Recesses in synch with MUON
[u/mrichter/AliRoot.git] / PHOS / AliPHOSPIDv1.cxx
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6ad0bfa0 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
b2a60966 16/* $Id$ */
17
6ad0bfa0 18//_________________________________________________________________________
b2a60966 19// Implementation version v1 of the PHOS particle identifier
7acf6008 20// Particle identification based on the
148b2bba 21// - RCPV: distance from CPV recpoint to EMCA recpoint.
22// - TOF
23// - PCA: Principal Components Analysis..
24// The identified particle has an identification number corresponding
25// to a 9 bits number:
bc0c084c 26// -Bit 0 to 2: bit set if RCPV > CpvEmcDistance (each bit corresponds
148b2bba 27// to a different efficiency-purity point of the photon identification)
bc0c084c 28// -Bit 3 to 5: bit set if TOF < TimeGate (each bit corresponds
148b2bba 29// to a different efficiency-purity point of the photon identification)
30// -Bit 6 to 9: bit set if Principal Components are
50739f15 31// inside an ellipse defined by the parameters a, b, c, x0 and y0.
148b2bba 32// (each bit corresponds to a different efficiency-purity point of the
50739f15 33// photon identification)
34// The PCA (Principal components analysis) needs a file that contains
35// a previous analysis of the correlations between the particles. This
bc0c084c 36// file is $ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root. Analysis done for
50739f15 37// energies between 0.5 and 100 GeV.
9fa5f1d0 38// A calibrated energy is calculated. The energy of the reconstructed
50739f15 39// cluster is corrected with the formula A + B * E + C * E^2, whose
bc0c084c 40// parameters where obtained through the study of the reconstructed
50739f15 41// energy distribution of monoenergetic photons.
a4e98857 42//
bc0c084c 43// All the parameters (RCPV(2 rows-3 columns),TOF(1r-3c),PCA(5r-4c)
50739f15 44// and calibration(1r-3c))are stored in a file called
45// $ALICE_ROOT/PHOS/Parameters.dat. Each time that AliPHOSPIDv1 is
bc0c084c 46// initialized, this parameters are copied to a Matrix (9,4), a
50739f15 47// TMatrixD object.
7acf6008 48//
a4e98857 49// use case:
50739f15 50// root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root")
a4e98857 51// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
50739f15 52// // reading headers from file galice1.root and create RecParticles
53 // TrackSegments and RecPoints are used
54// // set file name for the branch RecParticles
f0a4c9e9 55// root [1] p->ExecuteTask("deb all time")
50739f15 56// // available options
57// // "deb" - prints # of reconstructed particles
58// // "deb all" - prints # and list of RecParticles
59// // "time" - prints benchmarking results
7acf6008 60//
50739f15 61// root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1",kTRUE)
148b2bba 62// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
50739f15 63// //Split mode.
f0a4c9e9 64// root [3] p2->ExecuteTask()
65//
50739f15 66
f0a4c9e9 67
7acf6008 68//*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
148b2bba 69// Gustavo Conesa April 2002
50739f15 70// PCA redesigned by Gustavo Conesa October 2002:
71// The way of using the PCA has changed. Instead of 2
72// files with the PCA, each one with different energy ranges
73// of application, we use the wide one (0.5-100 GeV), and instead
bc0c084c 74// of fixing 3 ellipses for different ranges of energy, it has been
50739f15 75// studied the dependency of the ellipses parameters with the
76// energy, and they are implemented in the code as a funtion
77// of the energy.
78//
79//
80//
6ad0bfa0 81// --- ROOT system ---
c947e71a 82
83
84// --- Standard library ---
acb5beb7 85#include "TFormula.h"
7acf6008 86#include "TBenchmark.h"
148b2bba 87#include "TPrincipal.h"
c947e71a 88#include "TFile.h"
e3817e5f 89#include "TSystem.h"
148b2bba 90
6ad0bfa0 91// --- AliRoot header files ---
c947e71a 92 //#include "AliLog.h"
7acf6008 93#include "AliGenerator.h"
e3817e5f 94#include "AliPHOS.h"
26d4b141 95#include "AliPHOSPIDv1.h"
7b7c1533 96#include "AliPHOSGetter.h"
6ad0bfa0 97
26d4b141 98ClassImp( AliPHOSPIDv1)
6ad0bfa0 99
6ad0bfa0 100//____________________________________________________________________________
1cb7c1ee 101AliPHOSPIDv1::AliPHOSPIDv1():AliPHOSPID()
102{
a4e98857 103 // default ctor
148b2bba 104
8d0f3f77 105 InitParameters() ;
92f521a9 106 fDefaultInit = kTRUE ;
7acf6008 107}
108
109//____________________________________________________________________________
88cb7938 110AliPHOSPIDv1::AliPHOSPIDv1(const AliPHOSPIDv1 & pid ):AliPHOSPID(pid)
581354c5 111{
386aef34 112 // ctor
581354c5 113 InitParameters() ;
581354c5 114 Init() ;
581354c5 115
116}
117
118//____________________________________________________________________________
88cb7938 119AliPHOSPIDv1::AliPHOSPIDv1(const TString alirunFileName, const TString eventFolderName):AliPHOSPID(alirunFileName, eventFolderName)
7acf6008 120{
a4e98857 121 //ctor with the indication on where to look for the track segments
7b7c1533 122
8d0f3f77 123 InitParameters() ;
2bd5457f 124 Init() ;
92f521a9 125 fDefaultInit = kFALSE ;
7acf6008 126}
7b7c1533 127
7acf6008 128//____________________________________________________________________________
129AliPHOSPIDv1::~AliPHOSPIDv1()
130{
79bb1b62 131 // dtor
acb5beb7 132 fPrincipalPhoton = 0;
133 fPrincipalPi0 = 0;
9fa5f1d0 134
e3817e5f 135 delete [] fX ; // Principal input
136 delete [] fPPhoton ; // Photon Principal components
137 delete [] fPPi0 ; // Pi0 Principal components
acb5beb7 138
139 delete fParameters;
140 delete fTFphoton;
141 delete fTFpiong;
142 delete fTFkaong;
143 delete fTFkaonl;
144 delete fTFhhadrong;
145 delete fTFhhadronl;
146 delete fDFmuon;
7acf6008 147}
148b2bba 148//____________________________________________________________________________
a496c46c 149const TString AliPHOSPIDv1::BranchName() const
150{
88cb7938 151
152 return GetName() ;
a496c46c 153}
154
155//____________________________________________________________________________
148b2bba 156void AliPHOSPIDv1::Init()
157{
158 // Make all memory allocations that are not possible in default constructor
159 // Add the PID task to the list of PHOS tasks
a496c46c 160
adcca1e6 161 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
162 if(!gime)
163 gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data()) ;
88cb7938 164
165 if ( !gime->PID() )
166 gime->PostPID(this) ;
148b2bba 167}
8d0f3f77 168
169//____________________________________________________________________________
170void AliPHOSPIDv1::InitParameters()
171{
e3817e5f 172 // Initialize PID parameters
adcca1e6 173 fWrite = kTRUE ;
8d0f3f77 174 fRecParticlesInRun = 0 ;
8d0f3f77 175 fNEvent = 0 ;
8d0f3f77 176 fRecParticlesInRun = 0 ;
35adb638 177 fBayesian = kTRUE ;
9fa5f1d0 178 SetParameters() ; // fill the parameters matrix from parameters file
eabde521 179 SetEventRange(0,-1) ;
35adb638 180
cc1fe362 181 // initialisation of response function parameters
182 // Tof
183 // Photons
35adb638 184 fTphoton[0] = 0.218 ;
185 //fTphoton[0] = 1. ;
186 fTphoton[1] = 1.55E-8 ;
