PID for particles with E < 5 GeV was not done, temporal solution found (Guenole)
[u/mrichter/AliRoot.git] / EMCAL / AliEMCALPID.cxx
CommitLineData
dc293ae9 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17/* History of cvs commits:
18 *
19 * $Log$
4ce73a00 20 * Revision 1.10 2007/03/09 14:34:11 gustavo
21 * Correct probability calculation, added missing initialization of data members
22 *
4cfd8ef9 23 * Revision 1.9 2007/02/20 20:17:43 hristov
24 * Corrected array size, removed warnings (icc)
25 *
d69ab345 26 * Revision 1.8 2006/12/19 08:49:35 gustavo
27 * New PID class for EMCAL, bayesian analysis done with ESD data, PID information filled when calling AliEMCALPID in AliEMCALReconstructor::FillESD()
28 *
dc293ae9 29 *
30 */
31// to compute PID for all the clusters in ESDs.root file
32// the ESDs.root have to be in the same directory as the class
33//
34//
35//
36//
37//
38// AliEMCALPID::CalculPID(Energy,Lambda0)
39// Calcul PID for all clusters in AliESDs.root file
40// keep this function for the moment for a simple verification, could be removed
41//
42//
43//
44// AliEMCALPID::CalculPID(Energy,Lambda0)
45// calcul PID Weght for a cluster with Energy, Lambda0 .
46// Double_t PIDFinal[AliPID::kSPECIESN] is the standard PID for :
47//
48//
49//
50// kElectron : fPIDFinal[0]
51// kMuon : fPIDFinal[1]
52// kPion : fPIDFinal[2]
53// kKaon : fPIDFinal[3]
54// kProton : fPIDFinal[4]
55// kPhoton : fPIDFinal[5]
56// kPi0 : fPIDFinal[6]
57// kNeutron : fPIDFinal[7]
58// kKaon0 : fPIDFinal[8]
59// kEleCon : fPIDFinal[9]
60// kUnknown : fPIDFinal[10]
61//
62//
63// PID[3] is a simple PID for
64// Electron & Photon PID[0]
65// Pi0 PID[1]
66// Hadron PID[2]
67//
68//
69//
70//
71//
72// --- ROOT system ---
73
74// standard C++ includes
75#include <Riostream.h>
76// #include <cstdlib>
77// #include <cmath>
78
79// ROOT includes
80#include "TTree.h"
81#include "TStyle.h"
82#include "TVector3.h"
83#include "TBranch.h"
84#include "TClonesArray.h"
85#include "TCanvas.h"
86#include "TLorentzVector.h"
87#include "TMath.h"
88#include "TFile.h"
89#include "TH1.h"
90#include "TH2.h"
91#include "TParticle.h"
92
93// // STEER includes
94// #include "AliRun.h"
95// #include "AliRunLoader.h"
96// #include "AliHeader.h"
97// #include "AliLoader.h"
98// #include "AliStack.h"
99// #include "AliESDtrack.h"
100// #include "AliESD.h"
101#include "AliLog.h"
102#include "AliEMCALPID.h"
103
104ClassImp(AliEMCALPID)
105
4cfd8ef9 106//______________________________________________
107 AliEMCALPID::AliEMCALPID():
108 fPrintInfo(kFALSE), fProbGamma(0.),fProbPiZero(0.),fProbHadron(0.),fReconstructor(kFALSE)
dc293ae9 109{
4cfd8ef9 110 //
111 // Constructor.
