1 /**************************************************************************
2 * Copyright(c) 1998-2009, 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 *
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11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
17 // Task for selecting D mesons to be used as an input for D-Jet correlations
19 //-----------------------------------------------------------------------
21 // C. Bianchin (Utrecht University) chiara.bianchin@cern.ch
22 // A.Grelli (Utrecht University) a.grelli@uu.nl
23 // Xiaoming Zhang (LBNL) XMZhang@lbl.gov
24 //-----------------------------------------------------------------------
26 #include <TDatabasePDG.h>
27 #include <TParticle.h>
32 #include "AliRDHFCutsDStartoKpipi.h"
33 #include "AliRDHFCutsD0toKpi.h"
34 #include "AliAODMCHeader.h"
35 #include "AliAODHandler.h"
36 #include "AliAnalysisManager.h"
38 #include "AliAODVertex.h"
39 #include "AliAODRecoDecay.h"
40 #include "AliAODRecoCascadeHF.h"
41 #include "AliAODRecoDecayHF2Prong.h"
42 #include "AliESDtrack.h"
43 #include "AliAODMCParticle.h"
44 #include "AliAnalysisTaskSEDmesonsFilterCJ.h"
46 ClassImp(AliAnalysisTaskSEDmesonsFilterCJ)
48 //_______________________________________________________________________________
50 AliAnalysisTaskSEDmesonsFilterCJ::AliAnalysisTaskSEDmesonsFilterCJ() :
67 // Default constructor
70 for (Int_t i=4; i--;) fPDGdaughters[i] = 0;
71 for (Int_t i=30; i--;) fSigmaD0[i] = 0.;
74 //_______________________________________________________________________________
76 AliAnalysisTaskSEDmesonsFilterCJ::AliAnalysisTaskSEDmesonsFilterCJ(const char *name, AliRDHFCuts *cuts, ECandidateType candtype) :
77 AliAnalysisTaskSE(name),
80 fCandidateType(candtype),
92 // Constructor. Initialization of Inputs and Outputs
95 Info("AliAnalysisTaskSEDmesonsFilterCJ","Calling Constructor");
97 for (Int_t i=4; i--;) fPDGdaughters[i] = 0;
98 for (Int_t i=30; i--;) fSigmaD0[i] = 0.;
100 const Int_t nptbins = fCuts->GetNPtBins();
101 Float_t defaultSigmaD013[13] = { 0.012, 0.012, 0.012, 0.015, 0.015, 0.018, 0.018, 0.020, 0.020, 0.030, 0.030, 0.037, 0.040 };
103 switch (fCandidateType) {
105 fCandidateName = "D0";
108 fPDGdaughters[0] = 211; // pi
109 fPDGdaughters[1] = 321; // K
110 fPDGdaughters[2] = 0; // empty
111 fPDGdaughters[3] = 0; // empty
112 fBranchName = "D0toKpi";
115 fCandidateName = "Dstar";
118 fPDGdaughters[1] = 211; // pi soft
119 fPDGdaughters[0] = 421; // D0
120 fPDGdaughters[2] = 211; // pi fromD0
121 fPDGdaughters[3] = 321; // K from D0
122 fBranchName = "Dstar";
125 for (Int_t ipt=0; ipt<nptbins;ipt++) fSigmaD0[ipt] = defaultSigmaD013[ipt];
127 AliFatal(Form("Default sigma D0 not enough for %d pt bins, use SetSigmaD0ForDStar to set them",nptbins));
131 printf("%d not accepted!!\n",fCandidateType);
135 if (fCandidateType==kD0toKpi) SetMassLimits(0.15, fPDGmother);
136 if (fCandidateType==kDstartoKpipi) SetMassLimits(0.015, fPDGmother);
