added a data member that decides at which energyto switch from one PCA analysis to...
[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:
26// -Bit 0 to 2: bit set if RCPV > fCpvEmcDistance (each bit corresponds
27// to a different efficiency-purity point of the photon identification)
28// -Bit 3 to 5: bit set if TOF < fTimeGate (each bit corresponds
29// to a different efficiency-purity point of the photon identification)
30// -Bit 6 to 9: bit set if Principal Components are
31// inside an ellipse defined by fX_center, fY_center, fA, fB, fAngle
32// (each bit corresponds to a different efficiency-purity point of the
33// photon identification)
9fa5f1d0 34// A calibrated energy is calculated. The energy of the reconstructed
35// cluster is corrected with the formula A + B * E + C * E^2, whose parameters
36// where obtained thourgh the study of the reconstructed energy
37// distribution of monoenergetic photons.
38//
a4e98857 39//
7acf6008 40//
a4e98857 41// use case:
f0a4c9e9 42// root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root","v1")
a4e98857 43// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
148b2bba 44// // reading headers from file galice1.root and create RecParticles with title v1
45 // TrackSegments and RecPoints with title "v1" are used
7acf6008 46// // set file name for the branch RecParticles
f0a4c9e9 47// root [1] p->ExecuteTask("deb all time")
7acf6008 48// // available options
49// // "deb" - prints # of reconstructed particles
50// // "deb all" - prints # and list of RecParticles
51// // "time" - prints benchmarking results
52//
f0a4c9e9 53// root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1","v0")
148b2bba 54// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
55// // reading headers from file galice1.root and create RecParticles with title v1
56 // RecPoints and TrackSegments with title "v0" are used
f0a4c9e9 57// root [3] p2->ExecuteTask()
58//
59// There are two possible principal files available to do the analysis.
9fa5f1d0 60// One for energy ranges from 0.5 to 5 GeV, and another
61// one from 5 to 100 GeV. This files are automatically called in function
62// of the cluster energy.
f0a4c9e9 63
7acf6008 64//*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
148b2bba 65// Gustavo Conesa April 2002
6ad0bfa0 66
67// --- ROOT system ---
7acf6008 68#include "TROOT.h"
69#include "TTree.h"
70#include "TFile.h"
71#include "TF2.h"
72#include "TFormula.h"
73#include "TCanvas.h"
74#include "TFolder.h"
75#include "TSystem.h"
76#include "TBenchmark.h"
148b2bba 77#include "TMatrixD.h"
78#include "TPrincipal.h"
79#include "TSystem.h"
80
6ad0bfa0 81// --- Standard library ---
82
6f969528 83#include <iostream>
84#include <fstream>
85#include <iomanip>
6ad0bfa0 86
87// --- AliRoot header files ---
88
7acf6008 89#include "AliRun.h"
90#include "AliGenerator.h"
91#include "AliPHOS.h"
26d4b141 92#include "AliPHOSPIDv1.h"
7acf6008 93#include "AliPHOSClusterizerv1.h"
6ad0bfa0 94#include "AliPHOSTrackSegment.h"
7acf6008 95#include "AliPHOSTrackSegmentMakerv1.h"
6ad0bfa0 96#include "AliPHOSRecParticle.h"
7b7c1533 97#include "AliPHOSGeometry.h"
98#include "AliPHOSGetter.h"
6ad0bfa0 99
26d4b141 100ClassImp( AliPHOSPIDv1)
6ad0bfa0 101
1cb7c1ee 102//____________________________________________________________________________
103AliPHOSPIDv1::AliPHOSPIDv1():AliPHOSPID()
104{
a4e98857 105 // default ctor
148b2bba 106
8d0f3f77 107 InitParameters() ;
92f521a9 108 fDefaultInit = kTRUE ;
109
7acf6008 110}
111
112//____________________________________________________________________________
148b2bba 113AliPHOSPIDv1::AliPHOSPIDv1(const char * headerFile,const char * name, const char * from) : AliPHOSPID(headerFile, name)
e0ed2e49 114
115
7acf6008 116{
a4e98857 117 //ctor with the indication on where to look for the track segments
7b7c1533 118
8d0f3f77 119 InitParameters() ;
120
148b2bba 121 if ( from == 0 )
122 fFrom = name ;
123 else
124 fFrom = from ;
8d0f3f77 125
2bd5457f 126 Init() ;
92f521a9 127 fDefaultInit = kFALSE ;
7acf6008 128
129}
7b7c1533 130
7acf6008 131//____________________________________________________________________________
132AliPHOSPIDv1::~AliPHOSPIDv1()
133{
79bb1b62 134 // dtor
92f521a9 135 // fDefaultInit = kTRUE if PID created by default ctor (to get just the parameters)
9fa5f1d0 136
a496c46c 137 delete [] fX ; // Principal input
148b2bba 138 delete [] fP ; // Principal components
6f969528 139// delete fParameters ; // Matrix of Parameters
140// delete fParameters5 ; // Matrix of Parameters
141// delete fParameters100 ; // Matrix of Parameters
9fa5f1d0 142
8d0f3f77 143
92f521a9 144 if (!fDefaultInit) {
145 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
146 // remove the task from the folder list
147 gime->RemoveTask("P",GetName()) ;
148 TString name(GetName()) ;
149 name.ReplaceAll("pid", "clu") ;
150 gime->RemoveTask("C",name) ;
151
152 // remove the data from the folder list
