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.              *
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  11  * appear in the supporting documentation. The authors make no claims     *
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  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18
  19 /// \ingroup macros
  20 /// \file MUONTriggerEfficiencyPt.C
  21 /// \brief Macro to produce trigger single muon efficiency versus pt plots for the
  22 /// 2 pt cuts.
  23 ///
  24 /// See full description on the \ref README_trigger page.
  25 ///
  26 /// \author Fabien Guerin (LPC)
  27
  28 // ROOT includes
  29 #include "TBranch.h"
  30 #include "TClonesArray.h"
  31 #include "TFile.h"
  32 #include "TF1.h"
  33 #include "TH1.h"
  34 #include "TH2.h"
  35 #include "TParticle.h"
  36 #include "TTree.h"
  37 #include "TMath.h"
  38 #include "TStyle.h"
  39 #include "TCanvas.h"
  40 #include "TLegend.h"
  41 #include "Riostream.h"
  42
  43 // STEER includes
  44 #include "AliRun.h"
  45 #include "AliRunLoader.h"
  46 #include "AliHeader.h"
  47 #include "AliLoader.h"
  48 #include "AliStack.h"
  49
  50 // MUON includes
  51 #include "AliMUONDataInterface.h"
  52 #include "AliMUONMCDataInterface.h"
  53 #include "AliMUONVHitStore.h"
  54 #include "AliMUONVTriggerStore.h"
  55 #include "AliMUONHit.h"
  56 #include "AliMUONDigit.h"
  57 #include "AliMUONGlobalTrigger.h"
  58 #include "AliMUONTrack.h"
  59
  60 Double_t fitArc(Double_t *x,Double_t *par)
  61 {
  62   Double_t h1=par[1]*(x[0]+par[2]);
  63   return par[0]*TMath::ATan(TMath::Power(h1,6))+par[3];
  64 }
  65
  66 Double_t fitArch(Double_t *x,Double_t *par)
  67 {
  68   Double_t h0=2*par[0]/(TMath::Pi());
  69   Double_t h1=par[1]*x[0]+par[2]*x[0]*x[0];
  70   return h0*TMath::TanH(h1)+par[3];
  71 }
  72
  73 void MUONTriggerEfficiencyPt(const char* filenameSim="galice_sim.root",
  74                              const char* filenameRec="galice.root",
  75                              Bool_t readFromRP = 0)
  76 {
  77
  78 // define style
  79     TStyle *st1 = new TStyle("st1","My STYLE");
  80
  81     st1->SetOptStat(0);
  82     st1->SetOptFit(111);
  83     st1->SetFrameFillColor(10);
  84     st1->SetCanvasColor(10);
  85     st1->SetFillColor(10);
  86     st1->SetTitleBorderSize(0);
  87     st1->SetTitleOffset(1.2,"XY");
  88     st1->SetTitleSize(0.05,"XY");
  89     st1->SetLabelSize(0.045,"XY");
  90     st1->SetLabelFont(22,"XY");
  91     st1->SetTitleFont(22,"XY");
  92     st1->SetOptTitle(0);
  93     st1->SetStatColor(10);
  94     st1->SetStatFont(62);
  95     st1->SetFitFormat("4.4g");
  96     st1->SetPadLeftMargin(0.15);
  97     st1->SetPadRightMargin(0.06);
  98     st1->SetPadTopMargin(0.06);
  99     st1->SetPadBottomMargin(0.15);
 100     st1->cd();
 101
 102 //    gROOT->ForceStyle();
 103     //TGaxis::SetMaxDigits(3);
 104
 105 // beginning of macro
 106     TH1F *ptlpt    = new TH1F("ptlpt","",50,0.15,5.);
 107     TH1F *pthpt    = new TH1F("pthpt","",50,0.15,5.);
 108     TH1F *ptcoinc  = new TH1F("ptcoinc","",50,0.15,5.);
 109
 110     TParticle *particle;
 111
 112     Int_t nevents;
 113     Double_t coincmuon=0;
 114     Double_t lptmuon=0;
 115     Double_t hptmuon=0;
 116     Double_t ptmu=0;
 117
 118     AliMUONMCDataInterface diSim(filenameSim);
 119     AliMUONDataInterface diRec(filenameRec);
 120
 121     if (!diSim.IsValid())
 122     {
 123         cerr << "Cannot access " << filenameSim << endl;
 124         return;
 125     }
 126
 127     if (!diRec.IsValid())
 128     {
 129         cerr << "Cannot access " << filenameRec << endl;
