1 /**************************************************************************
2 * Copyright(c) 1998-2010, 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 *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 /////////////////////////////////////////////////////////////
18 // Class for cuts on AOD reconstructed DStar->Kpipi
20 // Author: A.Grelli, alessandro.grelli@uu.nl
21 /////////////////////////////////////////////////////////////
23 #include <TDatabasePDG.h>
24 #include <Riostream.h>
26 #include "AliAODRecoDecayHF2Prong.h"
27 #include "AliAODRecoCascadeHF.h"
28 #include "AliRDHFCutsD0toKpi.h"
29 #include "AliRDHFCutsDStartoKpipi.h"
30 #include "AliAODTrack.h"
31 #include "AliESDtrack.h"
32 #include "AliAODVertex.h"
33 #include "AliESDVertex.h"
37 ClassImp(AliRDHFCutsDStartoKpipi)
39 //--------------------------------------------------------------------------
40 AliRDHFCutsDStartoKpipi::AliRDHFCutsDStartoKpipi(const char* name) :
45 // Default Constructor
50 TString varNames[14]={
60 "inv. mass half width of D* [GeV]",
61 "half width of (M_Kpipi-M_D0) [GeV]",
62 "PtMin of pi_s [GeV/c]",
63 "PtMax of pi_s [GeV/c]",
64 "theta, angle between the pi_s and decay plane of the D0 [rad]"};
65 Bool_t isUpperCut[14]={
80 SetVarNames(nvars,varNames,isUpperCut);
96 SetVarsForOpt(5,forOpt);
97 Float_t limits[2]={0,999999999.};
100 //--------------------------------------------------------------------------
101 AliRDHFCutsDStartoKpipi::AliRDHFCutsDStartoKpipi(const AliRDHFCutsDStartoKpipi &source) :
109 if(source.GetTrackCutsSoftPi()) AddTrackCutsSoftPi(source.GetTrackCutsSoftPi());
112 //--------------------------------------------------------------------------
113 AliRDHFCutsDStartoKpipi &AliRDHFCutsDStartoKpipi::operator=(const AliRDHFCutsDStartoKpipi &source)
116 // assignment operator
118 if(&source == this) return *this;
120 AliRDHFCuts::operator=(source);
122 if(source.GetTrackCutsSoftPi()) AddTrackCutsSoftPi(source.GetTrackCutsSoftPi());
127 //---------------------------------------------------------------------------
128 void AliRDHFCutsDStartoKpipi::GetCutVarsForOpt(AliAODRecoDecayHF *d,Float_t *vars,Int_t nvars,Int_t *pdgdaughters) {
130 // Fills in vars the values of the variables
132 if(nvars!=fnVarsForOpt) {
133 printf("AliRDHFCutsDStartoKpipi::GetCutsVarsForOpt: wrong number of variables\n");
138 AliAODRecoCascadeHF* dstarD0pi = (AliAODRecoCascadeHF*)d;
140 AliAODTrack *softPi = (AliAODTrack*)dstarD0pi->GetBachelor();
142 AliAODRecoDecayHF2Prong* dd = (AliAODRecoDecayHF2Prong*)dstarD0pi->Get2Prong();
147 if(TMath::Abs(pdgdaughters[0])==211) {
148 vars[iter]=dd->InvMassD0();
150 vars[iter]=dd->InvMassD0bar();
155 vars[iter]=dd->GetDCA();
159 if(TMath::Abs(pdgdaughters[0])==211) {
160 vars[iter] = dd->CosThetaStarD0();
162 vars[iter] = dd->CosThetaStarD0bar();
167 if(TMath::Abs(pdgdaughters[0])==321) {
168 vars[iter]=dd->PtProng(0);
171 vars[iter]=dd->PtProng(1);
176 if(TMath::Abs(pdgdaughters[0])==211) {
177 vars[iter]=dd->PtProng(0);
180 vars[iter]=dd->PtProng(1);
185 if(TMath::Abs(pdgdaughters[0])==321) {
186 vars[iter]=dd->Getd0Prong(0);
189 vars[iter]=dd->Getd0Prong(1);
194 if(TMath::Abs(pdgdaughters[0])==211) {
195 vars[iter]=dd->Getd0Prong(0);
198 vars[iter]=dd->Getd0Prong(1);
203 vars[iter]= dd->Prodd0d0();
207 vars[iter]=dd->CosPointingAngle();
211 vars[iter]=dstarD0pi->InvMassDstarKpipi();
215 vars[iter]=dstarD0pi->DeltaInvMass();
219 vars[iter] = softPi->Pt();
223 vars[iter] = softPi->Pt();
227 vars[iter] =dstarD0pi->AngleD0dkpPisoft();
232 //---------------------------------------------------------------------------
233 Int_t AliRDHFCutsDStartoKpipi::IsSelected(TObject* obj,Int_t selectionLevel) {
235 // Apply selection for D*.
