PWG4/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
  28 using namespace std;
  29
  30 ClassImp(AliAnalysisHadEt);
  31
  32
  33 Int_t AliAnalysisHadEt::fgnumOfEtaBins = 16;
  34 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};
  35 Int_t AliAnalysisHadEt::fgNumOfPtBins = 111;
  36 Float_t AliAnalysisHadEt::fgPtAxis[117]=
  37   {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,
  38    0.2, .22, .24, .26, .28, 0.30, 0.32, .34, .36, .38, 0.40, .42, .44, .46, .48,
  39    0.5, .52, .54, .56, .58, 0.60, 0.62, .64, .66, .68, 0.70, .72, .74, .76, .78,
  40    .80, .82, .84, .86, .88, 0.90, 0.92, .94, .96, .98, 1.00,1.05, 1.1,1.15, 1.2,
  41   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,
  42    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,
  43    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,
  44   20.0,25.0,30.0,35.0,40.0, 45.0, 50.0};
  45 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,
  46                                            -0.050,-0.045,-0.040,-0.035,-0.030,-0.025,-0.024,-0.023,-0.022,-0.021,
  47                                            -0.020,-0.019,-0.018,-0.017,-0.016,-0.015,-0.014,-0.013,-0.012,-0.011,
  48                                            -0.010,-0.009,-0.008,-0.007,-0.006,-0.005,-0.004,-0.003,-0.002,-0.001,
  49                                            -0.000,0.001,0.002,0.003,0.004,0.005,0.006,0.007,0.008,0.009,
  50                                            0.010,0.011,0.012,0.013,0.014,0.015,0.016,0.017,0.018,0.019,
  51                                            0.020,0.021,0.022,0.023,0.024,0.025,0.030,0.035,0.040,0.045,
  52                                            0.050,0.060,0.070,0.080,0.090,0.100,0.110,0.120,0.130,0.140,
  53                                            0.150,};
  54 // 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};
  55 Int_t AliAnalysisHadEt::fgNumOfResBins = 80;
  56
  57
  58 AliAnalysisHadEt::AliAnalysisHadEt() : AliAnalysisEtCommon()
  59                                      ,fSumEt(0)
  60                                      ,fSumEtAcc(0)
  61                                      ,fTotEt(0)
  62                                      ,fTotEtAcc(0)
  63                                      ,fTotNeutralEt(0)
  64                                      ,fTotNeutralEtAcc(0)
  65                                      ,fTotChargedEt(0)
  66                                      ,fTotChargedEtAcc(0)
  67                                      ,fMultiplicity(0)
  68                                      ,fChargedMultiplicity(0)
  69                                      ,fNeutralMultiplicity(0)
  70                                      ,fhistoList(0)
  71                                      ,fGoodEvent(0)
  72 {//default constructor
  73
  74 }
  75
  76 AliAnalysisHadEt::~AliAnalysisHadEt()
  77 {//destructor
  78   delete fEsdtrackCutsITSTPC;
  79   delete fEsdtrackCutsITS;
  80   delete fEsdtrackCutsTPC;
  81 }
  82
  83 Int_t AliAnalysisHadEt::AnalyseEvent(AliVEvent *event)
  84 { //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.
  85   AliAnalysisEtCommon::AnalyseEvent(event);
  86   ResetEventValues();
  87   return 0;
  88 }
  89
  90
  91 void AliAnalysisHadEt::Init()
  92 {// clear variables, set up cuts and PDG info
  93   AliAnalysisEtCommon::Init();
  94 }
  95
  96 void AliAnalysisHadEt::ResetEventValues()
  97 {//Resets event values of et to zero
  98   AliAnalysisEtCommon::ResetEventValues();
  99   fTotEt = 0;
 100   fTotEtAcc = 0;
 101   fTotNeutralEt = 0;
 102   fTotNeutralEtAcc = 0;
 103   fTotChargedEt  = 0;
 104   fTotChargedEtAcc = 0;
 105   fMultiplicity = 0;
 106   fChargedMultiplicity = 0;
 107   fNeutralMultiplicity = 0;
 108
 109 }
 110 void AliAnalysisHadEt::CreateEtaPtHisto2D(TString name, TString title)
 111 {     //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
 112   TString *histoname   = new TString();
 113   TString *histotitle   = new TString();
 114
 115   histoname->Append(name);
 116   histotitle->Append(title);
 117
 118   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgnumOfEtaBins, fgEtaAxis);
 119   histo->SetYTitle("#eta");
 120   histo->SetXTitle("p_{T}");
