8 #include <TDatabasePDG.h>
9 #include <TClonesArray.h>
12 #include "AliAODMCHeader.h"
13 #include "AliAODMCParticle.h"
15 #include "AliAODEvent.h"
17 #include "AliAODcascade.h"
19 #include "AliCentrality.h"
22 #include "AliPIDResponse.h"
23 #include "AliAODPid.h"
25 #include "AliInputEventHandler.h"
26 #include "AliAnalysisManager.h"
28 #include "AliAnalysisTaskCTauPbPbaod.h"
32 ClassImp(AliAnalysisTaskCTauPbPbaod)
36 // This is a little task for checking the c*tau of the strange particles
39 AliAnalysisTaskCTauPbPbaod::AliAnalysisTaskCTauPbPbaod(const char *name) :
40 AliAnalysisTaskSE(name),
82 fLambdaBarFromXiBar(0),
86 // Constructor. Initialization of pointers
87 DefineOutput(1, TList::Class());
90 void AliAnalysisTaskCTauPbPbaod::UserCreateOutputObjects()
92 Int_t nbins=100; // number of bins
96 fOutput = new TList();
100 fMult=new TH1F("fMult","Multiplicity",1100,0.,3300);
101 fMult->GetXaxis()->SetTitle("N tracks");
104 fCosPA=new TH1F("fCosPA","Cos(PA) distribution",50,0.9975,1.0005);
105 fCosPA->GetXaxis()->SetTitle("Cos(PA)");
106 fOutput->Add(fCosPA);
108 fDtrDCA=new TH1F("fDtrDCA","DCA between V0 daughters",50,0.0,1.5);
109 fDtrDCA->GetXaxis()->SetTitle("DCA (rel. u.)");
110 fOutput->Add(fDtrDCA);
112 fTPCrows=new TH1F("fTPCrows","TPC crossed pad rows",180,0.,180.);
113 fTPCrows->GetXaxis()->SetTitle("TPC crossed pad rows");
114 fOutput->Add(fTPCrows);
116 fTPCratio=new TH1F("fTPCratio","TPC crossed/findable pad rows",50,0.0,1.5);
117 fTPCratio->GetXaxis()->SetTitle("TPC crossed/findable pad rows");
118 fOutput->Add(fTPCratio);
120 fdEdx=new TH2F("fdEdx","dE/dx",50,0.2,3,50,0.,6.);
123 fdEdxPid=new TH2F("fdEdxPid","dE/dx with PID",50,0.2,3,50,0.,6.);
124 fOutput->Add(fdEdxPid);
127 new TH2F("fK0sM", "Mass for K^{0}_{s}", nbins/2,0.448,0.548,nbins,0.,ptMax);
128 fK0sM->GetXaxis()->SetTitle("Mass (GeV/c)");
132 new TH2F("fK0sSi","L_{T} vs p_{T} for K^{0}_{s}, side-band subtracted",
133 nbins,0.,ptMax,nbins,0.,ltMax);
134 fK0sSi->GetXaxis()->SetTitle("p_{T} (GeV/c)");
135 fK0sSi->GetYaxis()->SetTitle("L_{T} (cm)");
136 fOutput->Add(fK0sSi);
139 new TH2F("fK0sMC","L_{T} vs p_{T} for K^{0}_{s}, from MC stack",
140 nbins,0.,ptMax,nbins,0.,ltMax);
141 fK0sMC->GetXaxis()->SetTitle("p_{T} (GeV/c)");
142 fK0sMC->GetYaxis()->SetTitle("L_{T} (cm)");
143 fOutput->Add(fK0sMC);
146 new TH2F("fK0sAs", "L_{T} vs p_{T} for K^{0}_{s}, associated",
147 nbins,0.,ptMax,nbins,0.,ltMax);
148 fK0sAs->GetXaxis()->SetTitle("p_{T} (GeV/c)");
149 fK0sAs->GetYaxis()->SetTitle("L_{T} (cm)");
150 fOutput->Add(fK0sAs);
152 //----------------------
155 new TH2F("fLambdaM","Mass for \\Lambda", nbins, 1.065, 1.165,nbins,0.,ptMax);
156 fLambdaM->GetXaxis()->SetTitle("Mass (GeV/c)");
157 fOutput->Add(fLambdaM);
160 new TH2F("fLambdaSi","L_{T} vs p_{T} for \\Lambda, side-band subtructed",
161 nbins,0.,ptMax,nbins,0.,ltMax);
