=0x0;
129          Double_t mcZ=-100;
130
131         if (fIsMC)
132         {
133                 TArrayF mcVertex(3);
134                 mcVertex[0]=9999.; mcVertex[1]=9999.; mcVertex[2]=9999.;
135                 AliMCEvent* mcEvent=(AliMCEvent*)MCEvent();
136                 if (!mcEvent) 
137                 {
138                         AliFatal("Error: MC particles branch not found!\n");
139                 }
140                 AliHeader* header = mcEvent->Header();
141                 if (!header) 
142                 {
143                         AliDebug(AliLog::kError, "Header not available");
144                         return;
145                 }
146         
147                 AliGenEventHeader* genHeader = header->GenEventHeader();
148                 if(genHeader)
149                 {
150                         genHeader->PrimaryVertex(mcVertex);
151                         mcZ=mcVertex[2];
152                 }
153                   if(ifAODEvent==AliSpectraBothTrackCuts::kAODobject)
154                   {
155                           arrayMC = (TClonesArray*) fAOD->GetList()->FindObject(AliAODMCParticle::StdBranchName());
156                           if (!arrayMC) 
157                           {
158                                         AliFatal("Error: MC particles branch not found!\n");
159                           }
160                           Int_t nMC = arrayMC->GetEntries();
161                           for (Int_t iMC = 0; iMC < nMC; iMC++)
162                           {
163                                   AliAODMCParticle *partMC = (AliAODMCParticle*) arrayMC->At(iMC);
164                                   if(!partMC->Charge()) continue;//Skip neutrals
165                                   //if(partMC->Eta() > fTrackCuts->GetEtaMin() && partMC->Eta() < fTrackCuts->GetEtaMax()){//charged hadron are filled inside the eta acceptance
166                                   //Printf("%f     %f-%f",partMC->Eta(),fTrackCuts->GetEtaMin(),fTrackCuts->GetEtaMax());
167                                   if(partMC->Eta() > fTrackCuts->GetEtaMin() && partMC->Eta() < fTrackCuts->GetEtaMax())
168                                                 fHistMan->GetPtHistogram(kHistPtGen)->Fill(partMC->Pt(),partMC->IsPhysicalPrimary());                                                                    
169                                   //rapidity cut
170                                   if(partMC->Y() > fTrackCuts->GetYMax()|| partMC->Y() < fTrackCuts->GetYMin() ) 
171                                         continue;       
172                                   if(partMC->IsPhysicalPrimary())
173                                          npar++;    
174                                   // check for true PID + and fill P_t histos 
175                                   Int_t charge = partMC->Charge() > 0 ? kChPos : kChNeg ;
176                                   Int_t id = fPID->GetParticleSpecie(partMC);
177                                   if(id != kSpUndefined) 
178                                   {
179                                         fHistMan->GetHistogram2D(kHistPtGenTruePrimary,id,charge)->Fill(partMC->Pt(),partMC->IsPhysicalPrimary());
180                                   }
181                           }
182                   }
183                   if(ifAODEvent==AliSpectraBothTrackCuts::kESDobject)
184                   {
185                         stack = mcEvent->Stack();
186                         Int_t nMC = stack->GetNtrack();
187                         for (Int_t iMC = 0; iMC < nMC; iMC++)
188                         {
189                                  
190                                 TParticle *partMC = stack->Particle(iMC);
191                                 
192                                 if(!partMC)     
193                                         continue;       
