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 // Algorythm class to analyze PHOS events. In this class we demostrate,
20 // how to handle reconstructed objects with AliPHSOIndexToObject.
21 // As an example we propose sulotions for four most frequently used tasks:
22 // DrawRecon(...) - to draw reconstructed objects in the PHOS plane,
23 // very usefull in the debuging
24 // InvarianMass(...) - to calculate "REAL" and "MIXED" photon pairs
25 // invariant mass distributions
26 // EnergyResoluition(...) -\ Energy and position resolutions of the
27 // PositionResolution(...)-/ reconstructed photons
28 // Contamination(...) - calculates contamination of the photon spectrum and
29 // pobability of reconstruction of several primaries as
30 // kGAMMA,kELECTRON etc.
32 // root [0] AliPHOSAnalyze * a = new AliPHOSAnalyze("galice.root")
33 // // set the file you want to analyse
34 // root [1] a->DrawRecon(1,3)
35 // // plot RecObjects, made in event 1, PHOS module 3
36 // root [2] a->DrawRecon(1,3,"PHOSRP","another PID")
37 // // plot RecObjets made in the event 1, PHOS module 3,
38 // // produced in the another reconstruction pass,
39 // // which produced PHOS RecParticles ("PHOSRP") with
40 // // title "another PID".
41 // root [3] a->InvariantMass()
42 // // Calculates "REAL" and "MIXED" invariant mass
43 // // distributions of kGAMMA and (kGAMMA+kNEUTRALEM)
44 // // and APPENDS this to the file "invmass.root"
45 // root [4] a->PositionResolution()
46 // // calculates two dimentional histos: energy of the primary
47 // // photon vs distance betwin incedence point and reconstructed
48 // // poisition. One can analyse the produced file position.root
49 // // with macro PhotonPosition.C
50 // root [5] a->EnergyResolution()
51 // // calculates two dimentional histos: energy of the primary
52 // // photon vs energy of the reconstructed particle. One can
53 // // analyse the produced file energy.root
54 // // with macro PhotonEnergy.C
55 // root [6] a->Contamination()
56 // // fills spectra of primary photons and several kinds of
57 // // reconstructed particles, so that analyzing them one can
58 // // estimate conatmination, efficiency of registration etc.
60 //*-- Author: Dmitri Peressounko (SUBATECH & RRC Kurchatov Institute)
61 //////////////////////////////////////////////////////////////////////////////
64 // --- ROOT system ---
70 #include "TParticle.h"
71 #include "TDatabasePDG.h"
72 #include "TClonesArray.h"
76 // --- Standard library ---
78 // --- AliRoot header files ---
82 #include "AliPHOSGeometry.h"
83 #include "AliPHOSAnalyze.h"
84 #include "AliPHOSDigit.h"
85 #include "AliPHOSSDigitizer.h"
86 #include "AliPHOSEmcRecPoint.h"
87 #include "AliPHOSCpvRecPoint.h"
88 #include "AliPHOSTrackSegment.h"
89 #include "AliPHOSRecParticle.h"
90 #include "AliPHOSLoader.h"
93 ClassImp(AliPHOSAnalyze)
95 //____________________________________________________________________________
96 AliPHOSAnalyze::AliPHOSAnalyze():
97 fCorrection(1.2), //Value calculated for default parameters of reconstruction
102 // default ctor (useless)
105 //____________________________________________________________________________
106 AliPHOSAnalyze::AliPHOSAnalyze(Text_t * fileName):
107 fCorrection(1.05), //Value calculated for default parameters of reconstruction
112 // ctor: analyze events from root file "name"
113 fRunLoader = AliRunLoader::Open(fileName,"AliPHOSAnalyze");
114 if (fRunLoader == 0x0)
116 AliError(Form("Error Loading session"));
120 //____________________________________________________________________________
121 AliPHOSAnalyze::AliPHOSAnalyze(const AliPHOSAnalyze & ana):
129 ( (AliPHOSAnalyze &)ana ).Copy(*this) ;
132 //____________________________________________________________________________
133 AliPHOSAnalyze::~AliPHOSAnalyze()
138 //____________________________________________________________________________
139 void AliPHOSAnalyze::DrawRecon(Int_t Nevent,Int_t Nmod){
140 //Draws pimary particles and reconstructed
141 //digits, RecPoints, RecPartices etc
142 //for event Nevent in the module Nmod.
