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1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16
17//-----------------------------------------------------------------
18// Base class for combining PID of different detectors //
19// (user selected) and compute Bayesian probabilities //
20// //
21// //
22// Origin: Pietro Antonioli, INFN-BO Pietro.Antonioli@cern.ch //
23// //
24//-----------------------------------------------------------------
25
26#include <TH1.h>
27
28#include <AliVTrack.h>
29#include <AliLog.h>
30#include <AliPID.h>
31#include <AliPIDResponse.h>
32
33#include "AliPIDCombined.h"
34
35#include "TMath.h"
36#include "TFile.h"
37
38#include "AliOADBContainer.h"
39
40// initialize static members
41TH2F* AliPIDCombined::fDefaultPriorsTPC[]={0x0};
42TH2F* AliPIDCombined::fDefaultPriorsTPCpPb[]={0x0};
43Float_t AliPIDCombined::fTOFmismProb = 0;
44
45ClassImp(AliPIDCombined);
46
47AliPIDCombined::AliPIDCombined():
48 TNamed("CombinedPID","CombinedPID"),
49 fDetectorMask(0),
50 fRejectMismatchMask(0x7F),
51 fEnablePriors(kTRUE),
52 fSelectedSpecies(AliPID::kSPECIES),
53 fUseDefaultTPCPriors(kFALSE)
54{
55 //
56 // default constructor
57 //
58 for (Int_t i=0;i<AliPID::kSPECIESC;i++) fPriorsDistributions[i]=NULL;
59 AliLog::SetClassDebugLevel("AliPIDCombined",10);
60}
61
62//-------------------------------------------------------------------------------------------------
63AliPIDCombined::AliPIDCombined(const TString& name,const TString& title):
64 TNamed(name,title),
65 fDetectorMask(0),
66 fRejectMismatchMask(0x7F),
67 fEnablePriors(kTRUE),
68 fSelectedSpecies(AliPID::kSPECIES),
69 fUseDefaultTPCPriors(kFALSE)
70{
71 //
72 // default constructor with name and title
73 //
74 for (Int_t i=0;i<AliPID::kSPECIESC;i++) fPriorsDistributions[i]=NULL;
75 AliLog::SetClassDebugLevel("AliPIDCombined",10);
76
77}
78
79//-------------------------------------------------------------------------------------------------
80AliPIDCombined::~AliPIDCombined() {
81
82 for(Int_t i=0;i < AliPID::kSPECIESC;i++){
83 if(fPriorsDistributions[i])
84 delete fPriorsDistributions[i];
85 }
86}
87
88//-------------------------------------------------------------------------------------------------
89void AliPIDCombined::SetPriorDistribution(AliPID::EParticleType type,TH1F *prior) {
90 if ( (type < 0) || ( type >= ((AliPID::EParticleType)AliPID::kSPECIESC) ) ){
91 AliError(Form("Invalid EParticleType setting prior (offending type: %d)",type));
92 return;
93 }
94 if(prior) {
95 Int_t i = (Int_t)type;
96 if (fPriorsDistributions[i]) {
97 delete fPriorsDistributions[i];
98 }
99 fPriorsDistributions[i]=new TH1F(*prior);
100 }
101}
102
103//-------------------------------------------------------------------------------------------------
104UInt_t AliPIDCombined::ComputeProbabilities(const AliVTrack *track, const AliPIDResponse *response, Double_t* bayesProbabilities,Double_t *priorsOwn) const {
105 //
106 // (1) Get raw probabilities of requested detectors and combine
107 // (2) priors passed as argument
108 // (3) Compute Bayes probabilities
109 //
110
111
112 // (1) Get raw probabilities of selected detectors and combine
113 UInt_t usedMask=0; // detectors actually used for track
114 fTOFmismProb = 0; // reset TOF mismatch weights
115
116 AliPIDResponse::EDetPidStatus status=AliPIDResponse::kDetNoSignal;
