1 /**************************************************************************
2 * Author: Paraskevi Ganoti, University of Athens (pganoti@phys.uoa.gr) *
3 * Contributors are mentioned in the code where appropriate. *
5 * Permission to use, copy, modify and distribute this software and its *
6 * documentation strictly for non-commercial purposes is hereby granted *
7 * without fee, provided that the above copyright notice appears in all *
8 * copies and that both the copyright notice and this permission notice *
9 * appear in the supporting documentation. The authors make no claims *
10 * about the suitability of this software for any purpose. It is *
11 * provided "as is" without express or implied warranty. *
12 **************************************************************************/
14 //----------------------------------------------------------------------------------------------------------------
15 // class AliResonanceKink
16 // Example of an analysis task for reconstructing resonances having at least one kaon-kink in their decay
17 // products. It provides basic plots as well as plots helping to calculate the corrections.
18 // Usage: To analyse a resonance having a kaon in its decay products, one has to modify the integer
19 // variables resonancePDG, fdaughter1pdg and fdaughter2pdg accordingly as well as daughter1pdgMass and daughter2pdgMass.
20 // Also, depending on the analysis mode (ESD or MC), fAnalysisType in the constructor must also be changed
21 //-----------------------------------------------------------------------------------------------------------------
24 #include "TParticle.h"
25 #include "TDatabasePDG.h"
29 #include "AliMCEvent.h"
30 #include "AliResonanceKink.h"
31 #include "AliESDkink.h"
33 #include "AliESDtrack.h"
34 #include "AliESDEvent.h"
35 #include "AliExternalTrackParam.h"
36 #include "AliMCParticle.h"
38 ClassImp(AliResonanceKink)
40 //________________________________________________________________________
41 AliResonanceKink::AliResonanceKink()
42 : TObject(), fDebug(0), fListOfHistos(0), fOpeningAngle(0), fInvariantMass(0), fInvMassTrue(0), fPhiBothKinks(0), fetabins(0), floweta(0), fupeta(0), fRecPt(0), fRecEta(0), fRecEtaPt(0), fSimPt(0), fSimEta(0), fSimEtaPt(0), fSimPtKink(0), fSimEtaKink(0), fSimEtaPtKink(0), f1(0), f2(0), fAnalysisType(), fvtxz(0), fNbins(0), fLowX(0), fHighX(0), fdaughter1pdg(0), fdaughter2pdg(0), fresonancePDGcode(0), fMaxNSigmaToVertex(0), fMinPtTrackCut(0), fMaxDCAxy(0), fMaxDCAzaxis(0),
43 fMinTPCclusters(0),fMaxChi2PerTPCcluster(0), fMaxCov0(0), fMaxCov2(0), fMaxCov5(0) , fMaxCov9(0), fMaxCov14(0) //, fTPCrefitFlag(kFALSE)
44 , fInvmassPt(0), fInvmassPtTrue(0), fMCInvmassPt(0), fMCInvmassPtTrue(0), fminKinkRadius(0), fmaxKinkRadius(0), fminQt(0), fmaxQt(0), fptbins(0), flowpt(0), fupperpt(0), fmaxAbsEtaCut(0)
49 //________________________________________________________________________
50 AliResonanceKink::AliResonanceKink(Int_t nbins, Float_t nlowx, Float_t nhighx, Int_t netabins, Float_t nloweta, Float_t nupeta, Int_t nptbins, Float_t nlowpt, Float_t nupperpt, Int_t daughter1, Int_t daughter2, Int_t resonancePDG)
51 : TObject(), fDebug(0), fListOfHistos(0), fOpeningAngle(0), fInvariantMass(0), fInvMassTrue(0), fPhiBothKinks(0), fetabins(netabins), floweta(nloweta), fupeta(nupeta), fRecPt(0), fRecEta(0), fRecEtaPt(0), fSimPt(0), fSimEta(0), fSimEtaPt(0), fSimPtKink(0), fSimEtaKink(0), fSimEtaPtKink(0), f1(0), f2(0), fAnalysisType(), fvtxz(0), fNbins(nbins), fLowX(nlowx), fHighX(nhighx), fdaughter1pdg(daughter1), fdaughter2pdg(daughter2), fresonancePDGcode(resonancePDG), fMaxNSigmaToVertex(0), fMinPtTrackCut(0),
52 fMaxDCAxy(0), fMaxDCAzaxis(0), fMinTPCclusters(0), fMaxChi2PerTPCcluster(0), fMaxCov0(0), fMaxCov2(0), fMaxCov5(0), fMaxCov9(0), fMaxCov14(0) //, fTPCrefitFlag(kFALSE)
53 , fInvmassPt(0), fInvmassPtTrue(0), fMCInvmassPt(0), fMCInvmassPtTrue(0), fminKinkRadius(0), fmaxKinkRadius(0), fminQt(0), fmaxQt(0), fptbins(nptbins), flowpt(nlowpt), fupperpt(nupperpt), fmaxAbsEtaCut(0)