187 fTphoton[2] = 5.05E-10 ;
188 fTFphoton = new TFormula("ToF response to photons" , "gaus") ;
cc1fe362 189 fTFphoton->SetParameters( fTphoton[0], fTphoton[1], fTphoton[2]) ;
35adb638 190// // Electrons
191// fTelectron[0] = 0.2 ;
192// fTelectron[1] = 1.55E-8 ;
193// fTelectron[2] = 5.35E-10 ;
194// fTFelectron = new TFormula("ToF response to electrons" , "gaus") ;
195// fTFelectron->SetParameters( fTelectron[0], fTelectron[1], fTelectron[2]) ;
196// // Muons
197// fTmuon[0] = 0.2 ;
198// fTmuon[1] = 1.55E-8 ;
199// fTmuon[2] = 5.1E-10 ;
200// fTFmuon = new TFormula("ToF response to muons" , "gaus") ;
201// fTFmuon->SetParameters( fTmuon[0], fTmuon[1], fTmuon[2]) ;
202
203 // Pions
204 //Gaus (0 to max probability)
205 fTpiong[0] = 0.0971 ;
206 //fTpiong[0] = 1. ;
207 fTpiong[1] = 1.58E-8 ;
208 fTpiong[2] = 5.69E-10 ;
209 fTFpiong = new TFormula("ToF response to pions" , "gaus") ;
210 fTFpiong->SetParameters( fTpiong[0], fTpiong[1], fTpiong[2]) ;
211 // Landau (max probability to inf)
212// fTpionl[0] = 0.05 ;
213// //fTpionl[0] = 5.53 ;
214// fTpionl[1] = 1.68E-8 ;
215// fTpionl[2] = 5.38E-10 ;
216// fTFpionl = new TFormula("ToF response to pions" , "landau") ;
217// fTFpionl->SetParameters( fTpionl[0], fTpionl[1], fTpionl[2]) ;
218
219
220 // Kaons
221 //Gaus (0 to max probability)
222 fTkaong[0] = 0.0542 ;
223 //fTkaong[0] = 1. ;
224 fTkaong[1] = 1.64E-8 ;
225 fTkaong[2] = 6.07-10 ;
226 fTFkaong = new TFormula("ToF response to kaon" , "gaus") ;
227 fTFkaong->SetParameters( fTkaong[0], fTkaong[1], fTkaong[2]) ;
228 //Landau (max probability to inf)
229 fTkaonl[0] = 0.264 ;
230 //fTkaonl[0] = 5.53 ;
231 fTkaonl[1] = 1.68E-8 ;
232 fTkaonl[2] = 4.10E-10 ;
233 fTFkaonl = new TFormula("ToF response to kaon" , "landau") ;
234 fTFkaonl->SetParameters( fTkaonl[0], fTkaonl[1], fTkaonl[2]) ;
235
236 //Heavy Hadrons
237 //Gaus (0 to max probability)
238 fThhadrong[0] = 0.0302 ;
239 //fThhadrong[0] = 1. ;
240 fThhadrong[1] = 1.73E-8 ;
241 fThhadrong[2] = 9.52E-10 ;
242 fTFhhadrong = new TFormula("ToF response to heavy hadrons" , "gaus") ;
243 fTFhhadrong->SetParameters( fThhadrong[0], fThhadrong[1], fThhadrong[2]) ;
244 //Landau (max probability to inf)
245 fThhadronl[0] = 0.139 ;
246 //fThhadronl[0] = 5.53 ;
247 fThhadronl[1] = 1.745E-8 ;
248 fThhadronl[2] = 1.00E-9 ;
249 fTFhhadronl = new TFormula("ToF response to heavy hadrons" , "landau") ;
250 fTFhhadronl->SetParameters( fThhadronl[0], fThhadronl[1], fThhadronl[2]) ;
251
252/// /gaussian parametrization for pions
253// fTpion[0] = 3.93E-2 ; fTpion[1] = 0.130 ; fTpion[2] =-6.37E-2 ;//constant
254// fTpion[3] = 1.65E-8 ; fTpion[4] =-1.40E-9 ; fTpion[5] = 5.96E-10;//mean
255// fTpion[6] = 8.09E-10; fTpion[7] =-4.65E-10; fTpion[8] = 1.50E-10;//sigma
256
257// //landau parametrization for kaons
258// fTkaon[0] = 0.107 ; fTkaon[1] = 0.166 ; fTkaon[2] = 0.243 ;//constant
259// fTkaon[3] = 1.80E-8 ; fTkaon[4] =-2.96E-9 ; fTkaon[5] = 9.60E-10;//mean
260// fTkaon[6] = 1.37E-9 ; fTkaon[7] =-1.80E-9 ; fTkaon[8] = 6.74E-10;//sigma
261
262// //landau parametrization for nucleons
263// fThhadron[0] = 6.33E-2 ; fThhadron[1] = 2.52E-2 ; fThhadron[2] = 2.16E-2 ;//constant
264// fThhadron[3] = 1.94E-8 ; fThhadron[4] =-7.06E-10; fThhadron[5] =-4.69E-10;//mean
265// fThhadron[6] = 2.55E-9 ; fThhadron[7] =-1.90E-9 ; fThhadron[8] = 5.41E-10;//sigma
266
267
268 // Shower shape: dispersion gaussian parameters
269 // Photons
270
c947e71a 271// fDphoton[0] = 3.84e-2; fDphoton[1] = 4.46e-3 ; fDphoton[2] = -2.36e-2;//constant
272// //fDphoton[0] = 1.0 ; fDphoton[1] = 0. ; fDphoton[2] = 0. ;//constant
273// fDphoton[3] = 1.55 ; fDphoton[4] =-0.0863 ; fDphoton[5] = 0.287 ;//mean
274// fDphoton[6] = 0.0451 ; fDphoton[7] =-0.0803 ; fDphoton[8] = 0.314 ;//sigma
275
276 fDphoton[0] = 4.62e-2; fDphoton[1] = 1.39e-2 ; fDphoton[2] = -3.80e-2;//constant
277 //fDphoton[0] = 1.0 ; fDphoton[1] = 0. ; fDphoton[2] = 0. ;//constant
278 fDphoton[3] = 1.53 ; fDphoton[4] =-6.62e-2 ; fDphoton[5] = 0.339 ;//mean
279 fDphoton[6] = 6.89e-2; fDphoton[7] =-6.59e-2 ; fDphoton[8] = 0.194 ;//sigma
35adb638 280
281 fDpi0[0] = 0.0586 ; fDpi0[1] = 1.06E-3 ; fDpi0[2] = 0. ;//constant
282 //fDpi0[0] = 1.0 ; fDpi0[1] = 0.0 ; fDpi0[2] = 0. ;//constant
283 fDpi0[3] = 2.67 ; fDpi0[4] =-2.00E-2 ; fDpi0[5] = 9.37E-5 ;//mean
284 fDpi0[6] = 0.153 ; fDpi0[7] = 9.34E-4 ; fDpi0[8] =-1.49E-5 ;//sigma
285 //landau
286// fDhadron[0] = 0.007 ; fDhadron[1] = 0. ; fDhadron[2] = 0. ;//constant
287// //fDhadron[0] = 5.53 ; fDhadron[1] = 0. ; fDhadron[2] = 0. ;//constant
288// fDhadron[3] = 3.38 ; fDhadron[4] = 0.0833 ; fDhadron[5] =-0.845 ;//mean
289// fDhadron[6] = 0.627 ; fDhadron[7] = 0.012 ; fDhadron[8] =-0.170 ;//sigma
290
c947e71a 291 fDhadron[0] = 1.61E-2 ; fDhadron[1] = 3.03E-3 ; fDhadron[2] = 1.01E-2 ;//constant
292 fDhadron[3] = 3.81 ; fDhadron[4] = 0.232 ; fDhadron[5] =-1.25 ;//mean
293 fDhadron[6] = 0.897 ; fDhadron[7] = 0.0987 ; fDhadron[8] =-0.534 ;//sigma
35adb638 294 // Muons
295 fDmuon[0] = 0.0631 ;
296 fDmuon[1] = 1.4 ;
297 fDmuon[2] = 0.0557 ;
298 fDFmuon = new TFormula("Shower shape response to muons" , "landau") ;
299 fDFmuon->SetParameters( fDmuon[0], fDmuon[1], fDmuon[2]) ;
300
35adb638 301
c947e71a 302 // x(CPV-EMC) distance gaussian parameters
303
304 fXelectron[0] = 8.06e-2 ; fXelectron[1] = 1.00e-2; fXelectron[2] =-5.14e-2;//constant
305 //fXelectron[0] = 1.0 ; fXelectron[1] = 0. ; fXelectron[2] = 0. ;//constant
306 fXelectron[3] = 0.202 ; fXelectron[4] = 8.15e-3; fXelectron[5] = 4.55 ;//mean
307 fXelectron[6] = 0.334 ; fXelectron[7] = 0.186 ; fXelectron[8] = 4.32e-2;//sigma
308
309 //charged hadrons gaus
310 fXcharged[0] = 6.43e-3 ; fXcharged[1] =-4.19e-5; fXcharged[2] = 1.42e-3;//constant
311 fXcharged[3] = 2.75 ; fXcharged[4] =-0.40 ; fXcharged[5] = 1.68 ;//mean
312 fXcharged[6] = 3.135 ; fXcharged[7] =-9.41e-2; fXcharged[8] = 1.31e-2;//sigma
313
314 // z(CPV-EMC) distance gaussian parameters
315
316 fZelectron[0] = 8.22e-2 ; fZelectron[1] = 5.11e-3; fZelectron[2] =-3.05e-2;//constant
317 //fZelectron[0] = 1.0 ; fZelectron[1] = 0. ; fZelectron[2] = 0. ;//constant
318 fZelectron[3] = 3.09e-2 ; fZelectron[4] = 5.87e-2; fZelectron[5] =-9.49e-2;//mean
319 fZelectron[6] = 0.263 ; fZelectron[7] =-9.02e-3; fZelectron[8] = 0.151 ;//sigma
320
321 //charged hadrons gaus
322
323 fZcharged[0] = 1.00e-2 ; fZcharged[1] = 2.82E-4 ; fZcharged[2] = 2.87E-3 ;//constant
324 fZcharged[3] =-4.68e-2 ; fZcharged[4] =-9.21e-3 ; fZcharged[5] = 4.91e-2 ;//mean
325 fZcharged[6] = 1.425 ; fZcharged[7] =-5.90e-2 ; fZcharged[8] = 5.07e-2 ;//sigma
326
304864ab 327 for (Int_t i =0; i< AliPID::kSPECIESN ; i++)
35adb638 328 fInitPID[i] = 1.;
329
8d0f3f77 330}
331
88cb7938 332//________________________________________________________________________
eabde521 333void AliPHOSPIDv1::Exec(Option_t *option)
88cb7938 334{
eabde521 335 // Steering method to perform particle reconstruction and identification
336 // for the event range from fFirstEvent to fLastEvent.
337 // This range is optionally set by SetEventRange().
338 // if fLastEvent=-1 (by default), then process events until the end.
