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 the parameters a, b, c, x0 and y0.
32 // (each bit corresponds to a different efficiency-purity point of the
33 // photon identification)
34 // The PCA (Principal components analysis) needs a file that contains
35 // a previous analysis of the correlations between the particles. This
36 // file is $ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root. Analysis don for
37 // energies between 0.5 and 100 GeV.
38 // A calibrated energy is calculated. The energy of the reconstructed
39 // cluster is corrected with the formula A + B * E + C * E^2, whose
40 // parameters where obtained thourgh the study of the reconstructed
41 // energy distribution of monoenergetic photons.
43 // All the parameters (RCPV(6 rows-3 columns),TOF(6r-3c),PCA(5r-4c)
44 // and calibration(1r-3c))are stored in a file called
45 // $ALICE_ROOT/PHOS/Parameters.dat. Each time that AliPHOSPIDv1 is
46 // initialized, this parameters are copied to a Matrix (18,4), a
50 // root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root")
51 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
52 // // reading headers from file galice1.root and create RecParticles
53 // TrackSegments and RecPoints are used
54 // // set file name for the branch RecParticles
55 // root [1] p->ExecuteTask("deb all time")
56 // // available options
57 // // "deb" - prints # of reconstructed particles
58 // // "deb all" - prints # and list of RecParticles
59 // // "time" - prints benchmarking results
61 // root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1",kTRUE)
62 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
64 // root [3] p2->ExecuteTask()
68 //*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
69 // Gustavo Conesa April 2002
70 // PCA redesigned by Gustavo Conesa October 2002:
71 // The way of using the PCA has changed. Instead of 2
72 // files with the PCA, each one with different energy ranges
73 // of application, we use the wide one (0.5-100 GeV), and instead
74 // of fixing 3 elipses for different ranges of energy, it has been
75 // studied the dependency of the ellipses parameters with the
76 // energy, and they are implemented in the code as a funtion
81 // --- ROOT system ---
90 #include "TBenchmark.h"
92 #include "TPrincipal.h"
95 // --- Standard library ---
97 #include <Riostream.h>
101 // --- AliRoot header files ---
104 #include "AliGenerator.h"
106 #include "AliPHOSPIDv1.h"
107 #include "AliPHOSClusterizerv1.h"
108 #include "AliPHOSTrackSegment.h"
109 #include "AliPHOSTrackSegmentMakerv1.h"
110 #include "AliPHOSRecParticle.h"
111 #include "AliPHOSGeometry.h"
112 #include "AliPHOSGetter.h"
114 ClassImp( AliPHOSPIDv1)
116 //____________________________________________________________________________
117 AliPHOSPIDv1::AliPHOSPIDv1():AliPHOSPID()
122 fDefaultInit = kTRUE ;
126 //____________________________________________________________________________
127 AliPHOSPIDv1::AliPHOSPIDv1(const char * headerFile,const char * name, const Bool_t toSplit)
128 :AliPHOSPID(headerFile, name,toSplit)
130 //ctor with the indication on where to look for the track segments
135 fDefaultInit = kFALSE ;
139 //____________________________________________________________________________
140 AliPHOSPIDv1::~AliPHOSPIDv1()
143 // fDefaultInit = kTRUE if PID created by default ctor (to get just the parameters)
145 delete [] fX ; // Principal input
146 delete [] fP ; // Principal components
147 // delete fParameters ; // Matrix of Parameters
152 // AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
153 // remove the task from the folder list
154 // gime->RemoveTask("P",GetName()) ;
155 // TString name(GetName()) ;
156 // name.ReplaceAll("pid", "clu") ;
157 // gime->RemoveTask("C",name) ;
159 // // remove the data from the folder list
160 // name = GetName() ;
161 // name.Remove(name.Index(":")) ;
162 // gime->RemoveObjects("RE", name) ; // EMCARecPoints
163 // gime->RemoveObjects("RC", name) ; // CPVRecPoints
164 // gime->RemoveObjects("T", name) ; // TrackSegments
