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@pd.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"
25 #include "AliTPCPIDResponse.h"
26 #include "AliITSPIDResponse.h"
27 #include "AliTOFPIDResponse.h"
28 #include "AliAODpidUtil.h"
29 #include "AliESDtrack.h"
34 //------------------------------
35 AliAODPidHF::AliAODPidHF():
53 // Default constructor
55 fPLimit=new Double_t[fnPLimit];
56 fnSigma=new Double_t[fnNSigma];
57 fPriors=new Double_t[fnPriors];
59 for(Int_t i=0;i<fnNSigma;i++){
62 for(Int_t i=0;i<fnPriors;i++){
65 for(Int_t i=0;i<fnPLimit;i++){
70 //----------------------
71 AliAODPidHF::~AliAODPidHF()
74 // if(fPLimit) delete fPLimit;
75 // if(fnSigma) delete fnSigma;
76 // if(fPriors) delete fPriors;
78 //------------------------
79 AliAODPidHF::AliAODPidHF(const AliAODPidHF& pid) :
81 fnNSigma(pid.fnNSigma),
83 fTOFSigma(pid.fTOFSigma),
84 fnPriors(pid.fnPriors),
86 fnPLimit(pid.fnPLimit),
97 for(Int_t i=0;i<5;i++){
98 fPriors[i]=pid.fPriors[i];
103 //----------------------
104 Int_t AliAODPidHF::RawSignalPID(AliAODTrack *track, TString detector) const{
105 // raw PID for single detectors, returns the particle type with smaller sigma
107 if(detector.Contains("ITS")) return ApplyPidITSRaw(track,specie);
108 if(detector.Contains("TPC")) return ApplyPidTPCRaw(track,specie);
109 if(detector.Contains("TOF")) return ApplyPidTOFRaw(track,specie);
114 //---------------------------
115 Bool_t AliAODPidHF::IsKaonRaw(AliAODTrack *track, TString detector) const{
116 // checks if the track can be a kaon, raw PID applied for single detectors
119 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,3);
120 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,3);
121 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,3);
123 if(specie==3) return kTRUE;
126 //---------------------------
127 Bool_t AliAODPidHF::IsPionRaw (AliAODTrack *track, TString detector) const{
128 // checks if the track can be a pion, raw PID applied for single detectors
132 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,2);
133 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,2);
134 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,2);
136 if(specie==2) return kTRUE;
139 //---------------------------
140 Bool_t AliAODPidHF::IsProtonRaw (AliAODTrack *track, TString detector) const{
141 // checks if the track can be a proton raw PID applied for single detectors
144 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,4);
145 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,4);
146 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,4);
148 if(specie==4) return kTRUE;
152 //--------------------------
153 Bool_t AliAODPidHF::IsElectronRaw(AliAODTrack *track, TString detector) const{
154 // checks if the track can be an electron raw PID applied for single detectors
157 if(detector.Contains("ITS")) specie=ApplyPidITSRaw(track,0);
158 if(detector.Contains("TPC")) specie=ApplyPidTPCRaw(track,0);
159 if(detector.Contains("TOF")) specie=ApplyPidTOFRaw(track,0);
161 if(specie==0) return kTRUE;
165 //--------------------------
166 Int_t AliAODPidHF::ApplyPidTPCRaw(AliAODTrack *track,Int_t specie) const{
167 // n-sigma cut, TPC PID
169 if(!CheckStatus(track,"TPC")) return 0;
170 AliAODPid *pidObj = track->GetDetPid();
172 Double_t dedx=pidObj->GetTPCsignal();
173 Double_t mom = pidObj->GetTPCmomentum();
174 AliTPCPIDResponse tpcResponse;
176 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
177 Double_t nsigmaMax=fnSigma[0];
178 for(Int_t ipart=0;ipart<5;ipart++){
179 AliPID::EParticleType type=AliPID::EParticleType(ipart);