144 //========== Create ObjectLoader
145 if (fRunLoader == 0x0)
147 AliError(Form("Error Loading session"));
151 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(fRunLoader->GetLoader("PHOSLoader"));
154 AliError(Form("Could not obtain the Loader object !"));
159 if(Nevent >= fRunLoader->GetNumberOfEvents() ) {
160 AliError(Form("There is no event %d only %d events available", Nevent, fRunLoader->GetNumberOfEvents() )) ;
163 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
164 fRunLoader->GetEvent(Nevent);
166 Int_t nx = phosgeom->GetNPhi() ;
167 Int_t nz = phosgeom->GetNZ() ;
168 const Float_t * cri= phosgeom->GetEMCAGeometry()->GetCrystalHalfSize() ;
169 Float_t x = nx*cri[0] ;
170 Float_t z = nz*cri[2] ;
171 Int_t nxCPV = (Int_t) (nx*phosgeom->GetPadSizePhi()/(2.*cri[0])) ;
172 Int_t nzCPV = (Int_t) (nz*phosgeom->GetPadSizeZ()/(2.*cri[2])) ;
174 TH2F * emcDigits = (TH2F*) gROOT->FindObject("emcDigits") ;
176 emcDigits->Delete() ;
177 emcDigits = new TH2F("emcDigits","EMC digits", nx,-x,x,nz,-z,z);
178 TH2F * emcSdigits =(TH2F*) gROOT->FindObject("emcSdigits") ;
180 emcSdigits->Delete() ;
181 emcSdigits = new TH2F("emcSdigits","EMC sdigits", nx,-x,x,nz,-z,z);
182 TH2F * emcRecPoints = (TH2F*)gROOT->FindObject("emcRecPoints") ;
184 emcRecPoints->Delete() ;
185 emcRecPoints = new TH2F("emcRecPoints","EMC RecPoints",nx,-x,x,nz,-z,z);
186 TH2F * cpvSdigits =(TH2F*) gROOT->FindObject("cpvSdigits") ;
188 cpvSdigits->Delete() ;
189 cpvSdigits = new TH2F("cpvSdigits","CPV sdigits", nx,-x,x,nz,-z,z);
190 TH2F * cpvDigits = (TH2F*)gROOT->FindObject("cpvDigits") ;
192 cpvDigits->Delete() ;
193 cpvDigits = new TH2F("cpvDigits","CPV digits", nxCPV,-x,x,nzCPV,-z,z) ;
194 TH2F * cpvRecPoints= (TH2F*)gROOT->FindObject("cpvRecPoints") ;
196 cpvRecPoints->Delete() ;
197 cpvRecPoints = new TH2F("cpvRecPoints","CPV RecPoints", nxCPV,-x,x,nzCPV,-z,z) ;
199 TH2F * phot = (TH2F*)gROOT->FindObject("phot") ;
202 phot = new TH2F("phot","Primary Photon", nx,-x,x,nz,-z,z);
203 TH2F * recPhot = (TH2F*)gROOT->FindObject("recPhot") ;
206 recPhot = new TH2F("recPhot","RecParticles with primary Photon",nx,-x,x,nz,-z,z);
209 Double_t vtx[3]={0.,0.,0.} ;
210 //DP: extract vertex either from Generator or from data
213 //Plot Primary Particles
215 if (fRunLoader->Stack() == 0x0) fRunLoader->LoadKinematics("READ");
218 const TParticle * primary ;
220 for ( iPrimary = 0 ; iPrimary < fRunLoader->Stack()->GetNprimary() ; iPrimary++)
222 primary = fRunLoader->Stack()->Particle(iPrimary);
224 Int_t primaryType = primary->GetPdgCode();
225 // if( (primaryType == 211)||(primaryType == -211)||(primaryType == 2212)||(primaryType == -2212)
226 // ||(primaryType == 11)||(primaryType == -11) ) {
227 // Int_t moduleNumber ;
228 // Double_t primX, primZ ;
229 // phosgeom->ImpactOnEmc(primary->Theta(), primary->Phi(), moduleNumber, primX, primZ) ;
230 // if(moduleNumber==Nmod)
231 // charg->Fill(primZ,primX,primary->Energy()) ;
233 if( primaryType == 22 ) {
235 Double_t primX, primZ ;
236 phosgeom->ImpactOnEmc(vtx,primary->Theta(), primary->Phi(), moduleNumber, primX, primZ) ;
237 if(moduleNumber==Nmod)
238 phot->Fill(primZ,primX,primary->Energy()) ;
241 // if( primaryType == -2112 ) {
242 // Int_t moduleNumber ;
243 // Double_t primX, primZ ;
244 // phosgeom->ImpactOnEmc(primary->Theta(), primary->Phi(), moduleNumber, primX, primZ) ;
245 // if(moduleNumber==Nmod)
246 // nbar->Fill(primZ,primX,primary->Energy()) ;
253 AliPHOSDigit * sdigit ;
254 const TClonesArray * sdigits = gime->SDigits() ;
255 Int_t nsdig[5] = {0,0,0,0,0} ;
257 for(iSDigit = 0; iSDigit < sdigits->GetEntriesFast() ; iSDigit++)
259 sdigit = (AliPHOSDigit *) sdigits->At(iSDigit) ;
261 phosgeom->AbsToRelNumbering(sdigit->GetId(), relid) ;
263 phosgeom->RelPosInModule(relid,xd,zd);
264 Float_t e = sdigit->GetEnergy() ;
265 nsdig[relid[0]-1]++ ;
267 if(relid[1]==0) //EMC
268 emcSdigits->Fill(xd,zd,e) ;
270 cpvSdigits->Fill(xd,zd,e) ;
275 message = "Number of EMC + CPV SDigits per module: \n" ;
276 message += "%d %d %d %d %d\n";
277 AliInfo(Form(message.Data(), nsdig[0], nsdig[1], nsdig[2], nsdig[3], nsdig[4] )) ;
281 AliPHOSDigit * digit ;
282 const TClonesArray * digits = gime->Digits();
284 for(iDigit = 0; iDigit < digits->GetEntriesFast(); iDigit++)
286 digit = (AliPHOSDigit *) digits->At(iDigit) ;
288 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
290 phosgeom->RelPosInModule(relid,xd,zd) ;
291 Float_t e = digit->GetEnergy() ;
293 if(relid[1]==0) //EMC
294 emcDigits->Fill(xd,zd,e) ;
296 cpvDigits->Fill(xd,zd,e) ;
305 TObjArray * emcrp = gime->EmcRecPoints() ;
307 for(irecp = 0; irecp < emcrp->GetEntriesFast() ; irecp ++){
308 AliPHOSEmcRecPoint * emc = (AliPHOSEmcRecPoint *) emcrp->At(irecp) ;
309 if(emc->GetPHOSMod()==Nmod){
310 emc->GetLocalPosition(pos) ;