112 // Initialize all constant values which have to be used
113 // during PID algorithm execution
114 //
115
116 // set flag for printing to FALSE by default
117 fPrintInfo = kFALSE;
118
119 // as a first step, all array elements are initialized to 0.0
120 Int_t i, j;
121 for (i = 0; i < 6; i++) {
122 for (j = 0; j < 6; j++) {
123 fGamma[i][j] = fHadron[i][j] = fPiZero5to10[i][j] = fPiZero10to60[i][j] = 0.;
124 }
125 }
126
127 // then, only the ones which must be not zero are initialized
128 // while the others will remain to the value 0.0
129
130 fGamma[0][0] = 0.038022;
131 fGamma[0][1] = -0.0001883;
132 fGamma[0][2] = 5.449e-06;
133
134 fGamma[1][0] = 0.207313;
135 fGamma[1][1] = -0.000978;
136 fGamma[1][2] = 0.00001634;
137
138 fGamma[2][0] = 0.043364;
139 fGamma[2][1] = -0.0002048;
140 fGamma[2][2] = 8.661e-06;
141 fGamma[2][3] = -1.353e-07;
142
143 fGamma[3][0] = 0.265004;
144 fGamma[3][1] = 0.061298;
145 fGamma[3][2] = -0.003203;
146 fGamma[3][3] = 4.73e-05;
147
148 fGamma[4][0] = 0.243579;
149 fGamma[4][1] = -1.614e-05;
150
151 fGamma[5][0] = 0.002942;
152 fGamma[5][1] = -3.976e-05;
153
154 fHadron[0][0] = 0.011945 / 3.;
155 fHadron[0][1] = 0.000386 / 3.;
156 fHadron[0][2] = -0.000014 / 3.;
157 fHadron[0][3] = 1.336e-07 / 3.;
158
159 fHadron[1][0] = 0.496544;
160 fHadron[1][1] = -0.003226;
161 fHadron[1][2] = 0.00001678;
162
163 fHadron[2][0] = 0.144838;
164 fHadron[2][1] = -0.002954;
165 fHadron[2][2] = 0.00008754;
166 fHadron[2][3] = -7.587e-07;
167
168 fHadron[3][0] = 1.264461 / 7.;
169 fHadron[3][1] = 0.002097 / 7.;
170
171 fHadron[4][0] = 0.261950;
172 fHadron[4][1] = -0.001078;
173 fHadron[4][2] = 0.00003237;
174 fHadron[4][3] = -3.241e-07;
175 fHadron[4][4] = 0.;
176 fHadron[4][5] = 0.;
177 fHadron[5][0] = 0.010317;
178 fHadron[5][1] = 0.;
179 fHadron[5][2] = 0.;
180 fHadron[5][3] = 0.;
181 fHadron[5][4] = 0.;
182 fHadron[5][5] = 0.;
183
184 fPiZero5to10[0][0] = 0.009138;
185 fPiZero5to10[0][1] = 0.0006377;
186
187 fPiZero5to10[1][0] = 0.08;
188
189 fPiZero5to10[2][0] = -0.061119;
190 fPiZero5to10[2][1] = 0.019013;
191
192 fPiZero5to10[3][0] = 0.2;
193
194 fPiZero5to10[4][0] = 0.252044;
195 fPiZero5to10[4][1] = -0.002315;
196
197 fPiZero5to10[5][0] = 0.002942;
198 fPiZero5to10[5][1] = -3.976e-05;
199
200 fPiZero10to60[0][0] = 0.009138;
201 fPiZero10to60[0][1] = 0.0006377;
202
203 fPiZero10to60[1][0] = 1.272837;
204 fPiZero10to60[1][1] = -0.069708;
205 fPiZero10to60[1][2] = 0.001568;
206 fPiZero10to60[1][3] = -1.162e-05;
207
208 fPiZero10to60[2][0] = 0.139703;
209 fPiZero10to60[2][1] = 0.003687;
210 fPiZero10to60[2][2] = -0.000568;
211 fPiZero10to60[2][3] = 1.498e-05;
212 fPiZero10to60[2][4] = -1.174e-07;
213
214 fPiZero10to60[3][0] = -0.826367;
215 fPiZero10to60[3][1] = 0.096951;
216 fPiZero10to60[3][2] = -0.002215;
217 fPiZero10to60[3][3] = 2.523e-05;
218
219 fPiZero10to60[4][0] = 0.249890;
220 fPiZero10to60[4][1] = -0.000063;
221
222 fPiZero10to60[5][0] = 0.002942;
223 fPiZero10to60[5][1] = -3.976e-05;
224
225 fPIDWeight[0] = -1;
226 fPIDWeight[1] = -1;
227 fPIDWeight[2] = -1;
228 fReconstructor = kFALSE;
dc293ae9 229}
4cfd8ef9 230
231//______________________________________________
dc293ae9 232void AliEMCALPID::RunPID(AliESD *esd)
233{
234//
235// Make the PID for all the EMCAL clusters containedin the ESDs File
236// but just gamma/PiO/Hadron
237//
238 // trivial check against NULL object passed
4cfd8ef9 239
dc293ae9 240 if (esd == 0x0) {
4ce73a00 241 AliInfo("NULL ESD object passed !!" );
dc293ae9 242 return ;
243 }
4cfd8ef9 244
dc293ae9 245 Int_t nClusters = esd->GetNumberOfEMCALClusters();