180 Double_t nsigma = TMath::Abs(tpcResponse.GetNumberOfSigmas(mom,dedx,track->GetTPCNcls(),type));
181 if((nsigma<nsigmaMax) && (nsigma<fnSigma[0])) {
186 }else{ // asks only for one particle specie
187 AliPID::EParticleType type=AliPID::EParticleType(specie);
188 Double_t nsigma = TMath::Abs(tpcResponse.GetNumberOfSigmas(mom,dedx,track->GetTPCNcls(),type));
189 if (nsigma>fnSigma[0]) {
199 //----------------------------
200 Int_t AliAODPidHF::ApplyPidITSRaw(AliAODTrack *track,Int_t specie) const{
201 // truncated mean, ITS PID
203 if(!CheckStatus(track,"ITS")) return 0;
205 Double_t mom=track->P();
206 AliAODPid *pidObj = track->GetDetPid();
208 Double_t dedx=pidObj->GetITSsignal();
209 AliITSPIDResponse itsResponse;
211 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
212 Double_t nsigmaMax=fnSigma[4];
213 for(Int_t ipart=0;ipart<5;ipart++){
214 AliPID::EParticleType type=AliPID::EParticleType(ipart);
215 Double_t nsigma = TMath::Abs(itsResponse.GetNumberOfSigmas(mom,dedx,type));
216 if((nsigma<nsigmaMax) && (nsigma<fnSigma[4])) {
221 }else{ // asks only for one particle specie
222 AliPID::EParticleType type=AliPID::EParticleType(specie);
223 Double_t nsigma = TMath::Abs(itsResponse.GetNumberOfSigmas(mom,dedx,type));
224 if (nsigma>fnSigma[4]) {
232 //----------------------------
233 Int_t AliAODPidHF::ApplyPidTOFRaw(AliAODTrack *track,Int_t specie) const{
234 // n-sigma cut, TOF PID
236 if(!CheckStatus(track,"TOF")) return 0;
238 Double_t time[AliPID::kSPECIESN];
239 AliAODPid *pidObj = track->GetDetPid();
240 pidObj->GetIntegratedTimes(time);
241 Double_t sigTOF=pidObj->GetTOFsignal();
242 // AliTOFPIDResponse tofResponse;
245 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
246 Double_t nsigmaMax=fTOFSigma*fnSigma[3];
247 for(Int_t ipart=0;ipart<5;ipart++){
248 //AliPID::EParticleType type=AliPID::EParticleType(ipart);
249 //Double_t nsigma = tofResponse.GetExpectedSigma(track->P(),time[type],AliPID::ParticleMass(type));
250 Double_t nsigma=TMath::Abs(sigTOF-time[ipart]);
251 if((nsigma<nsigmaMax) && (nsigma<fnSigma[3]*fTOFSigma)) {
256 }else{ // asks only for one particle specie
257 //AliPID::EParticleType type=AliPID::EParticleType(specie);
258 //Double_t nsigma = TMath::Abs(tofResponse.GetExpectedSigma(track->P(),time[type],AliPID::ParticleMass(type)));
259 Double_t nsigma=TMath::Abs(sigTOF-time[specie]);
260 if (nsigma>fnSigma[3]*fTOFSigma) {
269 //------------------------------
270 void AliAODPidHF::CombinedProbability(AliAODTrack *track,Bool_t *type) const{
271 // combined PID stored inside the AOD track
273 const Double_t *pid=track->PID();
276 for (Int_t i=0; i<10; i++) {
277 if (pid[i]>max) {k=i; max=pid[i];}
280 if(k==2) type[0]=kTRUE;
281 if(k==3) type[1]=kTRUE;
282 if(k==4) type[2]=kTRUE;
286 //--------------------
287 void AliAODPidHF::BayesianProbability(AliAODTrack *track,Double_t *pid) const{
288 // bayesian PID for single detectors or combined
290 if(fITS && !fTPC && !fTOF) {BayesianProbabilityITS(track,pid);return;}
291 if(fTPC && !fITS && !fTOF) {BayesianProbabilityTPC(track,pid);return;}
292 if(fTOF && !fITS && !fTPC) {BayesianProbabilityTOF(track,pid);return;}
294 Double_t probITS[5]={1.,1.,1.,1.,1.};
295 Double_t probTPC[5]={1.,1.,1.,1.,1.};
296 Double_t probTOF[5]={1.,1.,1.,1.,1.};
297 if(fITS) BayesianProbabilityITS(track,probITS);
298 if(fTPC) BayesianProbabilityTPC(track,probTPC);
299 if(fTOF) BayesianProbabilityTOF(track,probTOF);
300 Double_t probTot[5]={0.,0.,0.,0.,0.};
301 for(Int_t i=0;i<5;i++){
302 probTot[i]=probITS[i]*probTPC[i]*probTOF[i];
304 for(Int_t i2=0;i2<5;i2++){
305 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]);
