TOF/AliTOFT0.cxx

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  15
  16 /* $Id$ */
  17
  18 //_________________________________________________________________________
  19 //
  20 // This is a TTask that made the calculation of the Time zero using TOF.
  21 // Description: The algorithm used to calculate the time zero of
  22 // interaction using TOF detector is the following.
  23 // We select in the MonteCarlo some primary particles - or tracks in
  24 // the following - that strike the TOF detector (the larger part are
  25 // pions, kaons or protons).
  26 // We choose a set of 10 selected tracks, for each track You have the
  27 // length of the track when the TOF is reached (a standard TOF hit
  28 // does not contain this additional information, this is the reason
  29 // why we implemented a new time zero dedicated TOF hit class
  30 // AliTOFhitT0; in order to store this type of hit You have to use the
  31 // AliTOFv4T0 as TOF class in Your Config.C. In AliTOFv4T0 the
  32 // StepManager was modified in order to fill the TOF hit branch with
  33 // this type of hits; in fact the AliTOF::AddT0Hit is called rather
  34 // that the usual AliTOF::AddHit), the momentum at generation (from
  35 // TreeK) and the time of flight given by the TOF detector.
  36 // (Observe that the ctor of the AliTOF class, when the AliTOFv4T0
  37 // class is used, is called with the "tzero" option: it is in order
  38 // create the fHits TClonesArray filled with AliTOFhitT0 objects,
  39 // rather than with normal AliTOFhit)
  40 // Then Momentum and time of flight for each track are smeared
  41 // according to known experimental resolution (all sources of error
  42 // have been token into account).
  43 // Let consider now only one set of 10 tracks (the algorithm is the
  44 // same for all sets).
  45 // Assuming the (mass) hypothesis that each track can be AUT a pion,
  46 // AUT a kaon, AUT a proton, we consider all the 3 at 10 possible
  47 // cases.
  48 // For each track in each (mass) configuration
  49 // (a configuration can be
  50 // e.g. pion/pion/kaon/proton/pion/proton/kaon/kaon/pion/pion)
  51 // we calculate the time zero (we know in fact the velocity of the
  52 // track after the assumption about its mass, the time of flight given
  53 // by the TOF, and the corresponding path travelled till the TOF
  54 // detector). Then for each mass configuration we have 10 time zero
  55 // and we can calculate the ChiSquare for the current configuration
  56 // using the weighted mean over all 10 time zero.
  57 // We call the best assignment the mass configuration that gives the
  58 // minimum value of the ChiSquare.
  59 // We plot the weighted mean over all 10 time zero for the best
  60 // assignment, the ChiSquare for the best assignment and the
  61 // corresponding confidence level.
  62 // The strong assumption is the MC selection of primary particles. It
  63 // will be introduced in the future also some more realistic
  64 // simulation about this point.
  65 //
  66 // Use case:
  67 // root [0] AliTOFT0 * tzero = new AliTOFT0("galice.root")
  68 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
  69 // root [1] tzero->ExecuteTask()
  70 // root [2] tzero->ExecuteTask("tim")
  71 //             // available parameters:
  72 //             tim - print benchmarking information
  73 //             all - print usefull informations about the number of
  74 //                   misidentified tracks and a comparison about the
  75 //                   true configuration (known from MC) and the best
  76 //                   assignment
  77 //
  78 //-- Author: F. Pierella