57 fOpeningAngle=new TH1D("fOpeningAngle"," ", 100,-1.0,1.0);
59 fInvariantMass=new TH1D("fInvariantMass"," ",fNbins,fLowX,fHighX);
60 fInvMassTrue=new TH1D("fInvMassTrue"," ",fNbins,fLowX,fHighX);
61 fPhiBothKinks=new TH1D("fPhiBothKinks"," ",fNbins,fLowX,fHighX); // Applicable for phi(1020)
63 fRecPt=new TH1D("fRecPt"," ", nptbins, nlowpt, nupperpt);
64 fRecEta=new TH1D("fRecEta"," ",netabins, nloweta, nupeta);
65 fRecEtaPt=new TH2D("fRecEtaPt"," ", nptbins, nlowpt, nupperpt, netabins, nloweta, nupeta);
66 fSimPt=new TH1D("fSimPt"," ", nptbins, nlowpt, nupperpt);
67 fSimEta=new TH1D("fSimEta"," ", netabins, nloweta, nupeta);
68 fSimEtaPt=new TH2D("fSimEtaPt"," ", nptbins, nlowpt, nupperpt, netabins, nloweta, nupeta);
69 fSimPtKink=new TH1D("fSimPtKink"," ", nptbins, nlowpt, nupperpt);
70 fSimEtaKink=new TH1D("fSimEtaKink"," ", netabins, nloweta, nupeta);
71 fSimEtaPtKink=new TH2D("fSimEtaPtKink"," ", nptbins, nlowpt, nupperpt, netabins, nloweta, nupeta);
73 f1=new TF1("f1","((atan([0]*[1]*(1.0/(sqrt((x^2)*(1.0-([1]^2))-([0]^2)*([1]^2))))))*180.)/[2]",1.1,10.0);
74 f1->SetParameter(0,0.493677);
75 f1->SetParameter(1,0.9127037);
76 f1->SetParameter(2,TMath::Pi());
78 f2=new TF1("f2","((atan([0]*[1]*(1.0/(sqrt((x^2)*(1.0-([1]^2))-([0]^2)*([1]^2))))))*180.)/[2]",0.1,10.0);
79 f2->SetParameter(0,0.13957018);
80 f2->SetParameter(1,0.2731374);
81 f2->SetParameter(2,TMath::Pi());
83 fvtxz=new TH1D("fvtxz"," ", 100,-20.0,20.0);
85 fInvmassPt=new TH2D("fInvmassPt"," ",fNbins,fLowX,fHighX,100,0.0,10.0);
86 fInvmassPtTrue=new TH2D("fInvmassPtTrue"," ",fNbins,fLowX,fHighX,100,0.0,10.0);
87 fMCInvmassPt=new TH2D("fMCInvmassPt"," ",fNbins,fLowX,fHighX,100,0.0,10.0);
88 fMCInvmassPtTrue=new TH2D("fMCInvmassPtTrue"," ",fNbins,fLowX,fHighX,100,0.0,10.0);
91 //________________________________________________________________________
92 AliResonanceKink:: ~AliResonanceKink()
95 if(fOpeningAngle) delete fOpeningAngle;
96 if(fInvariantMass) delete fInvariantMass;
97 if(fInvMassTrue) delete fInvMassTrue;
98 if(fPhiBothKinks) delete fPhiBothKinks;
99 if(fRecPt) delete fRecPt;
100 if(fRecEta) delete fRecEta;
101 if(fRecEtaPt) delete fRecEtaPt;
102 if(fSimPt) delete fSimPt;
103 if(fSimEta) delete fSimEta;
104 if(fSimEtaPt) delete fSimEtaPt;
105 if(fSimPtKink) delete fSimPtKink;
106 if(fSimEtaKink) delete fSimEtaKink;
107 if(fSimEtaPtKink) delete fSimEtaPtKink;
108 if(fvtxz) delete fvtxz;
109 if(fInvmassPt) delete fInvmassPt;
110 if(fInvmassPtTrue) delete fInvmassPtTrue;
111 if(fMCInvmassPt) delete fMCInvmassPt;
112 if(fMCInvmassPtTrue) delete fMCInvmassPtTrue;
114 //________________________________________________________________________
115 TList* AliResonanceKink::GetHistogramList()
117 // Adding histograms to the list
118 fListOfHistos=new TList();
120 fListOfHistos->Add(fOpeningAngle);
121 fListOfHistos->Add(fInvariantMass);
122 fListOfHistos->Add(fInvMassTrue);
123 fListOfHistos->Add(fPhiBothKinks);
124 fListOfHistos->Add(fRecPt);
125 fListOfHistos->Add(fRecEta);
126 fListOfHistos->Add(fRecEtaPt);
127 fListOfHistos->Add(fSimPt);
128 fListOfHistos->Add(fSimEta);
129 fListOfHistos->Add(fSimEtaPt);
130 fListOfHistos->Add(fSimPtKink);
131 fListOfHistos->Add(fSimEtaKink);
132 fListOfHistos->Add(fSimEtaPtKink);
133 fListOfHistos->Add(fvtxz);
134 fListOfHistos->Add(fInvmassPt);
135 fListOfHistos->Add(fInvmassPtTrue);
136 fListOfHistos->Add(fMCInvmassPt);
137 fListOfHistos->Add(fMCInvmassPtTrue);
139 return fListOfHistos;
142 //________________________________________________________________________
143 void AliResonanceKink::InitOutputHistograms(Int_t nbins, Float_t nlowx, Float_t nhighx, Int_t netabins, Float_t nloweta, Float_t nupeta, Int_t nptbins, Float_t nlowpt, Float_t nupperpt)
145 // Initialisation of the output histograms
150 fOpeningAngle=new TH1D("fOpeningAngle"," ", 100,-1.0,1.0);
152 fInvariantMass=new TH1D("fInvariantMass"," ",fNbins,fLowX,fHighX);
153 fInvMassTrue=new TH1D("fInvMassTrue"," ",fNbins,fLowX,fHighX);
