1 /**************************************************************************
2 * Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
8 * Permission to use, copy, modify and distribute this software and its *
9 * documentation strictly for non-commercial purposes is hereby granted *
10 * without fee, provided that the above copyright notice appears in all *
11 * copies and that both the copyright notice and this permission notice *
12 * appear in the supporting documentation. The authors make no claims *
13 * about the suitability of this software for any purpose. It is *
14 * provided "as is" without express or implied warranty. *
15 * *************************************************************************/
17 //***********************************************************
19 // class for PID with AliAODRecoDecayHF
20 // Authors: D. Caffarri caffarri@bo.infn.it, A.Dainese andrea.dainese@pd.infn.it, S. Dash dash@to.infn.it, F. Prino prino@to.infn.it, R. Romita r.romita@gsi.de, Y. Wang yifei@pi0.physi.uni-heidelberg.de
21 //***********************************************************
22 #include "AliAODPidHF.h"
23 #include "AliAODPid.h"
24 #include "AliAODTrack.h"
26 #include "AliTPCPIDResponse.h"
27 #include "AliITSPIDResponse.h"
28 #include "AliTOFPIDResponse.h"
29 #include "AliAODpidUtil.h"
30 #include "AliESDtrack.h"
35 //------------------------------
36 AliAODPidHF::AliAODPidHF():
41 // Default constructor
45 //----------------------
46 AliAODPidHF::~AliAODPidHF()
50 //------------------------
51 AliAODPidHF::AliAODPidHF(const AliAODPidHF& pid) :
57 for(Int_t i=0;i<5;i++){
58 fPriors[i]=pid.fPriors[i];
63 //----------------------
64 Int_t AliAODPidHF::RawSignalPID(AliAODTrack *track, TString detector){
67 if(detector.Contains("ITS")) return ApplyPidITSRaw(track,specie);
68 if(detector.Contains("TPC")) return ApplyPidTPCRaw(track,specie);
69 if(detector.Contains("TOF")) return ApplyPidTOFRaw(track,specie);
74 //---------------------------
75 Bool_t AliAODPidHF::IsKaonRaw (AliAODTrack *track, TString detector){
79 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,3);
80 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,3);
81 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,3);
83 if(specie==3) return kTRUE;
86 //---------------------------
87 Bool_t AliAODPidHF::IsPionRaw (AliAODTrack *track, TString detector){
91 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,2);
92 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,2);
93 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,2);
95 if(specie==2) return kTRUE;
98 //---------------------------
99 Bool_t AliAODPidHF::IsProtonRaw (AliAODTrack *track, TString detector){
102 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,4);
103 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,4);
104 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,4);
106 if(specie==4) return kTRUE;
110 //--------------------------
111 Bool_t AliAODPidHF::IsElectronRaw (AliAODTrack *track, TString detector){
114 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,0);
115 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,0);
116 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,0);
118 if(specie==0) return kTRUE;
122 //--------------------------
123 Int_t AliAODPidHF::ApplyPidTPCRaw(AliAODTrack *track,Int_t specie){
125 if(!CheckStatus(track,"TPC")) return -1;
