PWG4/totEt/AliAnalysisHadEt.cxx

   1 //Create by Christine Nattrass, Rebecca Scott, Irakli Martashvili
   2 //University of Tennessee at Knoxville
   3 //This class is designed for the analysis of the hadronic component of transverse energy.  It is used by AliAnalysisTaskHadEt.
   4 //This gets information about the hadronic component of the transverse energy from tracks reconstructed in an event
   5 //it has daughters, AliAnalysisHadEtMonteCarlo and AliAnalysisHadEtReconstructed, which loop over either Monte Carlo data or real data to get Et
   6 #include "AliAnalysisHadEt.h"
   7 #include "TMath.h"
   8 #include "TList.h"
   9 #include "TH1F.h"
  10 #include "TH2F.h"
  11 #include <iostream>
  12 #include "AliAnalysisEtCuts.h"
  13 #include "AliMCEvent.h"
  14 #include "AliVEvent.h"
  15 #include "AliStack.h"
  16 #include "AliESDtrackCuts.h"
  17 #include "TDatabasePDG.h"
  18 #include "TParticle.h"
  19 #include "Rtypes.h"
  20
  21 using namespace std;
  22
  23 ClassImp(AliAnalysisHadEt);
  24
  25
  26 Int_t AliAnalysisHadEt::fgnumOfEtaBins = 46;
  27 Float_t AliAnalysisHadEt::fgEtaAxis[47]={-0.78, -0.74, -0.7, -0.66, -0.62, -0.58, -0.54, -0.5, -0.46, -0.42, -0.38, -0.34, -0.3, -0.26, -0.22, -0.18, -0.14, -0.12, -0.1, -0.08, -0.06, -0.04, -0.02, -0.0, 0.02, 0.04, 0.06, 0.08, 0.1, 0.12, 0.14, 0.18, 0.22, 0.26, 0.3, 0.34, 0.38, 0.42, 0.46, 0.5, 0.54, 0.58, 0.62, 0.66, 0.7, 0.74, 0.78};
  28 Int_t AliAnalysisHadEt::fgNumOfPtBins = 111;
  29 Float_t AliAnalysisHadEt::fgPtAxis[117]=
  30   {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,
  31    0.2, .22, .24, .26, .28, 0.30, 0.32, .34, .36, .38, 0.40, .42, .44, .46, .48,
  32    0.5, .52, .54, .56, .58, 0.60, 0.62, .64, .66, .68, 0.70, .72, .74, .76, .78,
  33    .80, .82, .84, .86, .88, 0.90, 0.92, .94, .96, .98, 1.00,1.05, 1.1,1.15, 1.2,
  34   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,
  35    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,
  36    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,
  37   20.0,25.0,30.0,35.0,40.0, 45.0, 50.0};
  38
  39 AliAnalysisHadEt::AliAnalysisHadEt() :
  40         fHistogramNameSuffix("")
  41         ,fPdgDB(0)
  42         ,fPiPlusCode(0)
  43         ,fPiMinusCode(0)
  44         ,fKPlusCode(0)
  45         ,fKMinusCode(0)
  46         ,fProtonCode(0)
  47         ,fAntiProtonCode(0)
  48         ,fLambdaCode(0)
  49         ,fAntiLambdaCode(0)
  50         ,fK0SCode(0)
  51         ,fOmegaCode(0)
  52         ,fAntiOmegaCode(0)
  53         ,fXi0Code(0)
  54         ,fAntiXi0Code(0)
  55         ,fXiCode(0)
  56         ,fAntiXiCode(0)
  57         ,fSigmaCode(0)
  58         ,fAntiSigmaCode(0)
  59         ,fK0LCode(0)
  60         ,fNeutronCode(0)
  61         ,fAntiNeutronCode(0)
  62         ,fEPlusCode(0)
  63         ,fEMinusCode(0)
  64         ,fPionMass(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         ,fEtaCut(EtCommonCuts::kEtaCut)
  77         ,fEtaCutAcc(0)
  78                                   //,fPhiCutAccMin(0)
  79                                   //,fPhiCutAccMax(360.)