154 fPhiBothKinks=new TH1D("fPhiBothKinks"," ",fNbins,fLowX,fHighX); // Applicable for phi(1020)
156 fRecPt=new TH1D("fRecPt"," ", nptbins, nlowpt, nupperpt);
157 fRecEta=new TH1D("fRecEta"," ", netabins, nloweta, nupeta);
158 fRecEtaPt=new TH2D("fRecEtaPt"," ", nptbins, nlowpt, nupperpt, netabins, nloweta, nupeta);
159 fSimPt=new TH1D("fSimPt"," ", nptbins, nlowpt, nupperpt);
160 fSimEta=new TH1D("fSimEta"," ",netabins, nloweta, nupeta);
161 fSimEtaPt=new TH2D("fSimEtaPt"," ", nptbins, nlowpt, nupperpt, netabins, nloweta, nupeta);
162 fSimPtKink=new TH1D("fSimPtKink"," ", nptbins, nlowpt, nupperpt);
163 fSimEtaKink=new TH1D("fSimEtaKink"," ", netabins, nloweta, nupeta);
164 fSimEtaPtKink=new TH2D("fSimEtaPtKink"," ", nptbins, nlowpt, nupperpt, netabins, nloweta, nupeta);
166 f1=new TF1("f1","((atan([0]*[1]*(1.0/(sqrt((x^2)*(1.0-([1]^2))-([0]^2)*([1]^2))))))*180.)/[2]",1.1,10.0);
167 f1->SetParameter(0,0.493677);
168 f1->SetParameter(1,0.9127037);
169 f1->SetParameter(2,TMath::Pi());
171 f2=new TF1("f2","((atan([0]*[1]*(1.0/(sqrt((x^2)*(1.0-([1]^2))-([0]^2)*([1]^2))))))*180.)/[2]",0.1,10.0);
172 f2->SetParameter(0,0.13957018);
173 f2->SetParameter(1,0.2731374);
174 f2->SetParameter(2,TMath::Pi());
176 fvtxz=new TH1D("fvtxz"," ", 100,-20.0,20.0);
178 fInvmassPt=new TH2D("fInvmassPt"," ",fNbins,fLowX,fHighX, nptbins, nlowpt, nupperpt);
179 fInvmassPtTrue=new TH2D("fInvmassPtTrue"," ",fNbins,fLowX,fHighX, nptbins, nlowpt, nupperpt);
180 fMCInvmassPt=new TH2D("fMCInvmassPt"," ",fNbins,fLowX,fHighX,nptbins, nlowpt, nupperpt);
181 fMCInvmassPtTrue=new TH2D("fMCInvmassPtTrue"," ",fNbins,fLowX,fHighX, nptbins, nlowpt, nupperpt);
185 //________________________________________________________________________
186 void AliResonanceKink::Analyse(AliESDEvent* esd, AliMCEvent* mcEvent)
189 // Called for each event
190 Int_t resonancePDGcode, antiresonancePDGcode;
191 Double_t daughter1pdgMass, daughter2pdgMass;
193 if (fdaughter1pdg==kKPlus) {
194 resonancePDGcode=fresonancePDGcode;
195 antiresonancePDGcode=-fresonancePDGcode;
196 daughter1pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter1pdg)->Mass();
197 daughter2pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter2pdg)->Mass();
200 if (fdaughter1pdg!=kKPlus) {
201 resonancePDGcode=-fresonancePDGcode;
202 antiresonancePDGcode=fresonancePDGcode;
203 daughter1pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter2pdg)->Mass();
204 daughter2pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter1pdg)->Mass();
205 } // to ensure that daughter1pdgMass has always the kaon mass
207 if (fdaughter1pdg==fdaughter2pdg) {
208 resonancePDGcode=fresonancePDGcode;
209 antiresonancePDGcode=fresonancePDGcode;
212 Printf("ERROR: esd not available");
219 AliStack* stack=mcEvent->Stack();
221 if(fAnalysisType == "MC") {
223 const AliESDVertex* vertex = GetEventVertex(esd);
229 for (Int_t iMc = 0; iMc < stack->GetNprimary(); ++iMc)
231 TParticle* particle = stack->Particle(iMc);
235 if (fDebug > 0) Printf("UNEXPECTED: particle with label %d not found in stack (mc loop)", iMc);
239 if(TMath::Abs(particle->GetPdgCode())==fresonancePDGcode) {
241 if(particle->GetNDaughters()>2) continue;
243 Int_t firstD=particle->GetFirstDaughter();
244 Int_t lastD=particle->GetLastDaughter();
246 if((firstD<0)||(firstD>=stack->GetNtrack())) continue;
247 if((lastD<0)||(lastD>=stack->GetNtrack())) continue;
249 TParticle *daughterParticle1 = 0;
250 TParticle *daughterParticle2 = 0;
251 AliMCParticle *mcDaughter1 = 0;
252 AliMCParticle *mcDaughter2 = 0;
254 if(fdaughter1pdg==kKPlus) {
255 daughterParticle1=stack->Particle(firstD);
256 daughterParticle2=stack->Particle(lastD);
257 mcDaughter1= (AliMCParticle*) mcEvent->GetTrack(firstD);
258 mcDaughter2= (AliMCParticle*) mcEvent->GetTrack(lastD);
261 if(fdaughter2pdg==kKPlus) {
262 daughterParticle1=stack->Particle(lastD);
263 daughterParticle2=stack->Particle(firstD);
264 mcDaughter1= (AliMCParticle*) mcEvent->GetTrack(lastD);
265 mcDaughter2= (AliMCParticle*) mcEvent->GetTrack(firstD);
