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