PWGLF/totEt/AliAnalysisHadEt.cxx

   1 //Created by Christine Nattrass, Rebecca Scott, Irakli Martashvili
   2 //University of Tennessee at Knoxville
   3 //
   4 // This class is designed for the analysis of the hadronic component of
   5 // transverse energy.  It is used by AliAnalysisTaskHadEt.
   6 // This gets information about the hadronic component of the transverse energy
   7 // from tracks reconstructed in an event
   8 // it has daughters, AliAnalysisHadEtMonteCarlo and
   9 // AliAnalysisHadEtReconstructed which loop over either Monte Carlo data or
  10 // real data to get Et
  11
  12 #include "AliAnalysisHadEt.h"
  13 #include "TMath.h"
  14 #include "TList.h"
  15 #include "TH1F.h"
  16 #include "TH2F.h"
  17 #include <iostream>
  18 #include "AliAnalysisEtCuts.h"
  19 #include "AliMCEvent.h"
  20 #include "AliVEvent.h"
  21 #include "AliStack.h"
  22 #include "AliESDtrackCuts.h"
  23 #include "TDatabasePDG.h"
  24 #include "TParticle.h"
  25 #include "Rtypes.h"
  26 #include "AliPDG.h"
  27 #include "AliPIDResponse.h"
  28 #include "AliTPCPIDResponse.h"
  29 #include "AliInputEventHandler.h"
  30 #include "AliAnalysisManager.h"
  31 #include "AliLog.h"
  32
  33 using namespace std;
  34
  35 ClassImp(AliAnalysisHadEt);
  36
  37
  38 Int_t AliAnalysisHadEt::fgnumOfEtaBins = 16;
  39 Float_t AliAnalysisHadEt::fgEtaAxis[17]={-0.78, -0.7, -0.58, -0.46, -0.34, -0.22, -0.12, -0.06, -0.0, 0.06, 0.12, 0.22, 0.34, 0.46, 0.58, 0.7, 0.78};
  40 Int_t AliAnalysisHadEt::fgNumOfPtBins = 111;
  41 Float_t AliAnalysisHadEt::fgPtAxis[117]=
  42   {0.0,0.01,0.02,0.03,0.04, 0.05, 0.06,0.07,0.08,0.09, 0.10,0.11, .12,0.13, .14,0.15, .16,0.17, .18,0.19,
  43    0.2, .22, .24, .26, .28, 0.30, 0.32, .34, .36, .38, 0.40, .42, .44, .46, .48,
  44    0.5, .52, .54, .56, .58, 0.60, 0.62, .64, .66, .68, 0.70, .72, .74, .76, .78,
  45    .80, .82, .84, .86, .88, 0.90, 0.92, .94, .96, .98, 1.00,1.05, 1.1,1.15, 1.2,
  46   1.25, 1.3,1.35,1.40,1.45, 1.50, 1.55, 1.6,1.65, 1.7, 1.75, 1.8,1.85, 1.9,1.95,
  47    2.0, 2.2, 2.4, 2.6, 2.8, 3.00, 3.20, 3.4, 3.6, 3.8, 4.00, 4.2, 4.4, 4.6, 4.8,
  48    5.0, 5.5, 6.0, 6.5, 7.0, 7.50, 8.00, 8.5, 9.0, 9.5, 10.0,12.0,14.0,16.0,18.0,
  49   20.0,25.0,30.0,35.0,40.0, 45.0, 50.0};
  50 Float_t AliAnalysisHadEt::fgResAxis[81] = {-0.150,-0.140,-0.130,-0.120,-0.110,-0.100,-0.090,-0.080,-0.070,-0.060,
  51                                            -0.050,-0.045,-0.040,-0.035,-0.030,-0.025,-0.024,-0.023,-0.022,-0.021,
  52                                            -0.020,-0.019,-0.018,-0.017,-0.016,-0.015,-0.014,-0.013,-0.012,-0.011,
  53                                            -0.010,-0.009,-0.008,-0.007,-0.006,-0.005,-0.004,-0.003,-0.002,-0.001,
  54                                            -0.000,0.001,0.002,0.003,0.004,0.005,0.006,0.007,0.008,0.009,
  55                                            0.010,0.011,0.012,0.013,0.014,0.015,0.016,0.017,0.018,0.019,
  56                                            0.020,0.021,0.022,0.023,0.024,0.025,0.030,0.035,0.040,0.045,
  57                                            0.050,0.060,0.070,0.080,0.090,0.100,0.110,0.120,0.130,0.140,
  58                                            0.150,};
  59 // Float_t AliAnalysisHadEt::fgResAxis[31] = {-0.15,-0.14,-0.13,-0.12,-0.11,-0.1,-0.09,-0.08,-0.07,-0.06,-0.05,-0.04,-0.03,-0.02,-0.01,0.0,0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.1,0.11,0.12,0.13,0.14,0.15};
  60 Int_t AliAnalysisHadEt::fgNumOfResBins = 80;
  61
  62
  63 AliAnalysisHadEt::AliAnalysisHadEt() : AliAnalysisEtCommon()
  64                                      ,fPIDResponse(0)
  65                                      ,fSumEt(0)