138 DefineOutput(1, TList::Class()); // histos
139 DefineOutput(2, AliRDHFCuts::Class()); // my cuts
142 //_______________________________________________________________________________
144 AliAnalysisTaskSEDmesonsFilterCJ::~AliAnalysisTaskSEDmesonsFilterCJ()
150 Info("~AliAnalysisTaskSEDmesonsFilterCJ","Calling Destructor");
152 if (fOutput) { delete fOutput; fOutput = 0; }
153 if (fCuts) { delete fCuts; fCuts = 0; }
154 if (fCandidateArray) { delete fCandidateArray; fCandidateArray = 0; }
158 //_______________________________________________________________________________
160 void AliAnalysisTaskSEDmesonsFilterCJ::Init()
166 if(fDebug>1) printf("AnalysisTaskSEDmesonsForJetCorrelations::Init() \n");
168 switch (fCandidateType) {
170 AliRDHFCutsD0toKpi* copyfCutsDzero = new AliRDHFCutsD0toKpi(*(static_cast<AliRDHFCutsD0toKpi*>(fCuts)));
171 copyfCutsDzero->SetName("AnalysisCutsDzero");
172 PostData(2, copyfCutsDzero); // Post the data
175 AliRDHFCutsDStartoKpipi* copyfCutsDstar = new AliRDHFCutsDStartoKpipi(*(static_cast<AliRDHFCutsDStartoKpipi*>(fCuts)));
176 copyfCutsDstar->SetName("AnalysisCutsDStar");
177 PostData(2, copyfCutsDstar); // Post the cuts
185 //_______________________________________________________________________________
187 void AliAnalysisTaskSEDmesonsFilterCJ::UserCreateOutputObjects()
193 Info("UserCreateOutputObjects","CreateOutputObjects of task %s\n", GetName());
195 fOutput = new TList(); fOutput->SetOwner();
196 DefineHistoForAnalysis(); // define histograms
198 fCandidateArray = new TClonesArray("AliAODRecoDecayHF",0);
199 fCandidateArray->SetName(Form("fCandidateArray%s%s",fCandidateName.Data(),fUseReco ? "rec" : "gen"));
201 if (fCandidateType==kDstartoKpipi){
202 fSideBandArray = new TClonesArray("AliAODRecoCascadeHF",0); //this is for the DStar only!
203 fSideBandArray->SetName(Form("fSideBandArray%s%s",fCandidateName.Data(),fUseReco ? "rec" : "gen"));
206 PostData(1, fOutput);
210 //_______________________________________________________________________________
212 void AliAnalysisTaskSEDmesonsFilterCJ::UserExec(Option_t *){
217 // add cadidate branch
218 fCandidateArray->Delete();
219 if (!(InputEvent()->FindListObject(Form("fCandidateArray%s%s",fCandidateName.Data(),fUseReco ? "rec" : "gen")))) InputEvent()->AddObject(fCandidateArray);
220 if (fCandidateType==kDstartoKpipi){
221 fSideBandArray->Delete();
222 if (!(InputEvent()->FindListObject(Form("fSideBandArray%s%s",fCandidateName.Data(),fUseReco ? "rec" : "gen")))) InputEvent()->AddObject(fSideBandArray);
224 //Printf("Arr names %s, %s",fCandidateArray->GetName(),fSideBandArray->GetName());
226 AliAODEvent *aodEvent = dynamic_cast<AliAODEvent*>(fInputEvent);
228 TClonesArray *arrayDStartoD0pi = 0;
229 if (!aodEvent && AODEvent() && IsStandardAOD()) {
231 // In case there is an AOD handler writing a standard AOD, use the AOD
232 // event in memory rather than the input (ESD) event.
