1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 //_________________________________________________________________________
19 // Implementation version v1 of the PHOS particle identifier
20 // Particle identification based on the
21 // - RCPV: distance from CPV recpoint to EMCA recpoint.
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)
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.
42 // root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root","v1")
43 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
44 // // reading headers from file galice1.root and create RecParticles with title v1
45 // TrackSegments and RecPoints with title "v1" are used
46 // // set file name for the branch RecParticles
47 // root [1] p->ExecuteTask("deb all time")
48 // // available options
49 // // "deb" - prints # of reconstructed particles
50 // // "deb all" - prints # and list of RecParticles
51 // // "time" - prints benchmarking results
53 // root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1","v0")
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
57 // root [3] p2->ExecuteTask()
59 // There are two possible principal files available to do the analysis.
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.
64 //*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
65 // Gustavo Conesa April 2002
67 // --- ROOT system ---
76 #include "TBenchmark.h"
78 #include "TPrincipal.h"
81 // --- Standard library ---
87 // --- AliRoot header files ---
90 #include "AliGenerator.h"
92 #include "AliPHOSPIDv1.h"
93 #include "AliPHOSClusterizerv1.h"
94 #include "AliPHOSTrackSegment.h"
95 #include "AliPHOSTrackSegmentMakerv1.h"
96 #include "AliPHOSRecParticle.h"
97 #include "AliPHOSGeometry.h"
98 #include "AliPHOSGetter.h"
100 ClassImp( AliPHOSPIDv1)
102 //____________________________________________________________________________
103 AliPHOSPIDv1::AliPHOSPIDv1():AliPHOSPID()
110 //____________________________________________________________________________
111 AliPHOSPIDv1::AliPHOSPIDv1(const char * headerFile,const char * name, const char * from) : AliPHOSPID(headerFile, name)
115 //ctor with the indication on where to look for the track segments
128 //____________________________________________________________________________
129 AliPHOSPIDv1::~AliPHOSPIDv1()
132 // gime=0 if PID created by default ctor (to get just the parameters)
135 delete [] fX ; // Principal input
136 delete [] fP ; // Principal components
137 delete fParameters ; // Matrix of Parameters
138 delete fParameters5 ; // Matrix of Parameters
139 delete fParameters100 ; // Matrix of Parameters
142 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
145 // remove the task from the folder list
146 gime->RemoveTask("P",GetName()) ;
147 TString name(GetName()) ;
148 name.ReplaceAll("pid", "clu") ;
149 gime->RemoveTask("C",name) ;
151 // remove the data from the folder list
153 name.Remove(name.Index(":")) ;
154 gime->RemoveObjects("RE", name) ; // EMCARecPoints
155 gime->RemoveObjects("RC", name) ; // CPVRecPoints
156 gime->RemoveObjects("T", name) ; // TrackSegments
157 gime->RemoveObjects("P", name) ; // RecParticles
165 //____________________________________________________________________________
166 const TString AliPHOSPIDv1::BranchName() const
168 TString branchName(GetName() ) ;
169 branchName.Remove(branchName.Index(Version())-1) ;
173 //____________________________________________________________________________
174 void AliPHOSPIDv1::Init()
176 // Make all memory allocations that are not possible in default constructor
177 // Add the PID task to the list of PHOS tasks
179 if ( strcmp(GetTitle(), "") == 0 )
180 SetTitle("galice.root") ;
182 AliPHOSGetter * gime = AliPHOSGetter::GetInstance(GetTitle(), fFrom.Data()) ;
184 gime->SetRecParticlesTitle(BranchName()) ;
186 cerr << "ERROR: AliPHOSPIDv1::Init -> Could not obtain the Getter object !" << endl ;
190 gime->PostPID(this) ;
191 // create a folder on the white board //YSAlice/WhiteBoard/RecParticles/PHOS/recparticlesName