238 cout<<"Cut matrice not inizialized. Exit..."<<endl;
242 AliAODRecoCascadeHF* d = (AliAODRecoCascadeHF*)obj;
244 cout<<"AliAODRecoCascadeHF null"<<endl;
248 AliAODRecoDecayHF2Prong* dd = (AliAODRecoDecayHF2Prong*)d->Get2Prong();
250 cout<<"AliAODRecoDecayHF2Prong null"<<endl;
254 AliAODTrack *b = (AliAODTrack*)d->GetBachelor();
256 // selection on daughter tracks
257 if(selectionLevel==AliRDHFCuts::kAll ||
258 selectionLevel==AliRDHFCuts::kTracks) {
259 if(!AreDaughtersSelected(dd)) return 0;
260 if(fTrackCutsSoftPi) {
261 AliAODVertex *vAOD = d->GetPrimaryVtx();
262 Double_t pos[3],cov[6];
264 vAOD->GetCovarianceMatrix(cov);
265 const AliESDVertex vESD(pos,cov,100.,100);
266 if(!IsDaughterSelected(b,&vESD,fTrackCutsSoftPi)) return 0;
272 // selection on candidate
273 if(selectionLevel==AliRDHFCuts::kAll ||
274 selectionLevel==AliRDHFCuts::kCandidate) {
277 Int_t ptbin=PtBin(pt);
279 // select D0 that passes D* cuts
280 returnvalue = IsD0FromDStarSelected(pt,dd,selectionLevel);
281 //if(retunvalue==0) return 0;
283 if((b->Charge()==+1 && returnvalue==2) || (b->Charge()==-1 && returnvalue==1)) return 0;
285 // DStarMass and D0mass
286 Double_t mDSPDG = TDatabasePDG::Instance()->GetParticle(413)->Mass();
287 Double_t mD0PDG = TDatabasePDG::Instance()->GetParticle(421)->Mass();
289 Double_t deltaPDG = mDSPDG-mD0PDG;
291 // Half width DStar mass
292 if(TMath::Abs(mDSPDG - (d->InvMassDstarKpipi()))>fCutsRD[GetGlobalIndex(9,ptbin)]) return 0;
293 // Half width Delta mass
295 if(TMath::Abs(deltaPDG-(d->DeltaInvMass())) > fCutsRD[GetGlobalIndex(10,ptbin)]) return 0;
297 // cut on soft pion pt
298 if(b->Pt() < fCutsRD[GetGlobalIndex(11,ptbin)] || b->Pt() > fCutsRD[GetGlobalIndex(12,ptbin)]) return 0;
299 // cut on the angle between D0 decay plane and soft pion
300 if(d->AngleD0dkpPisoft() > fCutsRD[GetGlobalIndex(13,ptbin)]) return 0;
306 //_________________________________________________________________________________________________
307 Int_t AliRDHFCutsDStartoKpipi::IsD0FromDStarSelected(Double_t pt, TObject* obj,Int_t selectionLevel) const {
309 // Apply selection for D0 from D*. The selection in on D0 prongs
313 cout<<"Cut matrice not inizialized. Exit..."<<endl;
317 AliAODRecoDecayHF2Prong* dd = (AliAODRecoDecayHF2Prong*)obj;
320 cout<<"AliAODRecoDecayHF2Prong null"<<endl;
324 // selection on daughter tracks is done in IsSelected()
328 // selection on candidate
329 if(selectionLevel==AliRDHFCuts::kAll ||
330 selectionLevel==AliRDHFCuts::kCandidate) {
333 Double_t mD0PDG = TDatabasePDG::Instance()->GetParticle(421)->Mass();
336 Int_t ptbin=PtBin(pt);
338 Double_t mD0,mD0bar,ctsD0,ctsD0bar;
344 if(dd->PtProng(1) < fCutsRD[GetGlobalIndex(3,ptbin)] || dd->PtProng(0) < fCutsRD[GetGlobalIndex(4,ptbin)]) okD0 = 0;
345 if(dd->PtProng(0) < fCutsRD[GetGlobalIndex(3,ptbin)] || dd->PtProng(1) < fCutsRD[GetGlobalIndex(4,ptbin)]) okD0bar = 0;
347 if(!okD0 && !okD0bar) return 0;
349 if(TMath::Abs(dd->Getd0Prong(1)) > fCutsRD[GetGlobalIndex(5,ptbin)] ||
350 TMath::Abs(dd->Getd0Prong(0)) > fCutsRD[GetGlobalIndex(6,ptbin)]) okD0 = 0;
351 if(TMath::Abs(dd->Getd0Prong(0)) > fCutsRD[GetGlobalIndex(6,ptbin)] ||
352 TMath::Abs(dd->Getd0Prong(1)) > fCutsRD[GetGlobalIndex(5,ptbin)]) okD0bar = 0;
353 if(!okD0 && !okD0bar) return 0;
355 if(dd->GetDCA() > fCutsRD[GetGlobalIndex(1,ptbin)]) return 0;
357 dd->InvMassD0(mD0,mD0bar);
358 if(TMath::Abs(mD0-mD0PDG) > fCutsRD[GetGlobalIndex(0,ptbin)]) okD0 = 0;
359 if(TMath::Abs(mD0bar-mD0PDG) > fCutsRD[GetGlobalIndex(0,ptbin)]) okD0bar = 0;
360 if(!okD0 && !okD0bar) return 0;
362 dd->CosThetaStarD0(ctsD0,ctsD0bar);
363 if(TMath::Abs(ctsD0) > fCutsRD[GetGlobalIndex(2,ptbin)]) okD0 = 0;
364 if(TMath::Abs(ctsD0bar) > fCutsRD[GetGlobalIndex(2,ptbin)]) okD0bar = 0;
365 if(!okD0 && !okD0bar) return 0;
367 if(dd->Prodd0d0() > fCutsRD[GetGlobalIndex(7,ptbin)]) return 0;
369 if(dd->CosPointingAngle() < fCutsRD[GetGlobalIndex(8,ptbin)]) return 0;
371 if (okD0) returnvalue=1; //cuts passed as D0
372 if (okD0bar) returnvalue=2; //cuts passed as D0bar
373 if (okD0 && okD0bar) returnvalue=3; //both
376 //if((Charge()==+1 && !okD0) || (Charge()==-1 && !okD0bar)) return kFALSE;