1 /**************************************************************************
2 * Copyright(c) 1998-1999, 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 **************************************************************************/
18 /* History of cvs commits:
21 * Revision 1.113 2007/08/07 14:12:03 kharlov
22 * Quality assurance added (Yves Schutz)
24 * Revision 1.112 2007/07/11 13:43:30 hristov
25 * New class AliESDEvent, backward compatibility with the old AliESD (Christian)
27 * Revision 1.111 2007/05/04 14:49:29 policheh
28 * AliPHOSRecPoint inheritance from AliCluster
30 * Revision 1.110 2007/04/24 10:08:03 kharlov
31 * Vertex extraction from GenHeader
33 * Revision 1.109 2007/04/18 09:34:05 kharlov
36 * Revision 1.108 2007/04/16 09:03:37 kharlov
37 * Incedent angle correction fixed
39 * Revision 1.107 2007/04/02 15:00:16 cvetan
40 * No more calls to gAlice in the reconstruction
42 * Revision 1.106 2007/04/01 15:40:15 kharlov
43 * Correction for actual vertex position implemented
45 * Revision 1.105 2007/03/06 06:57:46 kharlov
46 * DP:calculation of distance to CPV done in TSM
48 * Revision 1.104 2006/12/15 10:46:26 hristov
49 * Using TMath::Abs instead of fabs
51 * Revision 1.103 2006/09/07 18:31:08 kharlov
52 * Effective c++ corrections (T.Pocheptsov)
54 * Revision 1.102 2006/01/23 17:51:48 hristov
55 * Using the recommended way of forward declarations for TVector and TMatrix (see v5-08-00 release notes). Additional clean-up
57 * Revision 1.101 2005/05/28 14:19:04 schutz
58 * Compilation warnings fixed by T.P.
62 //_________________________________________________________________________
63 // Implementation version v1 of the PHOS particle identifier
64 // Particle identification based on the
65 // - RCPV: distance from CPV recpoint to EMCA recpoint.
67 // - PCA: Principal Components Analysis..
68 // The identified particle has an identification number corresponding
69 // to a 9 bits number:
70 // -Bit 0 to 2: bit set if RCPV > CpvEmcDistance (each bit corresponds
71 // to a different efficiency-purity point of the photon identification)
72 // -Bit 3 to 5: bit set if TOF < TimeGate (each bit corresponds
73 // to a different efficiency-purity point of the photon identification)
74 // -Bit 6 to 9: bit set if Principal Components are
75 // inside an ellipse defined by the parameters a, b, c, x0 and y0.
76 // (each bit corresponds to a different efficiency-purity point of the
77 // photon identification)
78 // The PCA (Principal components analysis) needs a file that contains
79 // a previous analysis of the correlations between the particles. This
80 // file is $ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root. Analysis done for
81 // energies between 0.5 and 100 GeV.
82 // A calibrated energy is calculated. The energy of the reconstructed
83 // cluster is corrected with the formula A + B * E + C * E^2, whose
84 // parameters where obtained through the study of the reconstructed
85 // energy distribution of monoenergetic photons.
87 // All the parameters (RCPV(2 rows-3 columns),TOF(1r-3c),PCA(5r-4c)
88 // and calibration(1r-3c))are stored in a file called
89 // $ALICE_ROOT/PHOS/Parameters.dat. Each time that AliPHOSPIDv1 is
90 // initialized, this parameters are copied to a Matrix (9,4), a
94 // root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root")
95 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
96 // // reading headers from file galice1.root and create RecParticles
97 // TrackSegments and RecPoints are used
98 // // set file name for the branch RecParticles
99 // root [1] p->ExecuteTask("deb all time")
100 // // available options
101 // // "deb" - prints # of reconstructed particles
102 // // "deb all" - prints # and list of RecParticles
103 // // "time" - prints benchmarking results
105 // root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1",kTRUE)
106 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
108 // root [3] p2->ExecuteTask()
112 //*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
113 // Gustavo Conesa April 2002
114 // PCA redesigned by Gustavo Conesa October 2002:
115 // The way of using the PCA has changed. Instead of 2
116 // files with the PCA, each one with different energy ranges
117 // of application, we use the wide one (0.5-100 GeV), and instead
118 // of fixing 3 ellipses for different ranges of energy, it has been
119 // studied the dependency of the ellipses parameters with the
120 // energy, and they are implemented in the code as a funtion
125 // --- ROOT system ---
128 // --- Standard library ---
129 #include <TMatrixF.h>
130 #include "TFormula.h"
131 #include "TBenchmark.h"
132 #include "TPrincipal.h"
136 // --- AliRoot header files ---
137 //#include "AliLog.h"
139 #include "AliPHOSPIDv1.h"
140 #include "AliESDEvent.h"
141 #include "AliESDVertex.h"
142 #include "AliPHOSTrackSegment.h"
143 #include "AliPHOSEmcRecPoint.h"
144 #include "AliPHOSRecParticle.h"
146 ClassImp( AliPHOSPIDv1)
148 //____________________________________________________________________________
149 AliPHOSPIDv1::AliPHOSPIDv1() :
152 fDefaultInit(kFALSE),
154 fFileNamePrincipalPhoton(),
155 fFileNamePrincipalPi0(),
156 fFileNameParameters(),
172 fChargedNeutralThreshold(0.),
175 fDispMultThreshold(0)
180 fDefaultInit = kTRUE ;
183 //____________________________________________________________________________
184 AliPHOSPIDv1::AliPHOSPIDv1(const AliPHOSPIDv1 & pid ) :
187 fDefaultInit(kFALSE),
189 fFileNamePrincipalPhoton(),
190 fFileNamePrincipalPi0(),
191 fFileNameParameters(),
207 fChargedNeutralThreshold(0.),
210 fDispMultThreshold(0)
218 //____________________________________________________________________________
219 AliPHOSPIDv1::AliPHOSPIDv1(AliPHOSGeometry *geom):
222 fDefaultInit(kFALSE),
224 fFileNamePrincipalPhoton(),
225 fFileNamePrincipalPi0(),
226 fFileNameParameters(),
242 fChargedNeutralThreshold(0.),
245 fDispMultThreshold(0)
248 //ctor with the indication on where to look for the track segments
251 fDefaultInit = kFALSE ;
254 //____________________________________________________________________________
255 AliPHOSPIDv1::~AliPHOSPIDv1()
258 fPrincipalPhoton = 0;
261 delete [] fX ; // Principal input
262 delete [] fPPhoton ; // Photon Principal components
263 delete [] fPPi0 ; // Pi0 Principal components
275 //____________________________________________________________________________
276 void AliPHOSPIDv1::InitParameters()
278 // Initialize PID parameters
281 SetParameters() ; // fill the parameters matrix from parameters file
283 // initialisation of response function parameters
287 // fTphoton[0] = 0.218 ;
288 // fTphoton[1] = 1.55E-8 ;
289 // fTphoton[2] = 5.05E-10 ;
290 // fTFphoton = new TFormula("ToF response to photons" , "gaus") ;
291 // fTFphoton->SetParameters( fTphoton[0], fTphoton[1], fTphoton[2]) ;
294 // //Gaus (0 to max probability)
295 // fTpiong[0] = 0.0971 ;
296 // fTpiong[1] = 1.58E-8 ;
297 // fTpiong[2] = 5.69E-10 ;
298 // fTFpiong = new TFormula("ToF response to pions" , "gaus") ;
299 // fTFpiong->SetParameters( fTpiong[0], fTpiong[1], fTpiong[2]) ;
302 // //Gaus (0 to max probability)
303 // fTkaong[0] = 0.0542 ;
304 // fTkaong[1] = 1.64E-8 ;
305 // fTkaong[2] = 6.07E-10 ;