61d3d6aa 339
88cb7938 340 if(strstr(option,"tim"))
341 gBenchmark->Start("PHOSPID");
342
343 if(strstr(option,"print")) {
344 Print() ;
345 return ;
346 }
347
348
adcca1e6 349 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
88cb7938 350
71cee46d 351 if (fLastEvent == -1)
352 fLastEvent = gime->MaxEvent() - 1 ;
353 else
354 fLastEvent = TMath::Min(fLastEvent,gime->MaxEvent());
eabde521 355 Int_t nEvents = fLastEvent - fFirstEvent + 1;
88cb7938 356
71cee46d 357 Int_t ievent ;
358 for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
88cb7938 359 gime->Event(ievent,"TR") ;
360 if(gime->TrackSegments() && //Skip events, where no track segments made
361 gime->TrackSegments()->GetEntriesFast()) {
7fb46731 362
88cb7938 363 MakeRecParticles() ;
35adb638 364
365 if(fBayesian)
366 MakePID() ;
367
90cceaf6 368 WriteRecParticles();
88cb7938 369 if(strstr(option,"deb"))
370 PrintRecParticles(option) ;
371 //increment the total number of rec particles per run
372 fRecParticlesInRun += gime->RecParticles()->GetEntriesFast() ;
373 }
374 }
ff417097 375 if(strstr(option,"deb"))
376 PrintRecParticles(option);
88cb7938 377 if(strstr(option,"tim")){
378 gBenchmark->Stop("PHOSPID");
351dd634 379 AliInfo(Form("took %f seconds for PID %f seconds per event",
88cb7938 380 gBenchmark->GetCpuTime("PHOSPID"),
351dd634 381 gBenchmark->GetCpuTime("PHOSPID")/nEvents)) ;
88cb7938 382 }
adcca1e6 383 if(fWrite)
384 Unload();
88cb7938 385}
386
35adb638 387//________________________________________________________________________
17323043 388Double_t AliPHOSPIDv1::GausF(Double_t x, Double_t y, Double_t * par)
35adb638 389{
c947e71a 390 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
391 //this method returns a density probability of this parameter, given by a gaussian
392 //function whose parameters depend with the energy with a function: a/(x*x)+b/x+b
393 Double_t cnt = par[1] / (x*x) + par[2] / x + par[0] ;
35adb638 394 Double_t mean = par[4] / (x*x) + par[5] / x + par[3] ;
395 Double_t sigma = par[7] / (x*x) + par[8] / x + par[6] ;
c947e71a 396
35adb638 397 // Double_t arg = - (y-mean) * (y-mean) / (2*sigma*sigma) ;
398 // return cnt * TMath::Exp(arg) ;
c947e71a 399 if(TMath::Abs(sigma) > 1.e-10){
acb5beb7 400 return cnt*TMath::Gaus(y,mean,sigma);
35adb638 401 }
402 else
403 return 0.;
c947e71a 404
35adb638 405}
406//________________________________________________________________________
17323043 407Double_t AliPHOSPIDv1::GausPol2(Double_t x, Double_t y, Double_t * par)
35adb638 408{
c947e71a 409 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
410 //this method returns a density probability of this parameter, given by a gaussian
411 //function whose parameters depend with the energy like second order polinomial
412
35adb638 413 Double_t cnt = par[0] + par[1] * x + par[2] * x * x ;
414 Double_t mean = par[3] + par[4] * x + par[5] * x * x ;
415 Double_t sigma = par[6] + par[7] * x + par[8] * x * x ;
416
c947e71a 417 if(TMath::Abs(sigma) > 1.e-10){
acb5beb7 418 return cnt*TMath::Gaus(y,mean,sigma);
35adb638 419 }
420 else
421 return 0.;
c947e71a 422
423
424
35adb638 425}
426
1cb7c1ee 427//____________________________________________________________________________
e3817e5f 428const TString AliPHOSPIDv1::GetFileNamePrincipal(TString particle) const
148b2bba 429{
e3817e5f 430 //Get file name that contains the PCA for a particle ("photon or pi0")
431 particle.ToLower();
432 TString name;
351dd634 433 if (particle=="photon")
434 name = fFileNamePrincipalPhoton ;
435 else if (particle=="pi0" )
436 name = fFileNamePrincipalPi0 ;
437 else
438 AliError(Form("Wrong particle name: %s (choose from pi0/photon)\n",
439 particle.Data()));
e3817e5f 440 return name;
441}
bc0c084c 442
e3817e5f 443//____________________________________________________________________________
fc7e2f43 444Float_t AliPHOSPIDv1::GetParameterCalibration(Int_t i) const
e3817e5f 445{
446 // Get the i-th parameter "Calibration"
447 Float_t param = 0.;
351dd634 448 if (i>2 || i<0) {
449 AliError(Form("Invalid parameter number: %d",i));
450 } else
e3817e5f 451 param = (*fParameters)(0,i);
452 return param;
453}
bc0c084c 454
e3817e5f 455//____________________________________________________________________________
fc7e2f43 456Float_t AliPHOSPIDv1::GetCalibratedEnergy(Float_t e) const
88cb7938 457{
458// It calibrates Energy depending on the recpoint energy.
459// The energy of the reconstructed cluster is corrected with
460// the formula A + B* E + C* E^2, whose parameters where obtained
461// through the study of the reconstructed energy distribution of
462// monoenergetic photons.
463
464 Float_t p[]={0.,0.,0.};
465 for (Int_t i=0; i<3; i++) p[i] = GetParameterCalibration(i);
466 Float_t enerec = p[0] + p[1]*e + p[2]*e*e;
467 return enerec ;
468
469}
470
471//____________________________________________________________________________
fc7e2f43 472Float_t AliPHOSPIDv1::GetParameterCpv2Emc(Int_t i, TString axis) const
e3817e5f 473{
474 // Get the i-th parameter "CPV-EMC distance" for the specified axis
475 Float_t param = 0.;
351dd634 476 if(i>2 || i<0) {
477 AliError(Form("Invalid parameter number: %d",i));
478 } else {
e3817e5f 479 axis.ToLower();
351dd634 480 if (axis == "x")
481 param = (*fParameters)(1,i);
482 else if (axis == "z")
483 param = (*fParameters)(2,i);
484 else {
485 AliError(Form("Invalid axis name: %s",axis.Data()));
486 }
e3817e5f 487 }
488 return param;
489}
490
491//____________________________________________________________________________
fc7e2f43 492Float_t AliPHOSPIDv1::GetCpv2EmcDistanceCut(TString axis, Float_t e) const
e3817e5f 493{
88cb7938 494 // Get CpvtoEmcDistance Cut depending on the cluster energy, axis and
495 // Purity-Efficiency point
496
497 axis.ToLower();
498 Float_t p[]={0.,0.,0.};
499 for (Int_t i=0; i<3; i++) p[i] = GetParameterCpv2Emc(i,axis);
500 Float_t sig = p[0] + TMath::Exp(p[1] - p[2]*e);
501 return sig;
e3817e5f 502}
503
88cb7938 504//____________________________________________________________________________
fc7e2f43 505Float_t AliPHOSPIDv1::GetEllipseParameter(TString particle, TString param, Float_t e) const
88cb7938 506{
507 // Calculates the parameter param of the ellipse
e3817e5f 508
509 particle.ToLower();
510 param. ToLower();
88cb7938 511 Float_t p[4]={0.,0.,0.,0.};
512 Float_t value = 0.0;
513 for (Int_t i=0; i<4; i++) p[i] = GetParameterToCalculateEllipse(particle,param,i);
514 if (particle == "photon") {
515 if (param.Contains("a")) e = TMath::Min((Double_t)e,70.);
516 else if (param.Contains("b")) e = TMath::Min((Double_t)e,70.);
517 else if (param.Contains("x0")) e = TMath::Max((Double_t)e,1.1);
518 }
e3817e5f 519
443caba9 520 if (particle == "photon")
521 value = p[0]/TMath::Sqrt(e) + p[1]*e + p[2]*e*e + p[3];
522 else if (particle == "pi0")
523 value = p[0] + p[1]*e + p[2]*e*e;
524
88cb7938 525 return value;
e3817e5f 526}
527
528//_____________________________________________________________________________
fc7e2f43 529Float_t AliPHOSPIDv1::GetParameterPhotonBoundary (Int_t i) const
e3817e5f 530{
531 // Get the parameter "i" to calculate the boundary on the moment M2x
532 // for photons at high p_T
533 Float_t param = 0;
351dd634 534 if (i>3 || i<0) {
535 AliError(Form("Wrong parameter number: %d\n",i));
536 } else
e3817e5f 537 param = (*fParameters)(14,i) ;
538 return param;
148b2bba 539}
e3817e5f 540
148b2bba 541//____________________________________________________________________________
fc7e2f43 542Float_t AliPHOSPIDv1::GetParameterPi0Boundary (Int_t i) const
e3817e5f 543{
544 // Get the parameter "i" to calculate the boundary on the moment M2x
545 // for pi0 at high p_T
546 Float_t param = 0;
351dd634 547 if (i>2 || i<0) {
548 AliError(Form("Wrong parameter number: %d\n",i));
549 } else
e3817e5f 550 param = (*fParameters)(15,i) ;
551 return param;
552}
148b2bba 553
e3817e5f 554//____________________________________________________________________________
fc7e2f43 555Float_t AliPHOSPIDv1::GetParameterTimeGate(Int_t i) const
e3817e5f 556{
88cb7938 557 // Get TimeGate parameter depending on Purity-Efficiency i:
558 // i=0 - Low purity, i=1 - Medium purity, i=2 - High purity
559 Float_t param = 0.;
351dd634 560 if(i>2 || i<0) {
561 AliError(Form("Invalid Efficiency-Purity choice %d",i));
562 } else
88cb7938 563 param = (*fParameters)(3,i) ;
564 return param;
e3817e5f 565}
566
e3817e5f 567//_____________________________________________________________________________
fc7e2f43 568Float_t AliPHOSPIDv1::GetParameterToCalculateEllipse(TString particle, TString param, Int_t i) const
88cb7938 569{
570 // Get the parameter "i" that is needed to calculate the ellipse
571 // parameter "param" for the particle "particle" ("photon" or "pi0")
572
e3817e5f 573 particle.ToLower();
574 param. ToLower();
88cb7938 575 Int_t offset = -1;
351dd634 576 if (particle == "photon")
577 offset=0;
578 else if (particle == "pi0")
579 offset=5;
e3817e5f 580 else
351dd634 581 AliError(Form("Wrong particle name: %s (choose from pi0/photon)\n",
582 particle.Data()));
88cb7938 583
584 Int_t p= -1;
585 Float_t par = 0;
e3817e5f 586
587 if (param.Contains("a")) p=4+offset;
588 else if(param.Contains("b")) p=5+offset;
589 else if(param.Contains("c")) p=6+offset;
590 else if(param.Contains("x0"))p=7+offset;
591 else if(param.Contains("y0"))p=8+offset;
12022e83 592
351dd634 593 if (i>4 || i<0) {
594 AliError(Form("No parameter with index %d", i)) ;
595 } else if (p==-1) {
596 AliError(Form("No parameter with name %s", param.Data() )) ;
597 } else
88cb7938 598 par = (*fParameters)(p,i) ;
599
600 return par;
12022e83 601}
602
12022e83 603
604//____________________________________________________________________________
8d4608b5 605Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSCpvRecPoint * cpv, Option_t * axis)const
69183710 606{
607 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
148b2bba 608
88cb7938 609 const AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ;
69183710 610 TVector3 vecEmc ;
7acf6008 611 TVector3 vecCpv ;
148b2bba 612 if(cpv){
613 emc->GetLocalPosition(vecEmc) ;
614 cpv->GetLocalPosition(vecCpv) ;
2bb500e5 615
148b2bba 616 if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
617 // Correct to difference in CPV and EMC position due to different distance to center.
