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),
78 fLambdaBarFromXiBar(0),
82 // Constructor. Initialization of pointers
83 DefineOutput(1, TList::Class());
86 void AliAnalysisTaskCTauPbPbaod::UserCreateOutputObjects()
88 Int_t nbins=100; // number of bins
92 fOutput = new TList();
96 fMult=new TH1F("fMult","Multiplicity",1100,0.,3300);
97 fMult->GetXaxis()->SetTitle("N tracks");
100 fCosPA=new TH1F("fCosPA","Cos(PA) distribution",50,0.9975,1.0005);
101 fCosPA->GetXaxis()->SetTitle("Cos(PA)");
102 fOutput->Add(fCosPA);
104 fDtrDCA=new TH1F("fDtrDCA","DCA between V0 daughters",50,0.0,1.5);
105 fDtrDCA->GetXaxis()->SetTitle("DCA (rel. u.)");
106 fOutput->Add(fDtrDCA);
108 fdEdx=new TH2F("fdEdx","dE/dx",50,0.2,3,50,0.,6.);
111 fdEdxPid=new TH2F("fdEdxPid","dE/dx with PID",50,0.2,3,50,0.,6.);
112 fOutput->Add(fdEdxPid);
115 new TH2F("fK0sM", "Mass for K^{0}_{s}", nbins/2,0.448,0.548,nbins,0.,ptMax);
116 fK0sM->GetXaxis()->SetTitle("Mass (GeV/c)");
120 new TH2F("fK0sSi","L_{T} vs p_{T} for K^{0}_{s}, side-band subtracted",
121 nbins,0.,ptMax,nbins,0.,ltMax);
122 fK0sSi->GetXaxis()->SetTitle("p_{T} (GeV/c)");
123 fK0sSi->GetYaxis()->SetTitle("L_{T} (cm)");
124 fOutput->Add(fK0sSi);
127 new TH2F("fK0sMC","L_{T} vs p_{T} for K^{0}_{s}, from MC stack",
128 nbins,0.,ptMax,nbins,0.,ltMax);
129 fK0sMC->GetXaxis()->SetTitle("p_{T} (GeV/c)");
130 fK0sMC->GetYaxis()->SetTitle("L_{T} (cm)");
131 fOutput->Add(fK0sMC);
134 new TH2F("fK0sAs", "L_{T} vs p_{T} for K^{0}_{s}, associated",
135 nbins,0.,ptMax,nbins,0.,ltMax);
136 fK0sAs->GetXaxis()->SetTitle("p_{T} (GeV/c)");
137 fK0sAs->GetYaxis()->SetTitle("L_{T} (cm)");
138 fOutput->Add(fK0sAs);
140 //----------------------
143 new TH2F("fLambdaM","Mass for \\Lambda", nbins, 1.065, 1.165,nbins,0.,ptMax);
144 fLambdaM->GetXaxis()->SetTitle("Mass (GeV/c)");
145 fOutput->Add(fLambdaM);
148 new TH2F("fLambdaSi","L_{T} vs p_{T} for \\Lambda, side-band subtructed",
149 nbins,0.,ptMax,nbins,0.,ltMax);
150 fLambdaSi->GetXaxis()->SetTitle("p_{T} (GeV/c)");
151 fLambdaSi->GetYaxis()->SetTitle("L_{T} (cm)");
152 fOutput->Add(fLambdaSi);
155 new TH2F("fLambdaMC","L_{T} vs p_{T} for \\Lambda, from MC stack",
156 nbins,0.,ptMax,nbins,0.,ltMax);
157 fLambdaMC->GetXaxis()->SetTitle("p_{T} (GeV/c)");
158 fLambdaMC->GetYaxis()->SetTitle("L_{T} (cm)");
159 fOutput->Add(fLambdaMC);
162 new TH2F("fLambdaAs","L_{T} vs p_{T} for \\Lambda, associated",
163 nbins,0.,ptMax,nbins,0.,ltMax);
164 fLambdaAs->GetXaxis()->SetTitle("p_{T} (GeV/c)");
165 fLambdaAs->GetYaxis()->SetTitle("L_{T} (cm)");
166 fOutput->Add(fLambdaAs);
168 //----------------------
170 fLambdaEff=fLambdaAs->ProjectionX();
171 fLambdaEff->SetName("fLambdaEff");
172 fLambdaEff->SetTitle("Efficiency for #Lambda");