306 // fTFkaong = new TFormula("ToF response to kaon" , "gaus") ;
307 // fTFkaong->SetParameters( fTkaong[0], fTkaong[1], fTkaong[2]) ;
308 // //Landau (max probability to inf)
309 // fTkaonl[0] = 0.264 ;
310 // fTkaonl[1] = 1.68E-8 ;
311 // fTkaonl[2] = 4.10E-10 ;
312 // fTFkaonl = new TFormula("ToF response to kaon" , "landau") ;
313 // fTFkaonl->SetParameters( fTkaonl[0], fTkaonl[1], fTkaonl[2]) ;
316 // //Gaus (0 to max probability)
317 // fThhadrong[0] = 0.0302 ;
318 // fThhadrong[1] = 1.73E-8 ;
319 // fThhadrong[2] = 9.52E-10 ;
320 // fTFhhadrong = new TFormula("ToF response to heavy hadrons" , "gaus") ;
321 // fTFhhadrong->SetParameters( fThhadrong[0], fThhadrong[1], fThhadrong[2]) ;
322 // //Landau (max probability to inf)
323 // fThhadronl[0] = 0.139 ;
324 // fThhadronl[1] = 1.745E-8 ;
325 // fThhadronl[2] = 1.00E-9 ;
326 // fTFhhadronl = new TFormula("ToF response to heavy hadrons" , "landau") ;
327 // fTFhhadronl->SetParameters( fThhadronl[0], fThhadronl[1], fThhadronl[2]) ;
330 fTphoton[0] = 7.83E8 ;
331 fTphoton[1] = 1.55E-8 ;
332 fTphoton[2] = 5.09E-10 ;
333 fTFphoton = new TFormula("ToF response to photons" , "gaus") ;
334 fTFphoton->SetParameters( fTphoton[0], fTphoton[1], fTphoton[2]) ;
337 //Gaus (0 to max probability)
338 fTpiong[0] = 6.73E8 ;
339 fTpiong[1] = 1.58E-8 ;
340 fTpiong[2] = 5.87E-10 ;
341 fTFpiong = new TFormula("ToF response to pions" , "gaus") ;
342 fTFpiong->SetParameters( fTpiong[0], fTpiong[1], fTpiong[2]) ;
345 //Gaus (0 to max probability)
346 fTkaong[0] = 3.93E8 ;
347 fTkaong[1] = 1.64E-8 ;
348 fTkaong[2] = 6.07E-10 ;
349 fTFkaong = new TFormula("ToF response to kaon" , "gaus") ;
350 fTFkaong->SetParameters( fTkaong[0], fTkaong[1], fTkaong[2]) ;
351 //Landau (max probability to inf)
353 fTkaonl[1] = 1.68E-8 ;
354 fTkaonl[2] = 4.10E-10 ;
355 fTFkaonl = new TFormula("ToF response to kaon" , "landau") ;
356 fTFkaonl->SetParameters( fTkaonl[0], fTkaonl[1], fTkaonl[2]) ;
359 //Gaus (0 to max probability)
360 fThhadrong[0] = 2.02E8 ;
361 fThhadrong[1] = 1.73E-8 ;
362 fThhadrong[2] = 9.52E-10 ;
363 fTFhhadrong = new TFormula("ToF response to heavy hadrons" , "gaus") ;
364 fTFhhadrong->SetParameters( fThhadrong[0], fThhadrong[1], fThhadrong[2]) ;
365 //Landau (max probability to inf)
366 fThhadronl[0] = 1.10E9 ;
367 fThhadronl[1] = 1.74E-8 ;
368 fThhadronl[2] = 1.00E-9 ;
369 fTFhhadronl = new TFormula("ToF response to heavy hadrons" , "landau") ;
370 fTFhhadronl->SetParameters( fThhadronl[0], fThhadronl[1], fThhadronl[2]) ;
374 // Shower shape: dispersion gaussian parameters
377 // fDphoton[0] = 4.62e-2; fDphoton[1] = 1.39e-2 ; fDphoton[2] = -3.80e-2;//constant
378 // fDphoton[3] = 1.53 ; fDphoton[4] =-6.62e-2 ; fDphoton[5] = 0.339 ;//mean
379 // fDphoton[6] = 6.89e-2; fDphoton[7] =-6.59e-2 ; fDphoton[8] = 0.194 ;//sigma
381 // fDpi0[0] = 0.0586 ; fDpi0[1] = 1.06E-3 ; fDpi0[2] = 0. ;//constant
382 // fDpi0[3] = 2.67 ; fDpi0[4] =-2.00E-2 ; fDpi0[5] = 9.37E-5 ;//mean
383 // fDpi0[6] = 0.153 ; fDpi0[7] = 9.34E-4 ; fDpi0[8] =-1.49E-5 ;//sigma
385 // fDhadron[0] = 1.61E-2 ; fDhadron[1] = 3.03E-3 ; fDhadron[2] = 1.01E-2 ;//constant
386 // fDhadron[3] = 3.81 ; fDhadron[4] = 0.232 ; fDhadron[5] =-1.25 ;//mean
387 // fDhadron[6] = 0.897 ; fDhadron[7] = 0.0987 ; fDhadron[8] =-0.534 ;//sigma
389 fDphoton[0] = 1.5 ; fDphoton[1] = 0.49 ; fDphoton[2] =-1.7E-2 ;//constant
390 fDphoton[3] = 1.5 ; fDphoton[4] = 4.0E-2 ; fDphoton[5] = 0.21 ;//mean
391 fDphoton[6] = 4.8E-2 ; fDphoton[7] =-0.12 ; fDphoton[8] = 0.27 ;//sigma
392 fDphoton[9] = 16.; //for E> fDphoton[9] parameters calculated at fDphoton[9]
394 fDpi0[0] = 0.25 ; fDpi0[1] = 3.3E-2 ; fDpi0[2] =-1.0e-5 ;//constant
395 fDpi0[3] = 1.50 ; fDpi0[4] = 398. ; fDpi0[5] = 12. ;//mean
396 fDpi0[6] =-7.0E-2 ; fDpi0[7] =-524. ; fDpi0[8] = 22. ;//sigma
397 fDpi0[9] = 110.; //for E> fDpi0[9] parameters calculated at fDpi0[9]
399 fDhadron[0] = 6.5 ; fDhadron[1] =-5.3 ; fDhadron[2] = 1.5 ;//constant
400 fDhadron[3] = 3.8 ; fDhadron[4] = 0.23 ; fDhadron[5] =-1.2 ;//mean
401 fDhadron[6] = 0.88 ; fDhadron[7] = 9.3E-2 ; fDhadron[8] =-0.51 ;//sigma
402 fDhadron[9] = 2.; //for E> fDhadron[9] parameters calculated at fDhadron[9]
407 fDFmuon = new TFormula("Shower shape response to muons" , "landau") ;
408 fDFmuon->SetParameters( fDmuon[0], fDmuon[1], fDmuon[2]) ;
411 // x(CPV-EMC) distance gaussian parameters
413 // fXelectron[0] = 8.06e-2 ; fXelectron[1] = 1.00e-2; fXelectron[2] =-5.14e-2;//constant
414 // fXelectron[3] = 0.202 ; fXelectron[4] = 8.15e-3; fXelectron[5] = 4.55 ;//mean
415 // fXelectron[6] = 0.334 ; fXelectron[7] = 0.186 ; fXelectron[8] = 4.32e-2;//sigma
417 // //charged hadrons gaus
418 // fXcharged[0] = 6.43e-3 ; fXcharged[1] =-4.19e-5; fXcharged[2] = 1.42e-3;//constant
419 // fXcharged[3] = 2.75 ; fXcharged[4] =-0.40 ; fXcharged[5] = 1.68 ;//mean
420 // fXcharged[6] = 3.135 ; fXcharged[7] =-9.41e-2; fXcharged[8] = 1.31e-2;//sigma
422 // // z(CPV-EMC) distance gaussian parameters
424 // fZelectron[0] = 8.22e-2 ; fZelectron[1] = 5.11e-3; fZelectron[2] =-3.05e-2;//constant
425 // fZelectron[3] = 3.09e-2 ; fZelectron[4] = 5.87e-2; fZelectron[5] =-9.49e-2;//mean
426 // fZelectron[6] = 0.263 ; fZelectron[7] =-9.02e-3; fZelectron[8] = 0.151 ;//sigma
428 // //charged hadrons gaus
430 // fZcharged[0] = 1.00e-2 ; fZcharged[1] = 2.82E-4 ; fZcharged[2] = 2.87E-3 ;//constant
431 // fZcharged[3] =-4.68e-2 ; fZcharged[4] =-9.21e-3 ; fZcharged[5] = 4.91e-2 ;//mean
432 // fZcharged[6] = 1.425 ; fZcharged[7] =-5.90e-2 ; fZcharged[8] = 5.07e-2 ;//sigma
435 fXelectron[0] =-1.6E-2 ; fXelectron[1] = 0.77 ; fXelectron[2] =-0.15 ;//constant
436 fXelectron[3] = 0.35 ; fXelectron[4] = 0.25 ; fXelectron[5] = 4.12 ;//mean
437 fXelectron[6] = 0.30 ; fXelectron[7] = 0.11 ; fXelectron[8] = 0.16 ;//sigma
438 fXelectron[9] = 3.; //for E> fXelectron[9] parameters calculated at fXelectron[9]
440 //charged hadrons gaus
441 fXcharged[0] = 0.14 ; fXcharged[1] =-3.0E-2 ; fXcharged[2] = 0 ;//constant
442 fXcharged[3] = 1.4 ; fXcharged[4] =-9.3E-2 ; fXcharged[5] = 1.4 ;//mean
443 fXcharged[6] = 5.7 ; fXcharged[7] = 0.27 ; fXcharged[8] =-1.8 ;//sigma
444 fXcharged[9] = 1.2; //for E> fXcharged[9] parameters calculated at fXcharged[9]
446 // z(CPV-EMC) distance gaussian parameters
448 fZelectron[0] = 0.49 ; fZelectron[1] = 0.53 ; fZelectron[2] =-9.8E-2 ;//constant
449 fZelectron[3] = 2.8E-2 ; fZelectron[4] = 5.0E-2 ; fZelectron[5] =-8.2E-2 ;//mean
450 fZelectron[6] = 0.25 ; fZelectron[7] =-1.7E-2 ; fZelectron[8] = 0.17 ;//sigma
451 fZelectron[9] = 3.; //for E> fZelectron[9] parameters calculated at fZelectron[9]
453 //charged hadrons gaus
455 fZcharged[0] = 0.46 ; fZcharged[1] =-0.65 ; fZcharged[2] = 0.52 ;//constant
456 fZcharged[3] = 1.1E-2 ; fZcharged[4] = 0. ; fZcharged[5] = 0. ;//mean
457 fZcharged[6] = 0.60 ; fZcharged[7] =-8.2E-2 ; fZcharged[8] = 0.45 ;//sigma
458 fZcharged[9] = 1.2; //for E> fXcharged[9] parameters calculated at fXcharged[9]
460 //Threshold to differentiate between charged and neutral
461 fChargedNeutralThreshold = 1e-5;
462 fTOFEnThreshold = 2; //Maximum energy to use TOF
463 fDispEnThreshold = 0.5; //Minimum energy to use shower shape
464 fDispMultThreshold = 3; //Minimum multiplicity to use shower shape