618 // we assume, that particle moves from center
619 Float_t dCPV = geom->GetIPtoOuterCoverDistance();
620 Float_t dEMC = geom->GetIPtoCrystalSurface() ;
621 dEMC = dEMC / dCPV ;
622 vecCpv = dEMC * vecCpv - vecEmc ;
e3817e5f 623 if (axis == "X") return vecCpv.X();
624 if (axis == "Y") return vecCpv.Y();
625 if (axis == "Z") return vecCpv.Z();
626 if (axis == "R") return vecCpv.Mag();
627 }
148b2bba 628 return 100000000 ;
629 }
7acf6008 630 return 100000000 ;
69183710 631}
bc0c084c 632//____________________________________________________________________________
8d4608b5 633Int_t AliPHOSPIDv1::GetCPVBit(AliPHOSEmcRecPoint * emc,AliPHOSCpvRecPoint * cpv, Int_t effPur, Float_t e) const
bc0c084c 634{
c947e71a 635 //Calculates the pid bit for the CPV selection per each purity.
e3817e5f 636 if(effPur>2 || effPur<0)
351dd634 637 AliError(Form("Invalid Efficiency-Purity choice %d",effPur));
bc0c084c 638
e3817e5f 639 Float_t sigX = GetCpv2EmcDistanceCut("X",e);
640 Float_t sigZ = GetCpv2EmcDistanceCut("Z",e);
bc0c084c 641
642 Float_t deltaX = TMath::Abs(GetDistance(emc, cpv, "X"));
643 Float_t deltaZ = TMath::Abs(GetDistance(emc, cpv, "Z"));
7fb46731 644 //Info("GetCPVBit"," xdist %f, sigx %f, zdist %f, sigz %f",deltaX, sigX, deltaZ,sigZ) ;
645
646 //if(deltaX>sigX*(effPur+1))
647 //if((deltaX>sigX*(effPur+1)) || (deltaZ>sigZ*(effPur+1)))
648 if((deltaX>sigX*(effPur+1)) && (deltaZ>sigZ*(effPur+1)))
bc0c084c 649 return 1;//Neutral
650 else
651 return 0;//Charged
bc0c084c 652}
69183710 653
69183710 654//____________________________________________________________________________
fc7e2f43 655Int_t AliPHOSPIDv1::GetPrincipalBit(TString particle, const Double_t* p, Int_t effPur, Float_t e)const
148b2bba 656{
50739f15 657 //Is the particle inside de PCA ellipse?
581354c5 658
e3817e5f 659 particle.ToLower();
660 Int_t prinbit = 0 ;
7fb46731 661 Float_t a = GetEllipseParameter(particle,"a" , e);
662 Float_t b = GetEllipseParameter(particle,"b" , e);
663 Float_t c = GetEllipseParameter(particle,"c" , e);
e3817e5f 664 Float_t x0 = GetEllipseParameter(particle,"x0", e);
665 Float_t y0 = GetEllipseParameter(particle,"y0", e);
666
667 Float_t r = TMath::Power((p[0] - x0)/a,2) +
668 TMath::Power((p[1] - y0)/b,2) +
669 c*(p[0] - x0)*(p[1] - y0)/(a*b) ;
50739f15 670 //3 different ellipses defined
e3817e5f 671 if((effPur==2) && (r<1./2.)) prinbit= 1;
672 if((effPur==1) && (r<2. )) prinbit= 1;
673 if((effPur==0) && (r<9./2.)) prinbit= 1;
50739f15 674
581354c5 675 if(r<0)
351dd634 676 AliError("Negative square?") ;
1f0e7ccd 677
678 return prinbit;
148b2bba 679
148b2bba 680}
1f0e7ccd 681//____________________________________________________________________________
fc7e2f43 682Int_t AliPHOSPIDv1::GetHardPhotonBit(AliPHOSEmcRecPoint * emc) const
1f0e7ccd 683{
e3817e5f 684 // Set bit for identified hard photons (E > 30 GeV)
685 // if the second moment M2x is below the boundary
686
687 Float_t e = emc->GetEnergy();
688 if (e < 30.0) return 0;
689 Float_t m2x = emc->GetM2x();
690 Float_t m2xBoundary = GetParameterPhotonBoundary(0) *
691 TMath::Exp(-TMath::Power(e-GetParameterPhotonBoundary(1),2)/2.0/
692 TMath::Power(GetParameterPhotonBoundary(2),2)) +
693 GetParameterPhotonBoundary(3);
351dd634 694 AliDebug(1, Form("GetHardPhotonBit","E=%f, m2x=%f, boundary=%f",
695 e,m2x,m2xBoundary));
e3817e5f 696 if (m2x < m2xBoundary)
697 return 1;// A hard photon
698 else
699 return 0;// Not a hard photon
1f0e7ccd 700}
92f521a9 701
e3817e5f 702//____________________________________________________________________________
fc7e2f43 703Int_t AliPHOSPIDv1::GetHardPi0Bit(AliPHOSEmcRecPoint * emc) const
e3817e5f 704{
705 // Set bit for identified hard pi0 (E > 30 GeV)
706 // if the second moment M2x is above the boundary
707
708 Float_t e = emc->GetEnergy();
709 if (e < 30.0) return 0;
710 Float_t m2x = emc->GetM2x();
711 Float_t m2xBoundary = GetParameterPi0Boundary(0) +
712 e * GetParameterPi0Boundary(1);
351dd634 713 AliDebug(1,Form("E=%f, m2x=%f, boundary=%f",e,m2x,m2xBoundary));
e3817e5f 714 if (m2x > m2xBoundary)
715 return 1;// A hard pi0
bc0c084c 716 else
e3817e5f 717 return 0;// Not a hard pi0
f0a4c9e9 718}
e3817e5f 719
720//____________________________________________________________________________
8d4608b5 721TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSCpvRecPoint * )const
88cb7938 722{
723 // Calculates the momentum direction:
724 // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
725 // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
726 // However because of the poor position resolution of PPSD the direction is always taken as if we were
727 // in case 1.
f0a4c9e9 728
88cb7938 729 TVector3 dir(0,0,0) ;
9688c1dd 730
88cb7938 731 TVector3 emcglobalpos ;
732 TMatrix dummy ;
bf8f1fbd 733
88cb7938 734 emc->GetGlobalPosition(emcglobalpos, dummy) ;
e3817e5f 735
88cb7938 736 dir = emcglobalpos ;
e3817e5f 737
88cb7938 738 //account correction to the position of IP
739 Float_t xo,yo,zo ; //Coordinates of the origin
7fb46731 740 if(gAlice && gAlice->GetMCApp() && gAlice->Generator()){
adcca1e6 741 gAlice->Generator()->GetOrigin(xo,yo,zo) ;
7fb46731 742 }
adcca1e6 743 else{
744 xo=yo=zo=0.;
745 }
88cb7938 746 TVector3 origin(xo,yo,zo);
747 dir = dir - origin ;
7fb46731 748 dir.SetMag(1.) ;
e3817e5f 749
88cb7938 750 return dir ;
7acf6008 751}
7b7c1533 752
35adb638 753//________________________________________________________________________
17323043 754Double_t AliPHOSPIDv1::LandauF(Double_t x, Double_t y, Double_t * par)
35adb638 755{
c947e71a 756 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
757 //this method returns a density probability of this parameter, given by a landau
758 //function whose parameters depend with the energy with a function: a/(x*x)+b/x+b
759
760 Double_t cnt = par[1] / (x*x) + par[2] / x + par[0] ;
35adb638 761 Double_t mean = par[4] / (x*x) + par[5] / x + par[3] ;
762 Double_t sigma = par[7] / (x*x) + par[8] / x + par[6] ;
c947e71a 763
764 if(TMath::Abs(sigma) > 1.e-10){
acb5beb7 765 return cnt*TMath::Landau(y,mean,sigma);
35adb638 766 }
767 else
768 return 0.;
769
770}
771//________________________________________________________________________
17323043 772Double_t AliPHOSPIDv1::LandauPol2(Double_t x, Double_t y, Double_t * par)
35adb638 773{
c947e71a 774
775 //Given the energy x and the parameter y (tof, shower dispersion or cpv-emc distance),
776 //this method returns a density probability of this parameter, given by a landau
777 //function whose parameters depend with the energy like second order polinomial
778
35adb638 779 Double_t cnt = par[2] * (x*x) + par[1] * x + par[0] ;
c947e71a 780 Double_t mean = par[5] * (x*x) + par[4] * x + par[3] ;
781 Double_t sigma = par[8] * (x*x) + par[7] * x + par[6] ;
35adb638 782
c947e71a 783 if(TMath::Abs(sigma) > 1.e-10){
acb5beb7 784 return cnt*TMath::Landau(y,mean,sigma);
35adb638 785 }
786 else
787 return 0.;
c947e71a 788
789
35adb638 790}
791// //________________________________________________________________________
792// Double_t AliPHOSPIDv1::ChargedHadronDistProb(Double_t x, Double_t y, Double_t * parg, Double_t * parl)
793// {
794// Double_t cnt = 0.0 ;
795// Double_t mean = 0.0 ;
796// Double_t sigma = 0.0 ;
797// Double_t arg = 0.0 ;
798// if (y < parl[4] / (x*x) + parl[5] / x + parl[3]){
799// cnt = parg[1] / (x*x) + parg[2] / x + parg[0] ;
800// mean = parg[4] / (x*x) + parg[5] / x + parg[3] ;
801// sigma = parg[7] / (x*x) + parg[8] / x + parg[6] ;
802// TF1 * f = new TF1("gaus","gaus",0.,100.);
803// f->SetParameters(cnt,mean,sigma);
804// arg = f->Eval(y) ;
805// }
806// else{
807// cnt = parl[1] / (x*x) + parl[2] / x + parl[0] ;
808// mean = parl[4] / (x*x) + parl[5] / x + parl[3] ;
809// sigma = parl[7] / (x*x) + parl[8] / x + parl[6] ;
810// TF1 * f = new TF1("landau","landau",0.,100.);
811// f->SetParameters(cnt,mean,sigma);