 121   histo->SetZTitle("E_{T}");
 122   histo->Sumw2();
 123   fhistoList->Add(histo);
 124   delete histoname;
 125   delete histotitle;
 126
 127 }
 128 void AliAnalysisHadEt::CreateResolutionPtHisto2D(TString name, TString title, TString xtitle, TString ytitle)
 129 {     //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
 130   TString *histoname   = new TString();
 131   TString *histotitle   = new TString();
 132
 133   histoname->Append(name);
 134   histotitle->Append(title);
 135
 136   //TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgNumOfResBins, fgResAxis);
 137   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgNumOfResBins, fgResAxis);
 138   histo->SetYTitle(ytitle);
 139   histo->SetXTitle(xtitle);
 140   histo->SetZTitle("Number of entries");
 141   histo->Sumw2();
 142   fhistoList->Add(histo);
 143   delete histoname;
 144   delete histotitle;
 145
 146 }
 147 void AliAnalysisHadEt::CreatePtHisto1D(TString name, TString title, TString xtitle, TString ytitle)
 148 {     //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
 149   TString *histoname   = new TString();
 150   TString *histotitle   = new TString();
 151
 152   histoname->Append(name);
 153   histotitle->Append(title);
 154
 155   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis);
 156   histo->SetYTitle(ytitle);
 157   histo->SetXTitle(xtitle);
 158   histo->Sumw2();
 159   fhistoList->Add(histo);
 160   delete histoname;
 161   delete histotitle;
 162
 163 }
 164
 165 void AliAnalysisHadEt::CreateHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Float_t xlow,Float_t xhigh)
 166 {     //creates a 1d histogram of the given dimensions and adds it to the list of histograms to be saved
 167   TString *histoname   = new TString();
 168   TString *histotitle   = new TString();
 169   histoname->Append(name);
 170   histotitle->Append(title);
 171   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
 172   histo->SetYTitle(ytitle);
 173   histo->SetXTitle(xtitle);
 174   histo->Sumw2();
 175   fhistoList->Add(histo);
 176   delete histoname;
 177   delete histotitle;
 178 }
 179 void AliAnalysisHadEt::CreateIntHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Int_t xlow,Int_t xhigh)
 180 {     //creates a 1d integer histogram and adds it to the list of histograms to be saved
 181   TString *histoname   = new TString();
 182   TString *histotitle   = new TString();
 183   histoname->Append(name);
 184   histotitle->Append(title);
 185   TH1I *histo = new TH1I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
 186   histo->SetYTitle(ytitle);
 187   histo->SetXTitle(xtitle);
 188   histo->Sumw2();
 189   fhistoList->Add(histo);
 190   delete histoname;
 191   delete histotitle;
 192
 193 }
 194 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)
 195 {     //creates a 2d histogram and adds it to the list of histograms to be saved
 196   TString *histoname   = new TString();
 197   TString *histotitle   = new TString();
 198   histoname->Append(name);
 199   histotitle->Append(title);
 200   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
 201   histo->SetYTitle(ytitle);
 202   histo->SetXTitle(xtitle);
 203   histo->Sumw2();
 204   fhistoList->Add(histo);
 205   delete histoname;
 206   delete histotitle;
 207
 208 }
 209 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)
 210 {     //creates a 2-d integer histogram and adds it to the list of histograms to be saved
 211   TString *histoname   = new TString();
 212   TString *histotitle   = new TString();
 213   histoname->Append(name);
 214   histotitle->Append(title);
 215   TH2I *histo = new TH2I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
 216   histo->SetYTitle(ytitle);
 217   histo->SetXTitle(xtitle);
 218   histo->Sumw2();
 219   fhistoList->Add(histo);
 220   delete histoname;
 221   delete histotitle;
 222
 223 }
 224
 225 void AliAnalysisHadEt::CreateEtaHisto1D(TString name, TString title)
 226 {     //creates 1d histogram in eta and adds it to the list of histograms to be saved
 227   TString *histoname   = new TString();
 228   TString *histotitle   = new TString();
 229   histoname->Append(name);
 230   histotitle->Append(title);