466 //Weight to hadrons recontructed energy
468 fERecWeightPar[0] = 0.32 ;
469 fERecWeightPar[1] = 3.8 ;
470 fERecWeightPar[2] = 5.4E-3 ;
471 fERecWeightPar[3] = 5.6E-2 ;
472 fERecWeight = new TFormula("Weight for hadrons" , "[0]*exp(-x*[1])+[2]*exp(-x*[3])") ;
473 fERecWeight ->SetParameters(fERecWeightPar[0],fERecWeightPar[1] ,fERecWeightPar[2] ,fERecWeightPar[3]) ;
476 for (Int_t i =0; i< AliPID::kSPECIESCN ; i++)
481 //________________________________________________________________________
482 void AliPHOSPIDv1::TrackSegments2RecParticles(Option_t *option)
484 // Steering method to perform particle reconstruction and identification
485 // for the event range from fFirstEvent to fLastEvent.
487 if(strstr(option,"tim"))
488 gBenchmark->Start("PHOSPID");
490 if(strstr(option,"print")) {
495 if(fTrackSegments && //Skip events, where no track segments made
496 fTrackSegments->GetEntriesFast()) {
504 if(strstr(option,"deb"))
505 PrintRecParticles(option) ;
508 if(strstr(option,"deb"))
509 PrintRecParticles(option);
510 if(strstr(option,"tim")){
511 gBenchmark->Stop("PHOSPID");
512 AliInfo(Form("took %f seconds for PID",
513 gBenchmark->GetCpuTime("PHOSPID")));
517 //________________________________________________________________________
518 Double_t AliPHOSPIDv1::GausF(Double_t x, Double_t y, Double_t * par)
520 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
521 //this method returns a density probability of this parameter, given by a gaussian
522 //function whose parameters depend with the energy with a function: a/(x*x)+b/x+b
524 if (x > par[9]) x = par[9];
526 //Double_t cnt = par[1] / (x*x) + par[2] / x + par[0] ;
527 Double_t cnt = par[0] + par[1] * x + par[2] * x * x ;
528 Double_t mean = par[4] / (x*x) + par[5] / x + par[3] ;
529 Double_t sigma = par[7] / (x*x) + par[8] / x + par[6] ;
532 // cout<<"En_in = "<<xorg<<"; En_out = "<<x<<"; cnt = "<<cnt
533 // <<"; mean = "<<mean<<"; sigma = "<<sigma<<endl;
535 // Double_t arg = - (y-mean) * (y-mean) / (2*sigma*sigma) ;
536 // return cnt * TMath::Exp(arg) ;
537 if(TMath::Abs(sigma) > 1.e-10){
538 return cnt*TMath::Gaus(y,mean,sigma);
544 //________________________________________________________________________
545 Double_t AliPHOSPIDv1::GausPol2(Double_t x, Double_t y, Double_t * par)
547 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
548 //this method returns a density probability of this parameter, given by a gaussian
549 //function whose parameters depend with the energy like second order polinomial
551 Double_t cnt = par[0] + par[1] * x + par[2] * x * x ;
552 Double_t mean = par[3] + par[4] * x + par[5] * x * x ;
553 Double_t sigma = par[6] + par[7] * x + par[8] * x * x ;
555 if(TMath::Abs(sigma) > 1.e-10){
556 return cnt*TMath::Gaus(y,mean,sigma);
565 //____________________________________________________________________________
566 const TString AliPHOSPIDv1::GetFileNamePrincipal(TString particle) const
568 //Get file name that contains the PCA for a particle ("photon or pi0")
571 if (particle=="photon")
572 name = fFileNamePrincipalPhoton ;
573 else if (particle=="pi0" )
574 name = fFileNamePrincipalPi0 ;
576 AliError(Form("Wrong particle name: %s (choose from pi0/photon)\n",
581 //____________________________________________________________________________
582 Float_t AliPHOSPIDv1::GetParameterCalibration(Int_t i) const
584 // Get the i-th parameter "Calibration"
587 AliError(Form("Invalid parameter number: %d",i));
589 param = (*fParameters)(0,i);
593 //____________________________________________________________________________
594 Float_t AliPHOSPIDv1::GetParameterCpv2Emc(Int_t i, TString axis) const
596 // Get the i-th parameter "CPV-EMC distance" for the specified axis
599 AliError(Form("Invalid parameter number: %d",i));
603 param = (*fParameters)(1,i);
604 else if (axis == "z")
605 param = (*fParameters)(2,i);
607 AliError(Form("Invalid axis name: %s",axis.Data()));
613 //____________________________________________________________________________
614 Float_t AliPHOSPIDv1::GetCpv2EmcDistanceCut(TString axis, Float_t e) const
616 // Get CpvtoEmcDistance Cut depending on the cluster energy, axis and
617 // Purity-Efficiency point
620 Float_t p[]={0.,0.,0.};
621 for (Int_t i=0; i<3; i++) p[i] = GetParameterCpv2Emc(i,axis);
622 Float_t sig = p[0] + TMath::Exp(p[1] - p[2]*e);
626 //____________________________________________________________________________
627 Float_t AliPHOSPIDv1::GetEllipseParameter(TString particle, TString param, Float_t e) const
629 // Calculates the parameter param of the ellipse
633 Float_t p[4]={0.,0.,0.,0.};
635 for (Int_t i=0; i<4; i++) p[i] = GetParameterToCalculateEllipse(particle,param,i);
636 if (particle == "photon") {
637 if (param.Contains("a")) e = TMath::Min((Double_t)e,70.);
638 else if (param.Contains("b")) e = TMath::Min((Double_t)e,70.);
639 else if (param.Contains("x0")) e = TMath::Max((Double_t)e,1.1);
642 if (particle == "photon")
643 value = p[0]/TMath::Sqrt(e) + p[1]*e + p[2]*e*e + p[3];
644 else if (particle == "pi0")
645 value = p[0] + p[1]*e + p[2]*e*e;
650 //_____________________________________________________________________________
651 Float_t AliPHOSPIDv1::GetParameterPhotonBoundary (Int_t i) const
653 // Get the parameter "i" to calculate the boundary on the moment M2x
654 // for photons at high p_T
657 AliError(Form("Wrong parameter number: %d\n",i));
659 param = (*fParameters)(14,i) ;
663 //____________________________________________________________________________
664 Float_t AliPHOSPIDv1::GetParameterPi0Boundary (Int_t i) const
666 // Get the parameter "i" to calculate the boundary on the moment M2x
667 // for pi0 at high p_T
670 AliError(Form("Wrong parameter number: %d\n",i));
672 param = (*fParameters)(15,i) ;
676 //____________________________________________________________________________
677 Float_t AliPHOSPIDv1::GetParameterTimeGate(Int_t i) const
679 // Get TimeGate parameter depending on Purity-Efficiency i:
680 // i=0 - Low purity, i=1 - Medium purity, i=2 - High purity
683 AliError(Form("Invalid Efficiency-Purity choice %d",i));
685 param = (*fParameters)(3,i) ;
689 //_____________________________________________________________________________
690 Float_t AliPHOSPIDv1::GetParameterToCalculateEllipse(TString particle, TString param, Int_t i) const
692 // Get the parameter "i" that is needed to calculate the ellipse
693 // parameter "param" for the particle "particle" ("photon" or "pi0")
698 if (particle == "photon")
700 else if (particle == "pi0")
703 AliError(Form("Wrong particle name: %s (choose from pi0/photon)\n",
709 if (param.Contains("a")) p=4+offset;
710 else if(param.Contains("b")) p=5+offset;
711 else if(param.Contains("c")) p=6+offset;
712 else if(param.Contains("x0"))p=7+offset;
713 else if(param.Contains("y0"))p=8+offset;
716 AliError(Form("No parameter with index %d", i)) ;
718 AliError(Form("No parameter with name %s", param.Data() )) ;
720 par = (*fParameters)(p,i) ;
724 //____________________________________________________________________________
725 Int_t AliPHOSPIDv1::GetCPVBit(AliPHOSTrackSegment * ts, Int_t effPur, Float_t e) const
727 //Calculates the pid bit for the CPV selection per each purity.