173 fOutput->Add(fLambdaEff);
175 fLambdaPt=fLambdaAs->ProjectionX();
176 fLambdaPt->SetName("fLambdaPt");
177 fLambdaPt->SetTitle("Raw #Lambda pT spectrum");
178 fOutput->Add(fLambdaPt);
180 //----------------------
183 new TH2F("fLambdaBarM","Mass for anti-\\Lambda", nbins, 1.065, 1.165,nbins,0.,ptMax);
184 fLambdaBarM->GetXaxis()->SetTitle("Mass (GeV/c)");
185 fOutput->Add(fLambdaBarM);
188 new TH2F("fLambdaBarSi","L_{T} vs p_{T} for anti-\\Lambda, side-band subtructed",
189 nbins,0.,ptMax,nbins,0.,ltMax);
190 fLambdaBarSi->GetXaxis()->SetTitle("p_{T} (GeV/c)");
191 fLambdaBarSi->GetYaxis()->SetTitle("L_{T} (cm)");
192 fOutput->Add(fLambdaBarSi);
195 new TH2F("fLambdaBarMC","L_{T} vs p_{T} for anti-\\Lambda, from MC stack",
196 nbins,0.,ptMax,nbins,0.,ltMax);
197 fLambdaBarMC->GetXaxis()->SetTitle("p_{T} (GeV/c)");
198 fLambdaBarMC->GetYaxis()->SetTitle("L_{T} (cm)");
199 fOutput->Add(fLambdaBarMC);
202 new TH2F("fLambdaBarAs","L_{T} vs p_{T} for anti-\\Lambda, associated",
203 nbins,0.,ptMax,nbins,0.,ltMax);
204 fLambdaBarAs->GetXaxis()->SetTitle("p_{T} (GeV/c)");
205 fLambdaBarAs->GetYaxis()->SetTitle("L_{T} (cm)");
206 fOutput->Add(fLambdaBarAs);
209 //----------------------
211 fLambdaBarEff=fLambdaBarAs->ProjectionX();
212 fLambdaBarEff->SetName("fLambdaBarEff");
213 fLambdaBarEff->SetTitle("Efficiency for anti-#Lambda");
214 fOutput->Add(fLambdaBarEff);
216 fLambdaBarPt=fLambdaBarAs->ProjectionX();
217 fLambdaBarPt->SetName("fLambdaBarPt");
218 fLambdaBarPt->SetTitle("Raw anti-#Lambda pT spectrum");
219 fOutput->Add(fLambdaBarPt);
221 //----------------------
223 fLambdaFromXi=new TH3F("fLambdaFromXi","L_{T} vs p_{T} vs p_{T} of \\Xi for \\Lambda from \\Xi",
224 nbins,0.,ptMax,nbins,0.,ltMax,33,0.,ptMax+2);
225 fOutput->Add(fLambdaFromXi);
228 new TH2F("fXiM", "\\Xi mass distribution", 50, 1.271, 1.371,33,0.,ptMax+2);
231 fXiSiP = new TH1F("fXiSiP", "Pt for \\Xi, side-band subracted",
233 fOutput->Add(fXiSiP);
236 fLambdaBarFromXiBar=new TH3F("fLambdaBarFromXiBar","L_{T} vs p_{T} vs p_{T} of anti-\\Xi for anti-\\Lambda from anti-\\Xi",
237 nbins,0.,ptMax,nbins,0.,ltMax,33,0.,ptMax+2);
238 fOutput->Add(fLambdaBarFromXiBar);
241 new TH2F("fXiBarM", "anti-\\Xi mass distribution", 50, 1.271, 1.371,33,0.,ptMax+2);
242 fOutput->Add(fXiBarM);
244 fXiBarSiP = new TH1F("fXiBarSiP", "Pt for anti-\\Xi, side-band subracted",
246 fOutput->Add(fXiBarSiP);
249 PostData(1, fOutput);
252 static Bool_t AcceptTrack(const AliAODTrack *t) {
253 if (!t->IsOn(AliAODTrack::kTPCrefit)) return kFALSE;
254 //if (t->GetKinkIndex(0)>0) return kFALSE;
256 Float_t nCrossedRowsTPC = t->GetTPCClusterInfo(2,1);
257 if (nCrossedRowsTPC < 70) return kFALSE;
258 Int_t findable=t->GetTPCNclsF();