192 gime->PostRecParticles(BranchName()) ;
196 //____________________________________________________________________________
197 void AliPHOSPIDv1::InitParameters()
200 fHeaderFileName = GetTitle() ;
201 TString name(GetName()) ;
204 fTrackSegmentsTitle = name ;
205 fRecPointsTitle = name ;
206 fRecParticlesTitle = name ;
208 name.Append(Version()) ;
210 fRecParticlesInRun = 0 ;
214 fRecParticlesInRun = 0 ;
215 SetParameters() ; // fill the parameters matrix from parameters file
218 //____________________________________________________________________________
219 Double_t AliPHOSPIDv1::GetCpvtoEmcDistanceCut(const Float_t Cluster_En, const TString Eff_Pur)
221 // Get CpvtoEmcDistanceCut parameter depending on the cluster energy and
222 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
223 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
224 // EFFICIENCY by PURITY)
226 Int_t eff_pur = GetEffPurOption(Eff_Pur);
228 GetAnalysisParameters(Cluster_En) ;
229 if((fClusterrcpv!= -1)&&(eff_pur != -1))
230 return (*fParameters)(fClusterrcpv,eff_pur) ;
234 //____________________________________________________________________________
236 Double_t AliPHOSPIDv1::GetTimeGate(const Float_t Cluster_En, const TString Eff_Pur)
238 // Get TimeGate parameter depending on the cluster energy and
239 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
240 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
241 // EFFICIENCY by PURITY)
243 Int_t eff_pur = GetEffPurOption(Eff_Pur);
244 GetAnalysisParameters(Cluster_En) ;
246 if((fCluster!= -1)&&(eff_pur != -1))
247 return (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur) ;
252 //_____________________________________________________________________________
253 Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * Axis)const
255 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
257 const AliPHOSGeometry * geom = AliPHOSGetter::GetInstance()->PHOSGeometry() ;
261 emc->GetLocalPosition(vecEmc) ;
262 cpv->GetLocalPosition(vecCpv) ;
263 if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
264 // Correct to difference in CPV and EMC position due to different distance to center.
265 // we assume, that particle moves from center
266 Float_t dCPV = geom->GetIPtoOuterCoverDistance();
267 Float_t dEMC = geom->GetIPtoCrystalSurface() ;
269 vecCpv = dEMC * vecCpv - vecEmc ;
270 if (Axis == "X") return vecCpv.X();
271 if (Axis == "Y") return vecCpv.Y();
272 if (Axis == "Z") return vecCpv.Z();
273 if (Axis == "R") return vecCpv.Mag();
281 //____________________________________________________________________________
282 Double_t AliPHOSPIDv1::CalibratedEnergy(Float_t e){
283 //It calibrates Energy depending on the recpoint energy.
284 // The energy of the reconstructed
285 // cluster is corrected with the formula A + B* E + C* E^2, whose parameters
286 // where obtained through the study of the reconstructed energy
287 // distribution of monoenergetic photons.
289 enerec = fACalParameter + fBCalParameter * e+ fCCalParameter * e * e;
293 //____________________________________________________________________________
294 Int_t AliPHOSPIDv1::GetPrincipalSign(Double_t* P, Int_t cluster, Int_t eff_pur)const
296 //This method gives if the PCA of the particle are inside a defined ellipse
297 // Get the parameters that define the ellipse stored in the
298 // fParameters matrix.
299 Double_t X_center = (*fParameters)(cluster+6,eff_pur) ;
300 Double_t Y_center = (*fParameters)(cluster+9,eff_pur) ;
301 Double_t A = (*fParameters)(cluster+12,eff_pur) ;
302 Double_t B = (*fParameters)(cluster+15,eff_pur) ;
303 Double_t Angle = (*fParameters)(cluster+18,eff_pur) ;
307 Double_t Delta = 0. ;
311 Double_t Pi = TMath::Pi() ;
312 Double_t Cos_Theta = TMath::Cos(Pi*Angle/180.) ;
313 Double_t Sin_Theta = TMath::Sin(Pi*Angle/180.) ;
315 Dx = P[0] - X_center ;
316 Delta = 4.*A*A*B*B* (A*A*Cos_Theta*Cos_Theta
317 + B*B*Sin_Theta*Sin_Theta - Dx*Dx) ;
321 else if (Delta == 0.)