153 name = GetName() ;
154 name.Remove(name.Index(":")) ;
155 gime->RemoveObjects("RE", name) ; // EMCARecPoints
156 gime->RemoveObjects("RC", name) ; // CPVRecPoints
157 gime->RemoveObjects("T", name) ; // TrackSegments
158 gime->RemoveObjects("P", name) ; // RecParticles
159
160 // Delete gAlice
161 gime->CloseFile() ;
162
163 fSplitFile = 0 ;
79bb1b62 164 }
7acf6008 165}
2bd5457f 166
a496c46c 167//____________________________________________________________________________
168const TString AliPHOSPIDv1::BranchName() const
169{
170 TString branchName(GetName() ) ;
171 branchName.Remove(branchName.Index(Version())-1) ;
172 return branchName ;
173}
174
148b2bba 175//____________________________________________________________________________
176void AliPHOSPIDv1::Init()
177{
178 // Make all memory allocations that are not possible in default constructor
179 // Add the PID task to the list of PHOS tasks
a496c46c 180
148b2bba 181 if ( strcmp(GetTitle(), "") == 0 )
182 SetTitle("galice.root") ;
8d0f3f77 183
148b2bba 184 AliPHOSGetter * gime = AliPHOSGetter::GetInstance(GetTitle(), fFrom.Data()) ;
185
a496c46c 186 gime->SetRecParticlesTitle(BranchName()) ;
148b2bba 187 if ( gime == 0 ) {
188 cerr << "ERROR: AliPHOSPIDv1::Init -> Could not obtain the Getter object !" << endl ;
189 return ;
190 }
a496c46c 191
148b2bba 192 gime->PostPID(this) ;
193 // create a folder on the white board //YSAlice/WhiteBoard/RecParticles/PHOS/recparticlesName
a496c46c 194 gime->PostRecParticles(BranchName()) ;
148b2bba 195
196}
8d0f3f77 197
198//____________________________________________________________________________
199void AliPHOSPIDv1::InitParameters()
200{
201 fFrom = "" ;
202 fHeaderFileName = GetTitle() ;
203 TString name(GetName()) ;
204 if (name.IsNull())
205 name = "Default" ;
206 fTrackSegmentsTitle = name ;
207 fRecPointsTitle = name ;
208 fRecParticlesTitle = name ;
209 name.Append(":") ;
210 name.Append(Version()) ;
211 SetName(name) ;
212 fRecParticlesInRun = 0 ;
8d0f3f77 213 fNEvent = 0 ;
214 fClusterizer = 0 ;
215 fTSMaker = 0 ;
216 fRecParticlesInRun = 0 ;
9fa5f1d0 217 SetParameters() ; // fill the parameters matrix from parameters file
8d0f3f77 218}
219
69183710 220//____________________________________________________________________________
9fa5f1d0 221Double_t AliPHOSPIDv1::GetCpvtoEmcDistanceCut(const Float_t Cluster_En, const TString Eff_Pur)
148b2bba 222{
223 // Get CpvtoEmcDistanceCut parameter depending on the cluster energy and
224 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
225 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
226 // EFFICIENCY by PURITY)
148b2bba 227
9fa5f1d0 228 Int_t eff_pur = GetEffPurOption(Eff_Pur);
f0a4c9e9 229
9fa5f1d0 230 GetAnalysisParameters(Cluster_En) ;
231 if((fClusterrcpv!= -1)&&(eff_pur != -1))
232 return (*fParameters)(fClusterrcpv,eff_pur) ;
233 else
234 return 0.0;
148b2bba 235}
236//____________________________________________________________________________
237
9fa5f1d0 238Double_t AliPHOSPIDv1::GetTimeGate(const Float_t Cluster_En, const TString Eff_Pur)
148b2bba 239{
240 // Get TimeGate parameter depending on the cluster energy and
241 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
242 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
243 // EFFICIENCY by PURITY)
9fa5f1d0 244
f0a4c9e9 245 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 246 GetAnalysisParameters(Cluster_En) ;
247
248 if((fCluster!= -1)&&(eff_pur != -1))
249 return (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur) ;
250 else
251 return 0.0;
f0a4c9e9 252
148b2bba 253}
254//_____________________________________________________________________________
7acf6008 255Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * Axis)const
69183710 256{
257 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
148b2bba 258
7b7c1533 259 const AliPHOSGeometry * geom = AliPHOSGetter::GetInstance()->PHOSGeometry() ;
69183710 260 TVector3 vecEmc ;
7acf6008 261 TVector3 vecCpv ;
148b2bba 262 if(cpv){
263 emc->GetLocalPosition(vecEmc) ;
264 cpv->GetLocalPosition(vecCpv) ;
265 if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
266 // Correct to difference in CPV and EMC position due to different distance to center.
267 // we assume, that particle moves from center
268 Float_t dCPV = geom->GetIPtoOuterCoverDistance();
269 Float_t dEMC = geom->GetIPtoCrystalSurface() ;
270 dEMC = dEMC / dCPV ;
271 vecCpv = dEMC * vecCpv - vecEmc ;
272 if (Axis == "X") return vecCpv.X();
273 if (Axis == "Y") return vecCpv.Y();
274 if (Axis == "Z") return vecCpv.Z();
275 if (Axis == "R") return vecCpv.Mag();
7acf6008 276 }
148b2bba 277
278 return 100000000 ;
279 }
7acf6008 280 return 100000000 ;
69183710 281}
282
6ad0bfa0 283//____________________________________________________________________________
9fa5f1d0 284Double_t AliPHOSPIDv1::CalibratedEnergy(Float_t e){
285 //It calibrates Energy depending on the recpoint energy.