194         
195                                 if(!partMC->GetPDG(0))
196                                         continue;
197                                 if(TMath::Abs(partMC->GetPDG(0)->Charge()/3.0)<0.01) 
198                                         continue;//Skip neutrals
199                                 if(partMC->Eta() > fTrackCuts->GetEtaMin() && partMC->Eta() < fTrackCuts->GetEtaMax())
200                                         fHistMan->GetPtHistogram(kHistPtGen)->Fill(partMC->Pt(),stack->IsPhysicalPrimary(iMC));
201                                 if(partMC->Y()   > fTrackCuts->GetYMax() ||partMC->Y()   < fTrackCuts->GetYMin()  ) 
202                                         continue;
203                                 if(stack->IsPhysicalPrimary(iMC))
204                                          npar++;    
205                                   // check for true PID + and fill P_t histos 
206                                 Int_t charge = partMC->GetPDG(0)->Charge()/3.0 > 0 ? kChPos : kChNeg ;
207                                 Int_t id = fPID->GetParticleSpecie(partMC);
208                                 if(id != kSpUndefined) 
209                                 {
210                                         fHistMan->GetHistogram2D(kHistPtGenTruePrimary,id,charge)->Fill(partMC->Pt(),stack->IsPhysicalPrimary(iMC));
211                                 }
212                           }
213                   }
214         }
215         if(!fdotheMCLoopAfterEventCuts)
216                 if(!fEventCuts->IsSelected(fAOD,fTrackCuts,fIsMC,mcZ,fHistMan->GetEventStatHist()))
217                         return;//event selection
218         //main loop on tracks
219         Int_t ntracks=0;
220         //cout<<fAOD->GetNumberOfTracks()<<endl;
221         for (Int_t iTracks = 0; iTracks < fAOD->GetNumberOfTracks(); iTracks++) 
222         {
223                 AliVTrack* track = dynamic_cast<AliVTrack*>(fAOD->GetTrack(iTracks));
224                 AliAODTrack* aodtrack=0;
225                 AliESDtrack* esdtrack=0;
226                 Float_t dca=-999.;
227                 Float_t dcaz=-999.;
228                 Short_t ncls=-1; 
229                 Float_t chi2perndf=-1.0;
230                 if(ifAODEvent==AliSpectraBothTrackCuts::kESDobject)
231                 {
232                         esdtrack=dynamic_cast<AliESDtrack*>(track);
233                         if(!esdtrack)
234                                 continue;
235                         esdtrack->GetImpactParameters(dca,dcaz);
236                         ncls=esdtrack->GetTPCNcls();
237                         if ( ncls > 5) 
238                                 chi2perndf=(esdtrack->GetTPCchi2()/Float_t(ncls - 5));
239   
240                         else 
241                                 chi2perndf=-1;
242                         
243                 }
244                 else if (ifAODEvent==AliSpectraBothTrackCuts::kAODobject)
245                 {
246                         aodtrack=dynamic_cast<AliAODTrack*>(track);
247                         if(!aodtrack)
248                                 continue;               
249                         dca=aodtrack->DCA();
250                         dcaz=aodtrack->ZAtDCA();
251                         ncls=aodtrack->GetTPCNcls();
252                         chi2perndf=aodtrack->Chi2perNDF();
253                 }
254                 else
255                         continue;
256                 if (!fTrackCuts->IsSelected(track,kTRUE)) 
257                         continue;       
258                         
259                 ntracks++;
260                 if(fmakePIDQAhisto)
261                         fPID->FillQAHistos(fHistMan, track, fTrackCuts);
262                 
263                 //calculate DCA for AOD track
264                 if(dca==-999.)