126 AliAODPid *pidObj = track->GetDetPid();
128 Double_t dedx=pidObj->GetTPCsignal();
129 Double_t mom = pidObj->GetTPCmomentum();
130 AliTPCPIDResponse tpcResponse;
132 if(specie<0){ // from RawSignalPID : should return the particle specie to wich the de/dx is closer to the bethe-block curve -> performance to be checked
133 Double_t nsigmaMax=fSigma;
134 for(Int_t ipart=0;ipart<5;ipart++){
135 AliPID::EParticleType type=AliPID::EParticleType(ipart);
136 Double_t nsigma = TMath::Abs(tpcResponse.GetNumberOfSigmas(mom,dedx,track->GetTPCNcls(),type));
137 if((nsigma<nsigmaMax) && (nsigma<fSigma)) {
142 }else{ // asks only for one particle specie
143 AliPID::EParticleType type=AliPID::EParticleType(specie);
144 Double_t nsigma = TMath::Abs(tpcResponse.GetNumberOfSigmas(mom,dedx,track->GetTPCNcls(),type));
155 //----------------------------
156 Int_t AliAODPidHF::ApplyPidITSRaw(AliAODTrack *track,Int_t specie){
158 if(!CheckStatus(track,"ITS")) return -1;
160 Double_t mom=track->P();
161 AliAODPid *pidObj = track->GetDetPid();
163 Double_t dedx=pidObj->GetITSsignal();
164 AliITSPIDResponse itsResponse;
166 if(specie<0){ // from RawSignalPID : should return the particle specie to wich the de/dx is closer to the bethe-block curve -> performance to be checked
167 Double_t nsigmaMax=fSigma;
168 for(Int_t ipart=0;ipart<5;ipart++){
169 AliPID::EParticleType type=AliPID::EParticleType(ipart);
170 Double_t nsigma = TMath::Abs(itsResponse.GetNumberOfSigmas(mom,dedx,type));
171 if((nsigma<nsigmaMax) && (nsigma<fSigma)) {
176 }else{ // asks only for one particle specie
177 AliPID::EParticleType type=AliPID::EParticleType(specie);
178 Double_t nsigma = TMath::Abs(itsResponse.GetNumberOfSigmas(mom,dedx,type));
187 //----------------------------
188 Int_t AliAODPidHF::ApplyPidTOFRaw(AliAODTrack *track,Int_t specie){
190 if(!CheckStatus(track,"TOF")) return -1;
192 Double_t time[AliPID::kSPECIESN];
193 AliAODPid *pidObj = track->GetDetPid();
194 pidObj->GetIntegratedTimes(time);
195 AliTOFPIDResponse tofResponse;
198 if(specie<0){ // from RawSignalPID : should return the particle specie to wich the de/dx is closer to the bethe-block curve -> performance to be checked
199 Double_t nsigmaMax=fSigma;
200 for(Int_t ipart=0;ipart<5;ipart++){
201 AliPID::EParticleType type=AliPID::EParticleType(ipart);
202 Double_t nsigma = tofResponse.GetExpectedSigma(track->P(),time[type],AliPID::ParticleMass(type));
203 if((nsigma<nsigmaMax) && (nsigma<fSigma)) {
208 }else{ // asks only for one particle specie
209 AliPID::EParticleType type=AliPID::EParticleType(specie);
210 Double_t nsigma = TMath::Abs(tofResponse.GetExpectedSigma(track->P(),time[type],AliPID::ParticleMass(type)));
220 //------------------------------
221 void AliAODPidHF::CombinedProbability(AliAODTrack *track,Bool_t *type){
223 const Double_t *pid=track->PID();
226 for (Int_t i=0; i<10; i++) {
227 if (pid[i]>max) {k=i; max=pid[i];}
230 if(k==2) type[0]=kTRUE;
231 if(k==3) type[1]=kTRUE;
232 if(k==4) type[2]=kTRUE;
236 //--------------------
237 void AliAODPidHF::BayesianProbability(AliAODTrack *track,TString detectors,Double_t *pid){
239 if(detectors.Contains("ITS")) {BayesianProbabilityITS(track,pid);return;}
240 if(detectors.Contains("TPC")) {BayesianProbabilityTPC(track,pid);return;}
241 if(detectors.Contains("TOF")) {BayesianProbabilityTOF(track,pid);return;}