286// The energy of the reconstructed
287// cluster is corrected with the formula A + B* E + C* E^2, whose parameters
288// where obtained through the study of the reconstructed energy
289// distribution of monoenergetic photons.
290 Double_t enerec;
291 enerec = fACalParameter + fBCalParameter * e+ fCCalParameter * e * e;
292 return enerec ;
293
294}
295//____________________________________________________________________________
296Int_t AliPHOSPIDv1::GetPrincipalSign(Double_t* P, Int_t cluster, Int_t eff_pur)const
148b2bba 297{
298 //This method gives if the PCA of the particle are inside a defined ellipse
148b2bba 299 // Get the parameters that define the ellipse stored in the
300 // fParameters matrix.
301 Double_t X_center = (*fParameters)(cluster+6,eff_pur) ;
302 Double_t Y_center = (*fParameters)(cluster+9,eff_pur) ;
303 Double_t A = (*fParameters)(cluster+12,eff_pur) ;
304 Double_t B = (*fParameters)(cluster+15,eff_pur) ;
305 Double_t Angle = (*fParameters)(cluster+18,eff_pur) ;
306
307 Int_t prinsign;
308 Double_t Dx = 0. ;
309 Double_t Delta = 0. ;
310 Double_t Y = 0. ;
311 Double_t Y_1 = 0. ;
312 Double_t Y_2 = 0. ;
313 Double_t Pi = TMath::Pi() ;
314 Double_t Cos_Theta = TMath::Cos(Pi*Angle/180.) ;
315 Double_t Sin_Theta = TMath::Sin(Pi*Angle/180.) ;
316
317 Dx = P[0] - X_center ;
9fa5f1d0 318 Delta = 4.*A*A*B*B* (A*A*Cos_Theta*Cos_Theta
148b2bba 319 + B*B*Sin_Theta*Sin_Theta - Dx*Dx) ;
320 if (Delta < 0.)
321 {prinsign=0;}
322
323 else if (Delta == 0.)
324 {
325 Y = Cos_Theta*Sin_Theta*(A*A - B*B)*Dx /
326 (A*A*Cos_Theta*Cos_Theta + B*B*Sin_Theta*Sin_Theta) ;
327 Y += Y_center ;
328 if(P[1]==Y )
329 {prinsign=1;}
330 else
331 {prinsign=0;}
332 }
333 else
334 {
335 Y_1 = (Cos_Theta*Sin_Theta*(A*A - B*B) *Dx +
336 TMath::Sqrt(Delta)/2.)/(A*A*Cos_Theta*Cos_Theta +
337 B*B*Sin_Theta*Sin_Theta) ;
338 Y_2 = (Cos_Theta*Sin_Theta*(A*A - B*B) *Dx -
339 TMath::Sqrt(Delta)/2.)/(A*A*Cos_Theta*Cos_Theta
340 + B*B*Sin_Theta*Sin_Theta) ;
341 Y_1 += Y_center ;
342 Y_2 += Y_center ;
343 if ((P[1]<=Y_1) && (P[1]>=Y_2))
344 {prinsign=1;}
345 else
346 {prinsign=0;}
347 }
348 return prinsign;
349}
350
e0ed2e49 351//____________________________________________________________________________
352void AliPHOSPIDv1::SetEllipseParameters(Float_t Cluster_En, TString Eff_Pur, Float_t x, Float_t y,Float_t a, Float_t b,Float_t angle)
148b2bba 353{
354
355 // Set all ellipse parameters depending on the cluster energy and
356 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
357 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
358 // EFFICIENCY by PURITY)
e0ed2e49 359
f0a4c9e9 360 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 361 GetAnalysisParameters(Cluster_En) ;
362 if((fCluster!= -1)&&(eff_pur != -1)){
363 (*fParameters)(fCluster+6 +fMatrixExtraRow,eff_pur) = x ;
364 (*fParameters)(fCluster+9 +fMatrixExtraRow,eff_pur) = y ;
365 (*fParameters)(fCluster+12+fMatrixExtraRow,eff_pur) = a ;
366 (*fParameters)(fCluster+15+fMatrixExtraRow,eff_pur) = b ;
367 (*fParameters)(fCluster+18+fMatrixExtraRow,eff_pur) = angle ;
148b2bba 368 }
f0a4c9e9 369
148b2bba 370}
371//__________________________________________________________________________
372void AliPHOSPIDv1::SetEllipseXCenter(Float_t Cluster_En, TString Eff_Pur, Float_t x)
373{
374 // Set the ellipse parameter x_center depending on the custer energy and
375 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
376 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
377 // EFFICIENCY by PURITY)
f0a4c9e9 378 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 379 GetAnalysisParameters(Cluster_En) ;
380 if((fCluster!= -1)&&(eff_pur != -1))
381 (*fParameters)(fCluster+6+fMatrixExtraRow,eff_pur) = x ;
148b2bba 382}
383//_________________________________________________________________________
384void AliPHOSPIDv1::SetEllipseYCenter(Float_t Cluster_En, TString Eff_Pur, Float_t y)
385{
386
387 // Set the ellipse parameter y_center depending on the cluster energy and
388 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
389 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
390 // EFFICIENCY by PURITY)
9fa5f1d0 391
f0a4c9e9 392 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 393 GetAnalysisParameters(Cluster_En) ;
394 if((fCluster!= -1)&&(eff_pur != -1))
395 (*fParameters)(fCluster+9+fMatrixExtraRow,eff_pur) = y ;
148b2bba 396}
397//_________________________________________________________________________
398void AliPHOSPIDv1::SetEllipseAParameter(Float_t Cluster_En, TString Eff_Pur, Float_t a)
399{