 130         return;
 131     }
 132
 133     FILE* fdat = fopen("MUONTriggerEfficiencyPt.out","w");
 134     if (!fdat)
 135     {
 136         cerr << "Cannot create output file" << endl;
 137         return;
 138     }
 139
 140     nevents = diSim.NumberOfEvents();
 141
 142     AliRunLoader* runLoader = AliRunLoader::Open(filenameSim);
 143
 144     for (Int_t ievent=0; ievent<nevents; ievent++) {  // Event loop
 145
 146         if (ievent%500==0) printf("ievent = %d \n",ievent);
 147 // kine
 148
 149         runLoader->GetRunLoader()->GetEvent(ievent);
 150         runLoader->GetRunLoader()->LoadKinematics();
 151         AliStack* stack = runLoader->GetRunLoader()->Stack();
 152
 153         Int_t nparticles = (Int_t) stack->GetNtrack();
 154
 155         for (Int_t iparticle=0; iparticle<nparticles; iparticle++) {
 156             particle = stack->Particle(iparticle);
 157             Float_t pt = particle->Pt();
 158             Int_t pdgcode = particle->GetPdgCode();
 159             if (pdgcode==-13 || pdgcode==13) ptmu = pt;
 160         }
 161
 162 // global trigger
 163         TString tree("D");
 164         if ( readFromRP ) tree = "R";
 165
 166         AliMUONVTriggerStore* triggerStore = diRec.TriggerStore(ievent,tree.Data());
 167         AliMUONGlobalTrigger* gloTrg = triggerStore->Global();
 168
 169         if (gloTrg->SingleLpt()>=1 ) {
 170             lptmuon++;
 171             ptlpt->Fill(ptmu);
 172         }
 173         if (gloTrg->SingleHpt()>=1 ) {
 174             hptmuon++;
 175             pthpt->Fill(ptmu);
 176         }
 177
 178 // Hits
 179         Int_t itrack, ntracks, NbHits[4];
 180         Int_t SumNbHits;
 181
 182         for (Int_t j=0; j<4; j++) NbHits[j]=0;
 183
 184         ntracks = (Int_t) diSim.NumberOfTracks(ievent);
 185
 186         for (itrack=0; itrack<ntracks; itrack++) { // track loop
 187             AliMUONVHitStore* hitStore = diSim.HitStore(ievent,itrack);
 188             AliMUONHit* mHit;
 189             TIter next(hitStore->CreateIterator());
 190
 191             while ( ( mHit = static_cast<AliMUONHit*>(next()) ) )
 192             {
 193                 Int_t Nch        = mHit->Chamber();
 194                 Int_t hittrack   = mHit->Track();
 195                 Float_t IdPart   = mHit->Particle();
 196
 197                 for (Int_t j=0;j<4;j++) {
 198                     Int_t kch=11+j;
 199                     if (hittrack==0) {
 200                         if (Nch==kch && (IdPart==-13 || IdPart==13) && NbHits[j]==0) NbHits[j]++;
 201                     }
 202                 }
 203             }
 204         } // end track loop
 205
 206
 207 // 3/4 coincidence
 208         SumNbHits=NbHits[0]+NbHits[1]+NbHits[2]+NbHits[3];
 209
 210         if (SumNbHits==3 || SumNbHits==4) {
 211             coincmuon++;
 212             ptcoinc->Fill(ptmu);
 213         }
 214
 215
 216     } // end loop on event
 217
 218     if (coincmuon==0) {
 219         cout << " >>> <E> coincmuon = 0 after event loop " << "\n";
 220         cout << " >>> this probably means that input does not contain one (and only one) " << "\n";
 221         cout << " >>> muon track per event as it should " << "\n";
 222         cout << " >>> see README for further information " << "\n";
 223         cout << " >>> exiting now ! " << "\n";
 224         return;
 225     }
 226
 227
 228     fprintf(fdat,"\n");
 229     fprintf(fdat,"\n");
 230     fprintf(fdat," Number of events = %d \n",nevents);
 231     fprintf(fdat," Number of events with 3/4 coinc = %d \n",(Int_t)coincmuon);