311 //------------------------------------
312 void AliAODPidHF::BayesianProbabilityITS(AliAODTrack *track,Double_t *prob) const{
314 // bayesian PID for ITS
316 Double_t itspid[AliPID::kSPECIES];
317 pid.MakeITSPID(track,itspid);
318 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
319 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]);
324 //------------------------------------
325 void AliAODPidHF::BayesianProbabilityTPC(AliAODTrack *track,Double_t *prob) const{
326 // bayesian PID for TPC
329 Double_t tpcpid[AliPID::kSPECIES];
330 pid.MakeTPCPID(track,tpcpid);
331 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
333 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]);
341 //------------------------------------
342 void AliAODPidHF::BayesianProbabilityTOF(AliAODTrack *track,Double_t *prob) const{
343 // bayesian PID for TOF
346 Double_t tofpid[AliPID::kSPECIES];
347 pid.MakeTOFPID(track,tofpid);
348 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
349 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]);
354 //---------------------------------
355 void AliAODPidHF::BayesianProbabilityTRD(AliAODTrack *track,Double_t *prob) const{
356 // bayesian PID for TRD
359 Double_t trdpid[AliPID::kSPECIES];
360 pid.MakeTRDPID(track,trdpid);
361 for(Int_t ind=0;ind<AliPID::kSPECIES;ind++){
363 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]);
371 //--------------------------------
372 Bool_t AliAODPidHF::CheckStatus(AliAODTrack *track,TString detectors) const{
374 // Quality cuts on the tracks, detector by detector
376 if(detectors.Contains("ITS")){
377 if ((track->GetStatus()&AliESDtrack::kITSin)==0) return kFALSE;
378 UChar_t clumap=track->GetITSClusterMap();
379 Int_t nPointsForPid=0;
380 for(Int_t i=2; i<6; i++){
381 if(clumap&(1<<i)) ++nPointsForPid;
383 if(nPointsForPid<3) return kFALSE;// track not to be used for PID purposes
386 if(detectors.Contains("TPC")){
387 if ((track->GetStatus()&AliESDtrack::kTPCin )==0) return kFALSE;
388 UShort_t nTPCClus=track->GetTPCClusterMap().CountBits();
389 if (nTPCClus<70) return kFALSE;
392 if(detectors.Contains("TOF")){
393 if ((track->GetStatus()&AliESDtrack::kTOFout )==0) return kFALSE;
394 if ((track->GetStatus()&AliESDtrack::kTIME )==0) return kFALSE;
395 if ((track->GetStatus()&AliESDtrack::kTOFpid )==0) return kFALSE;
399 if(detectors.Contains("TRD")){
400 if ((track->GetStatus()&AliESDtrack::kTRDout )==0) return kFALSE;
401 AliAODPid *pidObj = track->GetDetPid();
402 Float_t *mom=pidObj->GetTRDmomentum();
404 for(Int_t iPl=0;iPl<6;iPl++){
405 if(mom[iPl]>0.) ntracklets++;
407 if(ntracklets<4) return kFALSE;
412 //--------------------------------------------
413 Bool_t AliAODPidHF::TPCRawAsym(AliAODTrack* track,Int_t specie) const{
414 // TPC nsigma cut PID, different sigmas in different p bins
416 if(!CheckStatus(track,"TPC")) return kFALSE;
417 AliAODPid *pidObj = track->GetDetPid();
418 Double_t mom = pidObj->GetTPCmomentum();
419 Double_t dedx=pidObj->GetTPCsignal();
421 AliTPCPIDResponse tpcResponse;
422 AliPID::EParticleType type=AliPID::EParticleType(specie);
423 Double_t nsigma = TMath::Abs(tpcResponse.GetNumberOfSigmas(mom,dedx,track->GetTPCNcls(),type));
425 if(mom<fPLimit[0] && nsigma<fnSigma[0]) return kTRUE;
426 if(mom<fPLimit[1] && mom>fPLimit[0] && nsigma<fnSigma[1]) return kTRUE;
427 if(mom>fPLimit[1] && nsigma<fnSigma[2]) return kTRUE;
432 Int_t AliAODPidHF::MatchTPCTOF(AliAODTrack *track,Int_t mode,Int_t specie,Bool_t compat){
433 // combination of the PID info coming from TPC and TOF
435 //TOF || TPC (a la' Andrea R.)