165 // gime->RemoveObjects("P", name) ; // RecParticles
168 // gime->CloseFile() ;
174 //____________________________________________________________________________
175 const TString AliPHOSPIDv1::BranchName() const
177 TString branchName(GetName() ) ;
178 branchName.Remove(branchName.Index(Version())-1) ;
182 //____________________________________________________________________________
183 void AliPHOSPIDv1::Init()
185 // Make all memory allocations that are not possible in default constructor
186 // Add the PID task to the list of PHOS tasks
188 if ( strcmp(GetTitle(), "") == 0 )
189 SetTitle("galice.root") ;
191 TString branchname(GetName()) ;
192 branchname.Remove(branchname.Index(Version())-1) ;
193 AliPHOSGetter * gime = AliPHOSGetter::GetInstance(GetTitle(),branchname.Data(),fToSplit ) ;
195 // gime->SetRecParticlesTitle(BranchName()) ;
197 cerr << "ERROR: AliPHOSPIDv1::Init -> Could not obtain the Getter object !" << endl ;
203 //First - extract full path if necessary
204 TString fileName(GetTitle()) ;
205 Ssiz_t islash = fileName.Last('/') ;
206 if(islash<fileName.Length())
207 fileName.Remove(islash+1,fileName.Length()) ;
210 fileName+="PHOS.RecData." ;
211 if((strcmp(branchname.Data(),"Default")!=0)&&(strcmp(branchname.Data(),"")!=0)){
212 fileName+=branchname.Data() ;
216 fSplitFile = static_cast<TFile*>(gROOT->GetFile(fileName.Data()));
218 fSplitFile = TFile::Open(fileName.Data(),"update") ;
221 gime->PostPID(this) ;
222 // create a folder on the white board //YSAlice/WhiteBoard/RecParticles/PHOS/recparticlesName
223 gime->PostRecParticles(branchname) ;
227 //____________________________________________________________________________
228 void AliPHOSPIDv1::InitParameters()
231 // fHeaderFileName = GetTitle() ;
232 // TString name(GetName()) ;
233 // if (name.IsNull())
234 // name = "Default" ;
235 // fTrackSegmentsTitle = name ;
236 // fRecPointsTitle = name ;
237 // fRecParticlesTitle = name ;
238 // name.Append(":") ;
239 // name.Append(Version()) ;
241 fRecParticlesInRun = 0 ;
243 // fClusterizer = 0 ;
245 fRecParticlesInRun = 0 ;
246 TString pidName( GetName()) ;
247 if (pidName.IsNull() )
248 pidName = "Default" ;
249 pidName.Append(":") ;
250 pidName.Append(Version()) ;
252 SetParameters() ; // fill the parameters matrix from parameters file
255 //____________________________________________________________________________
256 const Double_t AliPHOSPIDv1::GetCpvtoEmcDistanceCut(const Float_t Cluster_En, const TString Eff_Pur) const
258 // Get CpvtoEmcDistanceCut parameter depending on the cluster energy and
259 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
260 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
261 // EFFICIENCY by PURITY)
263 Int_t eff_pur = GetEffPurOption(Eff_Pur);
264 Int_t cluster = GetClusterOption(Cluster_En) ;
265 if((cluster!= -1)&&(eff_pur != -1))
266 return (*fParameters)(cluster,eff_pur) ;
270 //____________________________________________________________________________
272 const Double_t AliPHOSPIDv1::GetTimeGate(const Float_t Cluster_En, const TString Eff_Pur) const
274 // Get TimeGate parameter depending on the cluster energy and
275 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
276 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
277 // EFFICIENCY by PURITY)
279 Int_t eff_pur = GetEffPurOption(Eff_Pur);
280 Int_t cluster = GetClusterOption(Cluster_En) ;
281 if((cluster!= -1)&&(eff_pur != -1))
282 return (*fParameters)(cluster+6,eff_pur) ;
287 //_____________________________________________________________________________
288 const Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * Axis)const
290 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
292 const AliPHOSGeometry * geom = AliPHOSGetter::GetInstance()->PHOSGeometry() ;
296 emc->GetLocalPosition(vecEmc) ;
297 cpv->GetLocalPosition(vecCpv) ;
298 if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
299 // Correct to difference in CPV and EMC position due to different distance to center.