311 emcRecPoints->Fill(pos.X(),pos.Z(),emc->GetEnergy());
316 TObjArray * cpvrp = gime->CpvRecPoints() ;
318 for(irecp = 0; irecp < cpvrp->GetEntriesFast() ; irecp ++){
319 AliPHOSRecPoint * cpv = (AliPHOSCpvRecPoint *) cpvrp->At(irecp) ;
320 if(cpv->GetPHOSMod()==Nmod){
321 cpv->GetLocalPosition(pos) ;
322 cpvRecPoints->Fill(pos.X(),pos.Z(),cpv->GetEnergy());
328 AliPHOSRecParticle * recParticle ;
330 TClonesArray * rp = gime->RecParticles() ;
331 TClonesArray * ts = gime->TrackSegments() ;
332 if(rp && ts && emcrp) {
333 for(iRecParticle = 0; iRecParticle < rp->GetEntriesFast() ; iRecParticle++ )
335 recParticle = (AliPHOSRecParticle *) rp->At(iRecParticle) ;
336 Int_t moduleNumberRec ;
337 Double_t recX, recZ ;
338 phosgeom->ImpactOnEmc(vtx,recParticle->Theta(), recParticle->Phi(), moduleNumberRec, recX, recZ) ;
339 if(moduleNumberRec == Nmod){
341 Double_t minDistance = 5. ;
342 Int_t closestPrimary = -1 ;
344 //extract list of primaries: it is stored at EMC RecPoints
345 Int_t emcIndex = ((AliPHOSTrackSegment *) ts->At(recParticle->GetPHOSTSIndex()))->GetEmcIndex() ;
346 Int_t numberofprimaries ;
347 Int_t * listofprimaries = ((AliPHOSRecPoint*) emcrp->At(emcIndex))->GetPrimaries(numberofprimaries) ;
349 const TParticle * primPart ;
350 Double_t distance = minDistance ;
352 for ( index = 0 ; index < numberofprimaries ; index++){
353 primPart = fRunLoader->Stack()->Particle(listofprimaries[index]) ;
355 Double_t primX, primZ ;
356 phosgeom->ImpactOnEmc(vtx,primPart->Theta(), primPart->Phi(), moduleNumber, primX, primZ) ;
357 if(moduleNumberRec == moduleNumber)
358 distance = TMath::Sqrt((recX-primX)*(recX-primX)+(recZ-primZ)*(recZ-primZ) ) ;
359 if(minDistance > distance)
361 minDistance = distance ;
362 closestPrimary = listofprimaries[index] ;
366 if(closestPrimary >=0 ){
368 Int_t primaryType = fRunLoader->Stack()->Particle(closestPrimary)->GetPdgCode() ;
371 recPhot->Fill(recZ,recX,recParticle->Energy()) ;
373 // if(primaryType==-2112)
374 // recNbar->Fill(recZ,recX,recParticle->Energy()) ;
381 //Plot made histograms
382 emcSdigits->Draw("box") ;
383 emcDigits->SetLineColor(5) ;
384 emcDigits->Draw("boxsame") ;
385 emcRecPoints->SetLineColor(2) ;
386 emcRecPoints->Draw("boxsame") ;
387 cpvSdigits->SetLineColor(1) ;
388 cpvSdigits->Draw("boxsame") ;
391 //____________________________________________________________________________
392 void AliPHOSAnalyze::Ls(){
393 //lists branches and titles of PHOS-related branches of TreeR, TreeD, TreeS
395 if (fRunLoader == 0x0)
397 AliError(Form("Error Loading session"));
401 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(fRunLoader->GetLoader("PHOSLoader"));
404 AliError(Form("Could not obtain the Loader object !"));
410 TObjArray * branches;
412 if (gime->TreeS() == 0x0)
414 if (gime->LoadSDigits("READ"))
416 AliError(Form("Problems with loading summable digits"));
420 branches = gime->TreeS()->GetListOfBranches() ;
423 message = "TreeS:\n" ;
424 for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
425 TBranch * branch=(TBranch *) branches->At(ibranch) ;
426 if(strstr(branch->GetName(),"PHOS") ){
428 message += branch->GetName() ;
430 message += branch->GetTitle() ;
434 if (gime->TreeD() == 0x0)
436 if (gime->LoadDigits("READ"))
438 AliError(Form("Problems with loading digits"));
443 branches = gime->TreeD()->GetListOfBranches() ;
445 message += "TreeD:\n" ;
446 for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
447 TBranch * branch=(TBranch *) branches->At(ibranch) ;
448 if(strstr(branch->GetName(),"PHOS") ) {
450 message += branch->GetName() ;
452 message += branch->GetTitle() ;
457 if (gime->TreeR() == 0x0)
459 if (gime->LoadRecPoints("READ"))
461 AliError(Form("Problems with loading rec points"));
466 branches = gime->TreeR()->GetListOfBranches() ;
468 message += "TreeR: \n" ;
469 for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
470 TBranch * branch=(TBranch *) branches->At(ibranch) ;
471 if(strstr(branch->GetName(),"PHOS") ) {
473 message += branch->GetName() ;
475 message += branch->GetTitle() ;
479 AliInfo(Form(message.Data())) ;
481 //____________________________________________________________________________
482 void AliPHOSAnalyze::InvariantMass()
484 // Calculates Real and Mixed invariant mass distributions
485 if (fRunLoader == 0x0)
487 AliError(Form("Error Loading session"));
491 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(fRunLoader->GetLoader("PHOSLoader"));
494 AliError(Form("Could not obtain the Loader object !"));
498 gime->LoadRecParticles("READ");
500 Int_t nMixedEvents = 4 ; //# of events used for calculation of 'mixed' distribution
504 TFile * mfile = new TFile("invmass.root","update");
506 //========== Reading /Booking Histograms
508 hRealEM = (TH2D*) mfile->Get("hRealEM") ;
