MUON/MUONTriggerEfficiencyPt.C

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18
  19 // Macro to produce trigger single muon efficiency versus pt plots for the
  20 // 2 pt cuts.
  21 // see full description in the README file
  22 // Author: Fabien Guerin (LPC)
  23
  24 // ROOT includes
  25 #include "TBranch.h"
  26 #include "TClonesArray.h"
  27 #include "TFile.h"
  28 #include "TF1.h"
  29 #include "TH1.h"
  30 #include "TH2.h"
  31 #include "TParticle.h"
  32 #include "TTree.h"
  33 #include "TMath.h"
  34 #include "TStyle.h"
  35 #include "TCanvas.h"
  36 #include "TLegend.h"
  37 #include "Riostream.h"
  38
  39 // STEER includes
  40 #include "AliRun.h"
  41 #include "AliRunLoader.h"
  42 #include "AliHeader.h"
  43 #include "AliLoader.h"
  44 #include "AliStack.h"
  45
  46 // MUON includes
  47 #include "AliMUONDataInterface.h"
  48 #include "AliMUONMCDataInterface.h"
  49 #include "AliMUONVHitStore.h"
  50 #include "AliMUONVTriggerStore.h"
  51 #include "AliMUONHit.h"
  52 #include "AliMUONDigit.h"
  53 #include "AliMUONGlobalTrigger.h"
  54 #include "AliMUONTrack.h"
  55
  56 Double_t fitArc(Double_t *x,Double_t *par)
  57 {
  58   Double_t h1=par[1]*(x[0]+par[2]);
  59   return par[0]*TMath::ATan(TMath::Power(h1,6))+par[3];
  60 }
  61
  62 Double_t fitArch(Double_t *x,Double_t *par)
  63 {
  64   Double_t h0=2*par[0]/(TMath::Pi());
  65   Double_t h1=par[1]*x[0]+par[2]*x[0]*x[0];
  66   return h0*TMath::TanH(h1)+par[3];
  67 }
  68
  69 void MUONTriggerEfficiencyPt(const char* filenameSim="galice_sim.root",
  70                              const char* filenameRec="galice.root",
  71                              Bool_t readFromRP = 0)
  72 {
  73
  74 // define style
  75     TStyle *st1 = new TStyle("st1","My STYLE");
  76
  77     st1->SetOptStat(0);
  78     st1->SetOptFit(111);
  79     st1->SetFrameFillColor(10);
  80     st1->SetCanvasColor(10);
  81     st1->SetFillColor(10);
  82     st1->SetTitleBorderSize(0);
  83     st1->SetTitleOffset(1.2,"XY");
  84     st1->SetTitleSize(0.05,"XY");
  85     st1->SetLabelSize(0.045,"XY");
  86     st1->SetLabelFont(22,"XY");
  87     st1->SetTitleFont(22,"XY");
  88     st1->SetOptTitle(0);
  89     st1->SetStatColor(10);
  90     st1->SetStatFont(62);
  91     st1->SetFitFormat("4.4g");
  92     st1->SetPadLeftMargin(0.15);
  93     st1->SetPadRightMargin(0.06);
  94     st1->SetPadTopMargin(0.06);
  95     st1->SetPadBottomMargin(0.15);
  96     st1->cd();
  97
  98 //    gROOT->ForceStyle();
  99     //TGaxis::SetMaxDigits(3);
 100
 101 // beginning of macro
 102     TH1F *ptlpt    = new TH1F("ptlpt","",50,0.15,5.);
 103     TH1F *pthpt    = new TH1F("pthpt","",50,0.15,5.);
 104     TH1F *ptcoinc  = new TH1F("ptcoinc","",50,0.15,5.);
 105
 106     TParticle *particle;
 107
 108     Int_t nevents;
 109     Double_t coincmuon=0;
 110     Double_t lptmuon=0;
 111     Double_t hptmuon=0;
 112     Double_t ptmu=0;
 113
 114     AliMUONMCDataInterface diSim(filenameSim);
 115     AliMUONDataInterface diRec(filenameRec);
 116
 117     if (!diSim.IsValid())
 118     {
 119         cerr << "Cannot access " << filenameSim << endl;
 120         return;
 121     }
 122
 123     if (!diRec.IsValid())
 124     {
 125         cerr << "Cannot access " << filenameRec << endl;
 126         return;
 127     }
 128
 129     FILE* fdat = fopen("MUONTriggerEfficiencyPt.out","w");
 130     if (!fdat)
 131     {
 132         cerr << "Cannot create output file" << endl;
 133         return;