300 // we assume, that particle moves from center
301 Float_t dCPV = geom->GetIPtoOuterCoverDistance();
302 Float_t dEMC = geom->GetIPtoCrystalSurface() ;
304 vecCpv = dEMC * vecCpv - vecEmc ;
305 if (Axis == "X") return vecCpv.X();
306 if (Axis == "Y") return vecCpv.Y();
307 if (Axis == "Z") return vecCpv.Z();
308 if (Axis == "R") return vecCpv.Mag();
316 //____________________________________________________________________________
317 const Double_t AliPHOSPIDv1::GetCalibratedEnergy(const Float_t e) const
319 // It calibrates Energy depending on the recpoint energy.
320 // The energy of the reconstructed cluster is corrected with
321 // the formula A + B* E + C* E^2, whose parameters where obtained
322 // through the study of the reconstructed energy distribution of
323 // monoenergetic photons.
325 Double_t p[]={0.,0.,0.};
327 for(i=0;i<3;i++) p[i]= (*fParameters)(17,i);
328 Double_t enerec = p[0] + p[1]* e+ p[2] * e * e;
332 //____________________________________________________________________________
333 const Int_t AliPHOSPIDv1::GetPrincipalSign(const Double_t* P,const Int_t eff_pur, const Float_t E)const
335 //Is the particle inside de PCA ellipse?
338 Double_t A = GetEllipseParameter("a", E);
339 Double_t B = GetEllipseParameter("b", E);
340 Double_t C = GetEllipseParameter("c", E);
341 Double_t X_center = GetEllipseParameter("x0", E);
342 Double_t Y_center = GetEllipseParameter("y0", E);
344 Double_t R = TMath::Power((P[0] - X_center)/A,2) +
345 TMath::Power((P[1] - Y_center)/B,2) +
346 C*(P[0] - X_center)*(P[1] - Y_center)/(A*B) ;
347 //3 different ellipses defined
348 if((eff_pur==2)&&(R <1./2.)) prinsign= 1;
349 if((eff_pur==1)&&(R <2. )) prinsign= 1;
350 if((eff_pur==0)&&(R <9./2.)) prinsign= 1;
352 if(R<0)cout<<"Error: Negative square?"<<endl;
357 //_____________________________________________________________________________
358 void AliPHOSPIDv1::SetCpvtoEmcDistanceCut(Float_t Cluster_En, TString Eff_Pur, Float_t cut)
361 // Set the parameter Cpvto EmcDistanceCut depending on the cluster energy and
362 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
363 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
364 // EFFICIENCY by PURITY)
367 Int_t eff_pur = GetEffPurOption(Eff_Pur);
368 Int_t cluster = GetClusterOption(Cluster_En) ;
369 if((cluster!= -1)&&(eff_pur != -1))
370 (*fParameters)(cluster,eff_pur) = cut ;
372 //_____________________________________________________________________________
373 void AliPHOSPIDv1::SetTimeGate(Float_t Cluster_En, TString Eff_Pur, Float_t gate)
376 // Set the parameter TimeGate depending on the cluster energy and
377 // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
378 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
379 // EFFICIENCY by PURITY)
381 Int_t eff_pur = GetEffPurOption(Eff_Pur);
382 Int_t cluster = GetClusterOption(Cluster_En) ;
383 if((cluster!= -1)&&(eff_pur != -1))
384 (*fParameters)(cluster+6,eff_pur) = gate ;
386 //_____________________________________________________________________________
387 void AliPHOSPIDv1::SetParameters()
389 // PCA : To do the Principal Components Analysis it is necessary
390 // the Principal file, which is opened here
391 fX = new double[7]; // Data for the PCA
392 fP = new double[7]; // Eigenvalues of the PCA
394 // Open principal and parameters files to be used
396 fFileName = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
397 fFileNamePar = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters.dat");
398 TFile f( fFileName.Data(), "read" ) ;
399 fPrincipal = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
402 // Initialization of the Parameters matrix. In the File Parameters.dat
403 // are all the parameters. These are introduced in a matrix of 18x4
405 // All the parameters defined in this file are, in order of row:
406 // CpvtoEmcDistanceCut (6 rows, each one depends on the energy range of the
407 // particle, and 3 columns, each one depending on the efficiency-purity
408 // point), TimeGate (the same) and the parameters of the functions that
409 // calculate the ellipse parameters, x0,y0,a, b, c. These 5 parameters
410 // (5 rows) depend on 4 parameters (columns). Finally there is a row with
411 // the energy calibration parameters, 3 parameters.