323 Y = Cos_Theta*Sin_Theta*(A*A - B*B)*Dx /
324 (A*A*Cos_Theta*Cos_Theta + B*B*Sin_Theta*Sin_Theta) ;
333 Y_1 = (Cos_Theta*Sin_Theta*(A*A - B*B) *Dx +
334 TMath::Sqrt(Delta)/2.)/(A*A*Cos_Theta*Cos_Theta +
335 B*B*Sin_Theta*Sin_Theta) ;
336 Y_2 = (Cos_Theta*Sin_Theta*(A*A - B*B) *Dx -
337 TMath::Sqrt(Delta)/2.)/(A*A*Cos_Theta*Cos_Theta
338 + B*B*Sin_Theta*Sin_Theta) ;
341 if ((P[1]<=Y_1) && (P[1]>=Y_2))
349 //____________________________________________________________________________
350 void AliPHOSPIDv1::SetEllipseParameters(Float_t Cluster_En, TString Eff_Pur, Float_t x, Float_t y,Float_t a, Float_t b,Float_t angle)
353 // Set all ellipse parameters depending on the cluster energy and
354 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
355 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
356 // EFFICIENCY by PURITY)
358 Int_t eff_pur = GetEffPurOption(Eff_Pur);
359 GetAnalysisParameters(Cluster_En) ;
360 if((fCluster!= -1)&&(eff_pur != -1)){
361 (*fParameters)(fCluster+6 +fMatrixExtraRow,eff_pur) = x ;
362 (*fParameters)(fCluster+9 +fMatrixExtraRow,eff_pur) = y ;
363 (*fParameters)(fCluster+12+fMatrixExtraRow,eff_pur) = a ;
364 (*fParameters)(fCluster+15+fMatrixExtraRow,eff_pur) = b ;
365 (*fParameters)(fCluster+18+fMatrixExtraRow,eff_pur) = angle ;
369 //__________________________________________________________________________
370 void AliPHOSPIDv1::SetEllipseXCenter(Float_t Cluster_En, TString Eff_Pur, Float_t x)
372 // Set the ellipse parameter x_center depending on the custer energy and
373 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
374 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
375 // EFFICIENCY by PURITY)
376 Int_t eff_pur = GetEffPurOption(Eff_Pur);
377 GetAnalysisParameters(Cluster_En) ;
378 if((fCluster!= -1)&&(eff_pur != -1))
379 (*fParameters)(fCluster+6+fMatrixExtraRow,eff_pur) = x ;
381 //_________________________________________________________________________
382 void AliPHOSPIDv1::SetEllipseYCenter(Float_t Cluster_En, TString Eff_Pur, Float_t y)
385 // Set the ellipse parameter y_center depending on the cluster energy and
386 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
387 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
388 // EFFICIENCY by PURITY)
390 Int_t eff_pur = GetEffPurOption(Eff_Pur);
391 GetAnalysisParameters(Cluster_En) ;
392 if((fCluster!= -1)&&(eff_pur != -1))
393 (*fParameters)(fCluster+9+fMatrixExtraRow,eff_pur) = y ;
395 //_________________________________________________________________________
396 void AliPHOSPIDv1::SetEllipseAParameter(Float_t Cluster_En, TString Eff_Pur, Float_t a)
398 // Set the ellipse parameter a depending on the cluster energy and
399 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
400 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
401 // EFFICIENCY by PURITY)
403 Int_t eff_pur = GetEffPurOption(Eff_Pur);
404 GetAnalysisParameters(Cluster_En) ;
405 if((fCluster!= -1)&&(eff_pur != -1))
406 (*fParameters)(fCluster+12+fMatrixExtraRow,eff_pur) = a ;
408 //________________________________________________________________________
409 void AliPHOSPIDv1::SetEllipseBParameter(Float_t Cluster_En, TString Eff_Pur, Float_t b)
411 // Set the ellipse parameter b depending on the cluster energy and
412 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
413 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
414 // EFFICIENCY by PURITY)
416 Int_t eff_pur = GetEffPurOption(Eff_Pur);
417 GetAnalysisParameters(Cluster_En) ;
418 if((fCluster!= -1)&&(eff_pur != -1))
419 (*fParameters)(fCluster+15+fMatrixExtraRow,eff_pur) = b ;