400 // Set the ellipse parameter a depending on the cluster energy and
401 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
402 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
403 // EFFICIENCY by PURITY)
f0a4c9e9 404
f0a4c9e9 405 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 406 GetAnalysisParameters(Cluster_En) ;
407 if((fCluster!= -1)&&(eff_pur != -1))
408 (*fParameters)(fCluster+12+fMatrixExtraRow,eff_pur) = a ;
148b2bba 409}
410//________________________________________________________________________
411void AliPHOSPIDv1::SetEllipseBParameter(Float_t Cluster_En, TString Eff_Pur, Float_t b)
412{
413 // Set the ellipse parameter b depending on the cluster energy and
414 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
415 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
416 // EFFICIENCY by PURITY)
148b2bba 417
f0a4c9e9 418 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 419 GetAnalysisParameters(Cluster_En) ;
420 if((fCluster!= -1)&&(eff_pur != -1))
421 (*fParameters)(fCluster+15+fMatrixExtraRow,eff_pur) = b ;
148b2bba 422}
423//________________________________________________________________________
424void AliPHOSPIDv1::SetEllipseAngle(Float_t Cluster_En, TString Eff_Pur, Float_t angle)
425{
426
427 // Set the ellipse parameter angle depending on the cluster energy and
428 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
429 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
430 // EFFICIENCY by PURITY)
f0a4c9e9 431
f0a4c9e9 432 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 433 GetAnalysisParameters(Cluster_En) ;
434 if((fCluster!= -1)&&(eff_pur != -1))
435 (*fParameters)(fCluster+18+fMatrixExtraRow,eff_pur) = angle ;
148b2bba 436}
437//_____________________________________________________________________________
438void AliPHOSPIDv1::SetCpvtoEmcDistanceCut(Float_t Cluster_En, TString Eff_Pur, Float_t cut)
439{
440
441 // Set the parameter Cpvto EmcDistanceCut depending on the cluster energy and
442 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
443 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
444 // EFFICIENCY by PURITY)
445
92f521a9 446
9fa5f1d0 447 Int_t eff_pur = GetEffPurOption(Eff_Pur);
448 GetAnalysisParameters(Cluster_En) ;
449 if((fClusterrcpv!= -1)&&(eff_pur != -1))
450 (*fParameters)(fClusterrcpv,eff_pur) = cut ;
f0a4c9e9 451}
452//_____________________________________________________________________________
453void AliPHOSPIDv1::SetTimeGate(Float_t Cluster_En, TString Eff_Pur, Float_t gate)
454{
a496c46c 455
f0a4c9e9 456 // Set the parameter TimeGate depending on the cluster energy and
457 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
458 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
459 // EFFICIENCY by PURITY)
460
f0a4c9e9 461 Int_t eff_pur = GetEffPurOption(Eff_Pur);
9fa5f1d0 462 GetAnalysisParameters(Cluster_En) ;
463 if((fCluster!= -1)&&(eff_pur != -1))
464 (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur) = gate ;
f0a4c9e9 465}
a496c46c 466//_____________________________________________________________________________
9fa5f1d0 467void AliPHOSPIDv1::SetParameters()
468 //TString OptFileName)
a496c46c 469{
470 // PCA : To do the Principal Components Analysis it is necessary
471 // the Principal file, which is opened here
472 fX = new double[7]; // Data for the PCA
f0a4c9e9 473 fP = new double[7]; // Eigenvalues of the PCA
e0ed2e49 474
f0a4c9e9 475
9fa5f1d0 476 // Set the principal and parameters files to be used
477 fFileName5 = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-5.root" ;
478 fFileNamePar5 = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters_0.5_5.dat");
479 fFileName100 = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
480 fFileNamePar100 = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters_0.5_100.dat");
481
482 //SetPrincipalFileOptions();
483 //fOptFileName);
484 TFile f5( fFileName5.Data(), "read" ) ;
485 fPrincipal5 = dynamic_cast<TPrincipal*> (f5.Get("principal")) ;
486 f5.Close() ;
487 TFile f100( fFileName100.Data(), "read" ) ;
488 fPrincipal100 = dynamic_cast<TPrincipal*> (f100.Get("principal")) ;
489 f100.Close() ;
490 TFile f( fFileName100.Data(), "read" ) ;
a496c46c 491 fPrincipal = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
492 f.Close() ;
9fa5f1d0 493 // Initialization of the Parameters matrix. In the File ParametersXX.dat
494 // are all the parameters. These are introduced in a matrix of 21x3 or 22x3
495 // elements (depending on the principal file 21 rows for 0.5-5 GeV and 22
496 // rows for 5-100).