728 if(effPur>2 || effPur<0)
729 AliError(Form("Invalid Efficiency-Purity choice %d",effPur));
731 //DP if(ts->GetCpvIndex()<0)
732 //DP return 1 ; //no CPV cluster
734 Float_t sigX = GetCpv2EmcDistanceCut("X",e);
735 Float_t sigZ = GetCpv2EmcDistanceCut("Z",e);
737 Float_t deltaX = TMath::Abs(ts->GetCpvDistance("X"));
738 Float_t deltaZ = TMath::Abs(ts->GetCpvDistance("Z"));
739 // Info("GetCPVBit"," xdist %f, sigx %f, zdist %f, sigz %f",deltaX, sigX, deltaZ,sigZ) ;
741 //if(deltaX>sigX*(effPur+1))
742 //if((deltaX>sigX*(effPur+1)) || (deltaZ>sigZ*(effPur+1)))
743 if((deltaX>sigX*(effPur+1)) && (deltaZ>sigZ*(effPur+1)))
749 //____________________________________________________________________________
750 Int_t AliPHOSPIDv1::GetPrincipalBit(TString particle, const Double_t* p, Int_t effPur, Float_t e)const
752 //Is the particle inside de PCA ellipse?
756 Float_t a = GetEllipseParameter(particle,"a" , e);
757 Float_t b = GetEllipseParameter(particle,"b" , e);
758 Float_t c = GetEllipseParameter(particle,"c" , e);
759 Float_t x0 = GetEllipseParameter(particle,"x0", e);
760 Float_t y0 = GetEllipseParameter(particle,"y0", e);
762 Float_t r = TMath::Power((p[0] - x0)/a,2) +
763 TMath::Power((p[1] - y0)/b,2) +
764 c*(p[0] - x0)*(p[1] - y0)/(a*b) ;
765 //3 different ellipses defined
766 if((effPur==2) && (r<1./2.)) prinbit= 1;
767 if((effPur==1) && (r<2. )) prinbit= 1;
768 if((effPur==0) && (r<9./2.)) prinbit= 1;
771 AliError("Negative square?") ;
776 //____________________________________________________________________________
777 Int_t AliPHOSPIDv1::GetHardPhotonBit(AliPHOSEmcRecPoint * emc) const
779 // Set bit for identified hard photons (E > 30 GeV)
780 // if the second moment M2x is below the boundary
782 Float_t e = emc->GetEnergy();
783 if (e < 30.0) return 0;
784 Float_t m2x = emc->GetM2x();
785 Float_t m2xBoundary = GetParameterPhotonBoundary(0) *
786 TMath::Exp(-TMath::Power(e-GetParameterPhotonBoundary(1),2)/2.0/
787 TMath::Power(GetParameterPhotonBoundary(2),2)) +
788 GetParameterPhotonBoundary(3);
789 AliDebug(1, Form("E=%f, m2x=%f, boundary=%f", e,m2x,m2xBoundary));
790 if (m2x < m2xBoundary)
791 return 1;// A hard photon
793 return 0;// Not a hard photon
796 //____________________________________________________________________________
797 Int_t AliPHOSPIDv1::GetHardPi0Bit(AliPHOSEmcRecPoint * emc) const
799 // Set bit for identified hard pi0 (E > 30 GeV)
800 // if the second moment M2x is above the boundary
802 Float_t e = emc->GetEnergy();
803 if (e < 30.0) return 0;
804 Float_t m2x = emc->GetM2x();
805 Float_t m2xBoundary = GetParameterPi0Boundary(0) +
806 e * GetParameterPi0Boundary(1);
807 AliDebug(1,Form("E=%f, m2x=%f, boundary=%f",e,m2x,m2xBoundary));
808 if (m2x > m2xBoundary)
809 return 1;// A hard pi0
811 return 0;// Not a hard pi0
814 //____________________________________________________________________________
815 TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSCpvRecPoint * )const
817 // Calculates the momentum direction:
818 // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
819 // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
820 // However because of the poor position resolution of PPSD the direction is always taken as if we were
824 emc->GetLocalPosition(local) ;
826 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
827 //Correct for the non-perpendicular incidence
828 // Correction for the depth of the shower starting point (TDR p 127)
829 Float_t para = 0.925 ;
830 Float_t parb = 6.52 ;
832 //Remove Old correction (vertex at 0,0,0)
833 TVector3 vtxOld(0.,0.,0.) ;
835 Float_t x=local.X() ;
836 Float_t z=local.Z() ;
837 phosgeom->GetIncidentVector(vtxOld,emc->GetPHOSMod(),x,z,vInc) ;
838 Float_t depthxOld = 0.;
839 Float_t depthzOld = 0.;
840 Float_t energy = emc->GetEnergy() ;
841 if (energy > 0 && vInc.Y()!=0.) {
842 depthxOld = ( para * TMath::Log(energy) + parb ) * vInc.X()/TMath::Abs(vInc.Y()) ;
843 depthzOld = ( para * TMath::Log(energy) + parb ) * vInc.Z()/TMath::Abs(vInc.Y()) ;
846 AliError("Cluster with zero energy \n");
849 phosgeom->GetIncidentVector(fVtx,emc->GetPHOSMod(),x,z,vInc) ;
852 if (energy > 0 && vInc.Y()!=0.) {
853 depthx = ( para * TMath::Log(energy) + parb ) * vInc.X()/TMath::Abs(vInc.Y()) ;
854 depthz = ( para * TMath::Log(energy) + parb ) * vInc.Z()/TMath::Abs(vInc.Y()) ;
857 //Correct for the vertex position and shower depth
858 Double_t xd=x+(depthxOld-depthx) ;
859 Double_t zd=z+(depthzOld-depthz) ;
860 TVector3 dir(0,0,0) ;
861 phosgeom->Local2Global(emc->GetPHOSMod(),xd,zd,dir) ;
869 //________________________________________________________________________
870 Double_t AliPHOSPIDv1::LandauF(Double_t x, Double_t y, Double_t * par)
872 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
873 //this method returns a density probability of this parameter, given by a landau
874 //function whose parameters depend with the energy with a function: a/(x*x)+b/x+b
876 if (x > par[9]) x = par[9];
878 //Double_t cnt = par[1] / (x*x) + par[2] / x + par[0] ;
879 Double_t cnt = par[0] + par[1] * x + par[2] * x * x ;
880 Double_t mean = par[4] / (x*x) + par[5] / x + par[3] ;
881 Double_t sigma = par[7] / (x*x) + par[8] / x + par[6] ;
883 if(TMath::Abs(sigma) > 1.e-10){
884 return cnt*TMath::Landau(y,mean,sigma);
890 //________________________________________________________________________
891 Double_t AliPHOSPIDv1::LandauPol2(Double_t x, Double_t y, Double_t * par)
894 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
895 //this method returns a density probability of this parameter, given by a landau
896 //function whose parameters depend with the energy like second order polinomial
898 Double_t cnt = par[2] * (x*x) + par[1] * x + par[0] ;
899 Double_t mean = par[5] * (x*x) + par[4] * x + par[3] ;
900 Double_t sigma = par[8] * (x*x) + par[7] * x + par[6] ;
902 if(TMath::Abs(sigma) > 1.e-10){
903 return cnt*TMath::Landau(y,mean,sigma);
910 // //________________________________________________________________________
911 // Double_t AliPHOSPIDv1::ChargedHadronDistProb(Double_t x, Double_t y, Double_t * parg, Double_t * parl)
913 // Double_t cnt = 0.0 ;
914 // Double_t mean = 0.0 ;
915 // Double_t sigma = 0.0 ;
916 // Double_t arg = 0.0 ;
917 // if (y < parl[4] / (x*x) + parl[5] / x + parl[3]){
918 // cnt = parg[1] / (x*x) + parg[2] / x + parg[0] ;
919 // mean = parg[4] / (x*x) + parg[5] / x + parg[3] ;
920 // sigma = parg[7] / (x*x) + parg[8] / x + parg[6] ;
921 // TF1 * f = new TF1("gaus","gaus",0.,100.);
922 // f->SetParameters(cnt,mean,sigma);
923 // arg = f->Eval(y) ;
926 // cnt = parl[1] / (x*x) + parl[2] / x + parl[0] ;
927 // mean = parl[4] / (x*x) + parl[5] / x + parl[3] ;