510 hRealEM = new TH2D("hRealEM", "Real for EM particles", 250,0.,1.,40,0.,4.) ;
511 TH2D * hRealPhot = 0 ;
513 hRealPhot = (TH2D*)mfile->Get("hRealPhot");
515 hRealPhot = new TH2D("hRealPhot", "Real for kPhoton particles", 250,0.,1.,40,0.,4.) ;
517 TH2D * hMixedEM = 0 ;
518 hMixedEM = (TH2D*) mfile->Get("hMixedEM") ;
520 hMixedEM = new TH2D("hMixedEM", "Mixed for EM particles", 250,0.,1.,40,0.,4.) ;
522 TH2D * hMixedPhot = 0 ;
523 hMixedPhot = (TH2D*) mfile->Get("hMixedPhot") ;
525 hMixedPhot = new TH2D("hMixedPhot","Mixed for kPhoton particles",250,0.,1.,40,0.,4.) ;
528 //reading event and copyng it to TConesArray of all photons
530 TClonesArray * allRecParticleList = new TClonesArray("AliPHOSRecParticle", 1000) ;
531 Int_t * nRecParticles = new Int_t[nMixedEvents] ; // to mark boundaries of each event in the total list
532 for(Int_t index = 0; index < nMixedEvents; index ++)
533 nRecParticles[index] = 0 ;
534 Int_t iRecPhot = 0 ; // number of EM particles in total list
536 //scan over all events
540 if (fRunLoader->TreeE() == 0x0) fRunLoader->LoadHeader();
543 Int_t maxevent = (Int_t)fRunLoader->TreeE()->GetEntries();
544 // for(event = 0; event < gime->MaxEvent(); event++ ){
548 for(event = 0; event < maxevent; event++ ){
549 fRunLoader->GetEvent(event); //will read only TreeR
551 //copy EM RecParticles to the "total" list
552 const AliPHOSRecParticle * recParticle ;
554 TClonesArray * rp = gime->RecParticles() ;
556 AliError(Form("Can't find RecParticles")) ;
560 for(iRecParticle = 0; iRecParticle < rp->GetEntriesFast(); iRecParticle++ )
562 recParticle = (AliPHOSRecParticle *) rp->At(iRecParticle) ;
563 if((recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST)||
564 (recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMSLOW))
565 new( (*allRecParticleList)[iRecPhot++] ) AliPHOSRecParticle(*recParticle) ;
568 Int_t mevent = event%nMixedEvents ; //event number in the "mixed" cicle
569 nRecParticles[mevent] = iRecPhot-1 ;
571 //check, if it is time to calculate invariant mass?
572 if((mevent == 0) && (event +1 == maxevent)){
574 // if((mevent == 0) && (event +1 == gime->MaxEvent())){
576 //calculate invariant mass:
578 Int_t nCurEvent = 0 ;
580 for(irp1 = 0; irp1 < allRecParticleList->GetEntries()-1; irp1++){
581 AliPHOSRecParticle * rp1 = (AliPHOSRecParticle *)allRecParticleList->At(irp1) ;
583 for(irp2 = irp1+1; irp2 < allRecParticleList->GetEntries(); irp2++){
584 AliPHOSRecParticle * rp2 = (AliPHOSRecParticle *)allRecParticleList->At(irp2) ;
587 invMass = (rp1->Energy()+rp2->Energy())*(rp1->Energy()+rp2->Energy())-
588 (rp1->Px()+rp2->Px())*(rp1->Px()+rp2->Px())-
589 (rp1->Py()+rp2->Py())*(rp1->Py()+rp2->Py())-
590 (rp1->Pz()+rp2->Pz())*(rp1->Pz()+rp2->Pz()) ;
593 invMass = TMath::Sqrt(invMass);
596 pt = TMath::Sqrt((rp1->Px()+rp2->Px() )*( rp1->Px()+rp2->Px() ) +
597 (rp1->Py()+rp2->Py() )*( rp1->Py()+rp2->Py() ) );
599 if(irp1 > nRecParticles[nCurEvent])
602 if(irp2 <= nRecParticles[nCurEvent]){ //'Real' event
603 hRealEM->Fill(invMass,pt);
604 if((rp1->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST)&&
605 (rp2->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST) )
606 hRealPhot->Fill(invMass,pt);
609 hMixedEM->Fill(invMass,pt);
610 if((rp1->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST)&&
611 (rp2->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST) )
612 hMixedPhot->Fill(invMass,pt);
615 } //loop over second rp
616 }//loop over first rp
618 //Make some cleanings
619 for(Int_t index = 0; index < nMixedEvents; index ++)
620 nRecParticles[index] = 0 ;
622 allRecParticleList->Clear() ;
626 delete allRecParticleList ;
631 hRealEM->Write(0,kOverwrite) ;
632 hRealPhot->Write(0,kOverwrite) ;
633 hMixedEM->Write(0,kOverwrite) ;
634 hMixedPhot->Write(0,kOverwrite) ;
639 delete nRecParticles;
643 //____________________________________________________________________________
644 void AliPHOSAnalyze::EnergyResolution()
646 //fills two dimentional histo: energy of primary vs. energy of reconstructed
648 TH2F * hAllEnergy = 0 ; //all reconstructed with primary photon
649 TH2F * hPhotEnergy= 0 ; //kGamma with primary photon
650 TH2F * hEMEnergy = 0 ; //electromagnetic with primary photon
652 //opening file and reading histograms if any
653 TFile * efile = new TFile("energy.root","update");
655 hAllEnergy = (TH2F*)efile->Get("hAllEnergy") ;
657 hAllEnergy = new TH2F("hAllEnergy", "Energy of any RP with primary photon",100, 0., 5., 100, 0., 5.);
659 hPhotEnergy =(TH2F*) efile->Get("hPhotEnergy") ;
661 hPhotEnergy = new TH2F("hPhotEnergy", "Energy of kGAMMA with primary photon",100, 0., 5., 100, 0., 5.);
663 hEMEnergy =(TH2F*) efile->Get("hEMEnergy");
665 hEMEnergy = new TH2F("hEMEnergy", "Energy of EM with primary photon", 100, 0., 5., 100, 0., 5.);
668 if (fRunLoader == 0x0)