117 Double_t p[AliPID::kSPECIESC]; // combined probabilities of selected detectors
118 Double_t pMismTOF[AliPID::kSPECIESC]; // combined TOF mismatch probabilities using selected detectors
119 for (Int_t i=0;i<fSelectedSpecies;i++){ p[i]=1.;pMismTOF[i]=1.;} // no decision
120 for (Int_t ibit = 0; ibit < 7 ; ibit++) {
121 AliPIDResponse::EDetCode detBit = (AliPIDResponse::EDetCode)(1<<ibit);
122 if (fDetectorMask & detBit) { // getting probabilities for requested detectors only
123 Double_t detProb[AliPID::kSPECIESC];
124 status = response->ComputePIDProbability(detBit,track,fSelectedSpecies,detProb);
125 if (status == AliPIDResponse::kDetPidOk) {
126 if (fRejectMismatchMask & detBit) { // mismatch check (currently just for TOF)
127 if (detBit == AliPIDResponse::kDetTOF) {
128 fTOFmismProb = response->GetTOFMismatchProbability(); // mismatch weights computed with TOF probs (no arguments)
129 //Float_t probMis = response->GetTOFMismatchProbability(track); // mismatch compatibility TPC-TOF cut
130 SetCombinedStatus(status,&usedMask,detBit,detProb,fTOFmismProb);
131 } else {
132 SetCombinedStatus(status,&usedMask,detBit);
133 }
134 } else {
135 SetCombinedStatus(status,&usedMask,detBit);
136 }
137 for (Int_t i=0;i<fSelectedSpecies;i++){
138 p[i] *= detProb[i];
139 if(detBit == AliPIDResponse::kDetTOF){
140 Double_t pt = track->Pt();
141 Double_t mismPropagationFactor[] = {1.,1.,1.,1. + TMath::Exp(1. - 1.12*pt),
142 1. + 1./(4.71114 - 5.72372*pt + 2.94715*pt*pt),1.,1.,1.,1.,1.}; // correction for kaons and protons which has to be alligned with the one in AliPIDResponse
143 pMismTOF[i] *= fTOFmismProb*mismPropagationFactor[i];
144 }
145 else pMismTOF[i] *= detProb[i];
146 }
147 }
148 }
149 }
150 // if no detectors available there is no point to go further
151 if (usedMask == 0) return usedMask;
152
153 // (2) Get priors and propagate depending on detectors used
154 Double_t priors[AliPID::kSPECIESC];
155 memset(priors,0,fSelectedSpecies*sizeof(Double_t));
156
157 if(priorsOwn){
158 for(Int_t ipr=0;ipr < fSelectedSpecies;ipr++)
159 priors[ipr] = priorsOwn[ipr];
160 }
161
162 else if (fEnablePriors){
163 Bool_t isPPB = (response->GetBeamType() == AliPIDResponse::kPPB);
164 GetPriors(track,priors,response->GetCurrentCentrality(),isPPB);
165
166 // We apply the propagation factors of the more external detector
167 //
168 // TPC+HMPID --> apply HMPID propagation factors (TRD and TOF may be present)
169 // TPC+EMCAL --> apply EMCAL propagation factors (TRD and TOF may be present)
170 // TPC+TOF --> apply TOF propagation factors (TRD may be present, HMPID and EMCAL not (if requested))
171 // TPC+TRD --> apply TRD propagation factors (TOF, HMPID and EMCAL not present (if requested) )
172 //
173 if(fUseDefaultTPCPriors) {
174
175 Double_t pt=TMath::Abs(track->Pt());
176 if ( ( (usedMask & AliPIDResponse::kDetEMCAL)==AliPIDResponse::kDetEMCAL) || ( (usedMask & AliPIDResponse::kDetHMPID)==AliPIDResponse::kDetHMPID) ) {
177 // we assume EMCAL and HMPID cannot be simultaneously present
178 if ( (usedMask & AliPIDResponse::kDetEMCAL)==AliPIDResponse::kDetEMCAL ) {
179 // EMCal case (for the moment only in combination with TPC)
180 // propagation factors determined from LHC11d MC (LHC12a15f)
181 // v2 clusterizer, dEta < 0.015, dPhi < 0.03, NonLinearityFunction = 6
182
183 Float_t electronEMCALfactor=0.1;