246 Int_t firstCluster = esd->GetFirstEMCALCluster();
247 Double_t energy, lambda0;
248 for (Int_t iCluster = firstCluster; iCluster < (nClusters + firstCluster); iCluster++) {
249
250 AliESDCaloCluster *clust = esd->GetCaloCluster(iCluster);
251 energy = clust->GetClusterEnergy();
252 lambda0 = clust->GetM02();
253 // verify cluster type
254 Int_t clusterType= clust->GetClusterType();
4ce73a00 255 if (clusterType == AliESDCaloCluster::kClusterv1 && lambda0 != 0 && energy < 1000) {
256
257
dc293ae9 258 // reject clusters with lambda0 = 0
4ce73a00 259
260
dc293ae9 261 ComputePID(energy, lambda0);
4ce73a00 262
263
dc293ae9 264 if (fPrintInfo) {
265 AliInfo("___________________________________________________");
266 AliInfo(Form( "Particle Energy = %f",energy));
267 AliInfo(Form( "Particle Lambda0 of the particle = %f", lambda0) );
268 AliInfo("PIDWeight of the particle :" );
269 AliInfo(Form( " GAMMA : %f",fPID[0] ));
270 AliInfo(Form( " PiZero : %f",fPID[1] ));
271 AliInfo(Form( " HADRON : %f", fPID[2] ));
272 AliInfo("_________________________________________");
273 AliInfo(Form( " kElectron : %f", fPIDFinal[0]) );
274 AliInfo(Form( " kMuon : %f", fPIDFinal[1] ));
275 AliInfo(Form( " kPion : %f", fPIDFinal[2] ));
276 AliInfo(Form( " kKaon : %f", fPIDFinal[3] ));
277 AliInfo(Form( " kProton : %f", fPIDFinal[4] ));
278 AliInfo(Form( " kPhoton : %f", fPIDFinal[5] ));
279 AliInfo(Form( " kPi0 : %f", fPIDFinal[6] ));
280 AliInfo(Form( " kNeutron : %f", fPIDFinal[7] ));
281 AliInfo(Form( " kKaon0 : %f", fPIDFinal[8] ));
282 AliInfo(Form( " kEleCon : %f", fPIDFinal[9] ));
283 AliInfo(Form( " kUnknown : %f", fPIDFinal[10] ));
284 AliInfo("___________________________________________________");
285 }
4cfd8ef9 286
dc293ae9 287 if(fReconstructor) // In case it is called during reconstruction.
288 clust->SetPid(fPIDFinal);
289 } // end if (clusterType...)
290 } // end for (iCluster...)
291}
4cfd8ef9 292
293//__________________________________________________________
dc293ae9 294void AliEMCALPID::ComputePID(Double_t energy, Double_t lambda0)
295{
296//
297// This is the main command, which uses the distributions computed and parametrised,
298// and gives the PID by the bayesian method.
299//
4ce73a00 300
301if (energy<5){energy =6;}
302
303
4cfd8ef9 304 TArrayD paramDistribGamma = DistLambda0(energy, 1);
305 TArrayD paramDistribPiZero = DistLambda0(energy, 2);
306 TArrayD paramDistribHadron = DistLambda0(energy, 3);
307
308 Bool_t norm = kFALSE;
309
310 fProbGamma = TMath::Gaus(lambda0, paramDistribGamma[1], paramDistribGamma[2], norm) * paramDistribGamma[0];
311 fProbGamma += TMath::Landau(lambda0, paramDistribGamma[4], paramDistribGamma[5], norm) * paramDistribGamma[3];
312 fProbPiZero = TMath::Gaus(lambda0, paramDistribPiZero[1], paramDistribPiZero[2], norm) * paramDistribPiZero[0];
313 fProbPiZero += TMath::Landau(lambda0, paramDistribPiZero[4], paramDistribPiZero[5], norm) * paramDistribPiZero[3];
314 fProbHadron = TMath::Gaus(lambda0, paramDistribHadron[1], paramDistribHadron[2], norm) * paramDistribHadron[0];
315 fProbHadron += TMath::Landau(lambda0, paramDistribHadron[4], paramDistribHadron[5], norm) * paramDistribHadron[3];
316
317 // compute PID Weight
318 fPIDWeight[0] = fProbGamma / (fProbGamma + fProbPiZero + fProbHadron);
319 fPIDWeight[1] = fProbPiZero / (fProbGamma+fProbPiZero+fProbHadron);
320 fPIDWeight[2] = fProbHadron / (fProbGamma+fProbPiZero+fProbHadron);
321
322 SetPID(fPIDWeight[0], 0);
323 SetPID(fPIDWeight[1], 1);
324 SetPID(fPIDWeight[2], 2);
325
326 // sortie ecran pid Weight only for control (= in english ???)