928 // sigma = parl[7] / (x*x) + parl[8] / x + parl[6] ;
929 // TF1 * f = new TF1("landau","landau",0.,100.);
930 // f->SetParameters(cnt,mean,sigma);
931 // arg = f->Eval(y) ;
933 // // Double_t mean = par[3] + par[4] * x + par[5] * x * x ;
934 // // Double_t sigma = par[6] + par[7] * x + par[8] * x * x ;
936 // //Double_t arg = -(y-mean)*(y-mean)/(2*sigma*sigma) ;
937 // //return cnt * TMath::Exp(arg) ;
942 //____________________________________________________________________________
943 void AliPHOSPIDv1::MakePID()
945 // construct the PID weight from a Bayesian Method
947 const Int_t kSPECIES = AliPID::kSPECIESCN ;
949 Int_t nparticles = fRecParticles->GetEntriesFast() ;
951 if ( !fEMCRecPoints || !fCPVRecPoints || !fTrackSegments ) {
952 AliFatal("RecPoints or TrackSegments not found !") ;
955 TIter next(fTrackSegments) ;
956 AliPHOSTrackSegment * ts ;
959 Double_t * stof[kSPECIES] ;
960 Double_t * sdp [kSPECIES] ;
961 Double_t * scpv[kSPECIES] ;
962 Double_t * sw [kSPECIES] ;
963 //Info("MakePID","Begin MakePID");
965 for (Int_t i =0; i< kSPECIES; i++){
966 stof[i] = new Double_t[nparticles] ;
967 sdp [i] = new Double_t[nparticles] ;
968 scpv[i] = new Double_t[nparticles] ;
969 sw [i] = new Double_t[nparticles] ;
973 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
975 //cout<<">>>>>> Bayesian Index "<<index<<endl;
977 AliPHOSEmcRecPoint * emc = 0 ;
978 if(ts->GetEmcIndex()>=0)
979 emc = (AliPHOSEmcRecPoint *) fEMCRecPoints->At(ts->GetEmcIndex()) ;
981 // AliPHOSCpvRecPoint * cpv = 0 ;
982 // if(ts->GetCpvIndex()>=0)
983 // cpv = (AliPHOSCpvRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
985 //// Int_t track = 0 ;
986 //// track = ts->GetTrackIndex() ; //TPC tracks ?
989 AliFatal(Form("-> emc(%d)", ts->GetEmcIndex())) ;
993 // ############Tof#############################
995 // Info("MakePID", "TOF");
996 Float_t en = emc->GetEnergy();
997 Double_t time = emc->GetTime() ;
998 // cout<<">>>>>>>Energy "<<en<<"Time "<<time<<endl;
1000 // now get the signals probability
1001 // s(pid) in the Bayesian formulation
1003 //Initialize anused species
1004 for(Int_t iii=0; iii<kSPECIES; iii++)stof[iii][index]=0. ;
1006 stof[AliPID::kPhoton][index] = 1.;
1007 stof[AliPID::kElectron][index] = 1.;
1008 stof[AliPID::kEleCon][index] = 1.;
1009 //We assing the same prob to charged hadrons, sum is 1
1010 stof[AliPID::kPion][index] = 1./3.;
1011 stof[AliPID::kKaon][index] = 1./3.;
1012 stof[AliPID::kProton][index] = 1./3.;
1013 //We assing the same prob to neutral hadrons, sum is 1
1014 stof[AliPID::kNeutron][index] = 1./2.;
1015 stof[AliPID::kKaon0][index] = 1./2.;
1016 stof[AliPID::kMuon][index] = 1.;
1018 if(en < fTOFEnThreshold) {
1020 Double_t pTofPion = fTFpiong ->Eval(time) ; //gaus distribution
1021 Double_t pTofKaon = 0;
1023 if(time < fTkaonl[1])
1024 pTofKaon = fTFkaong ->Eval(time) ; //gaus distribution
1026 pTofKaon = fTFkaonl ->Eval(time) ; //landau distribution
1028 Double_t pTofNucleon = 0;
1030 if(time < fThhadronl[1])
1031 pTofNucleon = fTFhhadrong ->Eval(time) ; //gaus distribution
1033 pTofNucleon = fTFhhadronl ->Eval(time) ; //landau distribution
1034 //We assing the same prob to neutral hadrons, sum is the average prob
1035 Double_t pTofNeHadron = (pTofKaon + pTofNucleon)/2. ;
1036 //We assing the same prob to charged hadrons, sum is the average prob
1037 Double_t pTofChHadron = (pTofPion + pTofKaon + pTofNucleon)/3. ;
1039 stof[AliPID::kPhoton][index] = fTFphoton ->Eval(time) ;
1041 stof[AliPID::kEleCon][index] = stof[AliPID::kPhoton][index] ;
1042 //a conversion electron has the photon ToF
1043 stof[AliPID::kMuon][index] = stof[AliPID::kPhoton][index] ;
1045 stof[AliPID::kElectron][index] = pTofPion ;
1047 stof[AliPID::kPion][index] = pTofChHadron ;
1048 stof[AliPID::kKaon][index] = pTofChHadron ;
1049 stof[AliPID::kProton][index] = pTofChHadron ;
1051 stof[AliPID::kKaon0][index] = pTofNeHadron ;
1052 stof[AliPID::kNeutron][index] = pTofNeHadron ;
1055 // Info("MakePID", "Dispersion");
1057 // ###########Shower shape: Dispersion####################
1058 Float_t dispersion = emc->GetDispersion();
1059 //DP: Correct for non-perpendicular incidence
1060 //DP: still to be done
1062 //dispersion is not well defined if the cluster is only in few crystals
1063 //Initialize anused species
1064 for(Int_t iii=0; iii<kSPECIES; iii++)sdp[iii][index]=0. ;
1066 sdp[AliPID::kPhoton][index] = 1. ;
1067 sdp[AliPID::kElectron][index] = 1. ;
1068 sdp[AliPID::kPion][index] = 1. ;
1069 sdp[AliPID::kKaon][index] = 1. ;
1070 sdp[AliPID::kProton][index] = 1. ;
1071 sdp[AliPID::kNeutron][index] = 1. ;
1072 sdp[AliPID::kEleCon][index] = 1. ;
1073 sdp[AliPID::kKaon0][index] = 1. ;
1074 sdp[AliPID::kMuon][index] = 1. ;
1076 if(en > fDispEnThreshold && emc->GetMultiplicity() > fDispMultThreshold){
1077 sdp[AliPID::kPhoton][index] = GausF(en , dispersion, fDphoton) ;
1078 sdp[AliPID::kElectron][index] = sdp[AliPID::kPhoton][index] ;
1079 sdp[AliPID::kPion][index] = LandauF(en , dispersion, fDhadron ) ;
1080 sdp[AliPID::kKaon][index] = sdp[AliPID::kPion][index] ;
1081 sdp[AliPID::kProton][index] = sdp[AliPID::kPion][index] ;
1082 sdp[AliPID::kNeutron][index] = sdp[AliPID::kPion][index] ;
1083 sdp[AliPID::kEleCon][index] = sdp[AliPID::kPhoton][index];
1084 sdp[AliPID::kKaon0][index] = sdp[AliPID::kPion][index] ;
1085 sdp[AliPID::kMuon][index] = fDFmuon ->Eval(dispersion) ;
1086 //landau distribution
1089 // Info("MakePID","multiplicity %d, dispersion %f", emc->GetMultiplicity(), dispersion);
1090 // Info("MakePID","ss: photon %f, hadron %f ", sdp[AliPID::kPhoton][index], sdp[AliPID::kPion][index]);
1091 // cout<<">>>>>multiplicity "<<emc->GetMultiplicity()<<", dispersion "<< dispersion<<endl ;
1092 // cout<<"<<<<<ss: photon "<<sdp[AliPID::kPhoton][index]<<", hadron "<<sdp[AliPID::kPion][index]<<endl;
1094 //########## CPV-EMC Distance#######################
1095 // Info("MakePID", "Distance");
1097 Float_t x = TMath::Abs(ts->GetCpvDistance("X")) ;
1098 Float_t z = ts->GetCpvDistance("Z") ;
1101 Double_t pcpvneutral = 0. ;
1103 Double_t elprobx = GausF(en , x, fXelectron) ;
1104 Double_t elprobz = GausF(en , z, fZelectron) ;
1105 Double_t chprobx = GausF(en , x, fXcharged) ;
1106 Double_t chprobz = GausF(en , z, fZcharged) ;
1107 Double_t pcpvelectron = elprobx * elprobz;
1108 Double_t pcpvcharged = chprobx * chprobz;
1110 // cout<<">>>>energy "<<en<<endl;
1111 // cout<<">>>>electron : x "<<x<<" xprob "<<elprobx<<" z "<<z<<" zprob "<<elprobz<<endl;
1112 // cout<<">>>>hadron : x "<<x<<" xprob "<<chprobx<<" z "<<z<<" zprob "<<chprobz<<endl;
1113 // cout<<">>>>electron : px*pz "<<pcpvelectron <<" hadron: px*pz "<<pcpvcharged<<endl;
1115 // Is neutral or charged?