184 Float_t kaonEMCALfactor = 0.1;
185 Float_t protonEMCALfactor = 0.1;
186
187 if(track->Charge() > 0){
188 // positiv charge (start parametrization at 0.75 GeV/c and stop at 20 GeV/c for the moment)
189 if(pt > 0.75 && pt < 20.0){
190 electronEMCALfactor = ( 0.214159 * ( 1 - TMath::Exp(-TMath::Power(pt,0.484512)/0.700499)*TMath::Power(pt,-0.669644)) ) / ( 0.210436 * ( 1 - TMath::Exp(-TMath::Power(pt,-0.219228)/0.947432)*TMath::Power(pt,-0.700792)) );
191 kaonEMCALfactor = ( 0.208686 * ( 1 - TMath::Exp(-TMath::Power(pt,-3.98149e-05)/1.28447)*TMath::Power(pt,-0.629191)) ) / ( 0.210436 * ( 1 - TMath::Exp(-TMath::Power(pt,-0.219228)/0.947432)*TMath::Power(pt,-0.700792)) );
192 protonEMCALfactor = ( 0.27555 * ( 1 - TMath::Exp(-TMath::Power(pt,-1.97226e-05)/1.52719)*TMath::Power(pt,-0.209068)) ) / ( 0.210436 * ( 1 - TMath::Exp(-TMath::Power(pt,-0.219228)/0.947432)*TMath::Power(pt,-0.700792)) );
193
194 }
195 }
196
197 if(track->Charge() < 0){
198 // negative charge (start parametrization at 0.75 GeV/c and stop at 20 GeV/c for the moment)
199 if(pt > 0.75 && pt < 20.0){
200 electronEMCALfactor = ( 0.216895 * ( 1 - TMath::Exp(-TMath::Power(pt,0.000105924)/0.865938)*TMath::Power(pt,-1.32787)) ) / ( 0.210385 * ( 1 - TMath::Exp(-TMath::Power(pt,4.41206e-07)/1.08984)*TMath::Power(pt,-0.544375)) );
201 kaonEMCALfactor = ( 0.204117 * ( 1 - TMath::Exp(-TMath::Power(pt,-1.6853e-05)/1.61765)*TMath::Power(pt,-0.738355)) ) / ( 0.210385 * ( 1 - TMath::Exp(-TMath::Power(pt,4.41206e-07)/1.08984)*TMath::Power(pt,-0.544375)) );
202 protonEMCALfactor = ( 0.215679 * ( 1 - TMath::Exp(-TMath::Power(pt,-4.10015e-05)/1.40921)*TMath::Power(pt,-0.533752)) ) / ( 0.210385 * ( 1 - TMath::Exp(-TMath::Power(pt,4.41206e-07)/1.08984)*TMath::Power(pt,-0.544375)) );
203 }
204 }
205 priors[0] *= electronEMCALfactor;
206 priors[3] *= kaonEMCALfactor;
207 priors[4] *= protonEMCALfactor;
208 } // end of EMCAL case
209
210 else if ( (usedMask & AliPIDResponse::kDetHMPID)==AliPIDResponse::kDetHMPID ) { // HMPID case
211
212 Float_t kaonHMPIDfactor = 0.;
213 Float_t protonHMPIDfactor = 0.;
214 if(pt>1. && pt<6.) kaonHMPIDfactor = (-0.0729337 + pt*0.0999531 - pt*pt*0.0371803 + pt*pt*pt*0.00706436 - pt*pt*pt*pt*0.000643619 + pt*pt*pt*pt*pt*2.21853e-05)/(-0.00896231+ pt*0.0330702 - pt*pt*0.0109562+ pt*pt*pt*0.00232895 - pt*pt*pt*pt*0.000246143 + pt*pt*pt*pt*pt*9.59812e-06);
215 if(pt>1.4 && pt<6.) protonHMPIDfactor = (-0.0444188 + pt*0.0681506 - pt*pt*0.0231819 + pt*pt*pt*0.00400771 - pt*pt*pt*pt*0.000339315 + pt*pt*pt*pt*pt*1.12616e-05)/(-0.00896231+ pt*0.0330702 - pt*pt*0.0109562+ pt*pt*pt*0.00232895 - pt*pt*pt*pt*0.000246143 + pt*pt*pt*pt*pt*9.59812e-06);
216 if(pt>6. && pt<8.) kaonHMPIDfactor = (-0.0729337 + pt*0.0999531 - pt*pt*0.0371803 + pt*pt*pt*0.00706436 - pt*pt*pt*pt*0.000643619 + pt*pt*pt*pt*pt*2.21853e-05)/0.0530456;
217 if(pt>8.) kaonHMPIDfactor = 0.0550432/0.0530456;
218 if(pt>6. && pt<8.5) protonHMPIDfactor = (-0.0444188 + pt*0.0681506 - pt*pt*0.0231819 + pt*pt*pt*0.00400771 - pt*pt*pt*pt*0.000339315 + pt*pt*pt*pt*pt*1.12616e-05)/0.0530456;
219 if(pt>8.5) protonHMPIDfactor = 0.0530071/0.0530456;
220
221 if(track->Charge() < 0){
222 if(pt>0.4 && pt<6.) protonHMPIDfactor = (-0.0351485 + pt*0.0473821 - pt*pt*0.0147947 + pt*pt*pt*0.00254811- pt*pt*pt*pt*0.000224724 + pt*pt*pt*pt*pt*7.9303e-06)/(-0.00896231+ pt*0.0330702 - pt*pt*0.0109562+ pt*pt*pt*0.00232895 - pt*pt*pt*pt*0.000246143 + pt*pt*pt*pt*pt*9.59812e-06);