a496c46c 497 // All the parameters defined in this file are, in order of row (there are
9fa5f1d0 498 // 3 rows per parameter): CpvtoEmcDistanceCut(if the principal file is 5-100
499 // GeV then 4 rows), TimeGate and the ellipse parameters, X_center, Y_center,
f0a4c9e9 500 // a, b, angle. Each row of a given parameter depends on the cluster energy range
501 // (wich depends on the chosen principal file)
9fa5f1d0 502 // Each column designs the parameters for a point in the Efficiency-Purity
f0a4c9e9 503 // of the photon identification P1(96%,63%), P2(87%,0.88%) and P3(68%,94%)
504 // for the principal file from 0.5-5 GeV and for the other one P1(95%,79%),
505 // P2(89%,90%) and P3(72%,96%)
506
6f969528 507 fEnergyAnalysisCut = 5.; // Energy cut to change PCA
a496c46c 508
9fa5f1d0 509 fParameters5 = new TMatrixD(21,3) ;
510 fParameters100 = new TMatrixD(22,3) ;
511 fParameters = new TMatrixD(22,3) ;
512
6f969528 513 ifstream paramFile5(fFileNamePar5, ios_base::out) ;
a496c46c 514
515 Int_t i,j ;
516
9fa5f1d0 517 for(i = 0; i< 21; i++){
a496c46c 518 for(j = 0; j< 3; j++){
9fa5f1d0 519 paramFile5 >> (*fParameters5)(i,j) ;
520 }
521 }
522 paramFile5.close();
523
6f969528 524 ifstream paramFile100(fFileNamePar100, ios_base::out) ;
9fa5f1d0 525
526 Int_t l,k ;
527
528 for(l = 0; l< 22; l++){
529 for(k = 0; k< 3; k++){
530 paramFile100 >> (*fParameters100)(l,k) ;
531 }
532 }
533 paramFile100.close();
534
6f969528 535 ifstream paramFile(fFileNamePar100, ios_base::out) ;
9fa5f1d0 536 Int_t h,n;
537 for(h = 0; h< 22; h++){
538 for(n = 0; n< 3; n++){
539 paramFile >> (*fParameters)(h,n) ;
a496c46c 540 }
541 }
9fa5f1d0 542 paramFile.close();
543
544 fCluster = -1;
545 fClusterrcpv = -1;
546 fMatrixExtraRow = 0;
547
548 //Calibration parameters Encal = C * E^2 + B * E + A (E is the energy from cluster)
549 fACalParameter = 0.0241 ;
550 fBCalParameter = 1.0504 ;
551 fCCalParameter = 0.000249 ;
552
f0a4c9e9 553 // fParameters->Print();
a496c46c 554}
148b2bba 555//_____________________________________________________________________________
9fa5f1d0 556void AliPHOSPIDv1::GetAnalysisParameters(Float_t Cluster_En)
557{
6f969528 558 if(Cluster_En <= fEnergyAnalysisCut){
9fa5f1d0 559 fPrincipal = fPrincipal5;
560 fParameters = fParameters5;
561 fMatrixExtraRow = 0;
562 GetClusterOption(Cluster_En,kFALSE) ;
563 }
564 else{
565 fPrincipal = fPrincipal100;
566 fParameters = fParameters100;
567 fMatrixExtraRow = 1;
568 GetClusterOption(Cluster_En,kTRUE) ;
569 }
570}
571
572//_____________________________________________________________________________
573void AliPHOSPIDv1::GetClusterOption(const Float_t Cluster_En, const Bool_t range)
148b2bba 574{
575
f0a4c9e9 576 // Gives the cluster energy range.
6f969528 577 // range = kFALSE Default analysis range from 0.5 to 5 GeV
9fa5f1d0 578 // range = kTRUE analysis range from 0.5 to 100 GeV
579
f0a4c9e9 580
9fa5f1d0 581 //Int_t cluster = -1 ;
f0a4c9e9 582
9fa5f1d0 583 if((range == kFALSE)){
584 if((Cluster_En > 0.3)&&(Cluster_En <= 1.0)){
585 fCluster = 0 ;
586 fClusterrcpv = 0 ;
587 }
588 if((Cluster_En > 1.0)&&(Cluster_En <= 2.0)){
589 fCluster = 1 ;
590 fClusterrcpv = 1 ;
591 }
592 if( Cluster_En > 2.0){
593 fCluster = 2 ;
594 fClusterrcpv = 2 ;
595 }
f0a4c9e9 596 }
9fa5f1d0 597 else if(range == kTRUE){
598 if((Cluster_En > 0.5 )&&(Cluster_En <= 20.0)) fCluster = 0 ;
599 if((Cluster_En > 20.0)&&(Cluster_En <= 50.0)) fCluster = 1 ;
600 if( Cluster_En > 50.0) fCluster = 2 ;
601 if((Cluster_En > 5.0 )&&(Cluster_En <= 10.0)) fClusterrcpv = 0 ;
602 if((Cluster_En > 10.0)&&(Cluster_En <= 20.0)) fClusterrcpv = 1 ;
603 if((Cluster_En > 20.0)&&(Cluster_En <= 30.0)) fClusterrcpv = 2 ;
604 if( Cluster_En > 30.0) fClusterrcpv = 3 ;
f0a4c9e9 605 }
606 else {
9fa5f1d0 607 fCluster = -1 ;
608 fClusterrcpv = -1;
f0a4c9e9 609 cout<<"Invalid Energy option"<<endl;
610 }
611
9fa5f1d0 612 //return cluster;
f0a4c9e9 613}
614//____________________________________________________________________________
615Int_t AliPHOSPIDv1::GetEffPurOption(const TString Eff_Pur) const
616{
617
618 // Looks for the Purity-Efficiency point (possible options "HIGH EFFICIENCY"
148b2bba 619 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
620 // EFFICIENCY by PURITY)