259 if (findable <= 0) return kFALSE;
260 if (nCrossedRowsTPC/findable < 0.8) return kFALSE;
262 if (TMath::Abs(t->Eta()) > 0.8) return kFALSE;
268 AliAnalysisTaskCTauPbPbaod::AcceptV0(const AliAODv0 *v0,const AliAODEvent *aod)
270 if (v0->GetOnFlyStatus()) return kFALSE;
272 Double_t cpa=v0->CosPointingAngle(aod->GetPrimaryVertex());
273 if (cpa < fCPA) return kFALSE;
275 Double_t dca=v0->DcaV0Daughters();
276 if (dca > fDCA) return kFALSE;
278 const AliAODTrack *ntrack=(AliAODTrack *)v0->GetDaughter(1);
279 if (!AcceptTrack(ntrack)) return kFALSE;
281 const AliAODTrack *ptrack=(AliAODTrack *)v0->GetDaughter(0);
282 if (!AcceptTrack(ptrack)) return kFALSE;
284 Float_t xy=v0->DcaNegToPrimVertex();
285 if (TMath::Abs(xy)<0.1) return kFALSE;
286 xy=v0->DcaPosToPrimVertex();
287 if (TMath::Abs(xy)<0.1) return kFALSE;
289 Double_t xyz[3]; v0->GetSecondaryVtx(xyz);
290 Double_t r2=xyz[0]*xyz[0] + xyz[1]*xyz[1];
291 if (r2<0.9*0.9) return kFALSE;
292 if (r2>100*100) return kFALSE;
297 static Bool_t AcceptCascade(const AliAODcascade *cs, const AliAODEvent *aod) {
299 AliAODVertex *xi = cs->GetDecayVertexXi();
300 const AliAODTrack *bach=(AliAODTrack *)xi->GetDaughter(0);
301 if (!AcceptTrack(bach)) return kFALSE;
303 Double_t xy=cs->DcaBachToPrimVertex();
304 if (TMath::Abs(xy) < 0.03) return kFALSE;
306 const AliAODVertex *vtx=aod->GetPrimaryVertex();
307 Double_t xv=vtx->GetX(), yv=vtx->GetY(), zv=vtx->GetZ();
308 Double_t cpa=cs->CosPointingAngleXi(xv,yv,zv);
309 if (cpa<0.999) return kFALSE;
311 if (cs->DcaXiDaughters() > 0.3) return kFALSE;
316 static Bool_t AcceptPID(const AliPIDResponse *pidResponse,
317 const AliAODTrack *ptrack, const TClonesArray *stack) {
319 const AliAODPid *pid=ptrack->GetDetPid();
320 if (!pid) return kTRUE;
321 if (pid->GetTPCmomentum() > 1.) return kTRUE;
325 Int_t plab=TMath::Abs(ptrack->GetLabel());
326 AliAODMCParticle *pp=(AliAODMCParticle*)(*stack)[plab];
327 if (!pp) return kTRUE;
328 if (pp->Charge() > 0) {
329 if (pp->GetPdgCode() == kProton) return kTRUE;
331 if (pp->GetPdgCode() == kProtonBar) return kTRUE;
335 Double_t nsig=pidResponse->NumberOfSigmasTPC(ptrack,AliPID::kProton);
336 if (TMath::Abs(nsig) < 3.) return kTRUE;
342 static AliAODMCParticle*
343 AssociateV0(const AliAODTrack *ptrack, const AliAODTrack *ntrack,
344 const TClonesArray *stack, AliAODMCParticle *&mcp) {
346 // Try to associate the V0 with the daughters ptrack and ntrack
347 // with the Monte Carlo
349 if (!stack) return 0;
351 Int_t nlab=TMath::Abs(ntrack->GetLabel());
352 AliAODMCParticle *n=(AliAODMCParticle*)(*stack)[nlab];
355 Int_t plab=TMath::Abs(ptrack->GetLabel());
356 AliAODMCParticle *p=(AliAODMCParticle*)(*stack)[plab];