  79 //
  80 //_________________________________________________________________________
  81
  82 #include <TCanvas.h>
  83 #include <TClonesArray.h>
  84 #include <TFile.h>
  85 #include <TFolder.h>
  86 #include <TFrame.h>
  87 #include <TH1.h>
  88 #include <TParticle.h>
  89 #include <TBenchmark.h>
  90 #include <TTask.h>
  91 #include <TTree.h>
  92 #include <TRandom.h>
  93 #include <TROOT.h>
  94
  95 #include "AliMC.h"
  96 #include "AliRun.h"
  97
  98 #include "AliTOFhitT0.h"
  99 #include "AliTOFT0.h"
 100 #include "AliTOF.h"
 101
 102 ClassImp(AliTOFT0)
 103
 104 //____________________________________________________________________________
 105 AliTOFT0::AliTOFT0():
 106   TTask("AliTOFT0",""),
 107   fNevents(0),
 108   fTimeResolution(0),
 109   fLowerMomBound(0),
 110   fUpperMomBound(0),
 111   fT0File(""),
 112   fHeadersFile("")
 113 {
 114   // ctor
 115 }
 116
 117 //____________________________________________________________________________
 118 AliTOFT0::AliTOFT0(char* headerFile, Int_t nEvents):
 119   TTask("AliTOFT0",""),
 120   fNevents(nEvents),
 121   fTimeResolution(1.2e-10),
 122   fLowerMomBound(1.5),
 123   fUpperMomBound(2.),
 124   fT0File(""),
 125   fHeadersFile(headerFile)
 126 {
 127   //
 128   //
 129   //
 130
 131   //fNevents=nEvents ; // Number of events for which calculate the T0,
 132                      // default 0: it means all evens in current file
 133   //fLowerMomBound=1.5; // [GeV/c] default value
 134   //fUpperMomBound=2. ; // [GeV/c] default value
 135   //fTimeResolution   = 1.2e-10; // 120 ps by default
 136   //fHeadersFile = headerFile ;
 137
 138   TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
 139
 140   //File was not opened yet
 141   if(file == 0){
 142     if(fHeadersFile.Contains("rfio"))
 143       file =    TFile::Open(fHeadersFile,"update") ;
 144     else
 145       file = new TFile(fHeadersFile.Data(),"update") ;
 146     gAlice = (AliRun *) file->Get("gAlice") ;
 147   }
 148
 149   // add Task to //root/Tasks folder
 150   TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ;
 151   roottasks->Add(this) ;
 152 }
 153
 154 //____________________________________________________________________________
 155 AliTOFT0::AliTOFT0(const AliTOFT0 & tzero):
 156   TTask("AliTOFT0",""),
 157   fNevents(0),
 158   fTimeResolution(0),
 159   fLowerMomBound(0),
 160   fUpperMomBound(0),
 161   fT0File(""),
 162   fHeadersFile("")
 163 {
 164   // copy ctr
 165
 166 ( (AliTOFT0 &)tzero ).Copy(*this);
 167 }
 168
 169 //____________________________________________________________________________
 170   AliTOFT0::~AliTOFT0()
 171 {
 172   // dtor
 173 }
 174
 175 //____________________________________________________________________________
 176 void AliTOFT0::Exec(Option_t *option)
 177 {
 178   //
 179   // calculate T0 distribution for all events using chisquare
 180   //
 181   Int_t ngood=0;
 182   Int_t nmisidentified=0;
 183   Int_t nmisidentified0=0;
 184   Int_t nmisidentified1=0;
 185   Int_t nmisidentified2=0;
 186   Int_t nmisidentified3=0;
 187   Int_t nmisidentified4=0;
 188   Int_t nmisidentified5=0;
 189   Int_t nmisidentified6=0;
 190   Int_t nmisidentified7=0;
 191   Int_t nmisidentified8=0;
 192   Int_t nmisidentified9=0;
 193   Int_t ipartold = -1;
 194   Int_t ipart;
 195   Int_t selected=0;
 196   Int_t istop=0;
 197   Float_t timeresolutioninns=fTimeResolution*(1.e+9); // convert in [ns]
 198   const Int_t kUPDATE = 5; // for visual option
 199   Int_t itimes=0;
 200   TCanvas* c1=0;
 201   TCanvas* c2=0;
 202   TCanvas* c3=0;
 203
 204   if(strstr(option,"visual")){
 205     // Create a new canvas.