421 //________________________________________________________________________
422 void AliPHOSPIDv1::SetEllipseAngle(Float_t Cluster_En, TString Eff_Pur, Float_t angle)
425 // Set the ellipse parameter angle depending on the cluster energy and
426 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
427 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
428 // EFFICIENCY by PURITY)
430 Int_t eff_pur = GetEffPurOption(Eff_Pur);
431 GetAnalysisParameters(Cluster_En) ;
432 if((fCluster!= -1)&&(eff_pur != -1))
433 (*fParameters)(fCluster+18+fMatrixExtraRow,eff_pur) = angle ;
435 //_____________________________________________________________________________
436 void AliPHOSPIDv1::SetCpvtoEmcDistanceCut(Float_t Cluster_En, TString Eff_Pur, Float_t cut)
439 // Set the parameter Cpvto EmcDistanceCut depending on the cluster energy and
440 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
441 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
442 // EFFICIENCY by PURITY)
445 Int_t eff_pur = GetEffPurOption(Eff_Pur);
446 GetAnalysisParameters(Cluster_En) ;
447 if((fClusterrcpv!= -1)&&(eff_pur != -1))
448 (*fParameters)(fClusterrcpv,eff_pur) = cut ;
450 //_____________________________________________________________________________
451 void AliPHOSPIDv1::SetTimeGate(Float_t Cluster_En, TString Eff_Pur, Float_t gate)
454 // Set the parameter TimeGate depending on the cluster energy and
455 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
456 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
457 // EFFICIENCY by PURITY)
459 Int_t eff_pur = GetEffPurOption(Eff_Pur);
460 GetAnalysisParameters(Cluster_En) ;
461 if((fCluster!= -1)&&(eff_pur != -1))
462 (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur) = gate ;
464 //_____________________________________________________________________________
465 void AliPHOSPIDv1::SetParameters()
466 //TString OptFileName)
468 // PCA : To do the Principal Components Analysis it is necessary
469 // the Principal file, which is opened here
470 fX = new double[7]; // Data for the PCA
471 fP = new double[7]; // Eigenvalues of the PCA
474 // Set the principal and parameters files to be used
475 fFileName5 = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-5.root" ;
476 fFileNamePar5 = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters_0.5_5.dat");
477 fFileName100 = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
478 fFileNamePar100 = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters_0.5_100.dat");
480 //SetPrincipalFileOptions();
482 TFile f5( fFileName5.Data(), "read" ) ;
483 fPrincipal5 = dynamic_cast<TPrincipal*> (f5.Get("principal")) ;
485 TFile f100( fFileName100.Data(), "read" ) ;
486 fPrincipal100 = dynamic_cast<TPrincipal*> (f100.Get("principal")) ;
488 TFile f( fFileName100.Data(), "read" ) ;
489 fPrincipal = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
491 // Initialization of the Parameters matrix. In the File ParametersXX.dat
492 // are all the parameters. These are introduced in a matrix of 21x3 or 22x3
493 // elements (depending on the principal file 21 rows for 0.5-5 GeV and 22
495 // All the parameters defined in this file are, in order of row (there are
496 // 3 rows per parameter): CpvtoEmcDistanceCut(if the principal file is 5-100
497 // GeV then 4 rows), TimeGate and the ellipse parameters, X_center, Y_center,
498 // a, b, angle. Each row of a given parameter depends on the cluster energy range
499 // (wich depends on the chosen principal file)
500 // Each column designs the parameters for a point in the Efficiency-Purity