621
148b2bba 622 Int_t eff_pur = -1 ;
623
f0a4c9e9 624 if(Eff_Pur.Contains("HIGH EFFICIENCY") ||Eff_Pur.Contains("LOW PURITY") )
625 eff_pur = 0 ;
626 else if(Eff_Pur.Contains("MEDIUM EFFICIENCY") ||Eff_Pur.Contains("MEDIUM PURITY") )
627 eff_pur = 1 ;
628 else if(Eff_Pur.Contains("LOW EFFICIENCY")||Eff_Pur.Contains("HIGH PURITY") )
629 eff_pur = 2 ;
148b2bba 630 else{
f0a4c9e9 631 eff_pur = -1;
632 cout<<"Invalid Efficiency-Purity option"<<endl;
633 cout<<"Possible options: HIGH EFFICIENCY = LOW PURITY"<<endl;
634 cout<<" MEDIUM EFFICIENCY = MEDIUM PURITY"<<endl;
635 cout<<" LOW EFFICIENCY = HIGH PURITY"<<endl;
148b2bba 636 }
f0a4c9e9 637
638 return eff_pur;
639}
148b2bba 640//____________________________________________________________________________
641
7acf6008 642void AliPHOSPIDv1::Exec(Option_t * option)
6ad0bfa0 643{
f035f6ce 644 //Steering method
9688c1dd 645
bf8f1fbd 646 if( strcmp(GetName(), "")== 0 )
7acf6008 647 Init() ;
bf8f1fbd 648
649 if(strstr(option,"tim"))
7acf6008 650 gBenchmark->Start("PHOSPID");
bf8f1fbd 651
652 if(strstr(option,"print")) {
7b7c1533 653 Print("") ;
654 return ;
bf8f1fbd 655 }
9688c1dd 656
148b2bba 657 //cout << gDirectory->GetName() << endl ;
658
bf8f1fbd 659 gAlice->GetEvent(0) ;
148b2bba 660
7b7c1533 661 //check, if the branch with name of this" already exits?
8d0f3f77 662 if (gAlice->TreeR()) {
663 TObjArray * lob = (TObjArray*)gAlice->TreeR()->GetListOfBranches() ;
664 TIter next(lob) ;
665 TBranch * branch = 0 ;
666 Bool_t phospidfound = kFALSE, pidfound = kFALSE ;
667
668 TString taskName(GetName()) ;
669 taskName.Remove(taskName.Index(Version())-1) ;
670
671 while ( (branch = (TBranch*)next()) && (!phospidfound || !pidfound) ) {
672 if ( (strcmp(branch->GetName(), "PHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
673 phospidfound = kTRUE ;
674
675 else if ( (strcmp(branch->GetName(), "AliPHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
676 pidfound = kTRUE ;
677 }
7b7c1533 678
8d0f3f77 679 if ( phospidfound || pidfound ) {
680 cerr << "WARNING: AliPHOSPIDv1::Exec -> RecParticles and/or PIDtMaker branch with name "
681 << taskName.Data() << " already exits" << endl ;
682 return ;
683 }
7b7c1533 684 }
9688c1dd 685
7b7c1533 686 Int_t nevents = (Int_t) gAlice->TreeE()->GetEntries() ;
687 Int_t ievent ;
148b2bba 688 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
7b7c1533 689 for(ievent = 0; ievent < nevents; ievent++){
a496c46c 690 gime->Event(ievent,"R") ;
148b2bba 691
7acf6008 692 MakeRecParticles() ;
9688c1dd 693
7b7c1533 694 WriteRecParticles(ievent);
9688c1dd 695
7acf6008 696 if(strstr(option,"deb"))
697 PrintRecParticles(option) ;
94de8339 698
699 //increment the total number of rec particles per run
a496c46c 700 fRecParticlesInRun += gime->RecParticles(BranchName())->GetEntriesFast() ;
94de8339 701
7acf6008 702 }
9688c1dd 703
7acf6008 704 if(strstr(option,"tim")){
705 gBenchmark->Stop("PHOSPID");
706 cout << "AliPHOSPID:" << endl ;
707 cout << " took " << gBenchmark->GetCpuTime("PHOSPID") << " seconds for PID "
7b7c1533 708 << gBenchmark->GetCpuTime("PHOSPID")/nevents << " seconds per event " << endl ;
7acf6008 709 cout << endl ;
710 }
9688c1dd 711
7b7c1533 712}
713
7acf6008 714//____________________________________________________________________________
715void AliPHOSPIDv1::MakeRecParticles(){
716
b2a60966 717 // Makes a RecParticle out of a TrackSegment
148b2bba 718
7b7c1533 719 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
148b2bba 720 TObjArray * emcRecPoints = gime->EmcRecPoints(fFrom) ;
721 TObjArray * cpvRecPoints = gime->CpvRecPoints(fFrom) ;
722 TClonesArray * trackSegments = gime->TrackSegments(fFrom) ;
723 if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
724 cerr << "ERROR: AliPHOSPIDv1::MakeRecParticles -> RecPoints or TrackSegments with name "
725 << fFrom << " not found ! " << endl ;
726 abort() ;
727 }
a496c46c 728 TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
01a599c9 729 recParticles->Clear();
148b2bba 730
731
7b7c1533 732 TIter next(trackSegments) ;
7acf6008 733 AliPHOSTrackSegment * ts ;
6ad0bfa0 734 Int_t index = 0 ;
09fc14a0 735 AliPHOSRecParticle * rp ;
7acf6008 736
7acf6008 737 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
fad3e5b9 738