 231   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),fgnumOfEtaBins, fgEtaAxis);
 232   histo->SetYTitle("E_{T}");
 233   histo->SetXTitle("#eta");
 234   histo->Sumw2();
 235   fhistoList->Add(histo);
 236   delete histoname;
 237   delete histotitle;
 238 }
 239 void AliAnalysisHadEt::FillHisto1D(TString histname, Float_t x, Float_t weight)
 240 {//fills a 1d histogram with the name histoname with the value x and the weight "weight"
 241   TH1F     *histo;
 242   TString  *name   = new TString();
 243   name->Append(histname);
 244   histo = (TH1F *)fhistoList->FindObject(name->Data());
 245   if(histo){
 246     histo->Fill((Double_t)x, weight);
 247   }
 248   else{cerr<<"CorrelationMaker::FillHisto1D: no histogram "<< name->Data()<<endl;}
 249   delete name;
 250 }
 251 void AliAnalysisHadEt::FillHisto2D(TString histname, Float_t x, Float_t y, Float_t weight)
 252 {//fills a 2d histogram with the name histoname with the value x and the weight "weight"
 253   TH2F     *histo;
 254   TString  *name   = new TString();
 255   name->Append(histname);
 256   histo = (TH2F *)fhistoList->FindObject(name->Data());
 257   if(histo){
 258     histo->Fill((Double_t)x,(Double_t)y, weight);
 259   }
 260   else{cerr<<"CorrelationMaker::FillHisto2D: no histogram "<< name->Data()<<endl;}
 261   delete name;
 262 }
 263
 264
 265 Float_t AliAnalysisHadEt::Et(TParticle *part, float mass){//function to calculate et in the same way as it would be calculated in a calorimeter
 266   if(mass+1000<0.01){//if no mass given return default.  The default argument is -1000
 267     if(TMath::Abs(part->GetPDG(0)->PdgCode())==2212 || TMath::Abs(part->GetPDG(0)->PdgCode())==2112){
 268       if(part->GetPDG(0)->PdgCode()==-2212 || part->GetPDG(0)->PdgCode()==-2112){//antiproton or antineutron
 269         //for antinucleons we specifically want to return the kinetic energy plus twice the rest mass
 270         return (part->Energy()+part->GetMass())*TMath::Sin(part->Theta());
 271       }
 272       if(part->GetPDG(0)->PdgCode()==2212 || part->GetPDG(0)->PdgCode()==2112){//proton or neutron
 273         //for nucleons we specifically want to return the kinetic energy only
 274         return (part->Energy()-part->GetMass())*TMath::Sin(part->Theta());
 275       }
 276     }
 277     else{//otherwise go to the default
 278       return part->Energy()*TMath::Sin(part->Theta());
 279     }
 280   }
 281   else{//otherwise use the mass that was given
 282     return (TMath::Sqrt(TMath::Power(part->P(),2.0)+TMath::Power(mass,2.0)))*TMath::Sin(part->Theta());
 283   }
 284   return 0.0;
 285 }
 286 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
 287   if(pid==AliAnalysisEtCommon::fgPiPlusCode || pid==AliAnalysisEtCommon::fgPiMinusCode){//Nothing special for pions
 288     return TMath::Sqrt(p*p + fgPionMass*fgPionMass) * TMath::Sin(theta);
 289   }
 290   if(pid==AliAnalysisEtCommon::fgKPlusCode || pid==AliAnalysisEtCommon::fgKMinusCode){//Nothing special for kaons
 291     return TMath::Sqrt(p*p + AliAnalysisEtCommon::fgKaonMass*AliAnalysisEtCommon::fgKaonMass) * TMath::Sin(theta);
 292   }
 293   if(pid==AliAnalysisEtCommon::fgEPlusCode || pid==AliAnalysisEtCommon::fgEMinusCode){//Nothing special for electrons
 294     return TMath::Sqrt(p*p + AliAnalysisEtCommon::fgElectronMass*AliAnalysisEtCommon::fgElectronMass) * TMath::Sin(theta);
 295   }
 296   if(pid==AliAnalysisEtCommon::fgProtonCode || pid==AliAnalysisEtCommon::fgAntiProtonCode){//But for protons we must be careful...
 297     if(charge<0.0){//antiprotns: kinetic energy plus twice the rest mass
 298       return (TMath::Sqrt(p*p + AliAnalysisEtCommon::fgProtonMass*AliAnalysisEtCommon::fgProtonMass) + AliAnalysisEtCommon::fgProtonMass) * TMath::Sin(theta);
 299     }
 300     if(charge>0.0){//antiprotns: kinetic energy only
 301       return (TMath::Sqrt(p*p + AliAnalysisEtCommon::fgProtonMass*AliAnalysisEtCommon::fgProtonMass) - AliAnalysisEtCommon::fgProtonMass) * TMath::Sin(theta);
 302     }
 303   }
 304   //cerr<<"Uh-oh!  Et not set properly!"<<endl;
 305   return 0.0;
 306 }
 307
 308 Float_t AliAnalysisHadEt::TrueP(float pTrec){
 309   if(pTrec>1.0) return pTrec;
 310   return pTrec/(1-599.334*pTrec+7285.15*pTrec*pTrec)+pTrec;
 311 }