670 AliError(Form("Error Loading session"));
674 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(fRunLoader->GetLoader("PHOSLoader"));
677 AliError(Form("Could not obtain the Loader object !"));
682 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
685 Int_t maxevent = (Int_t)fRunLoader->TreeE()->GetEntries();
687 fRunLoader->LoadKinematics("READ");
688 gime->LoadTracks("READ");
690 for ( ievent=0; ievent < maxevent ; ievent++){
692 //read the current event
693 fRunLoader->GetEvent(ievent) ;
695 Double_t vtx[3]={0.,0.,0.} ;
697 const AliPHOSRecParticle * recParticle ;
699 TClonesArray * rp = gime->RecParticles() ;
701 AliError(Form("Event %d, Can't find RecParticles ", ievent)) ;
704 TClonesArray * ts = gime->TrackSegments() ;
706 AliError(Form("Event %d, Can't find TrackSegments", ievent)) ;
709 TObjArray * emcrp = gime->EmcRecPoints() ;
711 AliError(Form("Event %d, Can't find EmcRecPoints")) ;
715 for(iRecParticle = 0; iRecParticle < rp->GetEntriesFast() ;iRecParticle++ ){
716 recParticle = (AliPHOSRecParticle *) rp->At(iRecParticle) ;
718 //find the closest primary
719 Int_t moduleNumberRec ;
720 Double_t recX, recZ ;
721 phosgeom->ImpactOnEmc(vtx,recParticle->Theta(), recParticle->Phi(), moduleNumberRec, recX, recZ) ;
723 Double_t minDistance = 100. ;
724 Int_t closestPrimary = -1 ;
726 //extract list of primaries: it is stored at EMC RecPoints
727 Int_t emcIndex = ((AliPHOSTrackSegment*) ts->At(recParticle->GetPHOSTSIndex()))->GetEmcIndex() ;
728 Int_t numberofprimaries ;
729 Int_t * listofprimaries = ((AliPHOSEmcRecPoint*) emcrp->At(emcIndex))->GetPrimaries(numberofprimaries) ;
732 const TParticle * primary ;
733 Double_t distance = minDistance ;
736 Double_t dZmin = 0. ;
737 for ( index = 0 ; index < numberofprimaries ; index++){
739 primary = fRunLoader->Stack()->Particle(listofprimaries[index]) ;
742 Double_t primX, primZ ;
743 phosgeom->ImpactOnEmc(vtx,primary->Theta(), primary->Phi(), moduleNumber, primX, primZ) ;
744 if(moduleNumberRec == moduleNumber) {
747 distance = TMath::Sqrt(dX*dX + dZ*dZ) ;
748 if(minDistance > distance) {
749 minDistance = distance ;
752 closestPrimary = listofprimaries[index] ;
757 //if found primary, fill histograms
758 if(closestPrimary >=0 ){
759 primary = fRunLoader->Stack()->Particle(closestPrimary) ;
760 if(primary->GetPdgCode() == 22){
761 hAllEnergy->Fill(primary->Energy(), recParticle->Energy()) ;
762 if(recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST){
763 hPhotEnergy->Fill(primary->Energy(), recParticle->Energy() ) ;
764 hEMEnergy->Fill(primary->Energy(), recParticle->Energy() ) ;
767 if(recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMSLOW)
768 hEMEnergy->Fill(primary->Energy(), recParticle->Energy() ) ;
774 //write filled histograms
776 hAllEnergy->Write(0,kOverwrite) ;
777 hPhotEnergy->Write(0,kOverwrite) ;
778 hEMEnergy->Write(0,kOverwrite) ;
784 //____________________________________________________________________________
785 void AliPHOSAnalyze::PositionResolution()
787 //fills two dimentional histo: energy vs. primary - reconstructed distance
791 TH2F * hAllPosition = 0; // Position of any RP with primary photon
792 TH2F * hPhotPosition = 0; // Position of kGAMMA with primary photon
793 TH2F * hEMPosition = 0; // Position of EM with primary photon
795 TH1F * hAllPositionX = 0; // X-Position Resolution of photons with photon primary
796 TH1F * hAllPositionZ = 0; // Z-Position Resolution of photons with photon primary
799 //opening file and reading histograms if any
800 TFile * pfile = new TFile("position.root","update");
802 hAllPosition = (TH2F*)pfile->Get("hAllPosition");
803 if(hAllPosition == 0)
804 hAllPosition = new TH2F("hAllPosition",
805 "Position of any RP with primary photon",100, 0., 5., 100, 0., 5.);
806 hPhotPosition= (TH2F*)pfile->Get("hPhotPosition");
807 if(hPhotPosition == 0)
808 hPhotPosition = new TH2F("hPhotPosition",
809 "Position of kGAMMA with primary photon",100, 0., 5., 100, 0., 5.);
810 hEMPosition= (TH2F*)pfile->Get("hEMPosition") ;
812 hEMPosition = new TH2F("hEMPosition",
813 "Position of EM with primary photon", 100, 0., 5., 100, 0., 5.);
814 hAllPositionX = (TH1F*)pfile->Get("hAllPositionX") ;
815 if(hAllPositionX == 0)
816 hAllPositionX = new TH1F("hAllPositionX",
817 "Delta X of any RP with primary photon",100, -2., 2.);
818 hAllPositionZ =(TH1F*) pfile->Get("hAllPositionZ") ;
819 if(hAllPositionZ == 0)
820 hAllPositionZ = new TH1F("hAllPositionZ",
821 "Delta X of any RP with primary photon",100, -2., 2.);
823 if (fRunLoader == 0x0)
825 AliError(Form("Error Loading session"));
829 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(fRunLoader->GetLoader("PHOSLoader"));
832 AliError(Form("Could not obtain the Loader object !"));
836 if (fRunLoader->TreeE() == 0x0) fRunLoader->LoadHeader();