233 aodEvent = dynamic_cast<AliAODEvent*>(AODEvent());
235 // in this case the braches in the deltaAOD (AliAOD.VertexingHF.root)
236 // have to taken from the AOD event hold by the AliAODExtension
237 AliAODHandler *aodHandler = (AliAODHandler*)((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
238 if(aodHandler->GetExtensions()) {
239 AliAODExtension *ext = (AliAODExtension*)aodHandler->GetExtensions()->FindObject("AliAOD.VertexingHF.root");
240 AliAODEvent *aodFromExt = ext->GetAOD();
241 arrayDStartoD0pi = (TClonesArray*)aodFromExt->GetList()->FindObject(fBranchName.Data());
244 arrayDStartoD0pi = (TClonesArray*)aodEvent->GetList()->FindObject(fBranchName.Data());
247 if (!arrayDStartoD0pi) {
248 AliInfo(Form("Could not find array %s, skipping the event",fBranchName.Data()));
251 AliDebug(2, Form("Found %d vertices",arrayDStartoD0pi->GetEntriesFast()));
254 TClonesArray* mcArray = 0x0;
256 mcArray = dynamic_cast<TClonesArray*>(aodEvent->FindListObject(AliAODMCParticle::StdBranchName()));
258 printf("AliAnalysisTaskSEDStarSpectra::UserExec: MC particles not found!\n");
264 TH1I* hstat = (TH1I*)fOutput->FindObject("hstat");
265 TH1F* hnSBCandEv=(TH1F*)fOutput->FindObject("hnSBCandEv");
266 TH1F* hnCandEv=(TH1F*)fOutput->FindObject("hnCandEv");
267 TH2F* hInvMassptD = (TH2F*)fOutput->FindObject("hInvMassptD");
270 if (fCandidateType==kDstartoKpipi) hPtPion = (TH1F*)fOutput->FindObject("hPtPion");
273 // fix for temporary bug in ESDfilter
274 // the AODs with null vertex pointer didn't pass the PhysSel
275 if(!aodEvent->GetPrimaryVertex() || TMath::Abs(aodEvent->GetMagneticField())<0.001) return;
278 Bool_t iseventselected=fCuts->IsEventSelected(aodEvent);
279 //TString firedTriggerClasses=((AliAODEvent*)aodEvent)->GetFiredTriggerClasses();
280 if (!iseventselected) return;
283 const Int_t nD = arrayDStartoD0pi->GetEntriesFast();
284 if(fUseReco) hstat->Fill(2, nD);
286 //D* and D0 prongs needed to MatchToMC method
287 Int_t pdgDgDStartoD0pi[2] = { 421, 211 }; // D0,pi
288 Int_t pdgDgD0toKpi[2] = { 321, 211 }; // K, pi
291 Int_t pdgdaughtersD0[2] = { 211, 321 }; // pi,K
292 Int_t pdgdaughtersD0bar[2] = { 321, 211 }; // K,pi
296 Int_t isSelected = 0;
297 AliAODRecoDecayHF *charmCand = 0;
298 AliAODMCParticle *charmPart = 0;
299 Bool_t isMCBkg=kFALSE;
301 Double_t mPDGD0 = TDatabasePDG::Instance()->GetParticle(421)->Mass();
303 Int_t mcLabel = -9999;
304 Int_t pdgMeson = 413;
305 if (fCandidateType==kD0toKpi) pdgMeson = 421;
307 for (Int_t icharm=0; icharm<nD; icharm++) { //loop over D candidates
308 charmCand = (AliAODRecoDecayHF*)arrayDStartoD0pi->At(icharm); // D candidates
309 if (!charmCand) continue;
312 if (fUseMCInfo) { // Look in MC, try to simulate the z
313 if (fCandidateType==kDstartoKpipi) {
314 AliAODRecoCascadeHF *temp = (AliAODRecoCascadeHF*)charmCand;
315 mcLabel = temp->MatchToMC(413,421,pdgDgDStartoD0pi,pdgDgD0toKpi,mcArray);
318 if (fCandidateType==kD0toKpi)
319 mcLabel = charmCand->MatchToMC(421,mcArray,fNProngs,fPDGdaughters);
321 if (mcLabel<=0) isMCBkg=kTRUE;
323 if (!isMCBkg) charmPart=(AliAODMCParticle*)mcArray->At(mcLabel);
326 Double_t ptD = charmCand->Pt();
328 // region of interest + cuts
329 if (!fCuts->IsInFiducialAcceptance(ptD,charmCand->Y(pdgMeson))) continue;
331 if(!fUseMCInfo && fCandidateType==kDstartoKpipi){
332 //select by track cuts the side band candidates (don't want mass cut)
333 isSelected = fCuts->IsSelected(charmCand,AliRDHFCuts::kTracks,aodEvent);
334 if (!isSelected) continue;
335 //add a reasonable cut on the invariant mass (e.g. (+-2\sigma, +-10 \sigma), with \sigma = fSigmaD0[bin])