501 // of the photon identification P1(96%,63%), P2(87%,0.88%) and P3(68%,94%)
502 // for the principal file from 0.5-5 GeV and for the other one P1(95%,79%),
503 // P2(89%,90%) and P3(72%,96%)
506 fParameters5 = new TMatrixD(21,3) ;
507 fParameters100 = new TMatrixD(22,3) ;
508 fParameters = new TMatrixD(22,3) ;
510 ifstream paramFile5(fFileNamePar5, ios::in) ;
514 for(i = 0; i< 21; i++){
515 for(j = 0; j< 3; j++){
516 paramFile5 >> (*fParameters5)(i,j) ;
521 ifstream paramFile100(fFileNamePar100, ios::in) ;
525 for(l = 0; l< 22; l++){
526 for(k = 0; k< 3; k++){
527 paramFile100 >> (*fParameters100)(l,k) ;
530 paramFile100.close();
532 ifstream paramFile(fFileNamePar100, ios::in) ;
534 for(h = 0; h< 22; h++){
535 for(n = 0; n< 3; n++){
536 paramFile >> (*fParameters)(h,n) ;
545 //Calibration parameters Encal = C * E^2 + B * E + A (E is the energy from cluster)
546 fACalParameter = 0.0241 ;
547 fBCalParameter = 1.0504 ;
548 fCCalParameter = 0.000249 ;
550 // fParameters->Print();
552 //_____________________________________________________________________________
553 void AliPHOSPIDv1::GetAnalysisParameters(Float_t Cluster_En)
555 if(Cluster_En <= 5.){
556 fPrincipal = fPrincipal5;
557 fParameters = fParameters5;
559 GetClusterOption(Cluster_En,kFALSE) ;
562 fPrincipal = fPrincipal100;
563 fParameters = fParameters100;
565 GetClusterOption(Cluster_En,kTRUE) ;
569 //_____________________________________________________________________________
570 void AliPHOSPIDv1::GetClusterOption(const Float_t Cluster_En, const Bool_t range)
573 // Gives the cluster energy range.
574 // range = kFALSE Default analisys range from 0.5 to 5 GeV
575 // range = kTRUE analysis range from 0.5 to 100 GeV
578 //Int_t cluster = -1 ;
580 if((range == kFALSE)){
581 if((Cluster_En > 0.3)&&(Cluster_En <= 1.0)){
585 if((Cluster_En > 1.0)&&(Cluster_En <= 2.0)){
589 if( Cluster_En > 2.0){
594 else if(range == kTRUE){
595 if((Cluster_En > 0.5 )&&(Cluster_En <= 20.0)) fCluster = 0 ;
596 if((Cluster_En > 20.0)&&(Cluster_En <= 50.0)) fCluster = 1 ;
597 if( Cluster_En > 50.0) fCluster = 2 ;
598 if((Cluster_En > 5.0 )&&(Cluster_En <= 10.0)) fClusterrcpv = 0 ;
599 if((Cluster_En > 10.0)&&(Cluster_En <= 20.0)) fClusterrcpv = 1 ;
600 if((Cluster_En > 20.0)&&(Cluster_En <= 30.0)) fClusterrcpv = 2 ;
601 if( Cluster_En > 30.0) fClusterrcpv = 3 ;
606 cout<<"Invalid Energy option"<<endl;
611 //____________________________________________________________________________
612 Int_t AliPHOSPIDv1::GetEffPurOption(const TString Eff_Pur) const
615 // Looks for the Purity-Efficiency point (possible options "HIGH EFFICIENCY"
616 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
617 // EFFICIENCY by PURITY)
621 if(Eff_Pur.Contains("HIGH EFFICIENCY") ||Eff_Pur.Contains("LOW PURITY") )
623 else if(Eff_Pur.Contains("MEDIUM EFFICIENCY") ||Eff_Pur.Contains("MEDIUM PURITY") )
625 else if(Eff_Pur.Contains("LOW EFFICIENCY")||Eff_Pur.Contains("HIGH PURITY") )
629 cout<<"Invalid Efficiency-Purity option"<<endl;
630 cout<<"Possible options: HIGH EFFICIENCY = LOW PURITY"<<endl;
631 cout<<" MEDIUM EFFICIENCY = MEDIUM PURITY"<<endl;
632 cout<<" LOW EFFICIENCY = HIGH PURITY"<<endl;
637 //____________________________________________________________________________
639 void AliPHOSPIDv1::Exec(Option_t * option)
643 if( strcmp(GetName(), "")== 0 )
646 if(strstr(option,"tim"))
647 gBenchmark->Start("PHOSPID");
649 if(strstr(option,"print")) {
654 //cout << gDirectory->GetName() << endl ;
656 gAlice->GetEvent(0) ;
658 //check, if the branch with name of this" already exits?