223 if(pt>6. && pt<8.5) protonHMPIDfactor = (-0.0351485 + pt*0.0473821 - pt*pt*0.0147947 + pt*pt*pt*0.00254811- pt*pt*pt*pt*0.000224724 + pt*pt*pt*pt*pt*7.9303e-06)/0.0530456;
224 if(pt>8.5) protonHMPIDfactor = 0.0457756/0.0530456;
225 }
226
227 priors[3] *= kaonHMPIDfactor;
228 priors[4] *= protonHMPIDfactor;
229
230 }
231
232 } // end of outer cases: EMCAL/HMPID
233 else if ( (usedMask & AliPIDResponse::kDetTOF) == AliPIDResponse::kDetTOF ){
234 Float_t kaonTOFfactor = 0.1;
235 if(pt > 0.29){
236 kaonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,4.19618E-07)/4.96502e-01)*TMath::Power(pt,-1.50705);
237 }
238
239 Float_t protonTOFfactor = 0.1;
240 if(pt > 0.4) protonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,3.30978)/8.57396E-02)*TMath::Power(pt,-4.42661E-01);
241
242 if(track->Charge() < 0){ // for negative tracks
243 kaonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,4.87912E-07)/3.26431E-01)*TMath::Power(pt,-1.22893);
244 protonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,2.00575E-07)/4.95605E-01)*TMath::Power(pt,-6.71305E-01);
245 }
246 // TODO: we may need an electron factor for TOF as well, especially if TRD is present!
247 priors[3] *= kaonTOFfactor;
248 priors[4] *= protonTOFfactor;
249 } // end of TOF case
250 else if ( (usedMask & AliPIDResponse::kDetTRD)==AliPIDResponse::kDetTRD ) {
251 Float_t electronTRDfactor=0.1;
252 Float_t kaonTRDfactor = 0.1;
253 Float_t protonTRDfactor = 0.1;
254
255 if(track->Charge() > 0){
256 // positiv charge
257 if(pt > 0.25) electronTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,5.13315e-03)/2.11145e-01)*TMath::Power(pt,-2.97659e+00);
258 if(pt > 0.35) kaonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,-4.29549e-02)/4.87989e-01)*TMath::Power(pt,-1.54270e+00);
259 if(pt > 0.35) protonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,2.81238e+00)/7.57082e-02)*TMath::Power(pt,-8.12595e-01);
260 }
261
262 if(track->Charge() < 0){
263 // negative charge
264 if(pt > 0.25) electronTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,2.45537e-02)/1.90397e-01)*TMath::Power(pt,-3.33121e+00);
265 if(pt > 0.35) kaonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt, -3.42831e-03)/5.57013e-01)*TMath::Power(pt,-1.39202e+00);
266 if(pt > 0.35) protonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,3.36631e+00)/7.18819e-02)*TMath::Power(pt,-2.00577e-01);
267 }
268 // what about electrons
269 priors[0] *= electronTRDfactor;
270 priors[3] *= kaonTRDfactor;
271 priors[4] *= protonTRDfactor;
272 } // end of TRD case
273 } // end of fUseDefaultTPCPriors
274 } // end of use priors
275 else { for (Int_t i=0;i<fSelectedSpecies;i++) priors[i]=1.;}
276
277 // Compute Bayes probabilities
278 ComputeBayesProbabilities(bayesProbabilities,p,priors,pMismTOF);
279
280 // compute TOF probability contribution from mismatch
281 fTOFmismProb = 0;
282 for (Int_t i=0;i<fSelectedSpecies;i++) fTOFmismProb += pMismTOF[i];
283
284 return usedMask;
285}
286
287
288//-------------------------------------------------------------------------------------------------
289void AliPIDCombined::GetPriors(const AliVTrack *track, Double_t* p,Float_t centrality,Bool_t isPPB) const {
290
291 //
292 // get priors from distributions