 206     //c1 = new TCanvas("c1","Dynamic Visual Filling of time zero histo",10,10,500,500);
 207     c1 = new TCanvas("c1","Dynamic Visual Filling of time zero histo",10,10,370,370);
 208     c1->SetFillColor(35);
 209     c1->GetFrame()->SetFillColor(21);
 210     c1->GetFrame()->SetBorderSize(6);
 211     c1->GetFrame()->SetBorderMode(-1);
 212
 213     //c2 = new TCanvas("c2","Dynamic Visual Filling of chisquare histo",550,10,500,500);
 214     c2 = new TCanvas("c2","Dynamic Visual Filling of chisquare histo",380,10,370,370);
 215     c2->SetFillColor(35);
 216     c2->GetFrame()->SetFillColor(21);
 217     c2->GetFrame()->SetBorderSize(6);
 218     c2->GetFrame()->SetBorderMode(-1);
 219
 220     //c3 = new TCanvas("c3","Dynamic Visual Filling of confidence level histo",280,550,500,500);
 221     c3 = new TCanvas("c3","Dynamic Visual Filling of confidence level histo",760,10,370,370);
 222     c3->SetFillColor(35);
 223     c3->GetFrame()->SetFillColor(21);
 224     c3->GetFrame()->SetBorderSize(6);
 225     c3->GetFrame()->SetBorderMode(-1);
 226   }
 227
 228   if(strstr(option,"tim") || strstr(option,"all"))
 229     gBenchmark->Start("TOFT0");
 230
 231   TH1F *htzerobest= new TH1F("htzerobest","T0 for best assignment",200,-1.,1.);
 232   TH1F* hchibest  = new TH1F("hchibest","ChiSquare Min Distribution",80,0.,40.);
 233   TH1F* hchibestconflevel  = new TH1F("hchibestconflevel","ChiSquare Min Confidence Level",10,0.,1.);
 234
 235   // setting histo colors
 236   if(strstr(option,"visual")){
 237     htzerobest->SetFillColor(48);
 238     hchibest->SetFillColor(50);
 239     hchibestconflevel->SetFillColor(52);
 240   }
 241
 242   Int_t   assparticle[10]={3,3,3,3,3,3,3,3,3,3};
 243   Int_t   truparticle[10]={3,3,3,3,3,3,3,3,3,3};
 244   Float_t t0best=999.;
 245   Float_t timeofflight[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
 246   Float_t momentum[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
 247   Float_t timezero[10];
 248   Float_t weightedtimezero[10];
 249   Float_t beta[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
 250   Float_t sqMomError[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
 251   Float_t sqTrackError[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
 252   Float_t massarray[3]={0.13957,0.493677,0.9382723};
 253   Float_t dummychisquare=0.;
 254   Float_t chisquare=999.;
 255   Float_t tracktoflen[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
 256
 257   AliTOF *detTOF = (AliTOF *) gAlice->GetDetector ("TOF");
 258
 259   if (!detTOF) {
 260     Error("AliTOFT0","TOF not found");
 261     return;
 262   }
 263
 264   if(strstr(option,"all")){
 265     AliInfo(Form("Selecting primary tracks with momentum between %d GeV/c and %d GeV/c",  fLowerMomBound, fUpperMomBound));
 266     AliInfo("Memorandum: 0 means PION | 1 means KAON | 2 means PROTON")
 267   }
 268
 269   if (fNevents == 0) fNevents = (Int_t) gAlice->TreeE()->GetEntries();
 270
 271   for (Int_t ievent = 0; ievent < fNevents; ievent++) {
 272     gAlice->GetEvent(ievent);
 273     TTree *hitTree = detTOF->TreeH ();
 274     if (!hitTree)
 275       return;
 276     TParticle*    particle;
 277     AliTOFhitT0*  tofHit;
 278     TClonesArray* tofHits = detTOF->Hits();
 279
 280     Int_t lasttrack=-1;
 281     Int_t nset=0;
 282
 283     hitTree->SetBranchStatus("*",0); // switch off all branches
 284     hitTree->SetBranchStatus("TOF*",1); // switch on only TOF
 285
 286     // Start loop on primary tracks in the hits containers
 287
 288     Int_t ntracks = static_cast<Int_t>(hitTree->GetEntries());
 289     for (Int_t track = 0; track < ntracks; track++)
 290     {
 291       if(nset>=5) break; // check on the number of set analyzed
 292
 293       gAlice->ResetHits();
 294       hitTree->GetEvent(track);
 295
 296       AliMC *mcApplication = (AliMC*)gAlice->GetMCApp();
 297
 298       particle = mcApplication->Particle(track);
 299       Int_t nhits = tofHits->GetEntriesFast();
 300
 301       for (Int_t hit = 0; hit < nhits; hit++)
 302       {
 303         tofHit = (AliTOFhitT0 *) tofHits->UncheckedAt(hit);
 304         ipart    = tofHit->GetTrack();
 305         // check to discard the case when the same particle is selected more than one