659 if (gAlice->TreeR()) {
660 TObjArray * lob = (TObjArray*)gAlice->TreeR()->GetListOfBranches() ;
662 TBranch * branch = 0 ;
663 Bool_t phospidfound = kFALSE, pidfound = kFALSE ;
665 TString taskName(GetName()) ;
666 taskName.Remove(taskName.Index(Version())-1) ;
668 while ( (branch = (TBranch*)next()) && (!phospidfound || !pidfound) ) {
669 if ( (strcmp(branch->GetName(), "PHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
670 phospidfound = kTRUE ;
672 else if ( (strcmp(branch->GetName(), "AliPHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
676 if ( phospidfound || pidfound ) {
677 cerr << "WARNING: AliPHOSPIDv1::Exec -> RecParticles and/or PIDtMaker branch with name "
678 << taskName.Data() << " already exits" << endl ;
683 Int_t nevents = (Int_t) gAlice->TreeE()->GetEntries() ;
685 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
686 for(ievent = 0; ievent < nevents; ievent++){
687 gime->Event(ievent,"R") ;
691 WriteRecParticles(ievent);
693 if(strstr(option,"deb"))
694 PrintRecParticles(option) ;
696 //increment the total number of rec particles per run
697 fRecParticlesInRun += gime->RecParticles(BranchName())->GetEntriesFast() ;
701 if(strstr(option,"tim")){
702 gBenchmark->Stop("PHOSPID");
703 cout << "AliPHOSPID:" << endl ;
704 cout << " took " << gBenchmark->GetCpuTime("PHOSPID") << " seconds for PID "
705 << gBenchmark->GetCpuTime("PHOSPID")/nevents << " seconds per event " << endl ;
711 //____________________________________________________________________________
712 void AliPHOSPIDv1::MakeRecParticles(){
714 // Makes a RecParticle out of a TrackSegment
716 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
717 TObjArray * emcRecPoints = gime->EmcRecPoints(fFrom) ;
718 TObjArray * cpvRecPoints = gime->CpvRecPoints(fFrom) ;
719 TClonesArray * trackSegments = gime->TrackSegments(fFrom) ;
720 if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
721 cerr << "ERROR: AliPHOSPIDv1::MakeRecParticles -> RecPoints or TrackSegments with name "
722 << fFrom << " not found ! " << endl ;
725 TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
726 recParticles->Clear();
729 TIter next(trackSegments) ;
730 AliPHOSTrackSegment * ts ;
732 AliPHOSRecParticle * rp ;
734 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
736 new( (*recParticles)[index] ) AliPHOSRecParticle() ;
737 rp = (AliPHOSRecParticle *)recParticles->At(index) ;
738 rp->SetTrackSegment(index) ;
739 rp->SetIndexInList(index) ;
741 AliPHOSEmcRecPoint * emc = 0 ;
742 if(ts->GetEmcIndex()>=0)
743 emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
745 AliPHOSRecPoint * cpv = 0 ;
746 if(ts->GetCpvIndex()>=0)
747 cpv = (AliPHOSRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
749 // Now set type (reconstructed) of the particle
751 // Choose the cluster energy range
753 Float_t e = emc->GetEnergy() ;
756 GetAnalysisParameters(e);
758 if((fCluster== -1)||(fClusterrcpv == -1)) continue ;
760 // Ellipse and rcpv cut in function of the cluster energy
762 // Loop of Efficiency-Purity (the 3 points of purity or efficiency are taken
763 // into account to set the particle identification)
764 for(Int_t eff_pur = 0; eff_pur < 3 ; eff_pur++){
767 emc->GetElipsAxis(lambda) ;
768 Float_t time =emc->GetTime() ;
770 if((lambda[0]>0.01) && (lambda[1]>0.01) && time > 0.){
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 .