 232     fprintf(fdat," Nomber of dimuons with 3/4 coinc Lpt cut = %d \n",(Int_t)lptmuon);
 233     fprintf(fdat," Number of dimuons with 3/4 coinc Hpt cut = %d \n",(Int_t)hptmuon);
 234     fprintf(fdat,"\n");
 235
 236     Double_t efficiency,error;
 237
 238     efficiency=lptmuon/coincmuon;
 239     error=efficiency*TMath::Sqrt((lptmuon+coincmuon)/(lptmuon*coincmuon));
 240     fprintf(fdat," Efficiency Lpt cut = %4.4f +/- %4.4f\n",efficiency,error);
 241
 242     efficiency=hptmuon/coincmuon;
 243     error=efficiency*TMath::Sqrt((hptmuon+coincmuon)/(hptmuon*coincmuon));
 244     fprintf(fdat," Efficiency Hpt cut = %4.4f +/- %4.4f\n",efficiency,error);
 245
 246     fclose(fdat);
 247
 248     Double_t x1,x2,xval,xerr;
 249
 250     for (Int_t i=0;i<50;i++) {
 251         x1=ptcoinc->GetBinContent(i+1);
 252
 253         x2=ptlpt->GetBinContent(i+1);
 254         if (x1!=0 && x2!=0) {
 255             xval=x2/x1;
 256             xerr=xval*TMath::Sqrt((x1+x2)/x1*x2);
 257             ptlpt->SetBinContent(i+1,xval);
 258             ptlpt->SetBinError(i+1,0);
 259         } else {
 260             ptlpt->SetBinContent(i+1,0.);
 261             ptlpt->SetBinError(i+1,0.);
 262         }
 263
 264         x2=pthpt->GetBinContent(i+1);
 265         if (x1!=0 && x2!=0) {
 266             xval=x2/x1;
 267             xerr=xval*TMath::Sqrt((x1+x2)/x1*x2);
 268             pthpt->SetBinContent(i+1,xval);
 269             pthpt->SetBinError(i+1,0);
 270         } else {
 271             pthpt->SetBinContent(i+1,0.);
 272             pthpt->SetBinError(i+1,0.);
 273         }
 274     }
 275
 276     TF1 *fitlpt = new TF1("fitlpt",fitArc,0.,5.,4);
 277     TF1 *fithpt = new TF1("fithpt",fitArc,0.,5.,4);
 278
 279     TCanvas *c1 = new TCanvas("c1","Trigger efficiency vs pt and y for single muon",200,0,900,400);
 280     c1->Divide(2,1);
 281
 282     c1->cd(1);
 283     ptlpt->SetMinimum(0.);
 284     ptlpt->SetMaximum(1.05);
 285     ptlpt->SetTitle("");
 286     ptlpt->GetXaxis()->SetTitle("P_{T} (GeV/c)");
 287     ptlpt->GetYaxis()->SetTitle("Efficiency");
 288     //ptlpt->GetXaxis()->SetRange(3);
 289     ptlpt->Draw("");
 290     fitlpt->SetParameters(0.602,0.774,0.273,0.048);
 291     fitlpt->SetLineColor(2);
 292     fitlpt->SetLineWidth(2);
 293     fitlpt->Draw("SAME");
 294     TLegend * leg = new TLegend(0.5,0.38,0.85,0.53);
 295     leg = new TLegend(0.5,0.38,0.85,0.53);
 296     leg->SetBorderSize(0);
 297     leg->SetFillColor(0);
 298     leg->SetTextSize(0.05);
 299     leg->SetTextFont(22);
 300     leg->SetHeader("Lpt trigger pt cut");
 301     leg->AddEntry(fitlpt,"Ref.","l");
 302     leg->AddEntry(ptlpt,"New","l");
 303     leg->Draw("SAME");
 304
 305     c1->cd(2);
 306     pthpt->SetMinimum(0.);
 307     pthpt->SetMaximum(1.05);
 308     pthpt->SetTitle("");
 309     pthpt->GetXaxis()->SetTitle("P_{T} (GeV/c)");
 310     pthpt->GetYaxis()->SetTitle("Efficiency");
 311     //pthpt->GetXaxis()->SetRange(3);
 312     pthpt->Draw("");
 313     fithpt->SetParameters(0.627,0.393,0.855,0.0081);
 314     fithpt->SetLineColor(2);
 315     fithpt->SetLineWidth(2);
 316     fithpt->Draw("SAME");
 317     leg = new TLegend(0.5,0.38,0.85,0.53);
 318     leg->SetBorderSize(0);
 319     leg->SetFillColor(0);
 320     leg->SetTextSize(0.05);
 321     leg->SetTextFont(22);
 322     leg->SetHeader("Hpt trigger pt cut");
 323     leg->AddEntry(fithpt,"Ref.","l");
 324     leg->AddEntry(pthpt,"New","l");
 325     leg->Draw("SAME");
 326
 327     c1->SaveAs("MUONTriggerEfficiencyPt.gif");
 328     c1->SaveAs("MUONTriggerEfficiencyPt.eps");
 329
 330 }