838 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
841 Int_t maxevent = (Int_t)fRunLoader->TreeE()->GetEntries() ;
842 for ( ievent=0; ievent < maxevent ; ievent++){
844 //read the current event
845 fRunLoader->GetEvent(ievent) ;
847 //DP:Extract vertex position
848 Double_t vtx[3]={0.,0.,0.} ;
850 TClonesArray * rp = gime->RecParticles() ;
852 AliError(Form("Event %d, Can't find RecParticles", ievent)) ;
855 TClonesArray * ts = gime->TrackSegments() ;
857 AliError(Form("Event %d, Can't find TrackSegments", ievent)) ;
860 TObjArray * emcrp = gime->EmcRecPoints() ;
862 AliError(Form("Event %d, Can't find EmcRecPoints", ievent)) ;
867 const AliPHOSRecParticle * recParticle ;
869 for(iRecParticle = 0; iRecParticle < rp->GetEntriesFast(); iRecParticle++ ){
870 recParticle = (AliPHOSRecParticle *) rp->At(iRecParticle) ;
872 //find the closest primary
873 Int_t moduleNumberRec ;
874 Double_t recX, recZ ;
875 phosgeom->ImpactOnEmc(vtx,recParticle->Theta(), recParticle->Phi(), moduleNumberRec, recX, recZ) ;
877 Double_t minDistance = 100. ;
878 Int_t closestPrimary = -1 ;
880 //extract list of primaries: it is stored at EMC RecPoints
881 Int_t emcIndex = ((AliPHOSTrackSegment*) ts->At(recParticle->GetPHOSTSIndex()))->GetEmcIndex() ;
882 Int_t numberofprimaries ;
883 Int_t * listofprimaries = ((AliPHOSEmcRecPoint *) emcrp->At(emcIndex))->GetPrimaries(numberofprimaries) ;
886 const TParticle * primary ;
887 Double_t distance = minDistance ;
888 Double_t dX = 1000; // incredible number
889 Double_t dZ = 1000; // for the case if no primary will be found
891 Double_t dZmin = 0. ;
892 for ( index = 0 ; index < numberofprimaries ; index++){
893 primary = fRunLoader->Stack()->Particle(listofprimaries[index]) ;
895 Double_t primX, primZ ;
896 phosgeom->ImpactOnEmc(vtx,primary->Theta(), primary->Phi(), moduleNumber, primX, primZ) ;
897 if(moduleNumberRec == moduleNumber) {
900 distance = TMath::Sqrt(dX*dX + dZ*dZ) ;
901 if(minDistance > distance) {
902 minDistance = distance ;
905 closestPrimary = listofprimaries[index] ;
910 //if found primary, fill histograms
911 if(closestPrimary >=0 ){
912 primary = fRunLoader->Stack()->Particle(closestPrimary) ;
913 if(primary->GetPdgCode() == 22){
914 hAllPosition->Fill(primary->Energy(), minDistance) ;
915 hAllPositionX->Fill(primary->Energy(), dX) ;
916 hAllPositionZ->Fill(primary->Energy(), dZ) ;
917 if(recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST){
918 hPhotPosition->Fill(primary->Energy(), minDistance ) ;
919 hEMPosition->Fill(primary->Energy(), minDistance ) ;
922 if(recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMSLOW)
923 hEMPosition->Fill(primary->Energy(), minDistance ) ;
929 //Write output histgrams
931 hAllPosition->Write(0,kOverwrite) ;
932 hAllPositionX->Write(0,kOverwrite) ;
933 hAllPositionZ->Write(0,kOverwrite) ;
934 hPhotPosition->Write(0,kOverwrite) ;
935 hEMPosition->Write(0,kOverwrite) ;
942 //____________________________________________________________________________
943 void AliPHOSAnalyze::Contamination(){
944 // fills spectra of primary photons and several kinds of
945 // reconstructed particles, so that analyzing them one can
946 // estimate conatmination, efficiency of registration etc.
948 //define several general histograms
949 TH1F * hPrimary = 0; //spectrum (P_t distribution) of primary photons
950 TH1F * hAllRP = 0; //spectrum of all RecParticles in PHOS
951 TH1F * hPhot = 0; //spectrum of kGAMMA RecParticles
952 TH1F * hShape = 0; //spectrum of all EM RecParticles
953 TH1F * hVeto = 0; //spectrum of all neutral RecParticles
955 //Now separate histograms in accoradance with primary
957 TH1F * hPhotReg = 0; //Registeres as photon
958 TH1F * hPhotEM = 0; //Registered as EM
961 TH1F * hNReg = 0; //Registeres as photon
962 TH1F * hNEM = 0; //Registered as EM
965 TH1F * hNBarReg = 0; //Registeres as photon
966 TH1F * hNBarEM = 0; //Registered as EM
968 //primary - charged hadron (pBar excluded)
969 TH1F * hChargedReg = 0; //Registeres as photon
970 TH1F * hChargedEM = 0; //Registered as EM
973 TH1F * hPbarReg = 0; //Registeres as photon
974 TH1F * hPbarEM = 0; //Registered as EM
977 //Reading histograms from the file
978 TFile * cfile = new TFile("contamination.root","update") ;
980 //read general histograms
981 hPrimary = (TH1F*) cfile->Get("hPrimary") ;
983 hPrimary= new TH1F("hPrimary", "Primary photon spectrum", 100, 0., 5.);
984 hAllRP = (TH1F*)cfile->Get("hAllRP") ;
986 hAllRP = new TH1F("hAllRP","All Reconstructed particles", 100, 0., 5.);
987 hPhot = (TH1F*)cfile->Get("hPhot") ;
989 hPhot = new TH1F("hPhot","All kGAMMA RecParticles",100, 0., 5.);
990 hShape = (TH1F*) cfile->Get("hShape") ;
992 hShape = new TH1F("hShape","All particles with EM shower",100, 0., 5.);
993 hVeto= (TH1F*)cfile->Get("hVeto") ;