812// arg = f->Eval(y) ;
813// }
814// // Double_t mean = par[3] + par[4] * x + par[5] * x * x ;
815// // Double_t sigma = par[6] + par[7] * x + par[8] * x * x ;
816
817// //Double_t arg = -(y-mean)*(y-mean)/(2*sigma*sigma) ;
818// //return cnt * TMath::Exp(arg) ;
819
820// return arg;
821
822// }
7b7c1533 823//____________________________________________________________________________
2cc71c1e 824void AliPHOSPIDv1::MakePID()
825{
826 // construct the PID weight from a Bayesian Method
c947e71a 827
304864ab 828 const Int_t kSPECIES = AliPID::kSPECIESN ;
7fb46731 829
830 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
831
832 Int_t nparticles = gime->RecParticles()->GetEntriesFast() ;
833
c947e71a 834 // const Int_t kMAXPARTICLES = 2000 ;
835 // if (nparticles >= kMAXPARTICLES)
836 // Error("MakePID", "Change size of MAXPARTICLES") ;
837 // Double_t stof[kSPECIES][kMAXPARTICLES] ;
838
53ab54c8 839// const Int_t kMAXPARTICLES = 2000 ;
840// if (nparticles >= kMAXPARTICLES)
351dd634 841// AliError("Change size of MAXPARTICLES") ;
53ab54c8 842// Double_t stof[kSPECIES][kMAXPARTICLES] ;
53ab54c8 843
7fb46731 844
845 // make the normalized distribution of pid for this event
846 // w(pid) in the Bayesian formulation
847// for(index = 0 ; index < nparticles ; index ++) {
848
849// cout<<">>>>>>>>>>>>>>>Bayes Index "<<index<<endl;
850
851
852// AliPHOSEmcRecPoint * emc = AliPHOSGetter::Instance()->EmcRecPoint(index) ;
853// AliPHOSCpvRecPoint * cpv = AliPHOSGetter::Instance()->CpvRecPoint(index) ;
854
855 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
856 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
857 TClonesArray * trackSegments = gime->TrackSegments() ;
858 if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
859 AliFatal("RecPoints or TrackSegments not found !") ;
860 }
861 TIter next(trackSegments) ;
862 AliPHOSTrackSegment * ts ;
863 Int_t index = 0 ;
864
35adb638 865 Double_t * stof[kSPECIES] ;
866 Double_t * sdp [kSPECIES] ;
867 Double_t * scpv[kSPECIES] ;
868
869 //Info("MakePID","Begin MakePID");
870
871 for (Int_t i =0; i< kSPECIES; i++){
872 stof[i] = new Double_t[nparticles] ;
873 sdp [i] = new Double_t[nparticles] ;
874 scpv[i] = new Double_t[nparticles] ;
875 }
876
7fb46731 877
878 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
879
880 //cout<<">>>>>> Bayesian Index "<<index<<endl;
881
882 AliPHOSEmcRecPoint * emc = 0 ;
883 if(ts->GetEmcIndex()>=0)
884 emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
885
886 AliPHOSCpvRecPoint * cpv = 0 ;
887 if(ts->GetCpvIndex()>=0)
888 cpv = (AliPHOSCpvRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
cc1fe362 889
7fb46731 890// Int_t track = 0 ;
891// track = ts->GetTrackIndex() ; //TPC tracks ?
cc1fe362 892
7fb46731 893 if (!emc) {
894 AliFatal(Form("-> emc(%d) = %d", ts->GetEmcIndex(), emc )) ;
895 }
c947e71a 896
7fb46731 897 // ############Tof#############################
c947e71a 898
7fb46731 899 // Info("MakePID", "TOF");
900 Float_t en = emc->GetEnergy();
901 Double_t time = emc->GetTime() ;
902 // cout<<">>>>>>>Energy "<<en<<"Time "<<time<<endl;
903 //Conversion Electrons initial population. TO BE REMOVED
304864ab 904 fInitPID[AliPID::kEleCon] = 0. ;
7fb46731 905
cc1fe362 906
35adb638 907 // now get the signals probability
908 // s(pid) in the Bayesian formulation
cc1fe362 909
304864ab 910 stof[AliPID::kPhoton][index] = 1.;
911 stof[AliPID::kElectron][index] = 1.;
304864ab 912 stof[AliPID::kEleCon][index] = 1.;
7fb46731 913 //We assing the same prob to charged hadrons, sum is 1
914 stof[AliPID::kPion][index] = 1./3.;
915 stof[AliPID::kKaon][index] = 1./3.;
916 stof[AliPID::kProton][index] = 1./3.;
917 //We assing the same prob to neutral hadrons, sum is 1
918 stof[AliPID::kNeutron][index] = 1./2.;
919 stof[AliPID::kKaon0][index] = 1./2.;
920
304864ab 921 stof[AliPID::kMuon][index] = 1.;
7fb46731 922
c947e71a 923
35adb638 924 if(en < 2.) {
7fb46731 925
926 Double_t pTofPion = fTFpiong ->Eval(time) ; //gaus distribution
927 Double_t pTofKaon = 0;
928
35adb638 929 if(time < fTkaonl[1])
7fb46731 930 pTofKaon = fTFkaong ->Eval(time) ; //gaus distribution
35adb638 931 else
7fb46731 932 pTofKaon = fTFkaonl ->Eval(time) ; //landau distribution
933
934 Double_t pTofNucleon = 0;
935
35adb638 936 if(time < fThhadronl[1])
7fb46731 937 pTofNucleon = fTFhhadrong ->Eval(time) ; //gaus distribution
35adb638 938 else
7fb46731 939 pTofNucleon = fTFhhadronl ->Eval(time) ; //landau distribution
940 //We assing the same prob to charged hadrons, sum is the average prob
941 Double_t pTofNeHadron = (pTofPion + pTofKaon + pTofNucleon)/2. ;
942 //We assing the same prob to neutral hadrons, sum is the average prob
943 Double_t pTofChHadron = (pTofKaon + pTofNucleon)/3. ;
944
945 stof[AliPID::kPhoton][index] = fTFphoton ->Eval(time) ; //gaus distribution
946 stof[AliPID::kEleCon][index] = stof[AliPID::kPhoton][index] ; // a conversion electron has the photon ToF
304864ab 947 stof[AliPID::kMuon][index] = stof[AliPID::kPhoton][index] ;
7fb46731 948
949 stof[AliPID::kElectron][index] = pTofPion ;
950
951 stof[AliPID::kPion][index] = pTofChHadron ;
952 stof[AliPID::kKaon][index] = pTofChHadron ;
953 stof[AliPID::kProton][index] = pTofChHadron ;
954
955 stof[AliPID::kKaon0][index] = pTofNeHadron ;
956 stof[AliPID::kNeutron][index] = pTofNeHadron ;
cc1fe362 957 }
c947e71a 958
959 // Info("MakePID", "Dispersion");
cc1fe362 960
7fb46731 961 // ###########Shower shape: Dispersion####################
35adb638 962 Float_t dispersion = emc->GetDispersion();
963 //dispersion is not well defined if the cluster is only in few crystals
cc1fe362 964
304864ab 965 sdp[AliPID::kPhoton][index] = 1. ;
966 sdp[AliPID::kElectron][index] = 1. ;
967 sdp[AliPID::kPion][index] = 1. ;
968 sdp[AliPID::kKaon][index] = 1. ;
969 sdp[AliPID::kProton][index] = 1. ;
970 sdp[AliPID::kNeutron][index] = 1. ;
971 sdp[AliPID::kEleCon][index] = 1. ;
972 sdp[AliPID::kKaon0][index] = 1. ;
973 sdp[AliPID::kMuon][index] = 1. ;
c947e71a 974
975 if(en > 0.5 && emc->GetMultiplicity() > 3){
7fb46731 976 sdp[AliPID::kPhoton][index] = GausF(en , dispersion, fDphoton) ;
304864ab 977 sdp[AliPID::kElectron][index] = sdp[AliPID::kPhoton][index] ;
978 sdp[AliPID::kPion][index] = LandauF(en , dispersion, fDhadron ) ;
979 sdp[AliPID::kKaon][index] = sdp[AliPID::kPion][index] ;
980 sdp[AliPID::kProton][index] = sdp[AliPID::kPion][index] ;
981 sdp[AliPID::kNeutron][index] = sdp[AliPID::kPion][index] ;
982 sdp[AliPID::kEleCon][index] = sdp[AliPID::kPhoton][index];
983 sdp[AliPID::kKaon0][index] = sdp[AliPID::kPion][index] ;
984 sdp[AliPID::kMuon][index] = fDFmuon ->Eval(dispersion) ; //landau distribution
35adb638 985 }
cc1fe362 986
7fb46731 987// Info("MakePID","multiplicity %d, dispersion %f", emc->GetMultiplicity(), dispersion);
988// Info("MakePID","ss: photon %f, hadron %f ", sdp[AliPID::kPhoton][index], sdp[AliPID::kPion][index]);
c947e71a 989// cout<<">>>>>multiplicity "<<emc->GetMultiplicity()<<", dispersion "<< dispersion<<endl ;
304864ab 990// cout<<"<<<<<ss: photon "<<sdp[AliPID::kPhoton][index]<<", hadron "<<sdp[AliPID::kPion][index]<<endl;
c947e71a 991
7fb46731 992 //########## CPV-EMC Distance#######################
993 // Info("MakePID", "Distance");
c947e71a 994 // Float_t distance = GetDistance(emc, cpv, "R") ;
7fb46731 995 Float_t x = TMath::Abs(GetDistance(emc, cpv, "X")) ;
996 Float_t z = GetDistance(emc, cpv, "Z") ;
35adb638 997 // Info("MakePID", "Distance %f", distance);
7fb46731 998 Double_t pcpv = 0 ;
c947e71a 999 Double_t pcpvneutral = 0. ;
7fb46731 1000
1001 Double_t elprobx = GausF(en , x, fXelectron) ;
1002 Double_t elprobz = GausF(en , z, fZelectron) ;
1003 Double_t chprobx = GausF(en , x, fXcharged) ;
1004 Double_t chprobz = GausF(en , z, fZcharged) ;
c947e71a 1005 Double_t pcpvelectron = elprobx * elprobz;
1006 Double_t pcpvcharged = chprobx * chprobz;