359 Int_t imp=p->GetMother(); //V0 particle, the mother of the pos. track
360 AliAODMCParticle *p0=(AliAODMCParticle*)(*stack)[imp];
363 Int_t imn=n->GetMother();
364 if (imp != imn) { // Check decays of the daughters
368 Int_t code=p0->GetPdgCode();
369 if (code != kK0Short)
370 if (code != kLambda0)
371 if (code != kLambda0Bar) return 0;
379 void AliAnalysisTaskCTauPbPbaod::UserExec(Option_t *)
381 const Double_t yMax=0.5;
382 const Double_t pMin=0.0;
383 const Double_t lMax=0.001;
385 AliAODEvent *aod=(AliAODEvent *)InputEvent();
388 Printf("ERROR: aod not available");
393 const AliAODVertex *vtx=aod->GetPrimaryVertex();
394 if (vtx->GetNContributors()<3) return;
395 Double_t xv=vtx->GetX(), yv=vtx->GetY(), zv=vtx->GetZ();
397 if (TMath::Abs(zv) > 10.) return ;
401 AliAnalysisManager *mgr= AliAnalysisManager::GetAnalysisManager();
402 AliInputEventHandler *hdr=(AliInputEventHandler*)mgr->GetInputEventHandler();
403 UInt_t maskIsSelected = hdr->IsEventSelected();
404 Bool_t isSelected = (maskIsSelected & AliVEvent::kMB);
405 if (!isSelected) return;
407 fMult->Fill(-100); //event counter
409 // Centrality selection
410 AliCentrality *cent=aod->GetCentrality();
411 if (!cent->IsEventInCentralityClass(fCMin,fCMax,"V0M")) return;
413 AliPIDResponse *pidResponse = hdr->GetPIDResponse();
418 TClonesArray *stack = 0x0;
419 Double_t mcXv=0., mcYv=0., mcZv=0.;
422 TList *lst = aod->GetList();
423 stack = (TClonesArray*)lst->FindObject(AliAODMCParticle::StdBranchName());
425 Printf("ERROR: stack not available");
429 mcHdr=(AliAODMCHeader*)lst->FindObject(AliAODMCHeader::StdBranchName());
431 mcXv=mcHdr->GetVtxX(); mcYv=mcHdr->GetVtxY(); mcZv=mcHdr->GetVtxZ();
433 Int_t ntrk=stack->GetEntriesFast();
435 AliAODMCParticle *p0=(AliAODMCParticle*)stack->UncheckedAt(ntrk);
436 Int_t code=p0->GetPdgCode();
437 if (code != kK0Short)
438 if (code != kLambda0)
439 if (code != kLambda0Bar) continue;
441 Int_t plab=p0->GetDaughter(0), nlab=p0->GetDaughter(1);
442 if (nlab==plab) continue;
443 AliAODMCParticle *part=(AliAODMCParticle*)(*stack)[plab];
445 Double_t charge=part->Charge();
446 if (charge == 0.) continue;
448 Double_t pt=p0->Pt();
449 if (pt<pMin) continue;
450 if (TMath::Abs(p0->Y())>yMax) continue;
452 Double_t x=p0->Xv(), y=p0->Yv(), z=p0->Zv();
453 Double_t dxmc=mcXv-x, dymc=mcYv-y, dzmc=mcZv-z;
454 Double_t l=TMath::Sqrt(dxmc*dxmc + dymc*dymc + dzmc*dzmc);
456 if (l > lMax) continue; // secondary V0
458 x=part->Xv(); y=part->Yv();
459 dxmc=mcXv-x; dymc=mcYv-y;
460 Double_t lt=TMath::Sqrt(dxmc*dxmc + dymc*dymc);
467 fLambdaMC->Fill(pt,lt);
470 fLambdaBarMC->Fill(pt,lt);
479 Int_t ntrk1=aod->GetNumberOfTracks();
481 for (Int_t i=0; i<ntrk1; i++) {
482 AliAODTrack *t=aod->GetTrack(i);
483 if (t->IsMuonTrack()) continue;