 134     }
 135
 136     nevents = diSim.NumberOfEvents();
 137
 138     AliRunLoader* runLoader = AliRunLoader::Open(filenameSim);
 139
 140     for (Int_t ievent=0; ievent<nevents; ievent++) {  // Event loop
 141
 142         if (ievent%500==0) printf("ievent = %d \n",ievent);
 143 // kine
 144
 145         runLoader->GetRunLoader()->GetEvent(ievent);
 146         runLoader->GetRunLoader()->LoadKinematics();
 147         AliStack* stack = runLoader->GetRunLoader()->Stack();
 148
 149         Int_t nparticles = (Int_t) stack->GetNtrack();
 150
 151         for (Int_t iparticle=0; iparticle<nparticles; iparticle++) {
 152             particle = stack->Particle(iparticle);
 153             Float_t pt = particle->Pt();
 154             Int_t pdgcode = particle->GetPdgCode();
 155             if (pdgcode==-13 || pdgcode==13) ptmu = pt;
 156         }
 157
 158 // global trigger
 159         TString tree("D");
 160         if ( readFromRP ) tree = "R";
 161
 162         AliMUONVTriggerStore* triggerStore = diRec.TriggerStore(ievent,tree.Data());
 163         AliMUONGlobalTrigger* gloTrg = triggerStore->Global();
 164
 165         if (gloTrg->SingleLpt()>=1 ) {
 166             lptmuon++;
 167             ptlpt->Fill(ptmu);
 168         }
 169         if (gloTrg->SingleHpt()>=1 ) {
 170             hptmuon++;
 171             pthpt->Fill(ptmu);
 172         }
 173
 174 // Hits
 175         Int_t itrack, ntracks, NbHits[4];
 176         Int_t SumNbHits;
 177
 178         for (Int_t j=0; j<4; j++) NbHits[j]=0;
 179
 180         ntracks = (Int_t) diSim.NumberOfTracks(ievent);
 181
 182         for (itrack=0; itrack<ntracks; itrack++) { // track loop
 183             AliMUONVHitStore* hitStore = diSim.HitStore(ievent,itrack);
 184             AliMUONHit* mHit;
 185             TIter next(hitStore->CreateIterator());
 186
 187             while ( ( mHit = static_cast<AliMUONHit*>(next()) ) )
 188             {
 189                 Int_t Nch        = mHit->Chamber();
 190                 Int_t hittrack   = mHit->Track();
 191                 Float_t IdPart   = mHit->Particle();
 192
 193                 for (Int_t j=0;j<4;j++) {
 194                     Int_t kch=11+j;
 195                     if (hittrack==0) {
 196                         if (Nch==kch && (IdPart==-13 || IdPart==13) && NbHits[j]==0) NbHits[j]++;
 197                     }
 198                 }
 199             }
 200         } // end track loop
 201
 202
 203 // 3/4 coincidence
 204         SumNbHits=NbHits[0]+NbHits[1]+NbHits[2]+NbHits[3];
 205
 206         if (SumNbHits==3 || SumNbHits==4) {
 207             coincmuon++;
 208             ptcoinc->Fill(ptmu);
 209         }
 210
 211
 212     } // end loop on event
 213
 214     if (coincmuon==0) {
 215         cout << " >>> <E> coincmuon = 0 after event loop " << "\n";
 216         cout << " >>> this probably means that input does not contain one (and only one) " << "\n";
 217         cout << " >>> muon track per event as it should " << "\n";
 218         cout << " >>> see README for further information " << "\n";
 219         cout << " >>> exiting now ! " << "\n";
 220         return;
 221     }
 222
 223
 224     fprintf(fdat,"\n");
 225     fprintf(fdat,"\n");
 226     fprintf(fdat," Number of events = %d \n",nevents);
 227     fprintf(fdat," Number of events with 3/4 coinc = %d \n",(Int_t)coincmuon);
 228     fprintf(fdat," Nomber of dimuons with 3/4 coinc Lpt cut = %d \n",(Int_t)lptmuon);