7b7c1533 739 new( (*recParticles)[index] ) AliPHOSRecParticle() ;
740 rp = (AliPHOSRecParticle *)recParticles->At(index) ;
f0a4c9e9 741 rp->SetTrackSegment(index) ;
9688c1dd 742 rp->SetIndexInList(index) ;
148b2bba 743
7acf6008 744 AliPHOSEmcRecPoint * emc = 0 ;
745 if(ts->GetEmcIndex()>=0)
7b7c1533 746 emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
fad3e5b9 747
7acf6008 748 AliPHOSRecPoint * cpv = 0 ;
749 if(ts->GetCpvIndex()>=0)
7b7c1533 750 cpv = (AliPHOSRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
fad3e5b9 751
148b2bba 752 // Now set type (reconstructed) of the particle
753
754 // Choose the cluster energy range
9fa5f1d0 755
756 Float_t e = emc->GetEnergy() ;
6f969528 757
758 GetAnalysisParameters(e);// Gives value to fCluster, fClusterrcpv, fMatrixExtraRow, and to fPrincipal and fParameters depending on the energy.
759
9fa5f1d0 760 if((fCluster== -1)||(fClusterrcpv == -1)) continue ;
761
6f969528 762 Float_t lambda[2] ;
763 emc->GetElipsAxis(lambda) ;
764 Float_t time =emc->GetTime() ;
9fa5f1d0 765
6f969528 766 if((lambda[0]>0.01) && (lambda[1]>0.01) && time > 0.){
f0a4c9e9 767
6f969528 768 // Loop of Efficiency-Purity (the 3 points of purity or efficiency are taken
769 // into account to set the particle identification)
770 for(Int_t eff_pur = 0; eff_pur < 3 ; eff_pur++){
9fa5f1d0 771
772 // Looking at the CPV detector. If RCPV greater than CpvEmcDistance, 1st,
773 // 2nd or 3rd bit (depending on the efficiency-purity point )is set to 1 .
774
775 if(GetDistance(emc, cpv, "R") > (*fParameters)(fClusterrcpv,eff_pur) )
776 rp->SetPIDBit(eff_pur) ;
777
778 // Looking the TOF. If TOF smaller than gate, 4th, 5th or 6th
779 // bit (depending on the efficiency-purity point )is set to 1
780 if(time< (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur))
781 rp->SetPIDBit(eff_pur+3) ;
782
783 // Looking PCA. Define and calculate the data (X), introduce in the function
784 // X2P that gives the components (P).
785 Float_t Spher = 0. ;
786 Float_t Emaxdtotal = 0. ;
787
788 if((lambda[0]+lambda[1])!=0) Spher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
789
790 Emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
791
792 fX[0] = lambda[0] ;
793 fX[1] = lambda[1] ;
794 fX[2] = emc->GetDispersion() ;
795 fX[3] = Spher ;
796 fX[4] = emc->GetMultiplicity() ;
797 fX[5] = Emaxdtotal ;
798 fX[6] = emc->GetCoreEnergy() ;
799
800 fPrincipal->X2P(fX,fP);
801
802 //If we are inside the ellipse, 7th, 8th or 9th
803 // bit (depending on the efficiency-purity point )is set to 1
804 if(GetPrincipalSign(fP,fCluster+fMatrixExtraRow,eff_pur) == 1)
805 rp->SetPIDBit(eff_pur+6) ;
806
807 }
f0a4c9e9 808 }
148b2bba 809
9fa5f1d0 810 //Set momentum, energy and other parameters
811 Float_t encal = CalibratedEnergy(e);
812 TVector3 dir = GetMomentumDirection(emc,cpv) ;
813 dir.SetMag(encal) ;
814 rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),encal) ;
815 rp->SetCalcMass(0);
e0ed2e49 816 rp->Name(); //If photon sets the particle pdg name to gamma
e747b8da 817 rp->SetProductionVertex(0,0,0,0);
818 rp->SetFirstMother(-1);
819 rp->SetLastMother(-1);
820 rp->SetFirstDaughter(-1);
821 rp->SetLastDaughter(-1);
822 rp->SetPolarisation(0,0,0);
6ad0bfa0 823 index++ ;
824 }
7acf6008 825
6ad0bfa0 826}
827
09fc14a0 828//____________________________________________________________________________
a496c46c 829void AliPHOSPIDv1:: Print()
09fc14a0 830{
b2a60966 831 // Print the parameters used for the particle type identification
f035f6ce 832 cout << "=============== AliPHOSPID1 ================" << endl ;
833 cout << "Making PID "<< endl ;
834 cout << " Headers file: " << fHeaderFileName.Data() << endl ;
835 cout << " RecPoints branch title: " << fRecPointsTitle.Data() << endl ;
7b7c1533 836 cout << " TrackSegments Branch title: " << fTrackSegmentsTitle.Data() << endl ;
837 cout << " RecParticles Branch title " << fRecParticlesTitle.Data() << endl;
9fa5f1d0 838
839 cout << " Pricipal analysis file from 0.5 to 5 " << fFileName5.Data() << endl;
840 cout << " Name of parameters file "<<fFileNamePar5.Data() << endl ;
841 cout << " Matrix of Parameters: "<<endl;
842 cout << " 3 Columns [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]"<<endl;