265                 {// track->DCA() does not work in old AOD production
266                         Double_t d[2], covd[3];
267                         AliVTrack* track_clone=(AliVTrack*)track->Clone("track_clone"); // need to clone because PropagateToDCA updates the track parameters
268                         Bool_t isDCA = track_clone->PropagateToDCA(fAOD->GetPrimaryVertex(),fAOD->GetMagneticField(),9999.,d,covd);
269                         delete track_clone;
270                         if(!isDCA)
271                                 d[0]=-999.;
272                         dca=d[0];
273                         dcaz=d[1];      
274                 }
275         
276                 fHistMan->GetPtHistogram(kHistPtRec)->Fill(track->Pt(),dca);  // PT histo
277                 // get identity and charge
278                 Bool_t rec[3]={false,false,false};
279                 Bool_t sel[3]={false,false,false};
280                 Int_t idRec  = fPID->GetParticleSpecie(fHistMan,track, fTrackCuts,rec);
281                 for(int irec=kSpPion;irec<kNSpecies;irec++)
282                 {
283    
284                         if(fUseMinSigma)
285                         {
286                                 if(irec>kSpPion)
287                                         break;
288                         }
289                         else
290                         {       
291                                 if(!rec[irec]) 
292                                         idRec = kSpUndefined;
293                                 else    
294                                         idRec=irec;
295                         }               
296    
297                         Int_t charge = track->Charge() > 0 ? kChPos : kChNeg;
298                 
299                         // Fill histograms, only if inside y and nsigma acceptance
300                         if(idRec != kSpUndefined && fTrackCuts->CheckYCut ((BothParticleSpecies_t)idRec))
301                         {
302                                 fHistMan->GetHistogram2D(kHistPtRecSigma,idRec,charge)->Fill(track->Pt(),dca);
303                                 if(fTrackCuts->GetMakeQAhisto())
304                                 { 
305                                         fTrackCuts->GetHistoDCAzQA()->Fill(idRec,track->Pt(),dcaz);
306                                         fTrackCuts->GetHistoNclustersQA()->Fill(idRec,track->Pt(),ncls);
307                                         fTrackCuts->GetHistochi2perNDFQA()->Fill(idRec,track->Pt(),chi2perndf);
308                                 }
309                                 sel[idRec]=true;
310                         }
311                         //can't put a continue because we still have to fill allcharged primaries, done later
312                 
313                         /* MC Part */
314                         if (arrayMC||stack) 
315                         {
316                                 Bool_t isPrimary           = kFALSE;
317                                 Bool_t isSecondaryMaterial = kFALSE; 
318                                 Bool_t isSecondaryWeak     = kFALSE; 
319                                 Int_t idGen     =kSpUndefined;
320                                 Int_t pdgcode=0;
321                                 Int_t motherpdg=-1;
322                                 if (ifAODEvent==AliSpectraBothTrackCuts::kAODobject)
323                                 {
324                                         AliAODMCParticle *partMC = (AliAODMCParticle*) arrayMC->At(TMath::Abs(track->GetLabel()));
325                                         if (!partMC) 
326                                         { 
327                                                 AliError("Cannot get MC particle");
328                                                 continue; 
329                                         }
330                                         // Check if it is primary, secondary from material or secondary from weak decay
331                                         isPrimary           = partMC->IsPhysicalPrimary();
332                                         isSecondaryWeak     = partMC->IsSecondaryFromWeakDecay();
333                                         isSecondaryMaterial      = partMC->IsSecondaryFromMaterial();
334                                         //cout<<"AOD tagging "<<isPrimary<<" "<<isSecondaryWeak<<isSecondaryMaterial<<" "<<partMC->GetMCProcessCode()<<endl;
335
336                                         if(!isPrimary&&!isSecondaryWeak&&!isSecondaryMaterial)//old tagging for old AODs 
337                                         {
338                                                 AliError("old tagging");
339                                                 Int_t mfl=-999,codemoth=-999;
340                                                 Int_t indexMoth=partMC->GetMother(); // FIXME ignore fakes? TO BE CHECKED, on ESD is GetFirstMother()