 306         // time
 307
 308         if (ipart != ipartold){
 309
 310           particle = (TParticle*)gAlice->GetMCApp()->Particle(ipart);
 311
 312           Float_t idealtime=tofHit->GetTof();
 313           //       Float_t time=idealtime;
 314           Float_t time   = gRandom->Gaus(idealtime, fTimeResolution);
 315           Float_t toflen=tofHit->GetLen();
 316           toflen=toflen/100.; // toflen given in m
 317           Int_t pdg   = particle->GetPdgCode();
 318           Int_t abspdg   =TMath::Abs(pdg);
 319           Float_t idealmom  = particle->P();
 320           Float_t momres=idealmom*0.025; // 2.5% res token into account for all momenta
 321           Float_t mom =gRandom->Gaus(idealmom,momres);
 322
 323           Bool_t isgoodpart=(abspdg==211 || abspdg==2212 || abspdg==321);
 324
 325           time*=1.E+9; // tof given in nanoseconds
 326           if (particle->GetFirstMother() < 0 && isgoodpart && mom<=fUpperMomBound && mom>=fLowerMomBound){
 327             selected+=1;
 328             istop=selected;
 329             if(istop>10) break;
 330             Int_t index=selected-1;
 331             timeofflight[index]=time;
 332             tracktoflen[index]=toflen;
 333             momentum[index]=mom;
 334             //AliInfo(Form(" %d  %d  %d ", timeofflight[index], tracktoflen[index], momentum[index]));
 335             switch (abspdg) {
 336             case 211:
 337               truparticle[index]=0;
 338               break ;
 339             case 321:
 340               truparticle[index]=1;
 341               break ;
 342             case 2212:
 343               truparticle[index]=2;
 344               break ;
 345             }
 346
 347           }
 348           ipartold = ipart;
 349
 350           if(istop==10){ // start analysis on current set
 351             nset+=1;
 352             lasttrack=track;
 353             istop=0;
 354             selected=0;
 355             //AliInfo("starting t0 calculation for current set");
 356             for (Int_t i1=0; i1<3;i1++) {
 357               beta[0]=momentum[0]/sqrt(massarray[i1]*massarray[i1]+momentum[0]*momentum[0]);
 358               for (Int_t i2=0; i2<3;i2++) {
 359                 beta[1]=momentum[1]/sqrt(massarray[i2]*massarray[i2]+momentum[1]*momentum[1]);
 360                 for (Int_t i3=0; i3<3;i3++) {
 361                   beta[2]=momentum[2]/sqrt(massarray[i3]*massarray[i3]+momentum[2]*momentum[2]);
 362                   for (Int_t i4=0; i4<3;i4++) {
 363                     beta[3]=momentum[3]/sqrt(massarray[i4]*massarray[i4]+momentum[3]*momentum[3]);
 364                     for (Int_t i5=0; i5<3;i5++) {
 365                       beta[4]=momentum[4]/sqrt(massarray[i5]*massarray[i5]+momentum[4]*momentum[4]);
 366                       for (Int_t i6=0; i6<3;i6++) {
 367                         beta[5]=momentum[5]/sqrt(massarray[i6]*massarray[i6]+momentum[5]*momentum[5]);
 368                         for (Int_t i7=0; i7<3;i7++) {
 369                           beta[6]=momentum[6]/sqrt(massarray[i7]*massarray[i7]+momentum[6]*momentum[6]);
 370                           for (Int_t i8=0; i8<3;i8++) {
 371                             beta[7]=momentum[7]/sqrt(massarray[i8]*massarray[i8]+momentum[7]*momentum[7]);
 372                             for (Int_t i9=0; i9<3;i9++) {
 373                               beta[8]=momentum[8]/sqrt(massarray[i9]*massarray[i9]+momentum[8]*momentum[8]);
 374                               for (Int_t i10=0; i10<3;i10++) {
 375                                 beta[9]=momentum[9]/sqrt(massarray[i10]*massarray[i10]+momentum[9]*momentum[9]);
 376
 377                                 Float_t meantzero=0.;
 378                                 Float_t sumAllweights=0.;
 379                                 for (Int_t itz=0; itz<10;itz++) {
 380                                   sqMomError[itz]=((1.-beta[itz]*beta[itz])*0.025)*((1.-beta[itz]*beta[itz])*0.025)*(tracktoflen[itz]/(0.299792*beta[itz]))*(tracktoflen[itz]/(0.299792*beta[itz])); // this gives the square of the momentum error in nanoseconds
 381                                   sqTrackError[itz]=(timeresolutioninns*timeresolutioninns+sqMomError[itz]); // total error for the current track