243 if(detectors.Contains("All")) {
244 Double_t probITS[5]={0.,0.,0.,0.,0.};
245 Double_t probTPC[5]={0.,0.,0.,0.,0.};
246 Double_t probTOF[5]={0.,0.,0.,0.,0.};
247 BayesianProbabilityITS(track,probITS);
248 BayesianProbabilityTPC(track,probTPC);
249 BayesianProbabilityTOF(track,probTOF);
250 Double_t probTot[5]={0.,0.,0.,0.,0.};
251 for(Int_t i=0;i<5;i++){
252 probTot[i]=probITS[i]*probTPC[i]*probTOF[i];
254 for(Int_t i2=0;i2<5;i2++){
255 pid[i2]=probTot[i2]*fPriors[i2]/(probTot[0]*fPriors[0]+probTot[1]*fPriors[1]+probTot[2]*fPriors[2]+probTot[3]*fPriors[3]+probTot[4]*fPriors[4]);
262 //------------------------------------
263 void AliAODPidHF::BayesianProbabilityITS(AliAODTrack *track,Double_t *prob){
266 Double_t itspid[AliPID::kSPECIES];
267 pid.MakeITSPID(track,itspid);
268 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
269 prob[ind]=itspid[ind]*fPriors[ind]/(itspid[0]*fPriors[0]+itspid[1]*fPriors[1]+itspid[2]*fPriors[2]+itspid[3]*fPriors[3]+itspid[4]*fPriors[4]);
274 //------------------------------------
275 void AliAODPidHF::BayesianProbabilityTPC(AliAODTrack *track,Double_t *prob){
278 Double_t tpcpid[AliPID::kSPECIES];
279 pid.MakeTPCPID(track,tpcpid);
280 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
282 prob[ind]=tpcpid[ind]*fPriors[ind]/(tpcpid[0]*fPriors[0]+tpcpid[1]*fPriors[1]+tpcpid[2]*fPriors[2]+tpcpid[3]*fPriors[3]+tpcpid[4]*fPriors[4]);
290 //------------------------------------
291 void AliAODPidHF::BayesianProbabilityTOF(AliAODTrack *track,Double_t *prob){
294 Double_t tofpid[AliPID::kSPECIES];
295 //pid.MakeTOFPID(track,tofpid);
296 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
297 prob[ind]=tofpid[ind]*fPriors[ind]/(tofpid[0]*fPriors[0]+tofpid[1]*fPriors[1]+tofpid[2]*fPriors[2]+tofpid[3]*fPriors[3]+tofpid[4]*fPriors[4]);
302 //---------------------------------
303 void AliAODPidHF::BayesianProbabilityTRD(AliAODTrack *track,Double_t *prob){
306 Double_t trdpid[AliPID::kSPECIES];
307 pid.MakeTRDPID(track,trdpid);
308 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
310 prob[ind]=trdpid[ind]*fPriors[ind]/(trdpid[0]*fPriors[0]+trdpid[1]*fPriors[1]+trdpid[2]*fPriors[2]+trdpid[3]*fPriors[3]+trdpid[4]*fPriors[4]);
318 //--------------------------------
319 Bool_t AliAODPidHF::CheckStatus(AliAODTrack *track,TString detectors){
322 if(detectors.Contains("ITS")){
323 if ((track->GetStatus()&AliESDtrack::kITSin)==0) return kFALSE;
324 UChar_t clumap=track->GetITSClusterMap();
325 Int_t nPointsForPid=0;
326 for(Int_t i=2; i<6; i++){
327 if(clumap&(1<<i)) ++nPointsForPid;
329 if(nPointsForPid<3) return kFALSE;// track not to be used for PID purposes
332 if(detectors.Contains("TPC")){
333 if ((track->GetStatus()&AliESDtrack::kTPCin )==0) return kFALSE;
334 UShort_t nTPCClus=track->GetTPCClusterMap().CountBits();
335 if (nTPCClus<70) return kFALSE;
338 if(detectors.Contains("TOF")){
339 if ((track->GetStatus()&AliESDtrack::kTOFout )==0) return kFALSE;
340 if ((track->GetStatus()&AliESDtrack::kTIME )==0) return kFALSE;
341 if ((track->GetStatus()&AliESDtrack::kTOFpid )==0) return kFALSE;
345 if(detectors.Contains("TRD")){
346 if ((track->GetStatus()&AliESDtrack::kTRDout )==0) return kFALSE;
347 AliAODPid *pidObj = track->GetDetPid();
348 Float_t *mom=pidObj->GetTRDmomentum();
350 for(Int_t iPl=0;iPl<6;iPl++){
351 if(mom[iPl]>0.) ntracklets++;
353 if(ntracklets<4) return kFALSE;