  66                                      ,fSumEtAcc(0)
  67                                      ,fTotEt(0)
  68                                      ,fTotEtAcc(0)
  69                                      ,fTotNeutralEt(0)
  70                                      ,fTotNeutralEtAcc(0)
  71                                      ,fTotChargedEt(0)
  72                                      ,fTotChargedEtAcc(0)
  73                                      ,fMultiplicity(0)
  74                                      ,fChargedMultiplicity(0)
  75                                      ,fNeutralMultiplicity(0)
  76                                      ,fhistoList(0)
  77                                      ,fGoodEvent(0)
  78 {//default constructor
  79
  80 }
  81
  82 AliAnalysisHadEt::~AliAnalysisHadEt()
  83 {//destructor
  84   delete fEsdtrackCutsITSTPC;
  85   delete fEsdtrackCutsITS;
  86   delete fEsdtrackCutsTPC;
  87   delete fPIDResponse;
  88 }
  89
  90 Int_t AliAnalysisHadEt::AnalyseEvent(AliVEvent *event)
  91 { //this line is basically here to eliminate a compiler warning that event is not used.  Making it a virtual function did not work with the plugin.
  92   AliAnalysisEtCommon::AnalyseEvent(event);
  93   ResetEventValues();
  94   return 0;
  95 }
  96
  97
  98 void AliAnalysisHadEt::Init()
  99 {// clear variables, set up cuts and PDG info
 100   AliAnalysisEtCommon::Init();
 101
 102 }
 103
 104 void AliAnalysisHadEt::ResetEventValues()
 105 {//Resets event values of et to zero
 106   AliAnalysisEtCommon::ResetEventValues();
 107   fTotEt = 0;
 108   fTotEtAcc = 0;
 109   fTotNeutralEt = 0;
 110   fTotNeutralEtAcc = 0;
 111   fTotChargedEt  = 0;
 112   fTotChargedEtAcc = 0;
 113   fMultiplicity = 0;
 114   fChargedMultiplicity = 0;
 115   fNeutralMultiplicity = 0;
 116
 117 }
 118 void AliAnalysisHadEt::CreateEtaPtHisto2D(TString name, TString title)
 119 {     //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
 120   TString *histoname   = new TString();
 121   TString *histotitle   = new TString();
 122
 123   histoname->Append(name);
 124   histotitle->Append(title);
 125
 126   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgnumOfEtaBins, fgEtaAxis);
 127   histo->SetYTitle("#eta");
 128   histo->SetXTitle("p_{T}");
 129   histo->SetZTitle("E_{T}");
 130   histo->Sumw2();
 131   fhistoList->Add(histo);
 132   delete histoname;
 133   delete histotitle;
 134
 135 }
 136 void AliAnalysisHadEt::CreateResolutionPtHisto2D(TString name, TString title, TString xtitle, TString ytitle)
 137 {     //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
 138   TString *histoname   = new TString();
 139   TString *histotitle   = new TString();
 140
 141   histoname->Append(name);
 142   histotitle->Append(title);
 143
 144   //TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgNumOfResBins, fgResAxis);
 145   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgNumOfResBins, fgResAxis);
 146   histo->SetYTitle(ytitle);
 147   histo->SetXTitle(xtitle);
 148   histo->SetZTitle("Number of entries");
 149   histo->Sumw2();
 150   fhistoList->Add(histo);
 151   delete histoname;
 152   delete histotitle;
 153
 154 }
 155 void AliAnalysisHadEt::CreatePtHisto1D(TString name, TString title, TString xtitle, TString ytitle)
 156 {     //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
 157   TString *histoname   = new TString();
 158   TString *histotitle   = new TString();
 159
 160   histoname->Append(name);
 161   histotitle->Append(title);
 162
 163   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis);
 164   histo->SetYTitle(ytitle);
 165   histo->SetXTitle(xtitle);
 166   histo->Sumw2();
 167   fhistoList->Add(histo);