 382                                   sumAllweights+=1./sqTrackError[itz];
 383
 384                                   timezero[itz]=(tracktoflen[itz]/(beta[itz]*0.299792))-timeofflight[itz];
 385                                   weightedtimezero[itz]=((tracktoflen[itz]/(beta[itz]*0.299792))-timeofflight[itz])/sqTrackError[itz];// weighted time zero for current track
 386                                   meantzero+=weightedtimezero[itz];
 387                                 } // end loop for (Int_t itz=0; itz<10;itz++)
 388                                 meantzero=meantzero/sumAllweights; // it is given in [ns]
 389
 390                                 dummychisquare=0.;
 391                                 // calculate the chisquare for the current assignment
 392                                 for (Int_t icsq=0; icsq<10;icsq++) {
 393                                   dummychisquare+=(timezero[icsq]-meantzero)*(timezero[icsq]-meantzero)/sqTrackError[icsq];
 394                                 } // end loop for (Int_t icsq=0; icsq<10;icsq++)
 395
 396                                 if(dummychisquare<=chisquare){
 397                                   assparticle[0]=i1;
 398                                   assparticle[1]=i2;
 399                                   assparticle[2]=i3;
 400                                   assparticle[3]=i4;
 401                                   assparticle[4]=i5;
 402                                   assparticle[5]=i6;
 403                                   assparticle[6]=i7;
 404                                   assparticle[7]=i8;
 405                                   assparticle[8]=i9;
 406                                   assparticle[9]=i10;
 407                                   chisquare=dummychisquare;
 408                                   t0best=meantzero;
 409                                 } // close if(dummychisquare<=chisquare)
 410
 411                               } // end loop on i10
 412                             } // end loop on i9
 413                           } // end loop on i8
 414                         } // end loop on i7
 415                       } // end loop on i6
 416                     } // end loop on i5
 417                   } // end loop on i4
 418                 } // end loop on i3
 419               } // end loop on i2
 420             } // end loop on i1
 421
 422             if(truparticle[0]==assparticle[0] && truparticle[1]==assparticle[1] && truparticle[2]==assparticle[2]  && truparticle[3]==assparticle[3] && truparticle[4]==assparticle[4]&& truparticle[5]==assparticle[5] && truparticle[6]==assparticle[6] && truparticle[7]==assparticle[7]  && truparticle[8]==assparticle[8] && truparticle[9]==assparticle[9]) ngood+=1;
 423             if(truparticle[0]!=assparticle[0]) nmisidentified0+=1;
 424             if(truparticle[1]!=assparticle[1]) nmisidentified1+=1;
 425             if(truparticle[2]!=assparticle[2]) nmisidentified2+=1;
 426             if(truparticle[3]!=assparticle[3]) nmisidentified3+=1;
 427             if(truparticle[4]!=assparticle[4]) nmisidentified4+=1;
 428             if(truparticle[5]!=assparticle[5]) nmisidentified5+=1;
 429             if(truparticle[6]!=assparticle[6]) nmisidentified6+=1;
 430             if(truparticle[7]!=assparticle[7]) nmisidentified7+=1;
 431             if(truparticle[8]!=assparticle[8]) nmisidentified8+=1;
 432             if(truparticle[9]!=assparticle[9]) nmisidentified9+=1;
 433             // filling histos
 434             htzerobest->Fill(t0best);
 435             hchibest->Fill(chisquare);
 436             Double_t dblechisquare=(Double_t)chisquare;
 437             Float_t confLevel=(Float_t)TMath::Prob(dblechisquare,9); // ndf 10-1=9
 438             hchibestconflevel->Fill(confLevel);
 439             itimes++;
 440             if(strstr(option,"all")){
 441               AliInfo(Form("True Assignment %d  %d  %d  %d  %d  %d  %d  %d  %d  %d", truparticle[0], truparticle[1], truparticle[2], truparticle[3], truparticle[4], truparticle[5], truparticle[6], truparticle[7], truparticle[8], truparticle[9]));
 442               AliInfo(Form("Best Assignment %d  %d  %d  %d  %d  %d  %d  %d  %d  %d", assparticle[0], assparticle[1], assparticle[2], assparticle[3], assparticle[4], assparticle[5], assparticle[6], assparticle[7], assparticle[8], assparticle[9]));