775 if(GetDistance(emc, cpv, "R") > (*fParameters)(fClusterrcpv,eff_pur) )
776 rp->SetPIDBit(eff_pur) ;
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) ;
783 // Looking PCA. Define and calculate the data (X), introduce in the function
784 // X2P that gives the components (P).
786 Float_t Emaxdtotal = 0. ;
788 if((lambda[0]+lambda[1])!=0) Spher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
790 Emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
794 fX[2] = emc->GetDispersion() ;
796 fX[4] = emc->GetMultiplicity() ;
798 fX[6] = emc->GetCoreEnergy() ;
800 fPrincipal->X2P(fX,fP);
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) ;
810 //Set momentum, energy and other parameters
811 Float_t encal = CalibratedEnergy(e);
812 TVector3 dir = GetMomentumDirection(emc,cpv) ;
814 rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),encal) ;
816 rp->Name(); //If photon sets the particle pdg name to gamma
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);
828 //____________________________________________________________________________
829 void AliPHOSPIDv1:: Print()
831 // Print the parameters used for the particle type identification
832 cout << "=============== AliPHOSPID1 ================" << endl ;
833 cout << "Making PID "<< endl ;
834 cout << " Headers file: " << fHeaderFileName.Data() << endl ;
835 cout << " RecPoints branch title: " << fRecPointsTitle.Data() << endl ;
836 cout << " TrackSegments Branch title: " << fTrackSegmentsTitle.Data() << endl ;
837 cout << " RecParticles Branch title " << fRecParticlesTitle.Data() << endl;
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() ;
846 cout << " Pricipal analysis file from 5 to 100 " << fFileName100.Data() << endl;
847 cout << " Name of parameters file "<<fFileNamePar100.Data() << endl ;
848 cout << " Matrix of Parameters: "<<endl;
849 cout << " 3 Columns [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]"<<endl;
850 cout << " 22 Rows, [ 4 RCPV, 3 TOF, 3 X_Center, 3 Y_Center, 3 A, 3 B, 3 Angle ]"<<endl;
851 fParameters100->Print() ;
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;
858 cout << "============================================" << endl ;
861 //____________________________________________________________________________
862 void AliPHOSPIDv1::WriteRecParticles(Int_t event)
865 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
867 TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
868 recParticles->Expand(recParticles->GetEntriesFast() ) ;
869 TTree * treeR = gAlice->TreeR() ;
872 gAlice->MakeTree("R", fSplitFile);
873 treeR = gAlice->TreeR() ;
876 Int_t bufferSize = 32000 ;
877 TBranch * rpBranch = treeR->Branch("PHOSRP",&recParticles,bufferSize);
878 rpBranch->SetTitle(fRecParticlesTitle);
882 Int_t splitlevel = 0 ;
883 AliPHOSPIDv1 * pid = this ;
884 TBranch * pidBranch = treeR->Branch("AliPHOSPID","AliPHOSPIDv1",&pid,bufferSize,splitlevel);
885 pidBranch->SetTitle(fRecParticlesTitle.Data());
890 gAlice->TreeR()->AutoSave() ;// Write(0,kOverwrite) ;
894 //____________________________________________________________________________
895 TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * cpv)const
897 // Calculates the momentum direction:
898 // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
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
903 TVector3 dir(0,0,0) ;
905 TVector3 emcglobalpos ;
908 emc->GetGlobalPosition(emcglobalpos, dummy) ;
912 dir.SetZ( -dir.Z() ) ; // why ?
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);
923 //____________________________________________________________________________
924 void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
926 // Print table of reconstructed particles
928 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
930 TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
932 cout << "AliPHOSPIDv1: event "<<gAlice->GetEvNumber() << endl ;
933 cout << " found " << recParticles->GetEntriesFast() << " RecParticles " << endl ;
935 if(strstr(option,"all")) { // printing found TS
938 << " Index " << endl ;
941 for (index = 0 ; index < recParticles->GetEntries() ; index++) {
942 AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
944 cout << setw(10) << rp->Name() << " "
945 << setw(5) << rp->GetIndexInList() << " " <<endl;
946 cout << "Type "<< rp->GetType() << endl;
948 cout << "-------------------------------------------" << endl ;