341                                                 if(indexMoth>=0)
342                                                 {//is not fake
343                                                         AliAODMCParticle* moth = (AliAODMCParticle*) arrayMC->At(indexMoth);
344                                                         codemoth = TMath::Abs(moth->GetPdgCode());
345                                                         mfl = Int_t (codemoth/ TMath::Power(10, Int_t(TMath::Log10(codemoth))));
346                                                 }
347                                                 //Int_t uniqueID = partMC->GetUniqueID();
348                                                 //cout<<"uniqueID: "<<partMC->GetUniqueID()<<"       "<<kPDecay<<endl;
349                                                 //cout<<"status: "<<partMC->GetStatus()<<"       "<<kPDecay<<endl;
350                                                 // if(uniqueID == kPDecay)Printf("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
351                                                 if(mfl==3) 
352                                                         isSecondaryWeak     = kTRUE; // add if(partMC->GetStatus() & kPDecay)? FIXME
353                                                 else       
354                                                         isSecondaryMaterial = kTRUE;
355                                         }
356                                         //cout<<"AOD 2 tagging "<<isPrimary<<" "<<isSecondaryWeak<<isSecondaryMaterial<<" "<<partMC->GetMCProcessCode()<<endl;
357                                         if(isSecondaryWeak)
358                                         {       
359                                                 Int_t indexMoth=partMC->GetMother(); // FIXME ignore fakes? TO BE CHECKED, on ESD is GetFirstMother()
360                                                 if(indexMoth>=0)
361                                                 {
362                                                         AliAODMCParticle* moth = (AliAODMCParticle*) arrayMC->At(indexMoth);
363                                                         if(moth)
364                                                                 motherpdg=TMath::Abs(moth->GetPdgCode());
365                                                 }
366                                         }
367
368                                         idGen     = fPID->GetParticleSpecie(partMC);
369                                         pdgcode=partMC->GetPdgCode(); 
370                                 }
371                                 else if (ifAODEvent==AliSpectraBothTrackCuts::kESDobject)
372                                 {
373                                         TParticle *partMC =stack->Particle(TMath::Abs(track->GetLabel()));
374                                         if (!partMC) 
375                                         { 
376                                                 AliError("Cannot get MC particle");
377                                                 continue; 
378                                         }
379                                         isPrimary           = stack->IsPhysicalPrimary(TMath::Abs(track->GetLabel()));
380                                         isSecondaryWeak     = stack->IsSecondaryFromWeakDecay(TMath::Abs(track->GetLabel()));
381                                         isSecondaryMaterial      = stack->IsSecondaryFromMaterial(TMath::Abs(track->GetLabel()));
382                                         //cout<<"ESD tagging "<<isPrimary<<" "<<isSecondaryWeak<<isSecondaryMaterial<<endl;
383                                         
384                                         if(isSecondaryWeak)     
385                                         {
386
387                                                 TParticle* moth=stack->Particle(TMath::Abs(partMC->GetFirstMother()));
388                                                 if(moth)
389                                                          motherpdg = TMath::Abs(moth->GetPdgCode());
390
391                                         }
392                                         
393
394                                         idGen     = fPID->GetParticleSpecie(partMC);
395                                         pdgcode=partMC->GetPdgCode(); 
396                                 }
397                                 else
398                                         return;
399                         
400                         //        cout<<isPrimary<<" "<<isSecondaryWeak<<" "<<isSecondaryMaterial<<endl;
401                         //        cout<<" functions "<<partMC->IsPhysicalPrimary()<<" "<<partMC->IsSecondaryFromWeakDecay()<<" "<<partMC->IsSecondaryFromMaterial()<<endl;
402                   
403                                 if (isPrimary&&irec==kSpPion)