336 Int_t bin = fCuts->PtBin(ptD);
337 if(bin<0 || bin>=fCuts->GetNPtBins()) {
338 AliError(Form("Pt %.3f out of bounds",ptD));
341 AliAODRecoCascadeHF *temp = (AliAODRecoCascadeHF*)charmCand;
342 //if data and Dstar from D0 side band
343 if (((temp->InvMassD0()<=(mPDGD0-3.*fSigmaD0[bin])) && (temp->InvMassD0()>(mPDGD0-10.*fSigmaD0[bin]))) /*left side band*/|| ((temp->InvMassD0()>=(mPDGD0+3.*fSigmaD0[bin])) && (temp->InvMassD0()<(mPDGD0+10.*fSigmaD0[bin])))/*right side band*/){
345 new ((*fSideBandArray)[iSBCand]) AliAODRecoCascadeHF(*temp);
349 //candidate selected by cuts and PID
350 isSelected = fCuts->IsSelected(charmCand,AliRDHFCuts::kAll,aodEvent); //selected
351 if (!isSelected) continue;
353 //for data and MC signal fill fCandidateArray
354 if(!fUseMCInfo || (fUseMCInfo && !isMCBkg)){
355 // for data or MC with the requirement fUseReco fill with candidates
357 new ((*fCandidateArray)[iCand]) AliAODRecoDecayHF(*charmCand);
358 //Printf("Filling reco");
361 // for MC with requirement particle level fill with AliAODMCParticle
362 else if (fUseMCInfo) {
363 new ((*fCandidateArray)[iCand]) AliAODMCParticle(*charmPart);
364 //Printf("Filling gen");
370 //for MC background fill fSideBandArray (which is instead filled above for DStar in case of data for the side bands candidates)
372 new ((*fSideBandArray)[iSBCand]) AliAODRecoDecayHF(*charmCand);
378 if (fCandidateType==kDstartoKpipi) { //D*->D0pi->Kpipi
380 //softpion from D* decay
381 AliAODRecoCascadeHF *temp = (AliAODRecoCascadeHF*)charmCand;
382 AliAODTrack *track2 = (AliAODTrack*)temp->GetBachelor();
384 // select D* in the D0 window.
385 // In the cut object window is loose to allow for side bands
388 // retrieve the corresponding pt bin for the candidate
389 // and set the expected D0 width (x3)
390 // static const Int_t n = fCuts->GetNPtBins();
391 Int_t bin = fCuts->PtBin(ptD);
392 if(bin<0 || bin>=fCuts->GetNPtBins()) {
393 AliError(Form("Pt %.3f out of bounds",ptD));
397 AliInfo(Form("Pt bin %d and sigma D0 %.4f",bin,fSigmaD0[bin]));
398 //consider the Dstar candidates only if the mass of the D0 is in 3 sigma wrt the PDG value
399 if ((temp->InvMassD0()>=(mPDGD0-3.*fSigmaD0[bin])) && (temp->InvMassD0()<=(mPDGD0+3.*fSigmaD0[bin]))) {
400 masses[0] = temp->DeltaInvMass(); //D*
401 masses[1] = 0.; //dummy for D*
404 hInvMassptD->Fill(masses[0], ptD); // 2 D slice for pt bins
406 // D* pt and soft pion pt for good candidates
407 Double_t mPDGDstar = TDatabasePDG::Instance()->GetParticle(413)->Mass();
408 Double_t invmassDelta = temp->DeltaInvMass();
409 if (TMath::Abs(invmassDelta-(mPDGDstar-mPDGD0))<0.0021) hPtPion->Fill(track2->Pt());
413 if (fCandidateType==kD0toKpi) { //D0->Kpi
416 masses[0] = charmCand->InvMass(fNProngs, (UInt_t*)pdgdaughtersD0); //D0
417 masses[1] = charmCand->InvMass(fNProngs, (UInt_t*)pdgdaughtersD0bar); //D0bar
421 if (isSelected==1 || isSelected==3) hInvMassptD->Fill(masses[0],ptD);
422 if (isSelected>=2) hInvMassptD->Fill(masses[1],ptD);
427 } // end of D cand loop
429 hnCandEv->Fill(fCandidateArray->GetEntriesFast());
430 if (fCandidateType==kDstartoKpipi || fUseMCInfo) {
431 Int_t nsbcand=fSideBandArray->GetEntriesFast();
432 hstat->Fill(4,nsbcand);
433 hnSBCandEv->Fill(nsbcand);
439 //_______________________________________________________________________________
441 void AliAnalysisTaskSEDmesonsFilterCJ::Terminate(Option_t*)
443 // The Terminate() function is the last function to be called during
444 // a query. It always runs on the client, it can be used to present
445 // the results graphically or save the results to file.