995 hVeto = new TH1F("hVeto", "All uncharged particles", 100, 0., 5.);
999 hPhotReg = (TH1F*)cfile->Get("hPhotReg");
1001 hPhotReg = new TH1F("hPhotReg","Photon registered as photon",100, 0., 5.);
1002 hPhotEM =(TH1F*)cfile->Get("hPhotEM");
1004 hPhotEM = new TH1F("hPhotEM", "Photon registered as EM", 100, 0., 5.);
1007 hNReg = (TH1F*)cfile->Get("hNReg");
1009 hNReg = new TH1F("hNReg", "N registered as photon", 100, 0., 5.);
1010 hNEM = (TH1F*)cfile->Get("hNEM");
1012 hNEM = new TH1F("hNEM", "N registered as EM", 100, 0., 5.);
1015 hNBarReg =(TH1F*)cfile->Get("hNBarReg");
1017 hNBarReg = new TH1F("hNBarReg", "NBar registered as photon", 100, 0., 5.);
1018 hNBarEM =(TH1F*)cfile->Get("hNBarEM");
1020 hNBarEM = new TH1F("hNBarEM", "NBar registered as EM", 100, 0., 5.);
1022 //primary - charged hadron (pBar excluded)
1023 hChargedReg = (TH1F*)cfile->Get("hChargedReg");
1025 hChargedReg= new TH1F("hChargedReg", "Charged hadron registered as photon",100, 0., 5.);
1026 hChargedEM = (TH1F*)cfile->Get("hChargedEM");
1028 hChargedEM= new TH1F("hChargedEM","Charged registered as EM",100, 0., 5.);
1031 hPbarReg = (TH1F*)cfile->Get("hPbarReg");
1033 hPbarReg= new TH1F("hPbarReg", "pBar registered as photon",100, 0., 5.);
1034 hPbarEM = (TH1F*)cfile->Get("hPbarEM");
1036 hPbarEM= new TH1F("hPbarEM","Pbar registered as EM",100, 0., 5.);
1039 //Now make some initializations
1041 Int_t counter[8][5] ; //# of registered particles
1043 for(i1 = 0; i1<8; i1++)
1044 for(i2 = 0; i2<5; i2++)
1045 counter[i1][i2] = 0 ;
1049 if (fRunLoader == 0x0)
1051 AliError(Form("Error Loading session"));
1055 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(fRunLoader->GetLoader("PHOSLoader"));
1058 AliError(Form("Could not obtain the Loader object !"));
1062 if (fRunLoader->TreeE() == 0x0) fRunLoader->LoadHeader();
1063 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
1066 Int_t maxevent = (Int_t)fRunLoader->TreeE()->GetEntries() ;
1067 for ( ievent=0; ievent < maxevent ; ievent++){
1069 fRunLoader->GetEvent(ievent) ;
1071 //DP:Extract vertex position
1072 Double_t vtx[3]={0.,0.,0.} ;
1074 TClonesArray * rp = gime->RecParticles() ;
1076 AliError(Form("Event %d, Can't find RecParticles", ievent)) ;
1079 TClonesArray * ts = gime->TrackSegments() ;
1081 AliError(Form("Event %d, Can't find TrackSegments", ievent)) ;
1084 TObjArray * emcrp = gime->EmcRecPoints() ;
1086 AliError(Form("Event %d, Can't find EmcRecPoints", ievent)) ;
1091 //=========== Make spectrum of the primary photons
1092 const TParticle * primary ;
1094 for( iPrimary = 0 ; iPrimary < fRunLoader->Stack()->GetNprimary() ; iPrimary++){
1095 primary = fRunLoader->Stack()->Particle(iPrimary) ;
1096 Int_t primaryType = primary->GetPdgCode() ;
1097 if( primaryType == 22 ) {
1098 //check, if photons folls onto PHOS
1099 Int_t moduleNumber ;
1100 Double_t primX, primZ ;
1101 phosgeom->ImpactOnEmc(vtx,primary->Theta(), primary->Phi(), moduleNumber, primX, primZ) ;
1103 hPrimary->Fill(primary->Energy()) ;
1109 //========== Now scan over RecParticles
1110 const AliPHOSRecParticle * recParticle ;
1111 Int_t iRecParticle ;
1112 for(iRecParticle = 0; iRecParticle < rp->GetEntriesFast(); iRecParticle++ ){
1113 recParticle = (AliPHOSRecParticle *) rp->At(iRecParticle) ;
1114 //fill histo spectrum of all RecParticles
1115 hAllRP->Fill(CorrectedEnergy(recParticle->Energy())) ;
1117 //==========find the closest primary
1118 Int_t moduleNumberRec ;
1119 Double_t recX, recZ ;
1120 phosgeom->ImpactOnEmc(vtx,recParticle->Theta(), recParticle->Phi(), moduleNumberRec, recX, recZ) ;
1122 Double_t minDistance = 100. ;
1123 Int_t closestPrimary = -1 ;
1125 //extract list of primaries: it is stored at EMC RecPoints
1126 Int_t emcIndex = ((AliPHOSTrackSegment *) ts->At(recParticle->GetPHOSTSIndex()))->GetEmcIndex() ;
1127 Int_t numberofprimaries ;
1128 Int_t * listofprimaries = ((AliPHOSEmcRecPoint *) emcrp->At(emcIndex))->GetPrimaries(numberofprimaries) ;
1130 Double_t distance = minDistance ;
1132 Double_t dXmin = 0.;
1133 Double_t dZmin = 0. ;
1134 for ( index = 0 ; index < numberofprimaries ; index++){
1135 primary = fRunLoader->Stack()->Particle(listofprimaries[index]) ;
1136 Int_t moduleNumber ;
1137 Double_t primX, primZ ;
1138 phosgeom->ImpactOnEmc(vtx,primary->Theta(), primary->Phi(), moduleNumber, primX, primZ) ;
1139 if(moduleNumberRec == moduleNumber) {
1142 distance = TMath::Sqrt(dX*dX + dZ*dZ) ;
1143 if(minDistance > distance) {
1144 minDistance = distance ;
1147 closestPrimary = listofprimaries[index] ;
1152 //===========define the "type" of closest primary
1153 if(closestPrimary >=0 ){
1154 Int_t primaryCode = -1;
1155 primary = fRunLoader->Stack()->Particle(closestPrimary) ;
1156 Int_t primaryType = primary->GetPdgCode() ;
1157 if(primaryType == 22) // photon ?