7fb46731 1007
1008// cout<<">>>>energy "<<en<<endl;
c947e71a 1009// cout<<">>>>electron : x "<<x<<" xprob "<<elprobx<<" z "<<z<<" zprob "<<elprobz<<endl;
1010// cout<<">>>>hadron : x "<<x<<" xprob "<<chprobx<<" z "<<z<<" zprob "<<chprobz<<endl;
1011// cout<<">>>>electron : px*pz "<<pcpvelectron <<" hadron: px*pz "<<pcpvcharged<<endl;
1012
7fb46731 1013 // Is neutral or charged
35adb638 1014 if(pcpvelectron >= pcpvcharged)
1015 pcpv = pcpvelectron ;
1016 else
1017 pcpv = pcpvcharged ;
1018
c947e71a 1019 if(pcpv < 1e-7)
35adb638 1020 {
1021 pcpvneutral = 1. ;
1022 pcpvcharged = 0. ;
1023 pcpvelectron = 0. ;
1024 }
c947e71a 1025 // else
1026 // cout<<">>>>>>>>>>>CHARGED>>>>>>>>>>>"<<endl;
35adb638 1027
304864ab 1028 scpv[AliPID::kPion][index] = pcpvcharged ;
1029 scpv[AliPID::kKaon][index] = pcpvcharged ;
1030 scpv[AliPID::kProton][index] = pcpvcharged ;
7fb46731 1031
1032 scpv[AliPID::kMuon][index] = pcpvelectron ;
304864ab 1033 scpv[AliPID::kElectron][index] = pcpvelectron ;
304864ab 1034 scpv[AliPID::kEleCon][index] = pcpvelectron ;
7fb46731 1035
1036 scpv[AliPID::kPhoton][index] = pcpvneutral ;
1037 scpv[AliPID::kNeutron][index] = pcpvneutral ;
304864ab 1038 scpv[AliPID::kKaon0][index] = pcpvneutral ;
7fb46731 1039
35adb638 1040
1041 // Info("MakePID", "CPV passed");
c947e71a 1042
7fb46731 1043 //############## Pi0 #############################
304864ab 1044 stof[AliPID::kPi0][index] = 0. ;
1045 scpv[AliPID::kPi0][index] = 0. ;
1046 sdp [AliPID::kPi0][index] = 0. ;
c947e71a 1047
35adb638 1048 if(en > 30.){
1049 // pi0 are detected via decay photon
304864ab 1050 stof[AliPID::kPi0][index] = fTFphoton ->Eval(time) ;
1051 scpv[AliPID::kPi0][index] = pcpvneutral ;
1052 sdp [AliPID::kPi0][index] = 1. ;
c947e71a 1053 if(emc->GetMultiplicity() > 3)
304864ab 1054 sdp [AliPID::kPi0][index] = GausPol2(en , dispersion, fDpi0) ;
35adb638 1055 }
1056
7fb46731 1057
1058 //############## muon #############################
1059
35adb638 1060 if(en > 0.5){
1061 //Muons deposit few energy
304864ab 1062 scpv[AliPID::kMuon][index] = 0 ;
1063 stof[AliPID::kMuon][index] = 0 ;
1064 sdp [AliPID::kMuon][index] = 0 ;
c947e71a 1065 }
1066
7fb46731 1067// if(en > 0.5){
1068// cout<<"######################################################"<<endl;
1069// //cout<<"MakePID: energy "<<en<<", tof "<<time<<", distance "<<distance<<", dispersion "<<dispersion<<endl ;
1070// cout<<"MakePID: energy "<<en<<", tof "<<time<<", dispersion "<<dispersion<<", x "<<x<<", z "<<z<<endl ;
1071// cout<<">>>>>multiplicity "<<emc->GetMultiplicity()<<endl;
1072// cout<<">>>>electron : xprob "<<elprobx<<" zprob "<<elprobz<<endl;
1073// cout<<">>>>hadron : xprob "<<chprobx<<" zprob "<<chprobz<<endl;
1074// cout<<">>>>electron : px*pz "<<pcpvelectron <<" hadron: px*pz "<<pcpvcharged<<endl;
c947e71a 1075
7fb46731 1076// cout<<"Photon , pid "<< fInitPID[AliPID::kPhoton]<<" tof "<<stof[AliPID::kPhoton][index]
1077// <<", cpv "<<scpv[AliPID::kPhoton][index]<<", ss "<<sdp[AliPID::kPhoton][index]<<endl;
1078// cout<<"EleCon , pid "<< fInitPID[AliPID::kEleCon]<<", tof "<<stof[AliPID::kEleCon][index]
1079// <<", cpv "<<scpv[AliPID::kEleCon][index]<<" ss "<<sdp[AliPID::kEleCon][index]<<endl;
1080// cout<<"Electron , pid "<< fInitPID[AliPID::kElectron]<<", tof "<<stof[AliPID::kElectron][index]
1081// <<", cpv "<<scpv[AliPID::kElectron][index]<<" ss "<<sdp[AliPID::kElectron][index]<<endl;
1082// cout<<"Muon , pid "<< fInitPID[AliPID::kMuon]<<", tof "<<stof[AliPID::kMuon][index]
1083// <<", cpv "<<scpv[AliPID::kMuon][index]<<" ss "<<sdp[AliPID::kMuon][index]<<endl;
1084// cout<<"Pi0 , pid "<< fInitPID[AliPID::kPi0]<<", tof "<<stof[AliPID::kPi0][index]
1085// <<", cpv "<<scpv[AliPID::kPi0][index]<<" ss "<<sdp[AliPID::kPi0][index]<<endl;
1086// cout<<"Pion , pid "<< fInitPID[AliPID::kPion]<<", tof "<<stof[AliPID::kPion][index]
1087// <<", cpv "<<scpv[AliPID::kPion][index]<<" ss "<<sdp[AliPID::kPion][index]<<endl;
1088// cout<<"Kaon0 , pid "<< fInitPID[AliPID::kKaon0]<<", tof "<<stof[AliPID::kKaon0][index]
1089// <<", cpv "<<scpv[AliPID::kKaon0][index]<<" ss "<<sdp[AliPID::kKaon0][index]<<endl;
1090// cout<<"Kaon , pid "<< fInitPID[AliPID::kKaon]<<", tof "<<stof[AliPID::kKaon][index]
1091// <<", cpv "<<scpv[AliPID::kKaon][index]<<" ss "<<sdp[AliPID::kKaon][index]<<endl;
1092// cout<<"Neutron , pid "<< fInitPID[AliPID::kNeutron]<<", tof "<<stof[AliPID::kNeutron][index]
1093// <<", cpv "<<scpv[AliPID::kNeutron][index]<<" ss "<<sdp[AliPID::kNeutron][index]<<endl;
1094// cout<<"Proton , pid "<< fInitPID[AliPID::kProton]<<", tof "<<stof[AliPID::kProton][index]
1095// <<", cpv "<<scpv[AliPID::kProton][index]<<" ss "<<sdp[AliPID::kProton][index]<<endl;
1096// cout<<"######################################################"<<endl;
1097// }
1098 index++;
cc1fe362 1099 }
35adb638 1100
1101 //for (index = 0 ; index < kSPECIES ; index++)
1102 // pid[index] /= nparticles ;
1103
7fb46731 1104
35adb638 1105 // Info("MakePID", "Total Probability calculation");
1106
cc1fe362 1107 for(index = 0 ; index < nparticles ; index ++) {
1108 // calculates the Bayesian weight
7fb46731 1109
cc1fe362 1110 Int_t jndex ;
1111 Double_t wn = 0.0 ;
1112 for (jndex = 0 ; jndex < kSPECIES ; jndex++)
35adb638 1113 wn += stof[jndex][index] * sdp[jndex][index] * scpv[jndex][index] * fInitPID[jndex] ;
7fb46731 1114
1115 // cout<<"*************wn "<<wn<<endl;
1116 AliPHOSRecParticle * recpar = gime->RecParticle(index) ;
e74ea0e9 1117 if (TMath::Abs(wn)>0)
1118 for (jndex = 0 ; jndex < kSPECIES ; jndex++) {
35adb638 1119 //cout<<"jndex "<<jndex<<" wn "<<wn<<" SetPID * wn"
1120 //<<stof[jndex][index] * sdp[jndex][index] * pid[jndex] << endl;
1121 //cout<<" tof "<<stof[jndex][index] << " disp " <<sdp[jndex][index] << " pid "<< fInitPID[jndex] << endl;
7fb46731 1122// cout<<"Particle "<<jndex<<" final prob * wn "
1123// <<stof[jndex][index] * sdp[jndex][index] * scpv[jndex][index] * fInitPID[jndex] <<" wn "<< wn<<endl;
35adb638 1124 recpar->SetPID(jndex, stof[jndex][index] * sdp[jndex][index] *
1125 scpv[jndex][index] * fInitPID[jndex] / wn) ;
1126// cout<<"final prob "<<stof[jndex][index] * sdp[jndex][index] * scpv[jndex][index] * fInitPID[jndex] / wn<<endl;
1127 //recpar->SetPID(jndex, stof[jndex][index] * fInitPID[jndex] / wn) ;
1128 //cout<<"After SetPID"<<endl;
1129 //recpar->Print();
e74ea0e9 1130 }
2cc71c1e 1131 }
35adb638 1132 // Info("MakePID", "Delete");
1133
acb5beb7 1134 for (Int_t i =0; i< kSPECIES; i++){
1135 delete [] stof[i];
1136 delete [] sdp[i];
1137 delete [] scpv[i];
1138 }
35adb638 1139 // Info("MakePID","End MakePID");
2cc71c1e 1140}
1141
1142//____________________________________________________________________________
e3817e5f 1143void AliPHOSPIDv1::MakeRecParticles()
1144{
b2a60966 1145 // Makes a RecParticle out of a TrackSegment
148b2bba 1146
88cb7938 1147 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
fbf811ec 1148 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
1149 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
1150 TClonesArray * trackSegments = gime->TrackSegments() ;
148b2bba 1151 if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
351dd634 1152 AliFatal("RecPoints or TrackSegments not found !") ;
148b2bba 1153 }
fbf811ec 1154 TClonesArray * recParticles = gime->RecParticles() ;
01a599c9 1155 recParticles->Clear();
148b2bba 1156
7b7c1533 1157 TIter next(trackSegments) ;
7acf6008 1158 AliPHOSTrackSegment * ts ;
6ad0bfa0 1159 Int_t index = 0 ;
09fc14a0 1160 AliPHOSRecParticle * rp ;
7acf6008 1161 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
7fb46731 1162 // cout<<">>>>>>>>>>>>>>>PCA Index "<<index<<endl;
7b7c1533 1163 new( (*recParticles)[index] ) AliPHOSRecParticle() ;
1164 rp = (AliPHOSRecParticle *)recParticles->At(index) ;
f0a4c9e9 1165 rp->SetTrackSegment(index) ;
9688c1dd 1166 rp->SetIndexInList(index) ;
148b2bba 1167