404                                         fHistMan->GetPtHistogram(kHistPtRecPrimaryAll)->Fill(track->Pt(),dca);  // PT histo of reconstrutsed primaries in defined eta
405                   
406                         //nsigma cut (reconstructed nsigma)
407                                 if(idRec == kSpUndefined) 
408                                         continue;
409                   
410                         // rapidity cut (reconstructed pt and identity)
411                                  if(!fTrackCuts->CheckYCut ((BothParticleSpecies_t)idRec)) continue;
412                   
413                   // Get true ID
414                                         
415                   
416                                  if (idRec == idGen) fHistMan->GetHistogram2D(kHistPtRecTrue,  idGen, charge)->Fill(track->Pt(),dca); 
417                   
418                                 if (isPrimary) 
419                                 {
420                                         fHistMan->GetHistogram2D(kHistPtRecSigmaPrimary, idRec, charge)->Fill(track->Pt(),dca); 
421                                         if(idGen != kSpUndefined) 
422                                         {
423                                                 fHistMan->GetHistogram2D(kHistPtRecPrimary,      idGen, charge)->Fill(track->Pt(),dca);
424                                                 if (idRec == idGen) 
425                                                         fHistMan->GetHistogram2D(kHistPtRecTruePrimary,  idGen, charge)->Fill(track->Pt(),dca); 
426                                         }
427                                 }
428                                  //25th Apr - Muons are added to Pions -- FIXME
429                                 if ( pdgcode == 13 && idRec == kSpPion) 
430                                 { 
431                                         fHistMan->GetPtHistogram(kHistPtRecTrueMuonPlus)->Fill(track->Pt(),dca); 
432                                         if(isPrimary)
433                                                 fHistMan->GetPtHistogram(kHistPtRecTruePrimaryMuonPlus)->Fill(track->Pt(),dca); 
434                                 }
435                                 if ( pdgcode == -13 && idRec == kSpPion) 
436                                 { 
437                                         fHistMan->GetPtHistogram(kHistPtRecTrueMuonMinus)->Fill(track->Pt(),dca); 
438                                         if (isPrimary) 
439                                         {
440                                                 fHistMan->GetPtHistogram(kHistPtRecTruePrimaryMuonMinus)->Fill(track->Pt(),dca); 
441                                         }
442                                 }
443                   
444                                  ///..... END FIXME
445                   
446                                 // Fill secondaries
447                                 if(isSecondaryWeak)
448                                 {  
449                                         if(fMotherWDPDGcode>0)
450                                         {
451                                                 if(motherpdg==fMotherWDPDGcode)
452                                                         fHistMan->GetHistogram2D(kHistPtRecSigmaSecondaryWeakDecay, idRec, charge)->Fill(track->Pt(),dca);
453                                         }       
454                                         else    
455                                                 fHistMan->GetHistogram2D(kHistPtRecSigmaSecondaryWeakDecay, idRec, charge)->Fill(track->Pt(),dca);
456                                 }
457                                 if(isSecondaryMaterial)  
458                                         fHistMan->GetHistogram2D(kHistPtRecSigmaSecondaryMaterial , idRec, charge)->Fill(track->Pt(),dca);
459                   
460                         }//end if(arrayMC)
461                 }
462                 if(sel[0]&&sel[1]&&sel[2])//pi+k+p
463                         fHistMan->GetPtHistogram("hHistDoubleCounts")->Fill(track->Pt(),0);
464                 else if(sel[0]&&sel[1]) //pi+k
465                         fHistMan->GetPtHistogram("hHistDoubleCounts")->Fill(track->Pt(),1);
466                 else if(sel[0]&&sel[2]) //pi+k
467                         fHistMan->GetPtHistogram("hHistDoubleCounts")->Fill(track->Pt(),2);
468                 else if(sel[1]&&sel[2]) //p+k
469                         fHistMan->GetPtHistogram("hHistDoubleCounts")->Fill(track->Pt(),3);
470
471         
472         
473         } // end loop on tracks
474
475  // cout<< ntracks<<endl;
476   fHistMan->GetGenMulvsRawMulHistogram("hHistGenMulvsRawMul")->Fill(npar,ntracks);
477   PostData(1, fHistMan  );
478   PostData(2, fEventCuts);
479   PostData(3, fTrackCuts);
480   PostData(4, fPID      );
481 }
482
483 //_________________________________________________________________
484 void   AliAnalysisTaskSpectraBoth::Terminate(Option_t *)
485 {
486   // Terminate
487 }