447 Info("Terminate"," terminate");
448 AliAnalysisTaskSE::Terminate();
450 fOutput = dynamic_cast<TList*>(GetOutputData(1));
452 printf("ERROR: fOutput not available\n");
459 //_______________________________________________________________________________
461 void AliAnalysisTaskSEDmesonsFilterCJ::SetMassLimits(Double_t range, Int_t pdg)
464 // AliAnalysisTaskSEDmesonsFilterCJ::SetMassLimits
467 Float_t mass = TDatabasePDG::Instance()->GetParticle(TMath::Abs(pdg))->Mass();
469 // compute the Delta mass for the D*
470 if (fCandidateType==kDstartoKpipi) mass -= TDatabasePDG::Instance()->GetParticle(421)->Mass();
473 fMinMass = mass - range;
474 fMaxMass = mass + range;
476 AliInfo(Form("Setting mass limits to %f, %f",fMinMass,fMaxMass));
477 if ((fMinMass<0.) || (fMaxMass<=0.) || (fMaxMass<fMinMass)) AliFatal("Wrong mass limits!\n");
482 //_______________________________________________________________________________
484 void AliAnalysisTaskSEDmesonsFilterCJ::SetMassLimits(Double_t lowlimit, Double_t uplimit)
487 // AliAnalysisTaskSEDmesonsFilterCJ::SetMassLimits
490 if (uplimit>lowlimit) {
494 printf("Error! Lower limit larger than upper limit!\n");
495 fMinMass = uplimit - uplimit*0.2;
502 //_______________________________________________________________________________
504 Bool_t AliAnalysisTaskSEDmesonsFilterCJ::SetD0WidthForDStar(Int_t nptbins, Float_t *width)
507 // AliAnalysisTaskSEDmesonsFilterCJ::SetD0WidthForDStar
511 AliInfo("Maximum number of bins allowed is 30!");
515 if (!width) return kFALSE;
516 for (Int_t ipt=0; ipt<nptbins; ipt++) fSigmaD0[ipt]=width[ipt];
521 //_______________________________________________________________________________
523 Bool_t AliAnalysisTaskSEDmesonsFilterCJ::DefineHistoForAnalysis()
526 // AliAnalysisTaskSEDmesonsFilterCJ::DefineHistoForAnalysis
530 TH1I* hstat = new TH1I("hstat","Statistics",5,-0.5,4.5);
531 hstat->GetXaxis()->SetBinLabel(1, "N ev anal");
532 hstat->GetXaxis()->SetBinLabel(2, "N ev sel");
533 if(fUseReco) hstat->GetXaxis()->SetBinLabel(3, "N cand");
534 else hstat->GetXaxis()->SetBinLabel(3, "N Gen D");
535 hstat->GetXaxis()->SetBinLabel(4, "N cand sel cuts");
536 if (fCandidateType==kDstartoKpipi) hstat->GetXaxis()->SetBinLabel(5, "N side band cand");
537 hstat->SetNdivisions(1);
540 TH1F* hnCandEv=new TH1F("hnCandEv", "Number of candidates per event (after cuts);# cand/ev", 100, 0.,100.);
541 fOutput->Add(hnCandEv);
543 // Invariant mass related histograms
544 const Int_t nbinsmass = 200;
545 TH2F *hInvMass = new TH2F("hInvMassptD", "D invariant mass distribution", nbinsmass, fMinMass, fMaxMass, 100, 0., 50.);
546 hInvMass->SetStats(kTRUE);
547 hInvMass->GetXaxis()->SetTitle("mass (GeV/c)");
548 hInvMass->GetYaxis()->SetTitle("p_{T} (GeV/c)");
549 fOutput->Add(hInvMass);
551 if (fCandidateType==kDstartoKpipi) {
552 TH1F* hnSBCandEv=new TH1F("hnSBCandEv", "Number of side bands candidates per event (after cuts);# cand/ev", 100, 0.,100.);
553 fOutput->Add(hnSBCandEv);
555 TH1F* hPtPion = new TH1F("hPtPion", "Primary pions candidates pt", 500, 0., 10.);
556 hPtPion->SetStats(kTRUE);
557 hPtPion->GetXaxis()->SetTitle("p_{T} (GeV/c)");
558 hPtPion->GetYaxis()->SetTitle("entries");
559 fOutput->Add(hPtPion);