293 //
294
295
296 Double_t pt=TMath::Abs(track->Pt());
297
298 if(fUseDefaultTPCPriors){ // use default priors if requested
299 Float_t usedCentr = centrality+5*(centrality>0);
300 if(usedCentr < -0.99) usedCentr = -0.99;
301 else if(usedCentr > 99) usedCentr = 99;
302 if(pt > 9.99) pt = 9.99;
303 else if(pt < 0.01) pt = 0.01;
304
305 if(! isPPB)
306 for(Int_t i=0;i<AliPID::kSPECIESC;i++) p[i] = fDefaultPriorsTPC[i]->Interpolate(usedCentr,pt);
307 else
308 for(Int_t i=0;i<AliPID::kSPECIESC;i++) p[i] = fDefaultPriorsTPCpPb[i]->Interpolate(usedCentr,pt);
309
310 return;
311 }
312
313 Double_t sumPriors = 0;
314 for (Int_t i=0;i<fSelectedSpecies;++i){
315 if (fPriorsDistributions[i]){
316 p[i]=fPriorsDistributions[i]->Interpolate(pt);
317 }
318 else {
319 p[i]=0.;
320 }
321 sumPriors+=p[i];
322 }
323
324 // normalizing priors
325 if (sumPriors == 0) return;
326 for (Int_t i=0;i<fSelectedSpecies;++i){
327 p[i]=p[i]/sumPriors;
328 }
329 return;
330}
331//-------------------------------------------------------------------------------------------------
332void AliPIDCombined::GetPriors(const AliVTrack *track,Double_t* p,const AliPIDResponse *response,UInt_t detUsed) const{
333
334 //
335 // get priors from distributions
336 //
337 Double_t pt=TMath::Abs(track->Pt());
338
339 if(fUseDefaultTPCPriors){ // use default priors if requested
340 Float_t usedCentr = response->GetCurrentCentrality()+5*(response->GetCurrentCentrality()>0);
341 if(usedCentr < -0.99) usedCentr = -0.99;
342 else if(usedCentr > 99) usedCentr = 99;
343 if(pt > 9.99) pt = 9.99;
344 else if(pt < 0.01) pt = 0.01;
345
346 for(Int_t i=0;i<AliPID::kSPECIESC;i++) p[i] = fDefaultPriorsTPC[i]->Interpolate(usedCentr,pt);
347
348 // Extra factor if TOF matching was required
349 if(detUsed & AliPIDResponse::kDetTOF){
350 Float_t kaonTOFfactor = 0.1;
351 if(pt > 0.29){
352 kaonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,4.19618E-07)/4.96502e-01)*TMath::Power(pt,-1.50705);
353 }
354 Float_t protonTOFfactor = 0.1;
355 if(pt > 0.4) protonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,3.30978)/8.57396E-02)*TMath::Power(pt,-4.42661E-01);
356
357 if(track->Charge() < 0){ // for negative tracks
358 kaonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,4.87912E-07)/3.26431E-01)*TMath::Power(pt,-1.22893);
359 protonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,2.00575E-07)/4.95605E-01)*TMath::Power(pt,-6.71305E-01);
360 }
361
362 p[3] *= kaonTOFfactor;
363 p[4] *= protonTOFfactor;
364 }
365
366 return;
367 }
368
369
370 Double_t sumPriors = 0;
371 for (Int_t i=0;i<fSelectedSpecies;++i){
372 if (fPriorsDistributions[i]){
373 p[i]=fPriorsDistributions[i]->Interpolate(pt);
374 }
375 else {
376 p[i]=0.;
377 }
378 sumPriors+=p[i];
379 }
380
381 // normalizing priors
382 if (sumPriors == 0) return;
383 for (Int_t i=0;i<fSelectedSpecies;++i){
384 p[i]=p[i]/sumPriors;
385 }
386 return;
387}
388//-------------------------------------------------------------------------------------------------
389void AliPIDCombined::ComputeBayesProbabilities(Double_t* probabilities, const Double_t* probDensity, const Double_t* prior, Double_t* probDensityMism) const {
390
391
392 //
393 // calculate Bayesian probabilities
394 //
395 Double_t sum = 0.;
396 for (Int_t i = 0; i < fSelectedSpecies; i++) {
397 sum += probDensity[i] * prior[i];