7acf6008 1168 AliPHOSEmcRecPoint * emc = 0 ;
1169 if(ts->GetEmcIndex()>=0)
7b7c1533 1170 emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
fad3e5b9 1171
8d4608b5 1172 AliPHOSCpvRecPoint * cpv = 0 ;
7acf6008 1173 if(ts->GetCpvIndex()>=0)
8d4608b5 1174 cpv = (AliPHOSCpvRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
fad3e5b9 1175
bd76890a 1176 Int_t track = 0 ;
1177 track = ts->GetTrackIndex() ;
1178
148b2bba 1179 // Now set type (reconstructed) of the particle
1180
1181 // Choose the cluster energy range
9fa5f1d0 1182
fbf811ec 1183 if (!emc) {
351dd634 1184 AliFatal(Form("-> emc(%d) = %d", ts->GetEmcIndex(), emc )) ;
fbf811ec 1185 }
50739f15 1186
e3817e5f 1187 Float_t e = emc->GetEnergy() ;
bc0c084c 1188
6f969528 1189 Float_t lambda[2] ;
1190 emc->GetElipsAxis(lambda) ;
50739f15 1191
1192 if((lambda[0]>0.01) && (lambda[1]>0.01)){
1193 // Looking PCA. Define and calculate the data (X),
bc0c084c 1194 // introduce in the function X2P that gives the components (P).
1195
c947e71a 1196 Float_t spher = 0. ;
1197 Float_t emaxdtotal = 0. ;
50739f15 1198
bc0c084c 1199 if((lambda[0]+lambda[1])!=0)
c947e71a 1200 spher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
50739f15 1201
c947e71a 1202 emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
50739f15 1203
1204 fX[0] = lambda[0] ;
1205 fX[1] = lambda[1] ;
1206 fX[2] = emc->GetDispersion() ;
c947e71a 1207 fX[3] = spher ;
50739f15 1208 fX[4] = emc->GetMultiplicity() ;
c947e71a 1209 fX[5] = emaxdtotal ;
50739f15 1210 fX[6] = emc->GetCoreEnergy() ;
1211
e3817e5f 1212 fPrincipalPhoton->X2P(fX,fPPhoton);
1213 fPrincipalPi0 ->X2P(fX,fPPi0);
1f0e7ccd 1214
50739f15 1215 }
1216 else{
e3817e5f 1217 fPPhoton[0]=-100.0; //We do not accept clusters with
1218 fPPhoton[1]=-100.0; //one cell as a photon-like
1219 fPPi0[0] =-100.0;
1220 fPPi0[1] =-100.0;
50739f15 1221 }
1222
2cc71c1e 1223 Float_t time = emc->GetTime() ;
1224 rp->SetTof(time) ;
9fa5f1d0 1225
bc0c084c 1226 // Loop of Efficiency-Purity (the 3 points of purity or efficiency
1227 // are taken into account to set the particle identification)
e3817e5f 1228 for(Int_t effPur = 0; effPur < 3 ; effPur++){
50739f15 1229
bc0c084c 1230 // Looking at the CPV detector. If RCPV greater than CpvEmcDistance,
1231 // 1st,2nd or 3rd bit (depending on the efficiency-purity point )
1232 // is set to 1
35adb638 1233 if(GetCPVBit(emc, cpv, effPur,e) == 1 ){
e3817e5f 1234 rp->SetPIDBit(effPur) ;
35adb638 1235 //cout<<"CPV bit "<<effPur<<endl;
1236 }
50739f15 1237 // Looking the TOF. If TOF smaller than gate, 4th, 5th or 6th
1238 // bit (depending on the efficiency-purity point )is set to 1
2cc71c1e 1239 if(time< (*fParameters)(3,effPur))
e3817e5f 1240 rp->SetPIDBit(effPur+3) ;
2cc71c1e 1241
e3817e5f 1242 //Photon PCA
50739f15 1243 //If we are inside the ellipse, 7th, 8th or 9th
1244 // bit (depending on the efficiency-purity point )is set to 1
e3817e5f 1245 if(GetPrincipalBit("photon",fPPhoton,effPur,e) == 1)
1246 rp->SetPIDBit(effPur+6) ;
1f0e7ccd 1247
e3817e5f 1248 //Pi0 PCA
1f0e7ccd 1249 //If we are inside the ellipse, 10th, 11th or 12th
1250 // bit (depending on the efficiency-purity point )is set to 1
e3817e5f 1251 if(GetPrincipalBit("pi0" ,fPPi0 ,effPur,e) == 1)
1252 rp->SetPIDBit(effPur+9) ;
f0a4c9e9 1253 }
e3817e5f 1254 if(GetHardPhotonBit(emc))
1255 rp->SetPIDBit(12) ;
1256 if(GetHardPi0Bit (emc))
1257 rp->SetPIDBit(13) ;
1f0e7ccd 1258
bd76890a 1259 if(track >= 0)
1260 rp->SetPIDBit(14) ;
1261
9fa5f1d0 1262 //Set momentum, energy and other parameters
50739f15 1263 Float_t encal = GetCalibratedEnergy(e);
9fa5f1d0 1264 TVector3 dir = GetMomentumDirection(emc,cpv) ;
1265 dir.SetMag(encal) ;
1266 rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),encal) ;
1267 rp->SetCalcMass(0);
e0ed2e49 1268 rp->Name(); //If photon sets the particle pdg name to gamma
e747b8da 1269 rp->SetProductionVertex(0,0,0,0);
1270 rp->SetFirstMother(-1);
1271 rp->SetLastMother(-1);
1272 rp->SetFirstDaughter(-1);
1273 rp->SetLastDaughter(-1);
1274 rp->SetPolarisation(0,0,0);
d956e9b7 1275 //Set the position in global coordinate system from the RecPoint
1276 AliPHOSGeometry * geom = gime->PHOSGeometry() ;
1277 AliPHOSTrackSegment * ts = gime->TrackSegment(rp->GetPHOSTSIndex()) ;
1278 AliPHOSEmcRecPoint * erp = gime->EmcRecPoint(ts->GetEmcIndex()) ;
1279 TVector3 pos ;
1280 geom->GetGlobal(erp, pos) ;
1281 rp->SetPos(pos);
6ad0bfa0 1282 index++ ;
1283 }
6ad0bfa0 1284}
e3817e5f 1285
09fc14a0 1286//____________________________________________________________________________
88cb7938 1287void AliPHOSPIDv1::Print() const
09fc14a0 1288{
b2a60966 1289 // Print the parameters used for the particle type identification
bc0c084c 1290
351dd634 1291 AliInfo("=============== AliPHOSPIDv1 ================") ;
88cb7938 1292 printf("Making PID\n") ;
1293 printf(" Pricipal analysis file from 0.5 to 100 %s\n", fFileNamePrincipalPhoton.Data() ) ;
1294 printf(" Name of parameters file %s\n", fFileNameParameters.Data() ) ;
1295 printf(" Matrix of Parameters: 14x4\n") ;
1296 printf(" Energy Calibration 1x3 [3 parametres to calibrate energy: A + B* E + C * E^2]\n") ;
1297 printf(" RCPV 2x3 rows x and z, columns function cut parameters\n") ;
1298 printf(" TOF 1x3 [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]\n") ;
1299 printf(" PCA 5x4 [5 ellipse parametres and 4 parametres to calculate them: A/Sqrt(E) + B* E + C * E^2 + D]\n") ;
1300 Printf(" Pi0 PCA 5x3 [5 ellipse parametres and 3 parametres to calculate them: A + B* E + C * E^2]\n") ;
50739f15 1301 fParameters->Print() ;
09fc14a0 1302}
1303
8d0f3f77 1304
69183710 1305
7acf6008 1306//____________________________________________________________________________
a4e98857 1307void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
1308{
dd5c4038 1309 // Print table of reconstructed particles
1310
88cb7938 1311 AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
bf8f1fbd 1312
88cb7938 1313 TClonesArray * recParticles = gime->RecParticles() ;
21cd0c07 1314
1315 TString message ;
3bf72d32 1316 message = "\nevent " ;
1317 message += gAlice->GetEvNumber() ;
1318 message += " found " ;
1319 message += recParticles->GetEntriesFast();
1320 message += " RecParticles\n" ;
1321
7acf6008 1322 if(strstr(option,"all")) { // printing found TS
3bf72d32 1323 message += "\n PARTICLE Index \n" ;
7acf6008 1324
1325 Int_t index ;
7b7c1533 1326 for (index = 0 ; index < recParticles->GetEntries() ; index++) {
21cd0c07 1327 AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
3bf72d32 1328 message += "\n" ;
1329 message += rp->Name().Data() ;
1330 message += " " ;
1331 message += rp->GetIndexInList() ;
1332 message += " " ;
1333 message += rp->GetType() ;
7acf6008 1334 }
3bf72d32 1335 }
351dd634 1336 AliInfo(message.Data() ) ;
69183710 1337}
88cb7938 1338
1339//____________________________________________________________________________
1340void AliPHOSPIDv1::SetParameters()
1341{
1342 // PCA : To do the Principal Components Analysis it is necessary
1343 // the Principal file, which is opened here
1344 fX = new double[7]; // Data for the PCA
1345 fPPhoton = new double[7]; // Eigenvalues of the PCA
1346 fPPi0 = new double[7]; // Eigenvalues of the Pi0 PCA
1347
1348 // Read photon principals from the photon file
1349
1350 fFileNamePrincipalPhoton = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
1351 TFile f( fFileNamePrincipalPhoton.Data(), "read" ) ;
1352 fPrincipalPhoton = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
1353 f.Close() ;
1354
1355 // Read pi0 principals from the pi0 file
1356
1357 fFileNamePrincipalPi0 = "$ALICE_ROOT/PHOS/PCA_pi0_40-120.root" ;
1358 TFile fPi0( fFileNamePrincipalPi0.Data(), "read" ) ;
1359 fPrincipalPi0 = dynamic_cast<TPrincipal*> (fPi0.Get("principal")) ;
1360 fPi0.Close() ;
1361
1362 // Open parameters file and initialization of the Parameters matrix.