162 fLambdaSi->GetXaxis()->SetTitle("p_{T} (GeV/c)");
163 fLambdaSi->GetYaxis()->SetTitle("L_{T} (cm)");
164 fOutput->Add(fLambdaSi);
167 new TH2F("fLambdaMC","L_{T} vs p_{T} for \\Lambda, from MC stack",
168 nbins,0.,ptMax,nbins,0.,ltMax);
169 fLambdaMC->GetXaxis()->SetTitle("p_{T} (GeV/c)");
170 fLambdaMC->GetYaxis()->SetTitle("L_{T} (cm)");
171 fOutput->Add(fLambdaMC);
174 new TH2F("fLambdaAs","L_{T} vs p_{T} for \\Lambda, associated",
175 nbins,0.,ptMax,nbins,0.,ltMax);
176 fLambdaAs->GetXaxis()->SetTitle("p_{T} (GeV/c)");
177 fLambdaAs->GetYaxis()->SetTitle("L_{T} (cm)");
178 fOutput->Add(fLambdaAs);
180 //----------------------
182 fLambdaEff=fLambdaAs->ProjectionX();
183 fLambdaEff->SetName("fLambdaEff");
184 fLambdaEff->SetTitle("Efficiency for #Lambda");
185 fOutput->Add(fLambdaEff);
187 fLambdaPt=fLambdaAs->ProjectionX();
188 fLambdaPt->SetName("fLambdaPt");
189 fLambdaPt->SetTitle("Raw #Lambda pT spectrum");
190 fOutput->Add(fLambdaPt);
192 //----------------------
195 new TH2F("fLambdaBarM","Mass for anti-\\Lambda", nbins, 1.065, 1.165,nbins,0.,ptMax);
196 fLambdaBarM->GetXaxis()->SetTitle("Mass (GeV/c)");
197 fOutput->Add(fLambdaBarM);
200 new TH2F("fLambdaBarSi","L_{T} vs p_{T} for anti-\\Lambda, side-band subtructed",
201 nbins,0.,ptMax,nbins,0.,ltMax);
202 fLambdaBarSi->GetXaxis()->SetTitle("p_{T} (GeV/c)");
203 fLambdaBarSi->GetYaxis()->SetTitle("L_{T} (cm)");
204 fOutput->Add(fLambdaBarSi);
207 new TH2F("fLambdaBarMC","L_{T} vs p_{T} for anti-\\Lambda, from MC stack",
208 nbins,0.,ptMax,nbins,0.,ltMax);
209 fLambdaBarMC->GetXaxis()->SetTitle("p_{T} (GeV/c)");
210 fLambdaBarMC->GetYaxis()->SetTitle("L_{T} (cm)");
211 fOutput->Add(fLambdaBarMC);
214 new TH2F("fLambdaBarAs","L_{T} vs p_{T} for anti-\\Lambda, associated",
215 nbins,0.,ptMax,nbins,0.,ltMax);
216 fLambdaBarAs->GetXaxis()->SetTitle("p_{T} (GeV/c)");
217 fLambdaBarAs->GetYaxis()->SetTitle("L_{T} (cm)");
218 fOutput->Add(fLambdaBarAs);
221 //----------------------
223 fLambdaBarEff=fLambdaBarAs->ProjectionX();
224 fLambdaBarEff->SetName("fLambdaBarEff");
225 fLambdaBarEff->SetTitle("Efficiency for anti-#Lambda");
226 fOutput->Add(fLambdaBarEff);
228 fLambdaBarPt=fLambdaBarAs->ProjectionX();
229 fLambdaBarPt->SetName("fLambdaBarPt");
230 fLambdaBarPt->SetTitle("Raw anti-#Lambda pT spectrum");
231 fOutput->Add(fLambdaBarPt);
233 //----------------------
235 fLambdaFromXi=new TH3F("fLambdaFromXi","L_{T} vs p_{T} vs p_{T} of \\Xi for \\Lambda from \\Xi",
236 nbins,0.,ptMax,nbins,0.,ltMax,33,0.,ptMax+2);
237 fOutput->Add(fLambdaFromXi);
240 new TH2F("fXiM", "\\Xi mass distribution", 50, 1.271, 1.371,33,0.,ptMax+2);
243 fXiSiP = new TH1F("fXiSiP", "Pt for \\Xi, side-band subracted",
245 fOutput->Add(fXiSiP);
248 fLambdaBarFromXiBar=new TH3F("fLambdaBarFromXiBar","L_{T} vs p_{T} vs p_{T} of anti-\\Xi for anti-\\Lambda from anti-\\Xi",