1160 if(primaryType == 2112) // neutron
1163 if(primaryType == -2112) // Anti neutron
1166 if(primaryType == -2122) //Anti proton
1169 TParticle tempo(*primary) ;
1170 if(tempo.GetPDG()->Charge())
1174 //==========Now look at the type of RecParticle
1175 Float_t energy = CorrectedEnergy(recParticle->Energy()) ;
1176 if(recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST){
1177 hPhot->Fill(energy ) ;
1178 switch(primaryCode){
1180 hPhotReg->Fill(energy ) ;
1183 hNReg->Fill(energy ) ;
1186 hNBarReg->Fill(energy ) ;
1189 hChargedReg->Fill(energy ) ;
1192 hPbarReg->Fill(energy ) ;
1198 if((recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST)||
1199 (recParticle->GetType() == AliPHOSFastRecParticle::kCHARGEDEMFAST)||
1200 (recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMSLOW)||
1201 (recParticle->GetType() == AliPHOSFastRecParticle::kCHARGEDEMSLOW) ){ //with EM shower
1202 hShape->Fill(energy ) ;
1203 switch(primaryCode){
1205 hPhotEM->Fill(energy ) ;
1208 hNEM->Fill(energy ) ;
1211 hNBarEM->Fill(energy ) ;
1214 hChargedEM->Fill(energy ) ;
1217 hPbarEM->Fill(energy ) ;
1224 if((recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMFAST)||
1225 (recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALHAFAST) ||
1226 (recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALEMSLOW) ||
1227 (recParticle->GetType() == AliPHOSFastRecParticle::kNEUTRALHASLOW) ) //nuetral
1228 hVeto->Fill(energy ) ;
1230 //fill number of primaries identified as ...
1231 if(primaryCode >= 0) // Primary code defined
1232 counter[recParticle->GetType()][primaryCode]++ ;
1236 } // no closest primary found
1240 //=================== SaveHistograms
1242 hPrimary->Write(0,kOverwrite);
1243 hAllRP->Write(0,kOverwrite);
1244 hPhot->Write(0,kOverwrite);
1245 hShape->Write(0,kOverwrite);
1246 hVeto->Write(0,kOverwrite);
1247 hPhotReg->Write(0,kOverwrite);
1248 hPhotEM->Write(0,kOverwrite);
1249 hNReg ->Write(0,kOverwrite);
1250 hNEM ->Write(0,kOverwrite);
1251 hNBarReg ->Write(0,kOverwrite);
1252 hNBarEM ->Write(0,kOverwrite);
1253 hChargedReg ->Write(0,kOverwrite);
1254 hChargedEM ->Write(0,kOverwrite);
1255 hPbarReg ->Write(0,kOverwrite);
1256 hPbarEM ->Write(0,kOverwrite);
1258 cfile->Write(0,kOverwrite);
1264 maxevent = (Int_t)AliRunLoader::Instance()->TreeE()->GetEntries() ;
1267 message = "Resolutions: Analyzed %d event(s)\n" ;
1269 message += " Primary: Photon Neutron Antineutron Charged hadron AntiProton\n" ;
1270 message += "--------------------------------------------------------------------------------\n" ;
1271 message += " kGAMMA: " ;
1272 message += "%d %d %d %d %d\n" ;
1273 message += " kGAMMAHA: " ;
1274 message += "%d %d %d %d %d\n" ;
1275 message += " kNEUTRALEM: " ;
1276 message += "%d %d %d %d %d\n" ;
1277 message += " kNEUTRALHA: " ;
1278 message += "%d %d %d %d %d\n" ;
1279 message += " kABSURDEM: ";
1280 message += "%d %d %d %d %d\n" ;
1281 message += " kABSURDHA: " ;
1282 message += "%d %d %d %d %d\n" ;
1283 message += " kELECTRON: " ;
1284 message += "%d %d %d %d %d\n" ;
1285 message += " kCHARGEDHA: " ;
1286 message += "%d %d %d %d %d\n" ;
1288 message += "--------------------------------------------------------------------------------" ;
1291 Int_t totalInd = 0 ;
1292 for(i1 = 0; i1<8; i1++)
1293 for(i2 = 0; i2<5; i2++)
1294 totalInd+=counter[i1][i2] ;
1295 message += "Indentified particles: %d" ;
1297 AliInfo(Form(message.Data(), maxevent,
1298 counter[2][0], counter[2][1], counter[2][2], counter[2][3], counter[2][4],
1299 counter[3][0], counter[3][1], counter[3][2], counter[3][3], counter[3][4],
1300 counter[0][0], counter[0][1], counter[0][2], counter[0][3], counter[0][4],
1301 counter[1][0], counter[1][1], counter[1][2], counter[1][3], counter[1][4],
1302 counter[4][0], counter[4][1], counter[4][2], counter[4][3], counter[4][4],
1303 counter[5][0], counter[5][1], counter[5][2], counter[5][3], counter[5][4],
1304 counter[6][0], counter[6][1], counter[6][2], counter[6][3], counter[6][4],
1305 counter[7][0], counter[7][1], counter[7][2], counter[7][3], counter[7][4],