1363 // In the File Parameters.dat are all the parameters. These are introduced
1364 // in a matrix of 16x4
1365 //
1366 // All the parameters defined in this file are, in order of row:
1367 // line 0 : calibration
1368 // lines 1,2 : CPV rectangular cat for X and Z
1369 // line 3 : TOF cut
1370 // lines 4-8 : parameters to calculate photon PCA ellipse
1371 // lines 9-13: parameters to calculate pi0 PCA ellipse
1372 // lines 14-15: parameters to calculate border for high-pt photons and pi0
1373
1374 fFileNameParameters = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters.dat");
1375 fParameters = new TMatrix(16,4) ;
c947e71a 1376 const Int_t kMaxLeng=255;
1377 char string[kMaxLeng];
88cb7938 1378
1379 // Open a text file with PID parameters
1380 FILE *fd = fopen(fFileNameParameters.Data(),"r");
1381 if (!fd)
351dd634 1382 AliFatal(Form("File %s with a PID parameters cannot be opened\n",
1383 fFileNameParameters.Data()));
88cb7938 1384
1385 Int_t i=0;
1386 // Read parameter file line-by-line and skip empty line and comments
c947e71a 1387 while (fgets(string,kMaxLeng,fd) != NULL) {
88cb7938 1388 if (string[0] == '\n' ) continue;
1389 if (string[0] == '!' ) continue;
1390 sscanf(string, "%f %f %f %f",
1391 &(*fParameters)(i,0), &(*fParameters)(i,1),
1392 &(*fParameters)(i,2), &(*fParameters)(i,3));
1393 i++;
351dd634 1394 AliDebug(1, Form("SetParameters", "line %d: %s",i,string));
88cb7938 1395 }
1396 fclose(fd);
1397}
1398
1399//____________________________________________________________________________
1400void AliPHOSPIDv1::SetParameterCalibration(Int_t i,Float_t param)
1401{
1402 // Set parameter "Calibration" i to a value param
351dd634 1403 if(i>2 || i<0) {
1404 AliError(Form("Invalid parameter number: %d",i));
1405 } else
88cb7938 1406 (*fParameters)(0,i) = param ;
1407}
1408
1409//____________________________________________________________________________
1410void AliPHOSPIDv1::SetParameterCpv2Emc(Int_t i, TString axis, Float_t cut)
1411{
1412 // Set the parameters to calculate Cpv-to-Emc Distance Cut depending on
1413 // Purity-Efficiency point i
1414
351dd634 1415 if(i>2 || i<0) {
1416 AliError(Form("Invalid parameter number: %d",i));
1417 } else {
88cb7938 1418 axis.ToLower();
1419 if (axis == "x") (*fParameters)(1,i) = cut;
1420 else if (axis == "z") (*fParameters)(2,i) = cut;
351dd634 1421 else {
1422 AliError(Form("Invalid axis name: %s",axis.Data()));
1423 }
88cb7938 1424 }
1425}
1426
1427//____________________________________________________________________________
1428void AliPHOSPIDv1::SetParameterPhotonBoundary(Int_t i,Float_t param)
1429{
1430 // Set parameter "Hard photon boundary" i to a value param
351dd634 1431 if(i>4 || i<0) {
1432 AliError(Form("Invalid parameter number: %d",i));
1433 } else
88cb7938 1434 (*fParameters)(14,i) = param ;
1435}
1436
1437//____________________________________________________________________________
1438void AliPHOSPIDv1::SetParameterPi0Boundary(Int_t i,Float_t param)
1439{
1440 // Set parameter "Hard pi0 boundary" i to a value param
351dd634 1441 if(i>1 || i<0) {
1442 AliError(Form("Invalid parameter number: %d",i));
1443 } else
88cb7938 1444 (*fParameters)(15,i) = param ;
1445}
1446
1447//_____________________________________________________________________________
1448void AliPHOSPIDv1::SetParameterTimeGate(Int_t i, Float_t gate)
1449{
1450 // Set the parameter TimeGate depending on Purity-Efficiency point i
351dd634 1451 if (i>2 || i<0) {
1452 AliError(Form("Invalid Efficiency-Purity choice %d",i));
1453 } else
88cb7938 1454 (*fParameters)(3,i)= gate ;
1455}
1456
1457//_____________________________________________________________________________
1458void AliPHOSPIDv1::SetParameterToCalculateEllipse(TString particle, TString param, Int_t i, Float_t par)
1459{
1460 // Set the parameter "i" that is needed to calculate the ellipse
1461 // parameter "param" for a particle "particle"
1462
1463 particle.ToLower();
1464 param. ToLower();
1465 Int_t p= -1;
1466 Int_t offset=0;
1467
1468 if (particle == "photon") offset=0;
1469 else if (particle == "pi0") offset=5;
1470 else
351dd634 1471 AliError(Form("Wrong particle name: %s (choose from pi0/photon)\n",
1472 particle.Data()));
88cb7938 1473
1474 if (param.Contains("a")) p=4+offset;
1475 else if(param.Contains("b")) p=5+offset;
1476 else if(param.Contains("c")) p=6+offset;
1477 else if(param.Contains("x0"))p=7+offset;
1478 else if(param.Contains("y0"))p=8+offset;
351dd634 1479 if((i>4)||(i<0)) {
1480 AliError(Form("No parameter with index %d", i)) ;
1481 } else if(p==-1) {
1482 AliError(Form("No parameter with name %s", param.Data() )) ;
1483 } else
88cb7938 1484 (*fParameters)(p,i) = par ;
1485}
1486
1487//____________________________________________________________________________
1488void AliPHOSPIDv1::Unload()
1489{
c947e71a 1490 //Unloads RecPoints, Tracks and RecParticles
88cb7938 1491 AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
1492 gime->PhosLoader()->UnloadRecPoints() ;
1493 gime->PhosLoader()->UnloadTracks() ;
1494 gime->PhosLoader()->UnloadRecParticles() ;
1495}
1496
1497//____________________________________________________________________________
90cceaf6 1498void AliPHOSPIDv1::WriteRecParticles()
88cb7938 1499{
c947e71a 1500 //It writes reconstructed particles and pid to file
1501
88cb7938 1502 AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
1503
1504 TClonesArray * recParticles = gime->RecParticles() ;
1505 recParticles->Expand(recParticles->GetEntriesFast() ) ;
adcca1e6 1506 if(fWrite){
1507 TTree * treeP = gime->TreeP();
1508
1509 //First rp
1510 Int_t bufferSize = 32000 ;
1511 TBranch * rpBranch = treeP->Branch("PHOSRP",&recParticles,bufferSize);
1512 rpBranch->SetTitle(BranchName());
1513
1514 rpBranch->Fill() ;
1515
1516 gime->WriteRecParticles("OVERWRITE");
1517 gime->WritePID("OVERWRITE");
1518 }
88cb7938 1519}
1520
35adb638 1521
1522//_______________________________________________________________________
1523void AliPHOSPIDv1::SetInitPID(const Double_t *p) {
1524 // Sets values for the initial population of each particle type
304864ab 1525 for (Int_t i=0; i<AliPID::kSPECIESN; i++) fInitPID[i] = p[i];
35adb638 1526}
1527//_______________________________________________________________________
1528void AliPHOSPIDv1::GetInitPID(Double_t *p) const {
1529 // Gets values for the initial population of each particle type
304864ab 1530 for (Int_t i=0; i<AliPID::kSPECIESN; i++) p[i] = fInitPID[i];
35adb638 1531}