413 fParameters = new TMatrixD(18,4) ;
415 ifstream paramFile(fFileNamePar) ;
417 for(h = 0; h< 18; h++){
418 for(n = 0; n< 4; n++){
419 paramFile >> (*fParameters)(h,n) ;
424 //_____________________________________________________________________________
425 const Int_t AliPHOSPIDv1::GetClusterOption(const Float_t Cluster_En) const
427 // Gives the cluster energy range, for each range there is associated a TOF or RCPV
430 if((Cluster_En > 0.0 )&&(Cluster_En <= 2.0 )) cluster = 0 ;
431 if((Cluster_En > 2.0 )&&(Cluster_En <= 5.0 )) cluster = 1 ;
432 if((Cluster_En > 5.0 )&&(Cluster_En <= 10.0)) cluster = 2 ;
433 if((Cluster_En > 10.0)&&(Cluster_En <= 20.0)) cluster = 3 ;
434 if((Cluster_En > 20.0)&&(Cluster_En <= 30.0)) cluster = 4 ;
435 if( Cluster_En > 30.0) cluster = 5 ;
439 //____________________________________________________________________________
440 const Int_t AliPHOSPIDv1::GetEffPurOption(const TString Eff_Pur) const
443 // Looks for the Purity-Efficiency point (possible options "HIGH EFFICIENCY"
444 // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
445 // EFFICIENCY by PURITY)
449 if(Eff_Pur.Contains("HIGH EFFICIENCY") ||Eff_Pur.Contains("LOW PURITY") )
451 else if(Eff_Pur.Contains("MEDIUM EFFICIENCY") ||Eff_Pur.Contains("MEDIUM PURITY") )
453 else if(Eff_Pur.Contains("LOW EFFICIENCY")||Eff_Pur.Contains("HIGH PURITY") )
457 cout<<"Invalid Efficiency-Purity option"<<endl;
458 cout<<"Possible options: HIGH EFFICIENCY = LOW PURITY"<<endl;
459 cout<<" MEDIUM EFFICIENCY = MEDIUM PURITY"<<endl;
460 cout<<" LOW EFFICIENCY = HIGH PURITY"<<endl;
465 //________________________________________________________________________
466 void AliPHOSPIDv1::SetEllipseParameter(TString Param, Int_t i, Double_t par)
468 // Set the parameter "i" that is needed to calculate the ellipse
469 // parameter "Param".
473 if(Param.Contains("a"))p=12;
474 if(Param.Contains("b"))p=13;
475 if(Param.Contains("c"))p=14;
476 if(Param.Contains("x0"))p=15;
477 if(Param.Contains("y0"))p=16;
479 cout<<"Error:: No parameter with index "<<i<<endl;
481 cout<<"Error:: No parameter with name "<<Param<<endl;
483 (*fParameters)(p,i) = par ;
485 //________________________________________________________________________
486 const Double_t AliPHOSPIDv1::GetParameterToCalculateEllipse(const TString Param, const Int_t i) const
488 // Get the parameter "i" that is needed to calculate the ellipse
489 // parameter "Param".