1116 if(pcpvelectron >= pcpvcharged)
1117 pcpv = pcpvelectron ;
1119 pcpv = pcpvcharged ;
1121 if(pcpv < fChargedNeutralThreshold)
1128 // cout<<">>>>>>>>>>>CHARGED>>>>>>>>>>>"<<endl;
1129 //Initialize anused species
1130 for(Int_t iii=0; iii<kSPECIES; iii++)scpv[iii][index]=0. ;
1132 scpv[AliPID::kPion][index] = pcpvcharged ;
1133 scpv[AliPID::kKaon][index] = pcpvcharged ;
1134 scpv[AliPID::kProton][index] = pcpvcharged ;
1136 scpv[AliPID::kMuon][index] = pcpvelectron ;
1137 scpv[AliPID::kElectron][index] = pcpvelectron ;
1138 scpv[AliPID::kEleCon][index] = pcpvelectron ;
1140 scpv[AliPID::kPhoton][index] = pcpvneutral ;
1141 scpv[AliPID::kNeutron][index] = pcpvneutral ;
1142 scpv[AliPID::kKaon0][index] = pcpvneutral ;
1145 // Info("MakePID", "CPV passed");
1147 //############## Pi0 #############################
1148 stof[AliPID::kPi0][index] = 0. ;
1149 scpv[AliPID::kPi0][index] = 0. ;
1150 sdp [AliPID::kPi0][index] = 0. ;
1153 // pi0 are detected via decay photon
1154 stof[AliPID::kPi0][index] = stof[AliPID::kPhoton][index];
1155 scpv[AliPID::kPi0][index] = pcpvneutral ;
1156 if(emc->GetMultiplicity() > fDispMultThreshold)
1157 sdp [AliPID::kPi0][index] = GausF(en , dispersion, fDpi0) ;
1158 //sdp [AliPID::kPi0][index] = GausPol2(en , dispersion, fDpi0) ;
1159 // cout<<"E = "<<en<<" GeV; disp = "<<dispersion<<"; mult = "
1160 // <<emc->GetMultiplicity()<<endl;
1161 // cout<<"PDF: photon = "<<sdp [AliPID::kPhoton][index]<<"; pi0 = "
1162 // <<sdp [AliPID::kPi0][index]<<endl;
1168 //############## muon #############################
1171 //Muons deposit few energy
1172 scpv[AliPID::kMuon][index] = 0 ;
1173 stof[AliPID::kMuon][index] = 0 ;
1174 sdp [AliPID::kMuon][index] = 0 ;
1177 //Weight to apply to hadrons due to energy reconstruction
1178 //Initialize anused species
1179 for(Int_t iii=0; iii<kSPECIES; iii++)sw[iii][index]=1. ;
1181 Float_t weight = fERecWeight ->Eval(en) ;
1183 sw[AliPID::kPhoton][index] = 1. ;
1184 sw[AliPID::kElectron][index] = 1. ;
1185 sw[AliPID::kPion][index] = weight ;
1186 sw[AliPID::kKaon][index] = weight ;
1187 sw[AliPID::kProton][index] = weight ;
1188 sw[AliPID::kNeutron][index] = weight ;
1189 sw[AliPID::kEleCon][index] = 1. ;
1190 sw[AliPID::kKaon0][index] = weight ;
1191 sw[AliPID::kMuon][index] = weight ;
1192 sw[AliPID::kPi0][index] = 1. ;
1195 // cout<<"######################################################"<<endl;
1196 // //cout<<"MakePID: energy "<<en<<", tof "<<time<<", distance "<<distance<<", dispersion "<<dispersion<<endl ;
1197 // cout<<"MakePID: energy "<<en<<", tof "<<time<<", dispersion "<<dispersion<<", x "<<x<<", z "<<z<<endl ;
1198 // cout<<">>>>>multiplicity "<<emc->GetMultiplicity()<<endl;
1199 // cout<<">>>>electron : xprob "<<elprobx<<" zprob "<<elprobz<<endl;
1200 // cout<<">>>>hadron : xprob "<<chprobx<<" zprob "<<chprobz<<endl;
1201 // cout<<">>>>electron : px*pz "<<pcpvelectron <<" hadron: px*pz "<<pcpvcharged<<endl;
1203 // cout<<"Photon , pid "<< fInitPID[AliPID::kPhoton]<<" tof "<<stof[AliPID::kPhoton][index]
1204 // <<", cpv "<<scpv[AliPID::kPhoton][index]<<", ss "<<sdp[AliPID::kPhoton][index]<<endl;
1205 // cout<<"EleCon , pid "<< fInitPID[AliPID::kEleCon]<<", tof "<<stof[AliPID::kEleCon][index]
1206 // <<", cpv "<<scpv[AliPID::kEleCon][index]<<" ss "<<sdp[AliPID::kEleCon][index]<<endl;
1207 // cout<<"Electron , pid "<< fInitPID[AliPID::kElectron]<<", tof "<<stof[AliPID::kElectron][index]
1208 // <<", cpv "<<scpv[AliPID::kElectron][index]<<" ss "<<sdp[AliPID::kElectron][index]<<endl;
1209 // cout<<"Muon , pid "<< fInitPID[AliPID::kMuon]<<", tof "<<stof[AliPID::kMuon][index]
1210 // <<", cpv "<<scpv[AliPID::kMuon][index]<<" ss "<<sdp[AliPID::kMuon][index]<<endl;
1211 // cout<<"Pi0 , pid "<< fInitPID[AliPID::kPi0]<<", tof "<<stof[AliPID::kPi0][index]
1212 // <<", cpv "<<scpv[AliPID::kPi0][index]<<" ss "<<sdp[AliPID::kPi0][index]<<endl;
1213 // cout<<"Pion , pid "<< fInitPID[AliPID::kPion]<<", tof "<<stof[AliPID::kPion][index]
1214 // <<", cpv "<<scpv[AliPID::kPion][index]<<" ss "<<sdp[AliPID::kPion][index]<<endl;
1215 // cout<<"Kaon0 , pid "<< fInitPID[AliPID::kKaon0]<<", tof "<<stof[AliPID::kKaon0][index]
1216 // <<", cpv "<<scpv[AliPID::kKaon0][index]<<" ss "<<sdp[AliPID::kKaon0][index]<<endl;
1217 // cout<<"Kaon , pid "<< fInitPID[AliPID::kKaon]<<", tof "<<stof[AliPID::kKaon][index]
1218 // <<", cpv "<<scpv[AliPID::kKaon][index]<<" ss "<<sdp[AliPID::kKaon][index]<<endl;
1219 // cout<<"Neutron , pid "<< fInitPID[AliPID::kNeutron]<<", tof "<<stof[AliPID::kNeutron][index]
1220 // <<", cpv "<<scpv[AliPID::kNeutron][index]<<" ss "<<sdp[AliPID::kNeutron][index]<<endl;
1221 // cout<<"Proton , pid "<< fInitPID[AliPID::kProton]<<", tof "<<stof[AliPID::kProton][index]
1222 // <<", cpv "<<scpv[AliPID::kProton][index]<<" ss "<<sdp[AliPID::kProton][index]<<endl;
1223 // cout<<"######################################################"<<endl;
1228 //for (index = 0 ; index < kSPECIES ; index++)
1229 // pid[index] /= nparticles ;
1232 // Info("MakePID", "Total Probability calculation");
1234 for(index = 0 ; index < nparticles ; index ++) {
1236 AliPHOSRecParticle * recpar = static_cast<AliPHOSRecParticle *>(fRecParticles->At(index));
1238 //Conversion electron?