484 if (!t->IsOn(AliAODTrack::kTPCrefit)) continue;
487 if (t->GetPosition(xyz)) continue;
488 if (TMath::Abs(xyz[0])>3.) continue;
489 if (TMath::Abs(xyz[1])>3.) continue;
491 Double_t pt=t->Pt(),pz=t->Pz();
492 if (TMath::Abs(pz/pt)>0.8) continue;
496 const AliAODPid *pid=t->GetDetPid();
499 Double_t p=pid->GetTPCmomentum();
500 Double_t dedx=pid->GetTPCsignal()/47.;
501 fdEdx->Fill(p,dedx,1);
503 Double_t nsig=pidResponse->NumberOfSigmasTPC(t,AliPID::kProton);
504 if (TMath::Abs(nsig) < 3.) fdEdxPid->Fill(p,dedx,1);
510 Int_t nv0 = aod->GetNumberOfV0s();
512 AliAODv0 *v0=aod->GetV0(nv0);
514 Double_t pt=TMath::Sqrt(v0->Pt2V0());
515 if (pt < pMin) continue;
517 if (!AcceptV0(v0,aod)) continue;
519 Double_t cpa=v0->CosPointingAngle(aod->GetPrimaryVertex());
522 Double_t dca=v0->DcaV0Daughters();
525 const AliAODTrack *ntrack=(AliAODTrack *)v0->GetDaughter(1);
526 const AliAODTrack *ptrack=(AliAODTrack *)v0->GetDaughter(0);
528 Double_t xyz[3]; v0->GetSecondaryVtx(xyz);
529 Double_t dxv=xyz[0]-xv, dyv=xyz[1]-yv;
530 Double_t lt=TMath::Sqrt(dxv*dxv + dyv*dyv);
532 if (lt/pt > 3*7.89/1.1157) continue;
536 Bool_t isLambda=kTRUE;
537 Bool_t isLambdaBar=kTRUE;
539 if (0.4977*lt/pt > 3*2.68) isK0s=kFALSE;
540 if (1.1157*lt/pt > 3*7.89) isLambdaBar=isLambda=kFALSE;
542 if (!AcceptPID(pidResponse, ptrack, stack)) isLambda=kFALSE;
543 if (!AcceptPID(pidResponse, ntrack, stack)) isLambdaBar=kFALSE;
545 Double_t yK0s=TMath::Abs(v0->RapK0Short());
546 Double_t yLam=TMath::Abs(v0->RapLambda());
547 if (yK0s > yMax) isK0s=kFALSE;
548 if (yLam > yMax) isLambda=isLambdaBar=kFALSE;
551 Double_t mass=0., m=0., s=0.;
553 mass=v0->MassK0Short();
554 fK0sM->Fill(mass,pt);
556 m=TDatabasePDG::Instance()->GetParticle(kK0Short)->Mass();
557 s=0.0044 + (0.008-0.0044)/(10-1)*(pt - 1.);
558 if (TMath::Abs(m-mass) < 3*s) {
563 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
564 fK0sSi->Fill(pt,lt,-1);
566 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
567 fK0sSi->Fill(pt,lt,-1);
572 mass=v0->MassLambda();
573 fLambdaM->Fill(mass,pt);
575 m=TDatabasePDG::Instance()->GetParticle(kLambda0)->Mass();
576 //s=0.0027 + (0.004-0.0027)/(10-1)*(pt-1);
577 //s=0.0015 + (0.002-0.0015)/(2.6-1)*(pt-1);
578 s=0.0023 + (0.004-0.0023)/(6-1)*(pt-1);
579 if (TMath::Abs(m-mass) < 3*s) {
580 fLambdaSi->Fill(pt,lt);
584 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
585 fLambdaSi->Fill(pt,lt,-1);
587 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
588 fLambdaSi->Fill(pt,lt,-1);
593 mass=v0->MassAntiLambda();
594 fLambdaBarM->Fill(mass,pt);
596 m=TDatabasePDG::Instance()->GetParticle(kLambda0Bar)->Mass();
597 //s=0.0027 + (0.004-0.0027)/(10-1)*(pt-1);
598 //s=0.0015 + (0.002-0.0015)/(2.6-1)*(pt-1);