 229     fprintf(fdat," Number of dimuons with 3/4 coinc Hpt cut = %d \n",(Int_t)hptmuon);
 230     fprintf(fdat,"\n");
 231
 232     Double_t efficiency,error;
 233
 234     efficiency=lptmuon/coincmuon;
 235     error=efficiency*TMath::Sqrt((lptmuon+coincmuon)/(lptmuon*coincmuon));
 236     fprintf(fdat," Efficiency Lpt cut = %4.4f +/- %4.4f\n",efficiency,error);
 237
 238     efficiency=hptmuon/coincmuon;
 239     error=efficiency*TMath::Sqrt((hptmuon+coincmuon)/(hptmuon*coincmuon));
 240     fprintf(fdat," Efficiency Hpt cut = %4.4f +/- %4.4f\n",efficiency,error);
 241
 242     fclose(fdat);
 243
 244     Double_t x1,x2,xval,xerr;
 245
 246     for (Int_t i=0;i<50;i++) {
 247         x1=ptcoinc->GetBinContent(i+1);
 248
 249         x2=ptlpt->GetBinContent(i+1);
 250         if (x1!=0 && x2!=0) {
 251             xval=x2/x1;
 252             xerr=xval*TMath::Sqrt((x1+x2)/x1*x2);
 253             ptlpt->SetBinContent(i+1,xval);
 254             ptlpt->SetBinError(i+1,0);
 255         } else {
 256             ptlpt->SetBinContent(i+1,0.);
 257             ptlpt->SetBinError(i+1,0.);
 258         }
 259
 260         x2=pthpt->GetBinContent(i+1);
 261         if (x1!=0 && x2!=0) {
 262             xval=x2/x1;
 263             xerr=xval*TMath::Sqrt((x1+x2)/x1*x2);
 264             pthpt->SetBinContent(i+1,xval);
 265             pthpt->SetBinError(i+1,0);
 266         } else {
 267             pthpt->SetBinContent(i+1,0.);
 268             pthpt->SetBinError(i+1,0.);
 269         }
 270     }
 271
 272     TF1 *fitlpt = new TF1("fitlpt",fitArc,0.,5.,4);
 273     TF1 *fithpt = new TF1("fithpt",fitArc,0.,5.,4);
 274
 275     TCanvas *c1 = new TCanvas("c1","Trigger efficiency vs pt and y for single muon",200,0,900,400);
 276     c1->Divide(2,1);
 277
 278     c1->cd(1);
 279     ptlpt->SetMinimum(0.);
 280     ptlpt->SetMaximum(1.05);
 281     ptlpt->SetTitle("");
 282     ptlpt->GetXaxis()->SetTitle("P_{T} (GeV/c)");
 283     ptlpt->GetYaxis()->SetTitle("Efficiency");
 284     //ptlpt->GetXaxis()->SetRange(3);
 285     ptlpt->Draw("");
 286     fitlpt->SetParameters(0.602,0.774,0.273,0.048);
 287     fitlpt->SetLineColor(2);
 288     fitlpt->SetLineWidth(2);
 289     fitlpt->Draw("SAME");
 290     TLegend * leg = new TLegend(0.5,0.38,0.85,0.53);
 291     leg = new TLegend(0.5,0.38,0.85,0.53);
 292     leg->SetBorderSize(0);
 293     leg->SetFillColor(0);
 294     leg->SetTextSize(0.05);
 295     leg->SetTextFont(22);
 296     leg->SetHeader("Lpt trigger pt cut");
 297     leg->AddEntry(fitlpt,"Ref.","l");
 298     leg->AddEntry(ptlpt,"New","l");
 299     leg->Draw("SAME");
 300
 301     c1->cd(2);
 302     pthpt->SetMinimum(0.);
 303     pthpt->SetMaximum(1.05);
 304     pthpt->SetTitle("");
 305     pthpt->GetXaxis()->SetTitle("P_{T} (GeV/c)");
 306     pthpt->GetYaxis()->SetTitle("Efficiency");
 307     //pthpt->GetXaxis()->SetRange(3);
 308     pthpt->Draw("");
 309     fithpt->SetParameters(0.627,0.393,0.855,0.0081);
 310     fithpt->SetLineColor(2);
 311     fithpt->SetLineWidth(2);
 312     fithpt->Draw("SAME");
 313     leg = new TLegend(0.5,0.38,0.85,0.53);
 314     leg->SetBorderSize(0);
 315     leg->SetFillColor(0);
 316     leg->SetTextSize(0.05);
 317     leg->SetTextFont(22);
 318     leg->SetHeader("Hpt trigger pt cut");
 319     leg->AddEntry(fithpt,"Ref.","l");
 320     leg->AddEntry(pthpt,"New","l");
 321     leg->Draw("SAME");
 322
 323     c1->SaveAs("MUONTriggerEfficiencyPt.gif");
 324     c1->SaveAs("MUONTriggerEfficiencyPt.eps");
 325
 326 }