266 } //to ensure that the first daughter is always the kaon
268 if(TMath::Abs(daughterParticle1->GetPdgCode())!=321) continue;
270 TParticle * daughters1Daughter=0;
271 TParticle * daughters2Daughter=0;
272 Int_t mcProcessDaughters1Daughter = -999;
273 Int_t mcProcessDaughters2Daughter = -999;
274 AliMCParticle *mcDaughters1Daughter = 0;
276 if(mcDaughter1->Charge()==0) continue;
277 if(mcDaughter2->Charge()==0) continue; //accept resonance decays in two charged daughters
278 Int_t nDecayKaonDaughter=-99;
279 for(Int_t ia=0; ia<daughterParticle1->GetNDaughters(); ia++) {
280 if(((daughterParticle1->GetFirstDaughter()+ia)>0)&&((daughterParticle1->GetFirstDaughter()+ia)<stack->GetNtrack())) {
281 daughters1Daughter=stack->Particle(daughterParticle1->GetFirstDaughter()+ia);
282 mcProcessDaughters1Daughter=daughters1Daughter->GetUniqueID();
283 if(mcProcessDaughters1Daughter==4) {
284 nDecayKaonDaughter=daughterParticle1->GetFirstDaughter()+ia;
290 Int_t nProcessDaughter=-99;
291 for(Int_t ib=0; ib<daughterParticle2->GetNDaughters(); ib++) {
292 if(((daughterParticle2->GetFirstDaughter()+ib)>0)&&((daughterParticle2->GetFirstDaughter()+ib)<stack->GetNtrack())) {
293 daughters2Daughter=stack->Particle(daughterParticle2->GetFirstDaughter()+ib);
294 mcProcessDaughters2Daughter=daughters2Daughter->GetUniqueID();
295 if((mcProcessDaughters2Daughter==4)||(mcProcessDaughters2Daughter==13)) {
296 nProcessDaughter=mcProcessDaughters2Daughter;
302 Int_t numberOfCharged=0;
303 if((mcProcessDaughters1Daughter==4)&&(nDecayKaonDaughter>=0)) {
304 for(Int_t ic=nDecayKaonDaughter; ic<=daughterParticle1->GetLastDaughter(); ic++) {
305 if ((ic>=0)&&(ic<stack->GetNtrack())) mcDaughters1Daughter= dynamic_cast<AliMCParticle*>(mcEvent->GetTrack(ic));
307 if(mcDaughters1Daughter->Charge()!=0) numberOfCharged=numberOfCharged+1;
311 if(numberOfCharged>=2) continue; // leave out kaon decays to more than one charged daughter
312 if ((particle->Pt()>fMinPtTrackCut)&&(TMath::Abs(particle->Eta())<fmaxAbsEtaCut)) {
314 fSimEta->Fill(particle->Eta());
315 fSimEtaPt->Fill(particle->Pt(), particle->Eta());
316 fSimPt->Fill(particle->Pt());
317 fMCInvmassPtTrue->Fill(particle->GetMass(), particle->Pt());
319 if((daughterParticle1->Pt()>fMinPtTrackCut)&&(TMath::Abs(daughterParticle1->Eta())<fmaxAbsEtaCut)&&(daughterParticle2->Pt()>fMinPtTrackCut)&&(TMath::Abs(daughterParticle2->Eta())<fmaxAbsEtaCut)) {
320 if((mcProcessDaughters1Daughter==4)&&(daughters1Daughter->R()>fminKinkRadius)&&(daughters1Daughter->R()<fmaxKinkRadius)&&( (nProcessDaughter<0)||((daughters2Daughter->R()>fminKinkRadius)&&(nProcessDaughter>0)))) { //below are the findable
321 fSimPtKink->Fill(particle->Pt());
322 fSimEtaKink->Fill(particle->Eta());
323 fSimEtaPtKink->Fill(particle->Pt(), particle->Eta());
324 fMCInvmassPt->Fill(particle->GetMass(), particle->Pt());
328 } // for the generated spectra
330 } //for the particular resonance
333 } // end fAnalysisType==MC
335 if(fAnalysisType == "ESD") {
336 const AliESDVertex* vertex = GetEventVertex(esd);
341 Double_t ptrackpos[3], ptrackneg[3];
343 TLorentzVector p4pos, anp4pos;
344 TLorentzVector p4neg, anp4neg;
345 TLorentzVector p4comb, anp4comb;
347 for (Int_t iTracks = 0; iTracks < esd->GetNumberOfTracks(); iTracks++) {
348 AliESDtrack* trackpos = esd->GetTrack(iTracks);
350 if (fDebug > 0) Printf("ERROR: Could not receive track %d", iTracks);
353 if (trackpos->GetSign() < 0) continue;
355 AliExternalTrackParam *tpcTrackpos = (AliExternalTrackParam *)trackpos->GetTPCInnerParam();
356 if(!tpcTrackpos) continue;
357 ptrackpos[0]=tpcTrackpos->Px();
358 ptrackpos[1]=tpcTrackpos->Py();
359 ptrackpos[2]=tpcTrackpos->Pz();
361 Bool_t firstLevelAcceptPosTrack=IsAcceptedForKink(esd, vertex, trackpos);
362 if(firstLevelAcceptPosTrack==kFALSE) continue;
364 TVector3 posTrackMom(ptrackpos[0],ptrackpos[1],ptrackpos[2]);
366 TParticle * partpos = stack->Particle(TMath::Abs(trackpos->GetLabel()));
367 if (!partpos) continue;
368 Int_t pdgpos = partpos->GetPdgCode();