 168   delete histoname;
 169   delete histotitle;
 170
 171 }
 172
 173 void AliAnalysisHadEt::CreateHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Float_t xlow,Float_t xhigh)
 174 {     //creates a 1d histogram of the given dimensions and adds it to the list of histograms to be saved
 175   TString *histoname   = new TString();
 176   TString *histotitle   = new TString();
 177   histoname->Append(name);
 178   histotitle->Append(title);
 179   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
 180   histo->SetYTitle(ytitle);
 181   histo->SetXTitle(xtitle);
 182   histo->Sumw2();
 183   fhistoList->Add(histo);
 184   delete histoname;
 185   delete histotitle;
 186 }
 187 void AliAnalysisHadEt::CreateIntHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Int_t xlow,Int_t xhigh)
 188 {     //creates a 1d integer histogram and adds it to the list of histograms to be saved
 189   TString *histoname   = new TString();
 190   TString *histotitle   = new TString();
 191   histoname->Append(name);
 192   histotitle->Append(title);
 193   TH1I *histo = new TH1I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
 194   histo->SetYTitle(ytitle);
 195   histo->SetXTitle(xtitle);
 196   histo->Sumw2();
 197   fhistoList->Add(histo);
 198   delete histoname;
 199   delete histotitle;
 200
 201 }
 202 void AliAnalysisHadEt::CreateHisto2D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Float_t xlow,Float_t xhigh,Int_t ybins,Float_t ylow,Float_t yhigh)
 203 {     //creates a 2d histogram and adds it to the list of histograms to be saved
 204   TString *histoname   = new TString();
 205   TString *histotitle   = new TString();
 206   histoname->Append(name);
 207   histotitle->Append(title);
 208   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
 209   histo->SetYTitle(ytitle);
 210   histo->SetXTitle(xtitle);
 211   histo->Sumw2();
 212   fhistoList->Add(histo);
 213   delete histoname;
 214   delete histotitle;
 215
 216 }
 217 void AliAnalysisHadEt::CreateIntHisto2D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Int_t xlow,Int_t xhigh,Int_t ybins,Int_t ylow,Int_t yhigh)
 218 {     //creates a 2-d integer histogram and adds it to the list of histograms to be saved
 219   TString *histoname   = new TString();
 220   TString *histotitle   = new TString();
 221   histoname->Append(name);
 222   histotitle->Append(title);
 223   TH2I *histo = new TH2I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
 224   histo->SetYTitle(ytitle);
 225   histo->SetXTitle(xtitle);
 226   histo->Sumw2();
 227   fhistoList->Add(histo);
 228   delete histoname;
 229   delete histotitle;
 230
 231 }
 232
 233 void AliAnalysisHadEt::CreateEtaHisto1D(TString name, TString title)
 234 {     //creates 1d histogram in eta and adds it to the list of histograms to be saved
 235   TString *histoname   = new TString();
 236   TString *histotitle   = new TString();
 237   histoname->Append(name);
 238   histotitle->Append(title);
 239   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),fgnumOfEtaBins, fgEtaAxis);
 240   histo->SetYTitle("E_{T}");
 241   histo->SetXTitle("#eta");
 242   histo->Sumw2();
 243   fhistoList->Add(histo);
 244   delete histoname;
 245   delete histotitle;
 246 }
 247 void AliAnalysisHadEt::FillHisto1D(TString histname, Float_t x, Float_t weight)
 248 {//fills a 1d histogram with the name histoname with the value x and the weight "weight"
 249   TH1F     *histo;
 250   TString  *name   = new TString();
 251   name->Append(histname);
 252   histo = (TH1F *)fhistoList->FindObject(name->Data());
 253   if(histo){
 254     histo->Fill((Double_t)x, weight);
 255   }