249 nbins,0.,ptMax,nbins,0.,ltMax,33,0.,ptMax+2);
250 fOutput->Add(fLambdaBarFromXiBar);
253 new TH2F("fXiBarM", "anti-\\Xi mass distribution", 50, 1.271, 1.371,33,0.,ptMax+2);
254 fOutput->Add(fXiBarM);
256 fXiBarSiP = new TH1F("fXiBarSiP", "Pt for anti-\\Xi, side-band subracted",
258 fOutput->Add(fXiBarSiP);
261 PostData(1, fOutput);
264 Bool_t AliAnalysisTaskCTauPbPbaod::AcceptTrack(const AliAODTrack *t) {
265 if (!t->IsOn(AliAODTrack::kTPCrefit)) return kFALSE;
266 //if (t->GetKinkIndex(0)>0) return kFALSE;
268 Float_t nCrossedRowsTPC = t->GetTPCClusterInfo(2,1);
269 if (nCrossedRowsTPC < fTPCcr) return kFALSE;
270 Int_t findable=t->GetTPCNclsF();
271 if (findable <= 0) return kFALSE;
272 if (nCrossedRowsTPC/findable < fTPCcrfd) return kFALSE;
274 if (TMath::Abs(t->Eta()) > 0.8) return kFALSE;
276 fTPCrows->Fill(nCrossedRowsTPC);
277 fTPCratio->Fill(nCrossedRowsTPC/findable);
283 AliAnalysisTaskCTauPbPbaod::AcceptV0(const AliAODv0 *v0,const AliAODEvent *aod)
285 if (v0->GetOnFlyStatus()) return kFALSE;
287 Double_t cpa=v0->CosPointingAngle(aod->GetPrimaryVertex());
288 if (cpa < fCPA) return kFALSE;
290 Double_t dca=v0->DcaV0Daughters();
291 if (dca > fDCA) return kFALSE;
293 const AliAODTrack *ntrack=(AliAODTrack *)v0->GetDaughter(1);
294 if (!AcceptTrack(ntrack)) return kFALSE;
296 const AliAODTrack *ptrack=(AliAODTrack *)v0->GetDaughter(0);
297 if (!AcceptTrack(ptrack)) return kFALSE;
299 Float_t xy=v0->DcaNegToPrimVertex();
300 if (TMath::Abs(xy)<0.1) return kFALSE;
301 xy=v0->DcaPosToPrimVertex();
302 if (TMath::Abs(xy)<0.1) return kFALSE;
304 Double_t xyz[3]; v0->GetSecondaryVtx(xyz);
305 Double_t r2=xyz[0]*xyz[0] + xyz[1]*xyz[1];
306 if (r2<0.9*0.9) return kFALSE;
307 if (r2>100*100) return kFALSE;
315 Bool_t AliAnalysisTaskCTauPbPbaod::AcceptCascade(const AliAODcascade *cs, const AliAODEvent *aod) {
317 AliAODVertex *xi = cs->GetDecayVertexXi();
318 const AliAODTrack *bach=(AliAODTrack *)xi->GetDaughter(0);
319 if (!AcceptTrack(bach)) return kFALSE;
321 Double_t xy=cs->DcaBachToPrimVertex();
322 if (TMath::Abs(xy) < 0.03) return kFALSE;
324 const AliAODVertex *vtx=aod->GetPrimaryVertex();
325 Double_t xv=vtx->GetX(), yv=vtx->GetY(), zv=vtx->GetZ();
326 Double_t cpa=cs->CosPointingAngleXi(xv,yv,zv);
327 if (cpa<0.999) return kFALSE;
329 if (cs->DcaXiDaughters() > 0.3) return kFALSE;
334 static Bool_t AcceptPID(const AliPIDResponse *pidResponse,
335 const AliAODTrack *ptrack, const TClonesArray *stack) {
337 const AliAODPid *pid=ptrack->GetDetPid();
338 if (!pid) return kTRUE;
339 if (pid->GetTPCmomentum() > 1.) return kTRUE;
343 Int_t plab=TMath::Abs(ptrack->GetLabel());
344 AliAODMCParticle *pp=(AliAODMCParticle*)(*stack)[plab];
345 if (!pp) return kTRUE;
346 if (pp->Charge() > 0) {
347 if (pp->GetPdgCode() == kProton) return kTRUE;
349 if (pp->GetPdgCode() == kProtonBar) return kTRUE;