1240 if(recpar->IsEleCon()){
1241 fInitPID[AliPID::kEleCon] = 1. ;
1242 fInitPID[AliPID::kPhoton] = 0. ;
1243 fInitPID[AliPID::kElectron] = 0. ;
1246 fInitPID[AliPID::kEleCon] = 0. ;
1247 fInitPID[AliPID::kPhoton] = 1. ;
1248 fInitPID[AliPID::kElectron] = 1. ;
1250 // fInitPID[AliPID::kEleCon] = 0. ;
1253 // calculates the Bayesian weight
1257 for (jndex = 0 ; jndex < kSPECIES ; jndex++)
1258 wn += stof[jndex][index] * sdp[jndex][index] * scpv[jndex][index] *
1259 sw[jndex][index] * fInitPID[jndex] ;
1261 // cout<<"*************wn "<<wn<<endl;
1262 if (TMath::Abs(wn)>0)
1263 for (jndex = 0 ; jndex < kSPECIES ; jndex++) {
1264 //cout<<"jndex "<<jndex<<" wn "<<wn<<" SetPID * wn"
1265 //<<stof[jndex][index] * sdp[jndex][index] * pid[jndex] << endl;
1266 //cout<<" tof "<<stof[jndex][index] << " disp " <<sdp[jndex][index] << " pid "<< fInitPID[jndex] << endl;
1267 // if(jndex == AliPID::kPi0 || jndex == AliPID::kPhoton){
1268 // cout<<"Particle "<<jndex<<" final prob * wn "
1269 // <<stof[jndex][index] * sdp[jndex][index] * scpv[jndex][index] *
1270 // fInitPID[jndex] <<" wn "<< wn<<endl;
1271 // cout<<"pid "<< fInitPID[jndex]<<", tof "<<stof[jndex][index]
1272 // <<", cpv "<<scpv[jndex][index]<<" ss "<<sdp[jndex][index]<<endl;
1274 recpar->SetPID(jndex, stof[jndex][index] * sdp[jndex][index] *
1275 sw[jndex][index] * scpv[jndex][index] *
1276 fInitPID[jndex] / wn) ;
1279 // Info("MakePID", "Delete");
1281 for (Int_t i =0; i< kSPECIES; i++){
1287 // Info("MakePID","End MakePID");
1290 //____________________________________________________________________________
1291 void AliPHOSPIDv1::MakeRecParticles()
1293 // Makes a RecParticle out of a TrackSegment
1295 if ( !fEMCRecPoints || !fCPVRecPoints || !fTrackSegments ) {
1296 AliFatal("RecPoints or TrackSegments not found !") ;
1298 fRecParticles->Clear();
1300 TIter next(fTrackSegments) ;
1301 AliPHOSTrackSegment * ts ;
1303 AliPHOSRecParticle * rp ;
1304 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
1305 // cout<<">>>>>>>>>>>>>>>PCA Index "<<index<<endl;
1306 new( (*fRecParticles)[index] ) AliPHOSRecParticle() ;
1307 rp = (AliPHOSRecParticle *)fRecParticles->At(index) ;
1308 rp->SetTrackSegment(index) ;
1309 rp->SetIndexInList(index) ;
1311 AliPHOSEmcRecPoint * emc = 0 ;
1312 if(ts->GetEmcIndex()>=0)
1313 emc = (AliPHOSEmcRecPoint *) fEMCRecPoints->At(ts->GetEmcIndex()) ;
1315 AliPHOSCpvRecPoint * cpv = 0 ;
1316 if(ts->GetCpvIndex()>=0)
1317 cpv = (AliPHOSCpvRecPoint *) fCPVRecPoints->At(ts->GetCpvIndex()) ;
1320 track = ts->GetTrackIndex() ;
1322 // Now set type (reconstructed) of the particle
1324 // Choose the cluster energy range
1327 AliFatal(Form("-> emc(%d)", ts->GetEmcIndex())) ;
1330 Float_t e = emc->GetEnergy() ;
1332 Float_t lambda[2]={0.,0.} ;
1333 emc->GetElipsAxis(lambda) ;
1335 if((lambda[0]>0.01) && (lambda[1]>0.01)){
1336 // Looking PCA. Define and calculate the data (X),
1337 // introduce in the function X2P that gives the components (P).
1339 Float_t spher = 0. ;
1340 Float_t emaxdtotal = 0. ;
1342 if((lambda[0]+lambda[1])!=0)
1343 spher=TMath::Abs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
1345 emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
1349 fX[2] = emc->GetDispersion() ;
1351 fX[4] = emc->GetMultiplicity() ;
1352 fX[5] = emaxdtotal ;
1353 fX[6] = emc->GetCoreEnergy() ;
1355 fPrincipalPhoton->X2P(fX,fPPhoton);
1356 fPrincipalPi0 ->X2P(fX,fPPi0);
1360 fPPhoton[0]=-100.0; //We do not accept clusters with
1361 fPPhoton[1]=-100.0; //one cell as a photon-like
1366 Float_t time = emc->GetTime() ;
1369 // Loop of Efficiency-Purity (the 3 points of purity or efficiency
1370 // are taken into account to set the particle identification)
1371 for(Int_t effPur = 0; effPur < 3 ; effPur++){
1373 // Looking at the CPV detector. If RCPV greater than CpvEmcDistance,
1374 // 1st,2nd or 3rd bit (depending on the efficiency-purity point )
1376 if(GetCPVBit(ts, effPur,e) == 1 ){
1377 rp->SetPIDBit(effPur) ;
1378 //cout<<"CPV bit "<<effPur<<endl;
1380 // Looking the TOF. If TOF smaller than gate, 4th, 5th or 6th
1381 // bit (depending on the efficiency-purity point )is set to 1
1382 if(time< (*fParameters)(3,effPur))
1383 rp->SetPIDBit(effPur+3) ;
1386 //If we are inside the ellipse, 7th, 8th or 9th
1387 // bit (depending on the efficiency-purity point )is set to 1
1388 if(GetPrincipalBit("photon",fPPhoton,effPur,e) == 1)
1389 rp->SetPIDBit(effPur+6) ;
1392 //If we are inside the ellipse, 10th, 11th or 12th
1393 // bit (depending on the efficiency-purity point )is set to 1
1394 if(GetPrincipalBit("pi0" ,fPPi0 ,effPur,e) == 1)
1395 rp->SetPIDBit(effPur+9) ;
1397 if(GetHardPhotonBit(emc))
1399 if(GetHardPi0Bit (emc))
1405 //Set momentum, energy and other parameters
1406 TVector3 dir = GetMomentumDirection(emc,cpv) ;
1408 rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),e) ;
1410 rp->Name(); //If photon sets the particle pdg name to gamma
1411 rp->SetProductionVertex(fVtx.X(),fVtx.Y(),fVtx.Z(),0);
1412 rp->SetFirstMother(-1);
1413 rp->SetLastMother(-1);
1414 rp->SetFirstDaughter(-1);
1415 rp->SetLastDaughter(-1);
1416 rp->SetPolarisation(0,0,0);
1417 //Set the position in global coordinate system from the RecPoint
1418 AliPHOSTrackSegment * ts1 = static_cast<AliPHOSTrackSegment *>(fTrackSegments->At(rp->GetPHOSTSIndex()));
1419 AliPHOSEmcRecPoint * erp = static_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(ts1->GetEmcIndex()));
1421 fGeom->GetGlobalPHOS(erp, pos) ;
1427 //____________________________________________________________________________
1428 void AliPHOSPIDv1::Print(const Option_t *) const
1430 // Print the parameters used for the particle type identification
1432 AliInfo("=============== AliPHOSPIDv1 ================") ;
1433 printf("Making PID\n") ;
1434 printf(" Pricipal analysis file from 0.5 to 100 %s\n", fFileNamePrincipalPhoton.Data() ) ;
1435 printf(" Name of parameters file %s\n", fFileNameParameters.Data() ) ;
1436 printf(" Matrix of Parameters: 14x4\n") ;
1437 printf(" Energy Calibration 1x3 [3 parametres to calibrate energy: A + B* E + C * E^2]\n") ;
1438 printf(" RCPV 2x3 rows x and z, columns function cut parameters\n") ;
1439 printf(" TOF 1x3 [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]\n") ;
1440 printf(" PCA 5x4 [5 ellipse parametres and 4 parametres to calculate them: A/Sqrt(E) + B* E + C * E^2 + D]\n") ;
1441 printf(" Pi0 PCA 5x3 [5 ellipse parametres and 3 parametres to calculate them: A + B* E + C * E^2]\n") ;
1442 fParameters->Print() ;
1447 //____________________________________________________________________________