599 s=0.0023 + (0.004-0.0023)/(6-1)*(pt-1);
600 if (TMath::Abs(m-mass) < 3*s) {
601 fLambdaBarSi->Fill(pt,lt);
605 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
606 fLambdaBarSi->Fill(pt,lt,-1);
608 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
609 fLambdaBarSi->Fill(pt,lt,-1);
613 if (!fIsMC) continue;
618 if (!isLambdaBar) continue;//check MC only for the accepted V0s
620 AliAODMCParticle *mcp=0;
621 AliAODMCParticle *mc0=AssociateV0(ptrack,ntrack,stack,mcp);
624 Double_t ptAs=mc0->Pt();
625 if (ptAs < pMin) continue;
626 Double_t yAs=mc0->Y();
627 if (TMath::Abs(yAs) > yMax) continue;
629 Int_t code=mc0->GetPdgCode();
631 Double_t dx = mcXv - mcp->Xv(), dy = mcYv - mcp->Yv();
632 Double_t ltAs=TMath::Sqrt(dx*dx + dy*dy);
634 Double_t dz=mcZv - mc0->Zv(); dy=mcYv - mc0->Yv(); dx=mcXv - mc0->Xv();
635 Double_t l = TMath::Sqrt(dx*dx + dy*dy + dz*dz);
636 if (l<lMax) { // Primary V0s
639 if (isK0s) fK0sAs->Fill(ptAs,ltAs);
642 if (isLambda) fLambdaAs->Fill(ptAs,ltAs);
645 if (isLambdaBar) fLambdaBarAs->Fill(ptAs,ltAs);
650 if (code==kK0Short) continue;
652 Int_t nx=mc0->GetMother();
653 AliAODMCParticle *xi=(AliAODMCParticle*)(*stack)[nx];
655 Int_t xcode=xi->GetPdgCode();
660 if ((xcode==kXiMinus) || (xcode==3322))
661 fLambdaFromXi->Fill(ptAs,ltAs,xi->Pt());
665 if ((xcode==kXiPlusBar)||(xcode==-3322))
666 fLambdaBarFromXiBar->Fill(ptAs,ltAs,xi->Pt());
675 Int_t ncs=aod->GetNumberOfCascades();
676 for (Int_t i=0; i<ncs; i++) {
677 AliAODcascade *cs=aod->GetCascade(i);
679 Double_t pt=TMath::Sqrt(cs->Pt2Xi());
680 if (pt < pMin) continue;
681 if (TMath::Abs(cs->RapXi()) > yMax) continue;
682 if (!AcceptCascade(cs,aod)) continue;
684 const AliAODv0 *v0=(AliAODv0*)cs;
685 if (v0->RapLambda() > yMax) continue;
686 if (!AcceptV0(v0,aod)) continue;
688 //--- Cascade switches
689 Bool_t isXiMinus=kTRUE;
690 Bool_t isXiPlusBar=kTRUE;
692 const AliAODTrack *ptrack=(AliAODTrack *)v0->GetDaughter(0);
693 if (!AcceptPID(pidResponse, ptrack, stack)) isXiMinus=kFALSE;
695 const AliAODTrack *ntrack=(AliAODTrack *)v0->GetDaughter(1);
696 if (!AcceptPID(pidResponse, ntrack, stack)) isXiPlusBar=kFALSE;
698 Int_t charge=cs->ChargeXi();
699 if (charge > 0) isXiMinus=kFALSE;
700 if (charge < 0) isXiPlusBar=kFALSE;
704 Double_t mass=cs->MassXi();
706 Double_t m=TDatabasePDG::Instance()->GetParticle(kXiMinus)->Mass();
708 Double_t s=0.002 + (0.0032-0.002)/(6-1.5)*(pt-1.5);
709 if (TMath::Abs(m-mass) < 3*s) {
714 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
717 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
723 Double_t mass=cs->MassXi();
724 fXiBarM->Fill(mass,pt);
725 Double_t m=TDatabasePDG::Instance()->GetParticle(kXiPlusBar)->Mass();