843 cout << " 21 Rows, each 3 [ RCPV, TOF, X_Center, Y_Center, A, B, Angle ]"<<endl;
844 fParameters5->Print() ;
845
846 cout << " Pricipal analysis file from 5 to 100 " << fFileName100.Data() << endl;
847 cout << " Name of parameters file "<<fFileNamePar100.Data() << endl ;
e0ed2e49 848 cout << " Matrix of Parameters: "<<endl;
849 cout << " 3 Columns [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]"<<endl;
9fa5f1d0 850 cout << " 22 Rows, [ 4 RCPV, 3 TOF, 3 X_Center, 3 Y_Center, 3 A, 3 B, 3 Angle ]"<<endl;
851 fParameters100->Print() ;
852
853 cout << " Energy Calibration Parameters A + B* E + C * E^2"<<endl;
854 cout << " E is the energy from the cluster "<<endl;
855 cout << " A = "<< fACalParameter << endl;
856 cout << " B = "<< fBCalParameter << endl;
857 cout << " C = "<< fCCalParameter << endl;
f035f6ce 858 cout << "============================================" << endl ;
09fc14a0 859}
860
7acf6008 861//____________________________________________________________________________
7b7c1533 862void AliPHOSPIDv1::WriteRecParticles(Int_t event)
09fc14a0 863{
7b7c1533 864
865 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
a496c46c 866
867 TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
bf8f1fbd 868 recParticles->Expand(recParticles->GetEntriesFast() ) ;
8d0f3f77 869 TTree * treeR = gAlice->TreeR() ;
9688c1dd 870
8d0f3f77 871 if (!treeR)
872 gAlice->MakeTree("R", fSplitFile);
873 treeR = gAlice->TreeR() ;
7acf6008 874
875 //First rp
876 Int_t bufferSize = 32000 ;
8d0f3f77 877 TBranch * rpBranch = treeR->Branch("PHOSRP",&recParticles,bufferSize);
bf8f1fbd 878 rpBranch->SetTitle(fRecParticlesTitle);
8d0f3f77 879
9688c1dd 880
7acf6008 881 //second, pid
882 Int_t splitlevel = 0 ;
883 AliPHOSPIDv1 * pid = this ;
8d0f3f77 884 TBranch * pidBranch = treeR->Branch("AliPHOSPID","AliPHOSPIDv1",&pid,bufferSize,splitlevel);
9688c1dd 885 pidBranch->SetTitle(fRecParticlesTitle.Data());
7acf6008 886
761e34c0 887 rpBranch->Fill() ;
a496c46c 888 pidBranch->Fill() ;
9688c1dd 889
8d0f3f77 890 gAlice->TreeR()->AutoSave() ;// Write(0,kOverwrite) ;
7b7c1533 891
7acf6008 892}
69183710 893
7acf6008 894//____________________________________________________________________________
9688c1dd 895TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * cpv)const
7acf6008 896{
897 // Calculates the momentum direction:
898 // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
9688c1dd 899 // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
900 // However because of the poor position resolution of PPSD the direction is always taken as if we were
7acf6008 901 // in case 1.
902
903 TVector3 dir(0,0,0) ;
904
905 TVector3 emcglobalpos ;
906 TMatrix dummy ;
907
908 emc->GetGlobalPosition(emcglobalpos, dummy) ;
909
148b2bba 910
7acf6008 911 dir = emcglobalpos ;
912 dir.SetZ( -dir.Z() ) ; // why ?
913 dir.SetMag(1.) ;
914
915 //account correction to the position of IP
916 Float_t xo,yo,zo ; //Coordinates of the origin
917 gAlice->Generator()->GetOrigin(xo,yo,zo) ;
918 TVector3 origin(xo,yo,zo);
919 dir = dir - origin ;
920
921 return dir ;
922}
923//____________________________________________________________________________
a4e98857 924void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
925{
dd5c4038 926 // Print table of reconstructed particles
927
7b7c1533 928 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
bf8f1fbd 929
a496c46c 930 TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
9688c1dd 931
01a599c9 932 cout << "AliPHOSPIDv1: event "<<gAlice->GetEvNumber() << endl ;
7b7c1533 933 cout << " found " << recParticles->GetEntriesFast() << " RecParticles " << endl ;
9688c1dd 934
7acf6008 935 if(strstr(option,"all")) { // printing found TS
936
e0ed2e49 937 cout << " PARTICLE "
7acf6008 938 << " Index " << endl ;
7acf6008 939
940 Int_t index ;
7b7c1533 941 for (index = 0 ; index < recParticles->GetEntries() ; index++) {
148b2bba 942 AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
e0ed2e49 943
944 cout << setw(10) << rp->Name() << " "
945 << setw(5) << rp->GetIndexInList() << " " <<endl;
946 cout << "Type "<< rp->GetType() << endl;
7acf6008 947 }
948 cout << "-------------------------------------------" << endl ;
949 }
950
69183710 951}
952
7acf6008 953
954