  80         ,fVertexXCut(0)
  81         ,fVertexYCut(0)
  82         ,fVertexZCut(0)
  83                                   ,fIPxyCut(0)
  84                                   ,fIPzCut(0)
  85                                   //,fSingleCellEnergyCut(0)
  86                                   //,fClusterEnergyCut(EtCommonCuts::kClusterEnergyCut)
  87                                   //,fTrackPtCut(EtCommonCuts::kTrackPtCut)
  88         ,ffesdtrackCutsITSTPC(0)
  89         ,fesdtrackCutsTPC(0)
  90         ,fesdtrackCutsITS(0)
  91         ,fhistoList(0)
  92 {//default constructor
  93
  94 }
  95
  96 AliAnalysisHadEt::~AliAnalysisHadEt()
  97 {//destructor
  98
  99 }
 100
 101 Int_t AliAnalysisHadEt::AnalyseEvent(AliVEvent *event)
 102 { //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.
 103   cout<<"This event has "<<event->GetNumberOfTracks()<<" tracks"<<endl;
 104      ResetEventValues();
 105      AliMCEvent *mcEvent = dynamic_cast<AliMCEvent*>(event);
 106
 107     // Let's play with the stack!
 108     AliStack *stack = mcEvent->Stack();
 109
 110     Int_t nPrim = stack->GetNtrack();
 111
 112     for (Int_t iPart = 0; iPart < nPrim; iPart++)
 113     {
 114
 115         TParticle *part = stack->Particle(iPart);
 116
 117         if (!part)
 118           {
 119             Printf("ERROR: Could not get particle %d", iPart);
 120             continue;
 121           }
 122     }
 123   return 0;
 124 }
 125
 126 void AliAnalysisHadEt::FillOutputList()
 127 {//fill the output histogram list with histograms in all AliAnalysisHadEt's
 128 }
 129
 130 void AliAnalysisHadEt::Init()
 131 {//Initiate member vaiables to reasonable values
 132   if(!fPdgDB) fPdgDB = new TDatabasePDG();
 133   //the codes are defined in $ROOTSYS/etc/pdg_table.txt
 134   fPionMass = fPdgDB->GetParticle("pi+")->Mass();
 135   fPiPlusCode = fPdgDB->GetParticle("pi+")->PdgCode();
 136     fPiMinusCode = fPdgDB->GetParticle("pi-")->PdgCode();
 137     fKPlusCode = fPdgDB->GetParticle("K+")->PdgCode();
 138     fKMinusCode = fPdgDB->GetParticle("K-")->PdgCode();
 139     fProtonCode = fPdgDB->GetParticle("proton")->PdgCode();
 140     fAntiProtonCode = fPdgDB->GetParticle("antiproton")->PdgCode();
 141     fLambdaCode = fPdgDB->GetParticle("Lambda0")->PdgCode();
 142     fAntiLambdaCode = fPdgDB->GetParticle("Lambda0_bar")->PdgCode();
 143     fK0SCode = fPdgDB->GetParticle("K_S0")->PdgCode();
 144     fOmegaCode = fPdgDB->GetParticle("Omega-")->PdgCode();
 145     fAntiOmegaCode = fPdgDB->GetParticle("Omega+")->PdgCode();
 146     fXi0Code = fPdgDB->GetParticle("Xi0")->PdgCode();
 147     fAntiXi0Code = fPdgDB->GetParticle("Xi0_bar")->PdgCode();
 148     fXiCode = fPdgDB->GetParticle("Xi-")->PdgCode();
 149     fAntiXiCode = fPdgDB->GetParticle("Xi-_bar")->PdgCode();
 150     fSigmaCode = fPdgDB->GetParticle("Sigma-")->PdgCode();
 151     fAntiSigmaCode = fPdgDB->GetParticle("Sigma+")->PdgCode();
 152     fK0LCode = fPdgDB->GetParticle("K_L0")->PdgCode();
 153     fNeutronCode = fPdgDB->GetParticle("neutron")->PdgCode();
 154     fAntiNeutronCode = fPdgDB->GetParticle("antineutron")->PdgCode();
 155     fEPlusCode = fPdgDB->GetParticle("e+")->PdgCode();
 156     fEMinusCode = fPdgDB->GetParticle("e-")->PdgCode();
 157 }
 158
 159 void AliAnalysisHadEt::CreateHistograms()
 160 {//creates histograms included in all AliAnalysisHadEt's
 161 }
 162
 163 void AliAnalysisHadEt::FillHistograms()
 164 {//Fills histograms filled for all AliAnalysisHadEt's
 165 }
 166
 167 void AliAnalysisHadEt::ResetEventValues()
 168 {//Resets event values of et to zero
 169     fTotEt = 0;
 170     fTotEtAcc = 0;
 171     fTotNeutralEt = 0;
 172     fTotNeutralEtAcc = 0;
 173     fTotChargedEt  = 0;
 174     fTotChargedEtAcc = 0;
 175     fMultiplicity = 0;