494 if(Param.Contains("a"))p=12;
495 if(Param.Contains("b"))p=13;
496 if(Param.Contains("c"))p=14;
497 if(Param.Contains("x0"))p=15;
498 if(Param.Contains("y0"))p=16;
501 cout<<"Error:: No parameter with index "<<i<<endl;
503 cout<<"Error:: No parameter with name "<<Param<<endl;
505 par = (*fParameters)(p,i) ;
510 //____________________________________________________________________________
511 void AliPHOSPIDv1::SetCalibrationParameter(Int_t i,Double_t param)
513 (*fParameters)(17,i) = param ;
515 //____________________________________________________________________________
516 const Double_t AliPHOSPIDv1::GetCalibrationParameter(const Int_t i) const
518 Float_t param = (*fParameters)(17,i);
521 //____________________________________________________________________________
522 const Double_t AliPHOSPIDv1::GetEllipseParameter(const TString Param,Float_t E) const
524 Double_t p[4]={0.,0.,0.,0.};
525 Double_t value = 0.0;
528 if(Param.Contains("a")){
529 for(i=0;i<4;i++)p[i]=(*fParameters)(12,i);
533 if(Param.Contains("b")){
534 for(i=0;i<4;i++)p[i]=(*fParameters)(13,i);
538 if(Param.Contains("c"))
539 for(i=0;i<4;i++)p[i]=(*fParameters)(14,i);
541 if(Param.Contains("x0")){
542 for(i=0;i<4;i++)p[i]=(*fParameters)(15,i);
545 if(Param.Contains("y0"))
546 for(i=0;i<4;i++)p[i]=(*fParameters)(16,i);
548 value = p[0]/TMath::Sqrt(E)+p[1]*E+p[2]*E*E+p[3];
551 //____________________________________________________________________________
553 void AliPHOSPIDv1::Exec(Option_t * option)
557 if( strcmp(GetName(), "")== 0 )
560 if(strstr(option,"tim"))
561 gBenchmark->Start("PHOSPID");
563 if(strstr(option,"print")) {
569 // gAlice->GetEvent(0) ;
571 // //check, if the branch with name of this" already exits?
572 // if (gAlice->TreeR()) {
573 // TObjArray * lob = (TObjArray*)gAlice->TreeR()->GetListOfBranches() ;
575 // TBranch * branch = 0 ;
576 // Bool_t phospidfound = kFALSE, pidfound = kFALSE ;
578 // TString taskName(GetName()) ;
579 // taskName.Remove(taskName.Index(Version())-1) ;
581 // while ( (branch = (TBranch*)next()) && (!phospidfound || !pidfound) ) {
582 // if ( (strcmp(branch->GetName(), "PHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
583 // phospidfound = kTRUE ;
585 // else if ( (strcmp(branch->GetName(), "AliPHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
586 // pidfound = kTRUE ;
589 // if ( phospidfound || pidfound ) {
590 // cerr << "WARNING: AliPHOSPIDv1::Exec -> RecParticles and/or PIDtMaker branch with name "
591 // << taskName.Data() << " already exits" << endl ;
596 // Int_t nevents = (Int_t) gAlice->TreeE()->GetEntries() ;
598 // AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
600 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
601 if(gime->BranchExists("RecParticles") )
603 Int_t nevents = gime->MaxEvent() ; //(Int_t) gAlice->TreeE()->GetEntries() ;
607 for(ievent = 0; ievent < nevents; ievent++){
608 gime->Event(ievent,"R") ;
612 WriteRecParticles(ievent);
614 if(strstr(option,"deb"))
615 PrintRecParticles(option) ;
617 //increment the total number of rec particles per run