437 // for the single detectors: -1 = kFALSE, 1 = kTRUE, 0 = compatible
438 // the method returns the sum of the response of the 2 detectors
439 if(fTPC && fTOF) {if(!CheckStatus(track,"TPC") && !CheckStatus(track,"TOF")) return 0;}
444 if(CheckStatus(track,"TPC")) {
446 if(TPCRawAsym(track,specie)) {
452 if(specie==2 && IsPionRaw(track,"TPC")) {
457 if(specie==3 && IsKaonRaw(track,"TPC")) {
462 if(specie==4 && IsProtonRaw(track,"TPC")) {
471 if(compat && tTPCinfo<0){
472 Double_t sig0tmp=fnSigma[0];
474 if(specie==2 && IsPionRaw(track,"TPC")) tTPCinfo=0;
475 if(specie==3 && IsKaonRaw(track,"TPC")) tTPCinfo=0;
476 if(specie==4 && IsProtonRaw(track,"TPC")) tTPCinfo=0;
485 if(!CheckStatus(track,"TOF") && fTPC) return tTPCinfo;
489 if(specie==2 && IsPionRaw(track,"TOF")) tTOFinfo=1;
490 if(specie==3 && IsKaonRaw(track,"TOF")) tTOFinfo=1;
491 if(specie==4 && IsProtonRaw(track,"TOF")) tTOFinfo=1;
493 if(compat && tTOFinfo>0){
494 Double_t ptrack=track->P();
495 if(ptrack>1.5) tTOFinfo=0;
498 return tTPCinfo+tTOFinfo;
501 //TPC & TOF (a la' Yifei)
502 // convention: -1 = kFALSE, 1 = kTRUE, 0 = not identified
505 if(fTPC && CheckStatus(track,"TPC")) {
508 if(!TPCRawAsym(track,specie)) tTPCinfo=-1;
510 if(specie==2 && !IsPionRaw(track,"TPC")) tTPCinfo=-1;
511 if(specie==3 && !IsKaonRaw(track,"TPC")) tTPCinfo=-1;
512 if(specie==4 && !IsProtonRaw(track,"TPC")) tTPCinfo=-1;
518 if(fTPC && !CheckStatus(track,"TOF")) return tTPCinfo;
520 if(specie==2 && !IsPionRaw(track,"TOF")) tTOFinfo=-1;
521 if(specie==3 && !IsKaonRaw(track,"TOF")) tTOFinfo=-1;
522 if(specie==4 && !IsProtonRaw(track,"TOF")) tTOFinfo=-1;
524 if(tTOFinfo==1 && tTPCinfo==1) return 1;
531 //TPC for p<fPLimit[0], TOF for p>=fPLimit[0] (a la' Andrea A.)
532 // convention (temporary): -1 = kFALSE, 1 = kTRUE, 0 = not identified
534 if(fTPC && fTOF) if(!CheckStatus(track,"TPC") && !CheckStatus(track,"TOF")) return 0;
536 Double_t ptrack=track->P();
541 if(ptrack<fPLimit[0] && fTPC) {
542 if(!CheckStatus(track,"TPC")) return 0;
544 if(TPCRawAsym(track,specie)) tTPCinfo=1;
546 if(specie==2 && IsPionRaw(track,"TPC")) tTPCinfo=1;
547 if(specie==3 && IsKaonRaw(track,"TPC")) tTPCinfo=1;
548 if(specie==4 && IsProtonRaw(track,"TPC")) tTPCinfo=1;
554 if(ptrack>=fPLimit[0] && fTOF){
555 if(!CheckStatus(track,"TOF")) return 0;
556 if(specie==2 && IsPionRaw(track,"TOF")) tTOFinfo=1;
557 if(specie==3 && IsKaonRaw(track,"TOF")) tTOFinfo=1;
558 if(specie==4 && IsProtonRaw(track,"TOF")) tTOFinfo=1;
567 //----------------------------------
568 Int_t AliAODPidHF::MakeRawPid(AliAODTrack *track, Int_t specie){
569 // general method to compute PID
571 return MatchTPCTOF(track,fMatch,specie,fCompat);
573 if(fTPC && !fTOF && !fITS) {
574 Int_t tTPCres=ApplyPidTPCRaw(track,specie);
575 if(tTPCres==specie){return 1;}else{return tTPCres;};
577 AliError("You should enable just one detector if you don't want to match");
580 if(fTOF && !fTPC && !fITS) {
581 Int_t tTOFres=ApplyPidTOFRaw(track,specie);
582 if(tTOFres==specie){return 1;}else{return tTOFres;};
584 AliError("You should enable just one detector if you don't want to match");
588 if(fITS && !fTPC && !fTOF) {
589 Int_t tITSres=ApplyPidITSRaw(track,specie);
590 if(tITSres==specie){return 1;}else{return tITSres;};
592 AliError("You should enable just one detector if you don't want to match");