369 Int_t mumlabelpos=partpos->GetFirstMother();
370 mumlabelpos = TMath::Abs(mumlabelpos);
371 TParticle * mumpos=stack->Particle(mumlabelpos);
372 if (!mumpos) continue;
373 Int_t mumpdgpos = mumpos->GetPdgCode();
375 Int_t indexKinkPos=trackpos->GetKinkIndex(0);
377 if(indexKinkPos>0) continue;
379 Bool_t posKaonKinkFlag=0;
382 posKaonKinkFlag=IsKink(esd, indexKinkPos, posTrackMom);
384 if(posKaonKinkFlag==1) anp4pos.SetVectM(posTrackMom,daughter1pdgMass);
385 if(posKaonKinkFlag==0) continue;
388 if(indexKinkPos==0) {
390 Bool_t secondLevelAcceptPosTrack=IsAcceptedForTrack(esd, vertex, trackpos);
391 if(secondLevelAcceptPosTrack==kFALSE) continue;
393 p4pos.SetVectM(posTrackMom, daughter2pdgMass);
397 for (Int_t j=0; j<esd->GetNumberOfTracks(); j++) {
398 if(iTracks==j) continue;
399 AliESDtrack* trackneg=esd->GetTrack(j);
400 if (trackneg->GetSign() > 0) continue;
402 AliExternalTrackParam *tpcTrackneg = (AliExternalTrackParam *)trackneg->GetTPCInnerParam();
403 if(!tpcTrackneg) continue;
404 ptrackneg[0]=tpcTrackneg->Px();
405 ptrackneg[1]=tpcTrackneg->Py();
406 ptrackneg[2]=tpcTrackneg->Pz();
408 Bool_t firstLevelAcceptNegTrack=IsAcceptedForKink(esd, vertex, trackneg);
409 if(firstLevelAcceptNegTrack==kFALSE) continue;
411 TVector3 negTrackMom(ptrackneg[0],ptrackneg[1],ptrackneg[2]);
413 TParticle * partneg = stack->Particle(TMath::Abs(trackneg->GetLabel()));
414 if (!partneg) continue;
415 Int_t pdgneg = partneg->GetPdgCode();
416 Int_t mumlabelneg=partneg->GetFirstMother();
417 mumlabelneg = TMath::Abs(mumlabelneg);
418 TParticle * mumneg=stack->Particle(mumlabelneg);
419 if (!mumneg) continue;
420 Int_t mumpdgneg = mumneg->GetPdgCode();
422 Int_t indexKinkNeg=trackneg->GetKinkIndex(0);
424 if(indexKinkNeg>0) continue;
426 Bool_t negKaonKinkFlag=0;
429 negKaonKinkFlag=IsKink(esd, indexKinkNeg, negTrackMom);
431 if(negKaonKinkFlag==1) p4neg.SetVectM(negTrackMom,daughter1pdgMass);
432 if(negKaonKinkFlag==0) continue;
435 if(indexKinkNeg==0) {
437 Bool_t secondLevelAcceptNegTrack=IsAcceptedForTrack(esd, vertex, trackneg);
438 if(secondLevelAcceptNegTrack==kFALSE) continue;
440 anp4neg.SetVectM(negTrackMom, daughter2pdgMass);
444 Double_t openingAngle=(ptrackpos[0]*ptrackneg[0]+ptrackpos[1]*ptrackneg[1]+ptrackpos[2]*ptrackneg[2])/(posTrackMom.Mag()*negTrackMom.Mag());
446 if((posKaonKinkFlag==1)&&(negKaonKinkFlag==1)) {
449 if((p4comb.Vect().Pt()>fMinPtTrackCut)&&(TMath::Abs(anp4pos.Vect().Eta())<fmaxAbsEtaCut)&&(TMath::Abs(p4neg.Vect().Eta())<fmaxAbsEtaCut)&&(p4comb.Vect().Eta()<fmaxAbsEtaCut)) {
450 if(openingAngle>0.6) fPhiBothKinks->Fill(p4comb.M());
454 if(negKaonKinkFlag==1) {
458 if(p4comb.Vect().Pt()<=fMinPtTrackCut) continue;
460 if((TMath::Abs(p4pos.Vect().Eta())<fmaxAbsEtaCut)&&(TMath::Abs(p4neg.Vect().Eta())<fmaxAbsEtaCut)&&(p4comb.Vect().Eta()<fmaxAbsEtaCut)) {
461 fInvariantMass->Fill(p4comb.M());
462 fInvmassPt->Fill(p4comb.M(), p4comb.Vect().Pt());
463 if ((mumpdgpos==(antiresonancePDGcode))&&(mumpdgneg==(antiresonancePDGcode))&&(mumlabelpos==mumlabelneg)
464 &&(pdgpos==fdaughter2pdg)&&(pdgneg==(-fdaughter1pdg))&&(TMath::Abs(trackpos->GetLabel())>=0)&&(TMath::Abs(trackneg->GetLabel())>=0)&&(mumlabelpos>=0)&&(mumlabelneg>=0)) {
465 fOpeningAngle->Fill(openingAngle);
466 fInvMassTrue->Fill(p4comb.M());
467 fInvmassPtTrue->Fill(p4comb.M(), p4comb.Vect().Pt());
469 fRecPt->Fill(p4comb.Vect().Pt());
470 fRecEta->Fill(p4comb.Vect().Eta());
471 fRecEtaPt->Fill(p4comb.Vect().Perp(),p4comb.Vect().Eta());
479 if(posKaonKinkFlag==1) {
483 if(anp4comb.Vect().Pt()<=fMinPtTrackCut) continue;
485 if((TMath::Abs(anp4neg.Vect().Eta())<fmaxAbsEtaCut)&&(TMath::Abs(anp4pos.Vect().Eta())<fmaxAbsEtaCut)&&(anp4comb.Vect().Eta()<fmaxAbsEtaCut)) {
486 fInvariantMass->Fill(anp4comb.M());
487 fInvmassPt->Fill(anp4comb.M(), anp4comb.Vect().Pt());
488 if ((mumpdgpos==resonancePDGcode)&&(mumpdgneg==resonancePDGcode)&&(mumlabelpos==mumlabelneg)
489 &&(pdgpos==fdaughter1pdg)&&(pdgneg==(-fdaughter2pdg))&&(TMath::Abs(trackpos->GetLabel())>=0)&&(TMath::Abs(trackneg->GetLabel())>=0)&&(mumlabelpos>=0) &&(mumlabelneg>=0)) {