618 fRecParticlesInRun += gime->RecParticles(BranchName())->GetEntriesFast() ;
622 if(strstr(option,"tim")){
623 gBenchmark->Stop("PHOSPID");
624 cout << "AliPHOSPID:" << endl ;
625 cout << " took " << gBenchmark->GetCpuTime("PHOSPID") << " seconds for PID "
626 << gBenchmark->GetCpuTime("PHOSPID")/nevents << " seconds per event " << endl ;
632 //____________________________________________________________________________
633 void AliPHOSPIDv1::MakeRecParticles(){
635 // Makes a RecParticle out of a TrackSegment
637 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
638 TObjArray * emcRecPoints = gime->EmcRecPoints() ;
639 TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
640 TClonesArray * trackSegments = gime->TrackSegments() ;
641 if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
642 cerr << "ERROR: AliPHOSPIDv1::MakeRecParticles -> RecPoints or TrackSegments not found ! " << endl ;
645 TClonesArray * recParticles = gime->RecParticles() ;
646 recParticles->Clear();
649 TIter next(trackSegments) ;
650 AliPHOSTrackSegment * ts ;
652 AliPHOSRecParticle * rp ;
653 while ( (ts = (AliPHOSTrackSegment *)next()) ) {
655 new( (*recParticles)[index] ) AliPHOSRecParticle() ;
656 rp = (AliPHOSRecParticle *)recParticles->At(index) ;
657 rp->SetTrackSegment(index) ;
658 rp->SetIndexInList(index) ;
660 AliPHOSEmcRecPoint * emc = 0 ;
661 if(ts->GetEmcIndex()>=0)
662 emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
664 AliPHOSRecPoint * cpv = 0 ;
665 if(ts->GetCpvIndex()>=0)
666 cpv = (AliPHOSRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
668 // Now set type (reconstructed) of the particle
670 // Choose the cluster energy range
672 // YK: check if (emc != 0) !!!
674 cerr << "ERROR: AliPHOSPIDv1::MakeRecParticles -> emc("
675 <<ts->GetEmcIndex()<<") = " <<emc<< endl;
678 Float_t e = emc->GetEnergy() ;
679 Int_t cluster = GetClusterOption(e) ;// Gives value to cluster that defines the energy range parameter to be used in de RCPV, TOF and used in the PCA.
680 if(cluster== -1) continue ;
683 emc->GetElipsAxis(lambda) ;
685 if((lambda[0]>0.01) && (lambda[1]>0.01)){
686 // Looking PCA. Define and calculate the data (X),
687 // introduce in the function
688 // X2P that gives the components (P).
690 Float_t Emaxdtotal = 0. ;
692 if((lambda[0]+lambda[1])!=0) Spher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
694 Emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
698 fX[2] = emc->GetDispersion() ;
700 fX[4] = emc->GetMultiplicity() ;
702 fX[6] = emc->GetCoreEnergy() ;
704 fPrincipal->X2P(fX,fP);
707 fP[0]=-100.0; //We do not accept clusters with
708 fP[1]=-100.0; //one cell as a photon-like
711 Float_t time =emc->GetTime() ;
713 // Loop of Efficiency-Purity (the 3 points of purity or efficiency are taken
714 // into account to set the particle identification)
715 for(Int_t eff_pur = 0; eff_pur < 3 ; eff_pur++){
717 // Looking at the CPV detector. If RCPV greater than CpvEmcDistance, 1st,
718 // 2nd or 3rd bit (depending on the efficiency-purity point )is set to 1 .