353 Double_t nsig=pidResponse->NumberOfSigmasTPC(ptrack,AliPID::kProton);
354 if (TMath::Abs(nsig) < 3.) return kTRUE;
360 static AliAODMCParticle*
361 AssociateV0(const AliAODTrack *ptrack, const AliAODTrack *ntrack,
362 const TClonesArray *stack, AliAODMCParticle *&mcp) {
364 // Try to associate the V0 with the daughters ptrack and ntrack
365 // with the Monte Carlo
367 if (!stack) return 0;
369 Int_t nlab=TMath::Abs(ntrack->GetLabel());
370 AliAODMCParticle *n=(AliAODMCParticle*)(*stack)[nlab];
373 Int_t plab=TMath::Abs(ptrack->GetLabel());
374 AliAODMCParticle *p=(AliAODMCParticle*)(*stack)[plab];
377 Int_t imp=p->GetMother(); //V0 particle, the mother of the pos. track
378 AliAODMCParticle *p0=(AliAODMCParticle*)(*stack)[imp];
381 Int_t imn=n->GetMother();
382 if (imp != imn) { // Check decays of the daughters
386 Int_t code=p0->GetPdgCode();
387 if (code != kK0Short)
388 if (code != kLambda0)
389 if (code != kLambda0Bar) return 0;
397 void AliAnalysisTaskCTauPbPbaod::UserExec(Option_t *)
399 const Double_t yMax=0.5;
400 const Double_t pMin=0.0;
401 const Double_t lMax=0.001;
403 AliAODEvent *aod=(AliAODEvent *)InputEvent();
406 Printf("ERROR: aod not available");
411 const AliAODVertex *vtx=aod->GetPrimaryVertex();
412 if (vtx->GetNContributors()<3) return;
413 Double_t xv=vtx->GetX(), yv=vtx->GetY(), zv=vtx->GetZ();
415 if (TMath::Abs(zv) > 10.) return ;
419 AliAnalysisManager *mgr= AliAnalysisManager::GetAnalysisManager();
420 AliInputEventHandler *hdr=(AliInputEventHandler*)mgr->GetInputEventHandler();
421 UInt_t maskIsSelected = hdr->IsEventSelected();
422 Bool_t isSelected = (maskIsSelected & AliVEvent::kMB);
423 if (!isSelected) return;
425 fMult->Fill(-100); //event counter
427 // Centrality selection
428 AliCentrality *cent=aod->GetCentrality();
429 if (!cent->IsEventInCentralityClass(fCMin,fCMax,"V0M")) return;
431 AliPIDResponse *pidResponse = hdr->GetPIDResponse();
436 TClonesArray *stack = 0x0;
437 Double_t mcXv=0., mcYv=0., mcZv=0.;
440 TList *lst = aod->GetList();
441 stack = (TClonesArray*)lst->FindObject(AliAODMCParticle::StdBranchName());
443 Printf("ERROR: stack not available");
447 mcHdr=(AliAODMCHeader*)lst->FindObject(AliAODMCHeader::StdBranchName());
449 mcXv=mcHdr->GetVtxX(); mcYv=mcHdr->GetVtxY(); mcZv=mcHdr->GetVtxZ();
451 Int_t ntrk=stack->GetEntriesFast();
453 AliAODMCParticle *p0=(AliAODMCParticle*)stack->UncheckedAt(ntrk);
454 Int_t code=p0->GetPdgCode();
455 if (code != kK0Short)
456 if (code != kLambda0)
457 if (code != kLambda0Bar) continue;
459 Int_t plab=p0->GetDaughter(0), nlab=p0->GetDaughter(1);
460 if (nlab==plab) continue;
461 AliAODMCParticle *part=(AliAODMCParticle*)(*stack)[plab];
463 Double_t charge=part->Charge();
464 if (charge == 0.) continue;
466 Double_t pt=p0->Pt();
467 if (pt<pMin) continue;
468 if (TMath::Abs(p0->Y())>yMax) continue;