490 fOpeningAngle->Fill(openingAngle);
491 fInvMassTrue->Fill(anp4comb.M());
492 fInvmassPtTrue->Fill(anp4comb.M(), anp4comb.Vect().Pt());
494 fRecPt->Fill(anp4comb.Vect().Pt());
495 fRecEta->Fill(anp4comb.Vect().Eta());
496 fRecEtaPt->Fill(anp4comb.Vect().Pt(), anp4comb.Vect().Eta());
507 } // end fAnalysisType == ESD
511 //____________________________________________________________________//
512 void AliResonanceKink::Analyse(AliESDEvent* esd)
515 // Called for each event
516 Double_t daughter1pdgMass, daughter2pdgMass;
518 if (fdaughter1pdg==kKPlus) {
519 daughter1pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter1pdg)->Mass();
520 daughter2pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter2pdg)->Mass();
523 if (fdaughter1pdg!=kKPlus) {
524 daughter1pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter2pdg)->Mass();
525 daughter2pdgMass=TDatabasePDG::Instance()->GetParticle(fdaughter1pdg)->Mass();
526 } // to ensure that daughter1pdgMass has always the kaon mass
529 Printf("ERROR: esd not available");
533 if(fAnalysisType == "DATA") {
534 const AliESDVertex* vertex = GetEventVertex(esd);
539 Double_t ptrackpos[3], ptrackneg[3];
541 TLorentzVector p4pos, anp4pos;
542 TLorentzVector p4neg, anp4neg;
543 TLorentzVector p4comb, anp4comb;
545 for (Int_t iTracks = 0; iTracks < esd->GetNumberOfTracks(); iTracks++) {
546 AliESDtrack* trackpos = esd->GetTrack(iTracks);
548 if (fDebug > 0) Printf("ERROR: Could not receive track %d", iTracks);
551 if (trackpos->GetSign() < 0) continue;
553 AliExternalTrackParam *tpcTrackpos = (AliExternalTrackParam *)trackpos->GetTPCInnerParam();
554 if(!tpcTrackpos) continue;
555 ptrackpos[0]=tpcTrackpos->Px();
556 ptrackpos[1]=tpcTrackpos->Py();
557 ptrackpos[2]=tpcTrackpos->Pz();
559 Bool_t firstLevelAcceptPosTrack=IsAcceptedForKink(esd, vertex, trackpos);
560 if(firstLevelAcceptPosTrack==kFALSE) continue;
562 TVector3 posTrackMom(ptrackpos[0],ptrackpos[1],ptrackpos[2]);
564 Int_t indexKinkPos=trackpos->GetKinkIndex(0);
566 if(indexKinkPos>0) continue;
568 Bool_t posKaonKinkFlag=0;
571 posKaonKinkFlag=IsKink(esd, indexKinkPos, posTrackMom);
573 if(posKaonKinkFlag==1) anp4pos.SetVectM(posTrackMom,daughter1pdgMass);
574 if(posKaonKinkFlag==0) continue;
577 if(indexKinkPos==0) {
579 Bool_t secondLevelAcceptPosTrack=IsAcceptedForTrack(esd, vertex, trackpos);
580 if(secondLevelAcceptPosTrack==kFALSE) continue;
582 p4pos.SetVectM(posTrackMom, daughter2pdgMass);
586 for (Int_t j=0; j<esd->GetNumberOfTracks(); j++) {
587 if(iTracks==j) continue;
588 AliESDtrack* trackneg=esd->GetTrack(j);
589 if (trackneg->GetSign() > 0) continue;
591 AliExternalTrackParam *tpcTrackneg = (AliExternalTrackParam *)trackneg->GetTPCInnerParam();
592 if(!tpcTrackneg) continue;
593 ptrackneg[0]=tpcTrackneg->Px();
594 ptrackneg[1]=tpcTrackneg->Py();
595 ptrackneg[2]=tpcTrackneg->Pz();
597 Bool_t firstLevelAcceptNegTrack=IsAcceptedForKink(esd, vertex, trackneg);
598 if(firstLevelAcceptNegTrack==kFALSE) continue;
600 TVector3 negTrackMom(ptrackneg[0],ptrackneg[1],ptrackneg[2]);
602 Int_t indexKinkNeg=trackneg->GetKinkIndex(0);
604 if(indexKinkNeg>0) continue;
606 Bool_t negKaonKinkFlag=0;
609 negKaonKinkFlag=IsKink(esd, indexKinkNeg, negTrackMom);
611 if(negKaonKinkFlag==1) p4neg.SetVectM(negTrackMom,daughter1pdgMass);
612 if(negKaonKinkFlag==0) continue;
615 if(indexKinkNeg==0) {
617 Bool_t secondLevelAcceptNegTrack=IsAcceptedForTrack(esd, vertex, trackneg);
618 if(secondLevelAcceptNegTrack==kFALSE) continue;
620 anp4neg.SetVectM(negTrackMom, daughter2pdgMass);
624 Double_t openingAngle=(ptrackpos[0]*ptrackneg[0]+ptrackpos[1]*ptrackneg[1]+ptrackpos[2]*ptrackneg[2])/(posTrackMom.Mag()*negTrackMom.Mag());
626 if((posKaonKinkFlag==1)&&(negKaonKinkFlag==1)) {
629 if((p4comb.Vect().Pt()>fMinPtTrackCut)&&(TMath::Abs(anp4pos.Vect().Eta())<fmaxAbsEtaCut)&&(TMath::Abs(p4neg.Vect().Eta())<fmaxAbsEtaCut)&&(p4comb.Vect().Eta()<fmaxAbsEtaCut)) {