720 if(GetDistance(emc, cpv, "R") > (*fParameters)(cluster,eff_pur) )
721 rp->SetPIDBit(eff_pur) ;
723 // Looking the TOF. If TOF smaller than gate, 4th, 5th or 6th
724 // bit (depending on the efficiency-purity point )is set to 1
725 if(time< (*fParameters)(cluster+6,eff_pur)) {
726 rp->SetPIDBit(eff_pur+3) ;
729 //If we are inside the ellipse, 7th, 8th or 9th
730 // bit (depending on the efficiency-purity point )is set to 1
731 if(GetPrincipalSign(fP,eff_pur,e) == 1)
732 rp->SetPIDBit(eff_pur+6) ;
735 //Set momentum, energy and other parameters
736 Float_t encal = GetCalibratedEnergy(e);
737 TVector3 dir = GetMomentumDirection(emc,cpv) ;
739 rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),encal) ;
741 rp->Name(); //If photon sets the particle pdg name to gamma
742 rp->SetProductionVertex(0,0,0,0);
743 rp->SetFirstMother(-1);
744 rp->SetLastMother(-1);
745 rp->SetFirstDaughter(-1);
746 rp->SetLastDaughter(-1);
747 rp->SetPolarisation(0,0,0);
753 //____________________________________________________________________________
754 void AliPHOSPIDv1:: Print()
756 // Print the parameters used for the particle type identification
757 cout << "=============== AliPHOSPID1 ================" << endl ;
758 cout << "Making PID "<< endl ;
759 // cout << " Headers file: " << fHeaderFileName.Data() << endl ;
760 // cout << " RecPoints branch title: " << fRecPointsTitle.Data() << endl ;
761 // cout << " TrackSegments Branch title: " << fTrackSegmentsTitle.Data() << endl ;
762 // cout << " RecParticles Branch title " << fRecParticlesTitle.Data() << endl;
763 cout << " Pricipal analysis file from 0.5 to 100 " << fFileName.Data() << endl;
764 cout << " Name of parameters file "<<fFileNamePar.Data() << endl ;
765 cout << " Matrix of Parameters: 18x4"<<endl;
766 cout << " RCPV 6x3 [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]"<<endl;
767 cout << " TOF 6x3 [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]"<<endl;
768 cout << " PCA 5x4 [5 ellipse parametres and 4 parametres to calculate them: A/Sqrt(E) + B* E + C * E^2 + D]"<<endl;
769 cout << " Energy Calibration 1x3 [3 parametres to calibrate energy: A + B* E + C * E^2]"<<endl;
770 fParameters->Print() ;
771 cout << "============================================" << endl ;
774 //____________________________________________________________________________
775 void AliPHOSPIDv1::WriteRecParticles(Int_t event)
778 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
780 TClonesArray * recParticles = gime->RecParticles() ;
781 recParticles->Expand(recParticles->GetEntriesFast() ) ;
789 sprintf(name,"%s%d", "TreeR",event) ;
790 treeR = dynamic_cast<TTree*>(fSplitFile->Get(name));
793 treeR = gAlice->TreeR();
797 gAlice->MakeTree("R", fSplitFile);
798 treeR = gAlice->TreeR() ;
802 Int_t bufferSize = 32000 ;
803 TBranch * rpBranch = treeR->Branch("PHOSRP",&recParticles,bufferSize);
804 rpBranch->SetTitle(BranchName());
808 Int_t splitlevel = 0 ;
809 AliPHOSPIDv1 * pid = this ;
810 TBranch * pidBranch = treeR->Branch("AliPHOSPID","AliPHOSPIDv1",&pid,bufferSize,splitlevel);
811 pidBranch->SetTitle(BranchName());
816 treeR->AutoSave() ; //Write(0,kOverwrite) ;
817 if(gAlice->TreeR()!=treeR){
822 //____________________________________________________________________________
823 TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * cpv)const
825 // Calculates the momentum direction:
826 // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
827 // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
828 // However because of the poor position resolution of PPSD the direction is always taken as if we were
831 TVector3 dir(0,0,0) ;
833 TVector3 emcglobalpos ;
836 emc->GetGlobalPosition(emcglobalpos, dummy) ;
840 dir.SetZ( -dir.Z() ) ; // why ?
843 //account correction to the position of IP
844 Float_t xo,yo,zo ; //Coordinates of the origin
845 gAlice->Generator()->GetOrigin(xo,yo,zo) ;
846 TVector3 origin(xo,yo,zo);
851 //____________________________________________________________________________
852 void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
854 // Print table of reconstructed particles
856 AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
858 TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
860 cout << "AliPHOSPIDv1: event "<<gAlice->GetEvNumber() << endl ;
861 cout << " found " << recParticles->GetEntriesFast() << " RecParticles " << endl ;
863 if(strstr(option,"all")) { // printing found TS
866 << " Index " << endl ;
869 for (index = 0 ; index < recParticles->GetEntries() ; index++) {
870 AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
872 cout << setw(10) << rp->Name() << " "
873 << setw(5) << rp->GetIndexInList() << " " <<endl;
874 cout << "Type "<< rp->GetType() << endl;
876 cout << "-------------------------------------------" << endl ;