470 Double_t x=p0->Xv(), y=p0->Yv(), z=p0->Zv();
471 Double_t dxmc=mcXv-x, dymc=mcYv-y, dzmc=mcZv-z;
472 Double_t l=TMath::Sqrt(dxmc*dxmc + dymc*dymc + dzmc*dzmc);
474 if (l > lMax) continue; // secondary V0
476 x=part->Xv(); y=part->Yv();
477 dxmc=mcXv-x; dymc=mcYv-y;
478 Double_t lt=TMath::Sqrt(dxmc*dxmc + dymc*dymc);
485 fLambdaMC->Fill(pt,lt);
488 fLambdaBarMC->Fill(pt,lt);
497 Int_t ntrk1=aod->GetNumberOfTracks();
499 for (Int_t i=0; i<ntrk1; i++) {
500 AliAODTrack *t=aod->GetTrack(i);
501 if (t->IsMuonTrack()) continue;
502 if (!t->IsOn(AliAODTrack::kTPCrefit)) continue;
505 if (t->GetPosition(xyz)) continue;
506 if (TMath::Abs(xyz[0])>3.) continue;
507 if (TMath::Abs(xyz[1])>3.) continue;
509 Double_t pt=t->Pt(),pz=t->Pz();
510 if (TMath::Abs(pz/pt)>0.8) continue;
514 const AliAODPid *pid=t->GetDetPid();
517 Double_t p=pid->GetTPCmomentum();
518 Double_t dedx=pid->GetTPCsignal()/47.;
519 fdEdx->Fill(p,dedx,1);
521 Double_t nsig=pidResponse->NumberOfSigmasTPC(t,AliPID::kProton);
522 if (TMath::Abs(nsig) < 3.) fdEdxPid->Fill(p,dedx,1);
528 Int_t nv0 = aod->GetNumberOfV0s();
530 AliAODv0 *v0=aod->GetV0(nv0);
532 Double_t pt=TMath::Sqrt(v0->Pt2V0());
533 if (pt < pMin) continue;
535 if (!AcceptV0(v0,aod)) continue;
537 const AliAODTrack *ntrack=(AliAODTrack *)v0->GetDaughter(1);
538 const AliAODTrack *ptrack=(AliAODTrack *)v0->GetDaughter(0);
540 Double_t xyz[3]; v0->GetSecondaryVtx(xyz);
541 Double_t dxv=xyz[0]-xv, dyv=xyz[1]-yv;
542 Double_t lt=TMath::Sqrt(dxv*dxv + dyv*dyv);
544 if (lt/pt > 3*7.89/1.1157) continue;
548 Bool_t isLambda=kTRUE;
549 Bool_t isLambdaBar=kTRUE;
551 if (0.4977*lt/pt > 3*2.68) isK0s=kFALSE;
552 if (1.1157*lt/pt > 3*7.89) isLambdaBar=isLambda=kFALSE;
554 if (!AcceptPID(pidResponse, ptrack, stack)) isLambda=kFALSE;
555 if (!AcceptPID(pidResponse, ntrack, stack)) isLambdaBar=kFALSE;
557 Double_t yK0s=TMath::Abs(v0->RapK0Short());
558 Double_t yLam=TMath::Abs(v0->RapLambda());
559 if (yK0s > yMax) isK0s=kFALSE;
560 if (yLam > yMax) isLambda=isLambdaBar=kFALSE;
563 Double_t mass=0., m=0., s=0.;
565 mass=v0->MassK0Short();
566 fK0sM->Fill(mass,pt);
568 m=TDatabasePDG::Instance()->GetParticle(kK0Short)->Mass();
569 s=0.0044 + (0.008-0.0044)/(10-1)*(pt - 1.);
570 if (TMath::Abs(m-mass) < 3*s) {
575 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
576 fK0sSi->Fill(pt,lt,-1);
578 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
579 fK0sSi->Fill(pt,lt,-1);
584 mass=v0->MassLambda();
585 fLambdaM->Fill(mass,pt);
587 m=TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass();
588 //s=0.0027 + (0.004-0.0027)/(10-1)*(pt-1);
589 //s=0.0015 + (0.002-0.0015)/(2.6-1)*(pt-1);
590 s=0.0023 + (0.004-0.0023)/(6-1)*(pt-1);
591 if (TMath::Abs(m-mass) < 3*s) {
592 fLambdaSi->Fill(pt,lt);
596 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