398 }
399 if (sum <= 0) {
400
401 AliError("Invalid probability densities or priors");
402 for (Int_t i = 0; i < fSelectedSpecies; i++) probabilities[i] = 1./fSelectedSpecies;
403 return;
404 }
405 for (Int_t i = 0; i < fSelectedSpecies; i++) {
406 probabilities[i] = probDensity[i] * prior[i] / sum;
407 if(probDensityMism) probDensityMism[i] *= prior[i] / sum;
408 }
409
410
411}
412
413
414//----------------------------------------------------------------------------------------
415void AliPIDCombined::SetCombinedStatus(AliPIDResponse::EDetPidStatus status, UInt_t *maskDetIn, AliPIDResponse::EDetCode bit) const {
416 switch (status) {
417 case AliPIDResponse::kDetNoParams:
418 case AliPIDResponse::kDetNoSignal:
419 case AliPIDResponse::kDetMismatch: // for backward compatibilty, we need then to remove kDetMismatch from AliPIDResponse
420 break;
421 case AliPIDResponse::kDetPidOk:
422 *maskDetIn = *maskDetIn | bit;
423 break;
424 }
425
426}
427
428//----------------------------------------------------------------------------------------
429void AliPIDCombined::SetCombinedStatus(AliPIDResponse::EDetPidStatus status, UInt_t *maskDetIn, AliPIDResponse::EDetCode bit, Double_t* /*p*/, const Float_t /*probMis*/) const {
430 switch (status) {
431 case AliPIDResponse::kDetNoParams:
432 case AliPIDResponse::kDetNoSignal:
433 case AliPIDResponse::kDetMismatch: // for backward compatibility, we need then to remove kDeteMismatch from AliPIDResponse
434 break;
435 case AliPIDResponse::kDetPidOk:
436 // if (probMis > 0.5) for (Int_t j=0;j<fSelectedSpecies;j++) p[j]=1./fSelectedSpecies; // no longer used because mismatch is in the framework now
437 //else
438 *maskDetIn = *maskDetIn | bit;
439 break;
440 }
441
442}
443
444
445
446//----------------------------------------------------------------------------------------
447void AliPIDCombined::SetDefaultTPCPriors(){
448 fEnablePriors=kTRUE;
449 fUseDefaultTPCPriors = kTRUE;
450
451 //Check if priors are already initialized
452 if (fDefaultPriorsTPC[0]) return;
453
454 TString oadbfilename("$ALICE_PHYSICS/OADB/COMMON/PID/data/");
455 // TString oadbfilename("$ALICE_ROOT/OADB/COMMON/PID/data/");
456 // TString oadbfilename(Form("%s/COMMON/PID/data/",AliAnalysisManager::GetOADBPath()));
457 oadbfilename += "/PIDdefaultPriors.root";
458 TFile * foadb = TFile::Open(oadbfilename.Data());
459 if(!foadb || !foadb->IsOpen()) {
460 delete foadb;
461 AliFatal(Form("Cannot open OADB file %s", oadbfilename.Data()));
462 return;
463 }
464
465 AliOADBContainer * priorsContainer = (AliOADBContainer*) foadb->Get("priorsTPC");
466 if (!priorsContainer) AliFatal("Cannot fetch OADB container for Priors");
467
468 const char *namespecies[AliPID::kSPECIESC] = {"El","Mu","Pi","Ka","Pr","De","Tr","He3","He3"};
469 char name[100];
470
471 for(Int_t i=0;i < AliPID::kSPECIESC;i++){
472 snprintf(name,99,"hDefault%sPriors",namespecies[i]);
473 fDefaultPriorsTPC[i] = (TH2F*) priorsContainer->GetDefaultObject(name);
474 if (!fDefaultPriorsTPC[i]) AliFatal(Form("Cannot find priors for %s", namespecies[i]));
475 snprintf(name,99,"hDefault%sPriorsPPb",namespecies[i]);
476 fDefaultPriorsTPCpPb[i] = (TH2F*) priorsContainer->GetDefaultObject(name);
477 if (!fDefaultPriorsTPCpPb[i]) {
478 fDefaultPriorsTPCpPb[i] = fDefaultPriorsTPC[i]; // use PbPb ones
479 }
480 }
481
482 delete foadb;
483}