 256   else{cerr<<"CorrelationMaker::FillHisto1D: no histogram "<< name->Data()<<endl;}
 257   delete name;
 258 }
 259 void AliAnalysisHadEt::FillHisto2D(TString histname, Float_t x, Float_t y, Float_t weight)
 260 {//fills a 2d histogram with the name histoname with the value x and the weight "weight"
 261   TH2F     *histo;
 262   TString  *name   = new TString();
 263   name->Append(histname);
 264   histo = (TH2F *)fhistoList->FindObject(name->Data());
 265   if(histo){
 266     histo->Fill((Double_t)x,(Double_t)y, weight);
 267   }
 268   else{cerr<<"CorrelationMaker::FillHisto2D: no histogram "<< name->Data()<<endl;}
 269   delete name;
 270 }
 271
 272
 273 Float_t AliAnalysisHadEt::Et(TParticle *part, float mass){//function to calculate et in the same way as it would be calculated in a calorimeter
 274   if(mass+1000<0.01){//if no mass given return default.  The default argument is -1000
 275     if(TMath::Abs(part->GetPDG(0)->PdgCode())==2212 || TMath::Abs(part->GetPDG(0)->PdgCode())==2112){
 276       if(part->GetPDG(0)->PdgCode()==-2212 || part->GetPDG(0)->PdgCode()==-2112){//antiproton or antineutron
 277         //for antinucleons we specifically want to return the kinetic energy plus twice the rest mass
 278         return (part->Energy()+part->GetMass())*TMath::Sin(part->Theta());
 279       }
 280       if(part->GetPDG(0)->PdgCode()==2212 || part->GetPDG(0)->PdgCode()==2112){//proton or neutron
 281         //for nucleons we specifically want to return the kinetic energy only
 282         return (part->Energy()-part->GetMass())*TMath::Sin(part->Theta());
 283       }
 284     }
 285     else{//otherwise go to the default
 286       return part->Energy()*TMath::Sin(part->Theta());
 287     }
 288   }
 289   else{//otherwise use the mass that was given
 290     return (TMath::Sqrt(TMath::Power(part->P(),2.0)+TMath::Power(mass,2.0)))*TMath::Sin(part->Theta());
 291   }
 292   return 0.0;
 293 }
 294 Float_t AliAnalysisHadEt::Et(Float_t p, Float_t theta, Int_t pid, Short_t charge) const {//function to calculate et in the same way as it would be calculated in a calorimeter
 295   if(pid==AliAnalysisEtCommon::fgPiPlusCode || pid==AliAnalysisEtCommon::fgPiMinusCode){//Nothing special for pions
 296     return TMath::Sqrt(p*p + fgPionMass*fgPionMass) * TMath::Sin(theta);
 297   }
 298   if(pid==AliAnalysisEtCommon::fgKPlusCode || pid==AliAnalysisEtCommon::fgKMinusCode){//Nothing special for kaons
 299     return TMath::Sqrt(p*p + AliAnalysisEtCommon::fgKaonMass*AliAnalysisEtCommon::fgKaonMass) * TMath::Sin(theta);
 300   }
 301   if(pid==AliAnalysisEtCommon::fgEPlusCode || pid==AliAnalysisEtCommon::fgEMinusCode){//Nothing special for electrons
 302     return TMath::Sqrt(p*p + AliAnalysisEtCommon::fgElectronMass*AliAnalysisEtCommon::fgElectronMass) * TMath::Sin(theta);
 303   }
 304   if(pid==AliAnalysisEtCommon::fgProtonCode || pid==AliAnalysisEtCommon::fgAntiProtonCode){//But for protons we must be careful...
 305     if(charge<0.0){//antiprotns: kinetic energy plus twice the rest mass
 306       return (TMath::Sqrt(p*p + AliAnalysisEtCommon::fgProtonMass*AliAnalysisEtCommon::fgProtonMass) + AliAnalysisEtCommon::fgProtonMass) * TMath::Sin(theta);
 307     }
 308     if(charge>0.0){//antiprotns: kinetic energy only
 309       return (TMath::Sqrt(p*p + AliAnalysisEtCommon::fgProtonMass*AliAnalysisEtCommon::fgProtonMass) - AliAnalysisEtCommon::fgProtonMass) * TMath::Sin(theta);
 310     }
 311   }
 312   //cerr<<"Uh-oh!  Et not set properly!"<<endl;
 313   return 0.0;
 314 }
 315
 316 Float_t AliAnalysisHadEt::TrueP(float pTrec) const {
 317   if(pTrec>1.0) return pTrec;
 318   return pTrec/(1-599.334*pTrec+7285.15*pTrec*pTrec)+pTrec;
 319 }