597 fLambdaSi->Fill(pt,lt,-1);
599 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
600 fLambdaSi->Fill(pt,lt,-1);
605 mass=v0->MassAntiLambda();
606 fLambdaBarM->Fill(mass,pt);
608 m=TDatabasePDG::Instance()->GetParticle(kLambda0Bar)->Mass();
609 //s=0.0027 + (0.004-0.0027)/(10-1)*(pt-1);
610 //s=0.0015 + (0.002-0.0015)/(2.6-1)*(pt-1);
611 s=0.0023 + (0.004-0.0023)/(6-1)*(pt-1);
612 if (TMath::Abs(m-mass) < 3*s) {
613 fLambdaBarSi->Fill(pt,lt);
617 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
618 fLambdaBarSi->Fill(pt,lt,-1);
620 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
621 fLambdaBarSi->Fill(pt,lt,-1);
625 if (!fIsMC) continue;
630 if (!isLambdaBar) continue;//check MC only for the accepted V0s
632 AliAODMCParticle *mcp=0;
633 AliAODMCParticle *mc0=AssociateV0(ptrack,ntrack,stack,mcp);
636 Double_t ptAs=mc0->Pt();
637 if (ptAs < pMin) continue;
638 Double_t yAs=mc0->Y();
639 if (TMath::Abs(yAs) > yMax) continue;
641 Int_t code=mc0->GetPdgCode();
643 Double_t dx = mcXv - mcp->Xv(), dy = mcYv - mcp->Yv();
644 Double_t ltAs=TMath::Sqrt(dx*dx + dy*dy);
646 Double_t dz=mcZv - mc0->Zv(); dy=mcYv - mc0->Yv(); dx=mcXv - mc0->Xv();
647 Double_t l = TMath::Sqrt(dx*dx + dy*dy + dz*dz);
648 if (l<lMax) { // Primary V0s
651 if (isK0s) fK0sAs->Fill(ptAs,ltAs);
654 if (isLambda) fLambdaAs->Fill(ptAs,ltAs);
657 if (isLambdaBar) fLambdaBarAs->Fill(ptAs,ltAs);
662 if (code==kK0Short) continue;
664 Int_t nx=mc0->GetMother();
665 AliAODMCParticle *xi=(AliAODMCParticle*)(*stack)[nx];
667 Int_t xcode=xi->GetPdgCode();
672 if ((xcode==kXiMinus) || (xcode==3322))
673 fLambdaFromXi->Fill(ptAs,ltAs,xi->Pt());
677 if ((xcode==kXiPlusBar)||(xcode==-3322))
678 fLambdaBarFromXiBar->Fill(ptAs,ltAs,xi->Pt());
687 Int_t ncs=aod->GetNumberOfCascades();
688 for (Int_t i=0; i<ncs; i++) {
689 AliAODcascade *cs=aod->GetCascade(i);
691 Double_t pt=TMath::Sqrt(cs->Pt2Xi());
692 if (pt < pMin) continue;
693 if (TMath::Abs(cs->RapXi()) > yMax) continue;
694 if (!AcceptCascade(cs,aod)) continue;
696 const AliAODv0 *v0=(AliAODv0*)cs;
697 if (v0->RapLambda() > yMax) continue;
698 if (!AcceptV0(v0,aod)) continue;
700 //--- Cascade switches
701 Bool_t isXiMinus=kTRUE;
702 Bool_t isXiPlusBar=kTRUE;
704 const AliAODTrack *ptrack=(AliAODTrack *)v0->GetDaughter(0);
705 if (!AcceptPID(pidResponse, ptrack, stack)) isXiMinus=kFALSE;
707 const AliAODTrack *ntrack=(AliAODTrack *)v0->GetDaughter(1);
708 if (!AcceptPID(pidResponse, ntrack, stack)) isXiPlusBar=kFALSE;
710 Int_t charge=cs->ChargeXi();
711 if (charge > 0) isXiMinus=kFALSE;
712 if (charge < 0) isXiPlusBar=kFALSE;
716 Double_t mass=cs->MassXi();
718 Double_t m=TDatabasePDG::Instance()->GetParticle(kXiMinus)->Mass();
720 Double_t s=0.002 + (0.0032-0.002)/(6-1.5)*(pt-1.5);
721 if (TMath::Abs(m-mass) < 3*s) {
726 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