 443               AliInfo(Form("Minimum ChiSquare for current set   %d ", chisquare));
 444               AliInfo(Form("Confidence Level (Minimum ChiSquare) %d", confLevel));
 445             }
 446             if (strstr(option,"visual") && itimes && (itimes%kUPDATE) == 0) {
 447               if (itimes == kUPDATE){
 448                 c1->cd();
 449                 htzerobest->Draw();
 450                 c2->cd();
 451                 hchibest->Draw();
 452                 c3->cd();
 453                 hchibestconflevel->Draw();
 454               }
 455               c1->Modified();
 456               c1->Update();
 457               c2->Modified();
 458               c2->Update();
 459               c3->Modified();
 460               c3->Update();
 461               if (gSystem->ProcessEvents())
 462                 break;
 463             }
 464             chisquare=999.;
 465             t0best=999.;
 466
 467           } // end for the current set. close if(istop==5)
 468         } // end condition on ipartold
 469       } // end loop on hits for the current track
 470       if(istop>=10) break;
 471     } // end loop on ntracks
 472   } //event loop
 473
 474   if(strstr(option,"all")){
 475     nmisidentified=(nmisidentified0+nmisidentified1+nmisidentified2+nmisidentified3+nmisidentified4+nmisidentified5+nmisidentified6+nmisidentified7+nmisidentified8+nmisidentified9);
 476     AliInfo(Form("total number of tracks token into account  %i", 10*5*fNevents));
 477     Float_t badPercentage=100.*(Float_t)nmisidentified/(10*5*fNevents);
 478     AliInfo(Form("total misidentified                       %i (%d %) ", nmisidentified, badPercentage));
 479     AliInfo(Form("Total Number of set token into account     %i", 5*fNevents));
 480     Float_t goodSetPercentage=100.*(Float_t)ngood/(5*fNevents);
 481     AliInfo(Form("Number of set with no misidentified tracks %i (%d %)", ngood, goodSetPercentage));
 482   }
 483
 484   // free used memory for canvas
 485   delete c1; c1=0;
 486   delete c2; c2=0;
 487   delete c3; c3=0;
 488
 489   // generating output filename only if not previously specified using SetTZeroFile
 490   char outFileName[70];
 491   strcpy(outFileName,"ht010tr120ps"); // global time resolution has to be converted from Int_t to char
 492                                       // in order to have in the output filename this parameter
 493   strcat(outFileName,fHeadersFile);
 494
 495   if(fT0File.IsNull()) fT0File=outFileName;
 496
 497   TFile* houtfile = new TFile(fT0File,"recreate");
 498   houtfile->cd();
 499   htzerobest->Write(0,TObject::kOverwrite);
 500   hchibest->Write(0,TObject::kOverwrite);
 501   hchibestconflevel->Write(0,TObject::kOverwrite);
 502   houtfile->Close();
 503
 504
 505   if(strstr(option,"tim") || strstr(option,"all")){
 506     gBenchmark->Stop("TOFT0");
 507     AliInfo("AliTOFT0:");
 508     /*
 509     cout << "   took " << gBenchmark->GetCpuTime("TOFT0") << " seconds in order to calculate T0 "
 510          << gBenchmark->GetCpuTime("TOFT0")/fNevents << " seconds per event " << endl ;
 511     */
 512     gBenchmark->Print("TOFT0");
 513   }
 514 }
 515
 516 //__________________________________________________________________
 517 void AliTOFT0::SetTZeroFile(char * file )
 518 {
 519   //
 520   //
 521   //
 522   printf("Destination file : %s \n", file) ;
 523   fT0File=file;
 524
 525 }
 526
 527 //__________________________________________________________________
 528 void AliTOFT0::Print(Option_t* /*option*/)const
 529 {
 530   //
 531   //
 532   //
 533   printf("------------------- %s -------------\n", GetName()) ;
 534   if(!fT0File.IsNull())
 535     printf("  Writing T0 Distribution to file  %s \n",(char*) fT0File.Data());
 536
 537 }
 538
 539 //__________________________________________________________________
 540 Bool_t AliTOFT0::operator==( AliTOFT0 const &tzero )const
 541 {
 542   //
 543   // Equal operator
 544   //
 545
 546   if( (fTimeResolution==tzero.fTimeResolution)&&(fLowerMomBound==tzero.fLowerMomBound)&&(fUpperMomBound==tzero.fUpperMomBound))
 547     return kTRUE ;
 548   else
 549     return kFALSE ;
 550 }