727 Double_t s=0.002 + (0.0032-0.002)/(6-1.5)*(pt-1.5);
728 if (TMath::Abs(m-mass) < 3*s) {
733 if (TMath::Abs(m-mass + 4.5*s) < 1.5*s) {
734 fXiBarSiP->Fill(pt,-1);
736 if (TMath::Abs(m-mass - 4.5*s) < 1.5*s) {
737 fXiBarSiP->Fill(pt,-1);
741 if (!fIsMC) continue;
745 if (!isXiPlusBar) continue;//check MC only for the accepted cascades
746 // Here is the future association with MC
752 void AliAnalysisTaskCTauPbPbaod::Terminate(Option_t *)
754 // The Terminate() function is the last function to be called during
755 // a query. It always runs on the client, it can be used to present
756 // the results graphically or save the results to file.
758 fOutput=(TList*)GetOutputData(1);
760 Printf("ERROR: fOutput not available");
764 fMult = dynamic_cast<TH1F*>(fOutput->FindObject("fMult")) ;
766 Printf("ERROR: fMult not available");
770 fdEdx = dynamic_cast<TH2F*>(fOutput->FindObject("fdEdx")) ;
772 Printf("ERROR: fdEdx not available");
776 fdEdxPid = dynamic_cast<TH2F*>(fOutput->FindObject("fdEdxPid")) ;
778 Printf("ERROR: fdEdxPid not available");
783 fK0sMC = dynamic_cast<TH2F*>(fOutput->FindObject("fK0sMC")) ;
785 Printf("ERROR: fK0sMC not available");
788 TH1D *k0sMcPx=fK0sMC->ProjectionX(); k0sMcPx->Sumw2();
789 fK0sAs = dynamic_cast<TH2F*>(fOutput->FindObject("fK0sAs")) ;
791 Printf("ERROR: fK0sAs not available");
794 TH1D *k0sAsPx=fK0sAs->ProjectionX();
795 k0sAsPx->Sumw2(); //k0sAsPx->Scale(0.69);
800 fLambdaFromXi = dynamic_cast<TH3F*>(fOutput->FindObject("fLambdaFromXi")) ;
801 if (!fLambdaFromXi) {
802 Printf("ERROR: fLambdaFromXi not available");
805 TH1D *lambdaFromXiPx=fLambdaFromXi->ProjectionX(); lambdaFromXiPx->Sumw2();
807 fLambdaMC = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaMC")) ;
809 Printf("ERROR: fLambdaMC not available");
812 TH1D *lambdaMcPx=fLambdaMC->ProjectionX(); lambdaMcPx->Sumw2();
814 fLambdaAs = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaAs")) ;
816 Printf("ERROR: fLambdaAs not available");
819 TH1D *lambdaAsPx=fLambdaAs->ProjectionX();
820 lambdaAsPx->Sumw2(); //lambdaAsPx->Scale(0.64);
822 fLambdaSi = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaSi")) ;
824 Printf("ERROR: fLambdaSi not available");
827 TH1D *lambdaSiPx=fLambdaSi->ProjectionX();
828 lambdaSiPx->SetName("fLambdaPt");
831 fLambdaEff = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaEff")) ;
833 Printf("ERROR: fLambdaEff not available");
836 fLambdaPt = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaPt")) ;
838 Printf("ERROR: fLambdaPt not available");
843 // anti-Lambda histograms
844 fLambdaBarFromXiBar =
845 dynamic_cast<TH3F*>(fOutput->FindObject("fLambdaBarFromXiBar")) ;
846 if (!fLambdaBarFromXiBar) {
847 Printf("ERROR: fLambdaBarFromXiBar not available");