729 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
735 Double_t mass=cs->MassXi();
736 fXiBarM->Fill(mass,pt);
737 Double_t m=TDatabasePDG::Instance()->GetParticle(kXiPlusBar)->Mass();
739 Double_t s=0.002 + (0.0032-0.002)/(6-1.5)*(pt-1.5);
740 if (TMath::Abs(m-mass) < 3*s) {
745 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
746 fXiBarSiP->Fill(pt,-1);
748 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
749 fXiBarSiP->Fill(pt,-1);
753 if (!fIsMC) continue;
757 if (!isXiPlusBar) continue;//check MC only for the accepted cascades
758 // Here is the future association with MC
764 void AliAnalysisTaskCTauPbPbaod::Terminate(Option_t *)
766 // The Terminate() function is the last function to be called during
767 // a query. It always runs on the client, it can be used to present
768 // the results graphically or save the results to file.
770 fOutput=(TList*)GetOutputData(1);
772 Printf("ERROR: fOutput not available");
776 fMult = dynamic_cast<TH1F*>(fOutput->FindObject("fMult")) ;
778 Printf("ERROR: fMult not available");
782 fdEdx = dynamic_cast<TH2F*>(fOutput->FindObject("fdEdx")) ;
784 Printf("ERROR: fdEdx not available");
788 fdEdxPid = dynamic_cast<TH2F*>(fOutput->FindObject("fdEdxPid")) ;
790 Printf("ERROR: fdEdxPid not available");
795 fK0sMC = dynamic_cast<TH2F*>(fOutput->FindObject("fK0sMC")) ;
797 Printf("ERROR: fK0sMC not available");
800 TH1D *k0sMcPx=fK0sMC->ProjectionX(); k0sMcPx->Sumw2();
801 fK0sAs = dynamic_cast<TH2F*>(fOutput->FindObject("fK0sAs")) ;
803 Printf("ERROR: fK0sAs not available");
806 TH1D *k0sAsPx=fK0sAs->ProjectionX();
807 k0sAsPx->Sumw2(); //k0sAsPx->Scale(0.69);
812 fLambdaFromXi = dynamic_cast<TH3F*>(fOutput->FindObject("fLambdaFromXi")) ;
813 if (!fLambdaFromXi) {
814 Printf("ERROR: fLambdaFromXi not available");
817 TH1D *lambdaFromXiPx=fLambdaFromXi->ProjectionX(); lambdaFromXiPx->Sumw2();
819 fLambdaMC = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaMC")) ;
821 Printf("ERROR: fLambdaMC not available");
824 TH1D *lambdaMcPx=fLambdaMC->ProjectionX(); lambdaMcPx->Sumw2();
826 fLambdaAs = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaAs")) ;
828 Printf("ERROR: fLambdaAs not available");
831 TH1D *lambdaAsPx=fLambdaAs->ProjectionX();
832 lambdaAsPx->Sumw2(); //lambdaAsPx->Scale(0.64);
834 fLambdaSi = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaSi")) ;
836 Printf("ERROR: fLambdaSi not available");
839 TH1D *lambdaSiPx=fLambdaSi->ProjectionX();
840 lambdaSiPx->SetName("fLambdaPt");
843 fLambdaEff = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaEff")) ;
845 Printf("ERROR: fLambdaEff not available");
848 fLambdaPt = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaPt")) ;
850 Printf("ERROR: fLambdaPt not available");
855 // anti-Lambda histograms
856 fLambdaBarFromXiBar =
857 dynamic_cast<TH3F*>(fOutput->FindObject("fLambdaBarFromXiBar")) ;