630 if(openingAngle>0.6) fPhiBothKinks->Fill(p4comb.M());
634 if(negKaonKinkFlag==1) {
638 if(p4comb.Vect().Pt()<=fMinPtTrackCut) continue;
640 if((TMath::Abs(p4pos.Vect().Eta())<fmaxAbsEtaCut)&&(TMath::Abs(p4neg.Vect().Eta())<fmaxAbsEtaCut)&&(p4comb.Vect().Eta()<fmaxAbsEtaCut)) {
641 fInvariantMass->Fill(p4comb.M());
642 fInvmassPt->Fill(p4comb.M(), p4comb.Vect().Pt());
643 fRecPt->Fill(p4comb.Vect().Pt());
644 fRecEta->Fill(p4comb.Vect().Eta());
645 fRecEtaPt->Fill(p4comb.Vect().Perp(),p4comb.Vect().Eta());
649 if(posKaonKinkFlag==1) {
653 if(anp4comb.Vect().Pt()<=fMinPtTrackCut) continue;
655 if((TMath::Abs(anp4neg.Vect().Eta())<fmaxAbsEtaCut)&&(TMath::Abs(anp4pos.Vect().Eta())<fmaxAbsEtaCut)&&(anp4comb.Vect().Eta()<fmaxAbsEtaCut)) {
656 fInvariantMass->Fill(anp4comb.M());
657 fInvmassPt->Fill(anp4comb.M(), anp4comb.Vect().Pt());
658 fRecPt->Fill(anp4comb.Vect().Pt());
659 fRecEta->Fill(anp4comb.Vect().Eta());
660 fRecEtaPt->Fill(anp4comb.Vect().Pt(), anp4comb.Vect().Eta());
669 } // end fAnalysisType == DATA
672 //____________________________________________________________________//
673 Float_t AliResonanceKink::GetSigmaToVertex(AliESDtrack* esdTrack) const {
674 // Calculates the number of sigma to the vertex.
680 esdTrack->GetImpactParametersTPC(b,bCov);
682 if (bCov[0]<=0 || bCov[2]<=0) {
683 bCov[0]=0; bCov[2]=0;
686 bRes[0] = TMath::Sqrt(bCov[0]);
687 bRes[1] = TMath::Sqrt(bCov[2]);
689 if (bRes[0] == 0 || bRes[1] ==0) return -1;
691 Float_t d = TMath::Sqrt(TMath::Power(b[0]/bRes[0],2) + TMath::Power(b[1]/bRes[1],2));
693 if (TMath::Exp(-d * d / 2) < 1e-10) return 1000;
695 d = TMath::ErfInverse(1 - TMath::Exp(-d * d / 2)) * TMath::Sqrt(2);
700 //________________________________________________________________________
701 const AliESDVertex* AliResonanceKink::GetEventVertex(const AliESDEvent* esd) const
705 const AliESDVertex* vertex = esd->GetPrimaryVertex();
707 if((vertex->GetStatus()==kTRUE)&&(vertex->GetNContributors()>2)) return vertex;
710 vertex = esd->GetPrimaryVertexSPD();
711 if((vertex->GetStatus()==kTRUE)&&(vertex->GetNContributors()>2)) return vertex;
717 //________________________________________________________________________
719 Bool_t AliResonanceKink::IsAcceptedForKink(AliESDEvent *localesd,
720 const AliESDVertex *localvertex, AliESDtrack* localtrack) {
721 // Apply the selections for each kink
723 Double_t gPt = 0.0, gPx = 0.0, gPy = 0.0, gPz = 0.0;
724 Double_t dca[2] = {0.0,0.0}, cov[3] = {0.0,0.0,0.0}; //The impact parameters and their covariance.
725 Double_t dca3D = 0.0;
727 AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)localtrack->GetTPCInnerParam();
729 gPt = 0.0; gPx = 0.0; gPy = 0.0; gPz = 0.0;
730 dca[0] = -100.; dca[1] = -100.; dca3D = -100.;
731 cov[0] = -100.; cov[1] = -100.; cov[2] = -100.;
734 gPt = tpcTrack->Pt();
735 gPx = tpcTrack->Px();
736 gPy = tpcTrack->Py();
737 gPz = tpcTrack->Pz();
738 tpcTrack->PropagateToDCA(localvertex,
739 localesd->GetMagneticField(),100.,dca,cov);
742 if(GetSigmaToVertex(localtrack) > fMaxNSigmaToVertex) {
743 if (fDebug > 1) Printf("IsAcceptedKink: Track rejected because it has a %lf sigmas to vertex TPC (max. requested: %lf)", GetSigmaToVertex(localtrack),fMaxNSigmaToVertex);
747 if(TMath::Abs(dca[0]) > fMaxDCAxy) {
748 if (fDebug > 1) Printf("IsAcceptedKink: Track rejected because it has a value of dca(xy) (TPC) of %lf (max. requested: %lf)", TMath::Abs(dca[0]), fMaxDCAxy);
752 if(TMath::Abs(dca[1]) > fMaxDCAzaxis) {
753 if (fDebug > 1) Printf("IsAcceptedKink: Track rejected because it has a value of dca(z) of %lf (max. requested: %lf)", TMath::Abs(dca[1]), fMaxDCAzaxis);
757 if(gPt <= fMinPtTrackCut) {
758 if (fDebug > 1) Printf("IsAcceptedKink: Track rejected because it has a min value of pt of %lf (min. requested: %lf)", gPt, fMinPtTrackCut);
765 //________________________________________________________________________
766 Bool_t AliResonanceKink::IsAcceptedForTrack(AliESDEvent *localesd, const AliESDVertex *localvertex, AliESDtrack *localtrack) {