327 if (fPrintInfo) {
328 AliInfo(Form( "Energy in loop = %f", energy) );
329 AliInfo(Form( "Lambda0 in loop = %f", lambda0) );
330 AliInfo(Form( "fProbGamma in loop = %f", fProbGamma) );
331 // AliInfo(Form( "fParametresDistribGamma[2] = %f", fParamDistribGamma[2]) );
332 AliInfo(Form( "fProbaPiZero = %f", fProbPiZero ));
333 AliInfo(Form( "fProbaHadron = %f", fProbHadron) );
334 AliInfo(Form( "PIDWeight in loop = %f ||| %f ||| %f", fPIDWeight[0] , fPIDWeight[1], fPIDWeight[2]) );
335 AliInfo(Form( "fGamma[2][2] = %f", fGamma[2][2] ));
336 AliInfo("********************************************************" );
337 }
338
339 fPIDFinal[0] = fPIDWeight[0]/2;
340 fPIDFinal[1] = fPIDWeight[2]/8;
341 fPIDFinal[2] = fPIDWeight[2]/8;
342 fPIDFinal[3] = fPIDWeight[2]/8;
343 fPIDFinal[4] = fPIDWeight[2]/8;
344 fPIDFinal[5] = fPIDWeight[0]/2;
345 fPIDFinal[6] = fPIDWeight[1] ;
346 fPIDFinal[7] = fPIDWeight[2]/8;
347 fPIDFinal[8] = fPIDWeight[2]/8;
348 fPIDFinal[9] = fPIDWeight[2]/8;
349 fPIDFinal[10] = fPIDWeight[2]/8;
dc293ae9 350}
4cfd8ef9 351
352//________________________________________________________
dc293ae9 353TArrayD AliEMCALPID::DistLambda0(Double_t energy, Int_t type)
354{
4cfd8ef9 355 //
356 // Compute the values of the parametrised distributions using the data initialised before.
357 //
358 Double_t constGauss = 0., meanGauss = 0., sigmaGauss = 0.;
359 Double_t constLandau=0., mpvLandau=0., sigmaLandau=0.;
360 TArrayD distributionParam(6);
361
362 switch (type) {
363 case 1:
364 constGauss = Polynomial(energy, fGamma[0]);
365 meanGauss = Polynomial(energy, fGamma[1]);
366 sigmaGauss = Polynomial(energy, fGamma[2]);
367 constLandau = Polynomial(energy, fGamma[3]);
368 mpvLandau = Polynomial(energy, fGamma[4]);
369 sigmaLandau = Polynomial(energy, fGamma[5]);
370 break;
371 case 2:
372 if (energy < 10) {
373 constGauss = Polynomial(energy, fPiZero5to10[0]);
374 meanGauss = Polynomial(energy, fPiZero5to10[1]);
375 sigmaGauss = Polynomial(energy, fPiZero5to10[2]);
376 constLandau = Polynomial(energy, fPiZero5to10[3]);
377 mpvLandau = Polynomial(energy, fPiZero5to10[4]);
378 sigmaLandau = Polynomial(energy, fPiZero5to10[5]);
379 }
380 else {
381 constGauss = Polynomial(energy, fPiZero10to60[0]);
382 meanGauss = Polynomial(energy, fPiZero10to60[1]);
383 sigmaGauss = Polynomial(energy, fPiZero10to60[2]);
384 constLandau = Polynomial(energy, fPiZero10to60[3]);
385 mpvLandau = Polynomial(energy, fPiZero10to60[4]);
386 sigmaLandau = Polynomial(energy, fPiZero10to60[5]);
387 }
388 break;
389 case 3:
390 constGauss = Polynomial(energy, fHadron[0]);
391 meanGauss = Polynomial(energy, fHadron[1]);
392 sigmaGauss = Polynomial(energy, fHadron[2]);
393 constLandau = Polynomial(energy, fHadron[3]);
394 mpvLandau = Polynomial(energy, fHadron[4]);
395 sigmaLandau = Polynomial(energy, fHadron[5]);
396 break;
397 }
398
399 distributionParam[0] = constGauss;
400 distributionParam[1] = meanGauss;
401 distributionParam[2] = sigmaGauss;
402 distributionParam[3] = constLandau;
403 distributionParam[4] = mpvLandau;
404 distributionParam[5] = sigmaLandau;
405
406 return distributionParam;
dc293ae9 407}
4cfd8ef9 408
409//_______________________________________________________
dc293ae9 410Double_t AliEMCALPID::Polynomial(Double_t x, Double_t *params)
411{
4cfd8ef9 412 //
413 // Compute a polynomial for a given value of 'x'
414 // with the array of parameters passed as the second arg
415 //
416 Double_t y;
417 y = params[0];
418 y += params[1] * x;
419 y += params[2] * x * x;
420 y += params[3] * x * x * x;
421 y += params[4] * x * x * x * x;
422 y += params[5] * x * x * x * x * x;
423
424 return y;
dc293ae9 425}