858 if (!fLambdaBarFromXiBar) {
859 Printf("ERROR: fLambdaBarFromXiBar not available");
862 TH1D *lambdaBarFromXiBarPx=
863 fLambdaBarFromXiBar->ProjectionX("Bar"); lambdaBarFromXiBarPx->Sumw2();
865 fLambdaBarMC = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaBarMC")) ;
867 Printf("ERROR: fLambdaBarMC not available");
870 TH1D *lambdaBarMcPx=fLambdaBarMC->ProjectionX(); lambdaBarMcPx->Sumw2();
872 fLambdaBarAs = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaBarAs")) ;
874 Printf("ERROR: fLambdaBarAs not available");
877 TH1D *lambdaBarAsPx=fLambdaBarAs->ProjectionX();
878 lambdaBarAsPx->Sumw2(); //lambdaBarAsPx->Scale(0.64);
880 fLambdaBarSi = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaBarSi")) ;
882 Printf("ERROR: fLambdaBarSi not available");
885 TH1D *lambdaBarSiPx=fLambdaBarSi->ProjectionX();
886 lambdaBarSiPx->SetName("fLambdaBarPt");
887 lambdaBarSiPx->Sumw2();
889 fLambdaBarEff = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaBarEff")) ;
890 if (!fLambdaBarEff) {
891 Printf("ERROR: fLambdaBarEff not available");
894 fLambdaBarPt = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaBarPt")) ;
896 Printf("ERROR: fLambdaBarPt not available");
901 if (!gROOT->IsBatch()) {
903 TCanvas *c1 = new TCanvas("c1","Mulitplicity");
907 new TCanvas("c2","dE/dx");
910 new TCanvas("c3","dE/dx with PID");
911 fdEdxPid->DrawCopy() ;
915 TH1D effK(*k0sAsPx); effK.SetTitle("Efficiency for K0s");
916 effK.Divide(k0sAsPx,k0sMcPx,1,1,"b");
917 new TCanvas("c4","Efficiency for K0s");
922 fLambdaEff->Divide(lambdaAsPx,lambdaMcPx,1,1,"b");
923 new TCanvas("c5","Efficiency for #Lambda");
924 fLambdaEff->DrawCopy("E") ;
926 lambdaSiPx->Add(lambdaFromXiPx,-1);
927 lambdaSiPx->Divide(fLambdaEff);
929 new TCanvas("c6","Corrected #Lambda pt");
930 lambdaSiPx->SetTitle("Corrected #Lambda pt");
931 *fLambdaPt = *lambdaSiPx;
932 fLambdaPt->SetLineColor(2);
933 fLambdaPt->DrawCopy("E");
935 lambdaMcPx->DrawCopy("same");
939 fLambdaBarEff->Divide(lambdaBarAsPx,lambdaBarMcPx,1,1,"b");
940 new TCanvas("c7","Efficiency for anti-#Lambda");
941 fLambdaBarEff->DrawCopy("E") ;
943 lambdaBarSiPx->Add(lambdaBarFromXiBarPx,-1);
944 lambdaBarSiPx->Divide(fLambdaBarEff);
946 new TCanvas("c8","Corrected anti-#Lambda pt");
947 lambdaBarSiPx->SetTitle("Corrected anti-#Lambda pt");
948 *fLambdaBarPt = *lambdaBarSiPx;
949 fLambdaBarPt->SetLineColor(2);
950 fLambdaBarPt->DrawCopy("E");
952 lambdaBarMcPx->DrawCopy("same");
954 new TCanvas("c6","Raw #Lambda pt");
955 lambdaSiPx->SetTitle("Raw #Lambda pt");
956 *fLambdaPt = *lambdaSiPx;
957 fLambdaPt->SetLineColor(2);
958 fLambdaPt->DrawCopy("E");
961 new TCanvas("c7","Raw anti-#Lambda pt");
962 lambdaBarSiPx->SetTitle("Raw anti-#Lambda pt");
963 *fLambdaBarPt = *lambdaBarSiPx;
964 fLambdaBarPt->SetLineColor(2);
965 fLambdaBarPt->DrawCopy("E");