1448 void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
1450 // Print table of reconstructed particles
1453 message = " found " ;
1454 message += fRecParticles->GetEntriesFast();
1455 message += " RecParticles\n" ;
1457 if(strstr(option,"all")) { // printing found TS
1458 message += "\n PARTICLE Index \n" ;
1461 for (index = 0 ; index < fRecParticles->GetEntries() ; index++) {
1462 AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) fRecParticles->At(index) ;
1464 message += rp->Name().Data() ;
1466 message += rp->GetIndexInList() ;
1468 message += rp->GetType() ;
1471 AliInfo(message.Data() ) ;
1474 //____________________________________________________________________________
1475 void AliPHOSPIDv1::SetParameters()
1477 // PCA : To do the Principal Components Analysis it is necessary
1478 // the Principal file, which is opened here
1479 fX = new double[7]; // Data for the PCA
1480 fPPhoton = new double[7]; // Eigenvalues of the PCA
1481 fPPi0 = new double[7]; // Eigenvalues of the Pi0 PCA
1483 // Read photon principals from the photon file
1485 fFileNamePrincipalPhoton = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
1486 TFile f( fFileNamePrincipalPhoton.Data(), "read" ) ;
1487 fPrincipalPhoton = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
1490 // Read pi0 principals from the pi0 file
1492 fFileNamePrincipalPi0 = "$ALICE_ROOT/PHOS/PCA_pi0_40-120.root" ;
1493 TFile fPi0( fFileNamePrincipalPi0.Data(), "read" ) ;
1494 fPrincipalPi0 = dynamic_cast<TPrincipal*> (fPi0.Get("principal")) ;
1497 // Open parameters file and initialization of the Parameters matrix.
1498 // In the File Parameters.dat are all the parameters. These are introduced
1499 // in a matrix of 16x4
1501 // All the parameters defined in this file are, in order of row:
1502 // line 0 : calibration
1503 // lines 1,2 : CPV rectangular cat for X and Z
1505 // lines 4-8 : parameters to calculate photon PCA ellipse
1506 // lines 9-13: parameters to calculate pi0 PCA ellipse
1507 // lines 14-15: parameters to calculate border for high-pt photons and pi0
1509 fFileNameParameters = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters.dat");
1510 fParameters = new TMatrixF(16,4) ;
1511 const Int_t kMaxLeng=255;
1512 char string[kMaxLeng];
1514 // Open a text file with PID parameters
1515 FILE *fd = fopen(fFileNameParameters.Data(),"r");
1517 AliFatal(Form("File %s with a PID parameters cannot be opened\n",
1518 fFileNameParameters.Data()));
1521 // Read parameter file line-by-line and skip empty line and comments
1522 while (fgets(string,kMaxLeng,fd) != NULL) {
1523 if (string[0] == '\n' ) continue;
1524 if (string[0] == '!' ) continue;
1525 sscanf(string, "%f %f %f %f",
1526 &(*fParameters)(i,0), &(*fParameters)(i,1),
1527 &(*fParameters)(i,2), &(*fParameters)(i,3));
1529 AliDebug(1, Form("Line %d: %s",i,string));
1534 //____________________________________________________________________________
1535 void AliPHOSPIDv1::SetParameterCalibration(Int_t i,Float_t param)
1537 // Set parameter "Calibration" i to a value param
1539 AliError(Form("Invalid parameter number: %d",i));
1541 (*fParameters)(0,i) = param ;
1544 //____________________________________________________________________________
1545 void AliPHOSPIDv1::SetParameterCpv2Emc(Int_t i, TString axis, Float_t cut)
1547 // Set the parameters to calculate Cpv-to-Emc Distance Cut depending on
1548 // Purity-Efficiency point i
1551 AliError(Form("Invalid parameter number: %d",i));
1554 if (axis == "x") (*fParameters)(1,i) = cut;
1555 else if (axis == "z") (*fParameters)(2,i) = cut;
1557 AliError(Form("Invalid axis name: %s",axis.Data()));
1562 //____________________________________________________________________________
1563 void AliPHOSPIDv1::SetParameterPhotonBoundary(Int_t i,Float_t param)
1565 // Set parameter "Hard photon boundary" i to a value param
1567 AliError(Form("Invalid parameter number: %d",i));
1569 (*fParameters)(14,i) = param ;
1572 //____________________________________________________________________________
1573 void AliPHOSPIDv1::SetParameterPi0Boundary(Int_t i,Float_t param)
1575 // Set parameter "Hard pi0 boundary" i to a value param
1577 AliError(Form("Invalid parameter number: %d",i));
1579 (*fParameters)(15,i) = param ;
1582 //_____________________________________________________________________________
1583 void AliPHOSPIDv1::SetParameterTimeGate(Int_t i, Float_t gate)
1585 // Set the parameter TimeGate depending on Purity-Efficiency point i
1587 AliError(Form("Invalid Efficiency-Purity choice %d",i));
1589 (*fParameters)(3,i)= gate ;
1592 //_____________________________________________________________________________
1593 void AliPHOSPIDv1::SetParameterToCalculateEllipse(TString particle, TString param, Int_t i, Float_t par)
1595 // Set the parameter "i" that is needed to calculate the ellipse
1596 // parameter "param" for a particle "particle"
1603 if (particle == "photon") offset=0;
1604 else if (particle == "pi0") offset=5;
1606 AliError(Form("Wrong particle name: %s (choose from pi0/photon)\n",
1609 if (param.Contains("a")) p=4+offset;
1610 else if(param.Contains("b")) p=5+offset;
1611 else if(param.Contains("c")) p=6+offset;
1612 else if(param.Contains("x0"))p=7+offset;
1613 else if(param.Contains("y0"))p=8+offset;
1615 AliError(Form("No parameter with index %d", i)) ;
1617 AliError(Form("No parameter with name %s", param.Data() )) ;
1619 (*fParameters)(p,i) = par ;
1622 //____________________________________________________________________________
1623 void AliPHOSPIDv1::GetVertex(void)
1624 { //extract vertex either using ESD or generator
1626 //Try to extract vertex from data
1628 const AliESDVertex *esdVtx = fESD->GetVertex() ;
1629 if(esdVtx && esdVtx->GetChi2()!=0.){
1630 fVtx.SetXYZ(esdVtx->GetXv(),esdVtx->GetYv(),esdVtx->GetZv()) ;
1635 // Use vertex diamond from CDB GRP folder if the one from ESD is missing
1637 AliWarning("Can not read vertex from data, use fixed \n") ;
1638 fVtx.SetXYZ(0.,0.,0.) ;
1641 //_______________________________________________________________________
1642 void AliPHOSPIDv1::SetInitPID(const Double_t *p) {
1643 // Sets values for the initial population of each particle type
1644 for (Int_t i=0; i<AliPID::kSPECIESCN; i++) fInitPID[i] = p[i];
1646 //_______________________________________________________________________
1647 void AliPHOSPIDv1::GetInitPID(Double_t *p) const {
1648 // Gets values for the initial population of each particle type
1649 for (Int_t i=0; i<AliPID::kSPECIESCN; i++) p[i] = fInitPID[i];