767 // Apply the selections for each track
769 Double_t gPt = 0.0, gPx = 0.0, gPy = 0.0, gPz = 0.0;
770 Double_t dca[2] = {0.0,0.0}, cov[3] = {0.0,0.0,0.0}; //The impact parameters and their covariance.
771 Double_t dca3D = 0.0;
773 AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)localtrack->GetTPCInnerParam();
775 gPt = 0.0; gPx = 0.0; gPy = 0.0; gPz = 0.0;
776 dca[0] = -100.; dca[1] = -100.; dca3D = -100.;
777 cov[0] = -100.; cov[1] = -100.; cov[2] = -100.;
780 gPt = tpcTrack->Pt();
781 gPx = tpcTrack->Px();
782 gPy = tpcTrack->Py();
783 gPz = tpcTrack->Pz();
784 tpcTrack->PropagateToDCA(localvertex,
785 localesd->GetMagneticField(),100.,dca,cov);
789 Int_t nClustersTPC=localtrack->GetTPCclusters(fcls);
790 Float_t chi2perTPCcluster=-1.0;
791 if(nClustersTPC!=0) chi2perTPCcluster=(localtrack->GetTPCchi2())/Float_t(nClustersTPC);
794 localtrack->GetExternalCovariance(extCov);
796 if((localtrack->GetStatus() & AliESDtrack::kTPCrefit) == 0) {
797 if (fDebug > 1) Printf("IsAccepted: Track rejected because of no refited in TPC");
801 if(nClustersTPC < fMinTPCclusters) {
802 if (fDebug > 1) Printf("IsAccepted: Track rejected because it has a value of nclusters (TPC) of %d (min. requested: %d)", nClustersTPC, fMinTPCclusters);
806 if(chi2perTPCcluster > fMaxChi2PerTPCcluster) {
807 if (fDebug > 1) Printf("IsAccepted: Track rejected because it has a value of chi2perTPCcluster of %lf (max. requested: %lf)", chi2perTPCcluster, fMaxChi2PerTPCcluster);
811 if(extCov[0] > fMaxCov0) {
812 if (fDebug > 1) Printf("IsAccepted: Track rejected because it has a value of cov[0] of %lf (max. requested: %lf)", extCov[0], fMaxCov0);
816 if(extCov[2] > fMaxCov2) {
817 if (fDebug > 1) Printf("IsAccepted: Track rejected because it has a value of cov[2] of %lf (max. requested: %lf)", extCov[2], fMaxCov2);
821 if(extCov[5] > fMaxCov5) {
822 if (fDebug > 1) Printf("IsAccepted: Track rejected because it has a value of cov[5] of %lf (max. requested: %lf)", extCov[5], fMaxCov5);
826 if(extCov[9] > fMaxCov9) {
827 if (fDebug > 1) Printf("IsAccepted: Track rejected because it has a value of cov[9] of %lf (max. requested: %lf)", extCov[9], fMaxCov9);
831 if(extCov[14] > fMaxCov14) {
832 if (fDebug > 1) Printf("IsAccepted: Track rejected because it has a value of cov[14] of %lf (max. requested: %lf)", extCov[14], fMaxCov14);
840 //________________________________________________________________________
841 Bool_t AliResonanceKink::IsKink(AliESDEvent *localesd, Int_t kinkIndex, TVector3 trackMom)
843 // Test some kinematical criteria for each kink
845 AliESDkink *kink=localesd->GetKink(TMath::Abs(kinkIndex)-1);
846 const TVector3 motherMfromKink(kink->GetMotherP());
847 const TVector3 daughterMKink(kink->GetDaughterP());
848 Float_t qt=kink->GetQt();
850 Double_t maxDecAngKmu=f1->Eval(motherMfromKink.Mag(),0.,0.,0.);
851 Double_t maxDecAngpimu=f2->Eval(motherMfromKink.Mag(),0.,0.,0.);
853 Float_t kinkAngle=TMath::RadToDeg()*kink->GetAngle(2);
855 Float_t energyDaughterMu=TMath::Sqrt(daughterMKink.Mag()*daughterMKink.Mag()+0.105658*0.105658);
856 Float_t p1XM= motherMfromKink.Px();
857 Float_t p1YM= motherMfromKink.Py();
858 Float_t p1ZM= motherMfromKink.Pz();
859 Float_t p2XM= daughterMKink.Px();
860 Float_t p2YM= daughterMKink.Py();
861 Float_t p2ZM= daughterMKink.Pz();
862 Float_t p3Daughter=TMath::Sqrt(((p1XM-p2XM)*(p1XM-p2XM))+((p1YM-p2YM)*(p1YM-p2YM))+((p1ZM-p2ZM)*(p1ZM-p2ZM)));
863 Double_t invariantMassKmu= TMath::Sqrt((energyDaughterMu+p3Daughter)*(energyDaughterMu+p3Daughter)-motherMfromKink.Mag()*motherMfromKink.Mag());
865 if((kinkAngle>maxDecAngpimu)&&(qt>fminQt)&&(qt<fmaxQt)&&((kink->GetR()>fminKinkRadius)&&(kink->GetR()<fmaxKinkRadius))&&(TMath::Abs(trackMom.Eta())<fmaxAbsEtaCut)&&(invariantMassKmu<0.6)) {
867 if(trackMom.Mag()<=1.1) {
871 if (kinkAngle<maxDecAngKmu) {