850 TH1D *lambdaBarFromXiBarPx=
851 fLambdaBarFromXiBar->ProjectionX("Bar"); lambdaBarFromXiBarPx->Sumw2();
853 fLambdaBarMC = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaBarMC")) ;
855 Printf("ERROR: fLambdaBarMC not available");
858 TH1D *lambdaBarMcPx=fLambdaBarMC->ProjectionX(); lambdaBarMcPx->Sumw2();
860 fLambdaBarAs = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaBarAs")) ;
862 Printf("ERROR: fLambdaBarAs not available");
865 TH1D *lambdaBarAsPx=fLambdaBarAs->ProjectionX();
866 lambdaBarAsPx->Sumw2(); //lambdaBarAsPx->Scale(0.64);
868 fLambdaBarSi = dynamic_cast<TH2F*>(fOutput->FindObject("fLambdaBarSi")) ;
870 Printf("ERROR: fLambdaBarSi not available");
873 TH1D *lambdaBarSiPx=fLambdaBarSi->ProjectionX();
874 lambdaBarSiPx->SetName("fLambdaBarPt");
875 lambdaBarSiPx->Sumw2();
877 fLambdaBarEff = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaBarEff")) ;
878 if (!fLambdaBarEff) {
879 Printf("ERROR: fLambdaBarEff not available");
882 fLambdaBarPt = dynamic_cast<TH1D*>(fOutput->FindObject("fLambdaBarPt")) ;
884 Printf("ERROR: fLambdaBarPt not available");
889 if (!gROOT->IsBatch()) {
891 TCanvas *c1 = new TCanvas("c1","Mulitplicity");
895 new TCanvas("c2","dE/dx");
898 new TCanvas("c3","dE/dx with PID");
899 fdEdxPid->DrawCopy() ;
903 TH1D effK(*k0sAsPx); effK.SetTitle("Efficiency for K0s");
904 effK.Divide(k0sAsPx,k0sMcPx,1,1,"b");
905 new TCanvas("c4","Efficiency for K0s");
910 fLambdaEff->Divide(lambdaAsPx,lambdaMcPx,1,1,"b");
911 new TCanvas("c5","Efficiency for #Lambda");
912 fLambdaEff->DrawCopy("E") ;
914 lambdaSiPx->Add(lambdaFromXiPx,-1);
915 lambdaSiPx->Divide(fLambdaEff);
917 new TCanvas("c6","Corrected #Lambda pt");
918 lambdaSiPx->SetTitle("Corrected #Lambda pt");
919 *fLambdaPt = *lambdaSiPx;
920 fLambdaPt->SetLineColor(2);
921 fLambdaPt->DrawCopy("E");
923 lambdaMcPx->DrawCopy("same");
927 fLambdaBarEff->Divide(lambdaBarAsPx,lambdaBarMcPx,1,1,"b");
928 new TCanvas("c7","Efficiency for anti-#Lambda");
929 fLambdaBarEff->DrawCopy("E") ;
931 lambdaBarSiPx->Add(lambdaBarFromXiBarPx,-1);
932 lambdaBarSiPx->Divide(fLambdaBarEff);
934 new TCanvas("c8","Corrected anti-#Lambda pt");
935 lambdaBarSiPx->SetTitle("Corrected anti-#Lambda pt");
936 *fLambdaBarPt = *lambdaBarSiPx;
937 fLambdaBarPt->SetLineColor(2);
938 fLambdaBarPt->DrawCopy("E");
940 lambdaBarMcPx->DrawCopy("same");
942 new TCanvas("c6","Raw #Lambda pt");
943 lambdaSiPx->SetTitle("Raw #Lambda pt");
944 *fLambdaPt = *lambdaSiPx;
945 fLambdaPt->SetLineColor(2);
946 fLambdaPt->DrawCopy("E");
949 new TCanvas("c7","Raw anti-#Lambda pt");
950 lambdaBarSiPx->SetTitle("Raw anti-#Lambda pt");
951 *fLambdaBarPt = *lambdaBarSiPx;
952 fLambdaBarPt->SetLineColor(2);
953 fLambdaBarPt->DrawCopy("E");