 176     fChargedMultiplicity = 0;
 177     fNeutralMultiplicity = 0;
 178 }
 179 void AliAnalysisHadEt::CreateEtaPtHisto2D(TString name, TString title)
 180 {     //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
 181   TString *histoname   = new TString();
 182   TString *histotitle   = new TString();
 183
 184   histoname->Append(name);
 185   histotitle->Append(title);
 186   //TH2F *h1 = new TH2F("h1", "Histogram with Gaussian random distribution", fgNumOfPtBins, ptBinsArray, fgnumOfEtaBins, etaBinsArray);
 187
 188   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgnumOfEtaBins, fgEtaAxis);
 189   histo->SetYTitle("#eta");
 190   histo->SetXTitle("p_{T}");
 191   histo->SetZTitle("E_{T}");
 192   histo->Sumw2();
 193   fhistoList->Add(histo);
 194   delete histoname;
 195   delete histotitle;
 196
 197 }
 198
 199 void AliAnalysisHadEt::CreateHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Float_t xlow,Float_t xhigh)
 200 {     //creates a 1d histogram of the given dimensions and adds it to the list of histograms to be saved
 201   TString *histoname   = new TString();
 202   TString *histotitle   = new TString();
 203
 204   //cout<<"creating "<<name<<endl;
 205
 206   histoname->Append(name);
 207   histotitle->Append(title);
 208   // printf("%s \n ",histoname->Data());
 209   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
 210   histo->SetYTitle(ytitle);
 211   histo->SetXTitle(xtitle);
 212   histo->Sumw2();
 213   fhistoList->Add(histo);
 214   delete histoname;
 215   delete histotitle;
 216
 217 }
 218 void AliAnalysisHadEt::CreateIntHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Int_t xlow,Int_t xhigh)
 219 {     //creates a 1d integer histogram and adds it to the list of histograms to be saved
 220   TString *histoname   = new TString();
 221   TString *histotitle   = new TString();
 222
 223   //cout<<"creating "<<name<<endl;
 224
 225   histoname->Append(name);
 226   histotitle->Append(title);
 227   // printf("%s \n ",histoname->Data());
 228   TH1I *histo = new TH1I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
 229   histo->SetYTitle(ytitle);
 230   histo->SetXTitle(xtitle);
 231   histo->Sumw2();
 232   fhistoList->Add(histo);
 233   delete histoname;
 234   delete histotitle;
 235
 236 }
 237 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)
 238 {     //creates a 2d histogram and adds it to the list of histograms to be saved
 239   TString *histoname   = new TString();
 240   TString *histotitle   = new TString();
 241
 242   //cout<<"creating "<<name<<endl;
 243
 244   histoname->Append(name);
 245   histotitle->Append(title);
 246   // printf("%s \n ",histoname->Data());
 247   TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
 248   histo->SetYTitle(ytitle);
 249   histo->SetXTitle(xtitle);
 250   histo->Sumw2();
 251   fhistoList->Add(histo);
 252   delete histoname;
 253   delete histotitle;
 254
 255 }
 256 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)
 257 {     //creates a 2-d integer histogram and adds it to the list of histograms to be saved
 258   TString *histoname   = new TString();
 259   TString *histotitle   = new TString();
 260
 261   //cout<<"creating "<<name<<endl;
 262
 263   histoname->Append(name);
 264   histotitle->Append(title);
 265   // printf("%s \n ",histoname->Data());
 266   TH2I *histo = new TH2I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
 267   histo->SetYTitle(ytitle);
 268   histo->SetXTitle(xtitle);
 269   histo->Sumw2();
 270   fhistoList->Add(histo);
 271   delete histoname;
 272   delete histotitle;
 273
 274 }
 275
 276 void AliAnalysisHadEt::CreateEtaHisto1D(TString name, TString title)
 277 {     //creates 1d histogram in eta and adds it to the list of histograms to be saved
 278   TString *histoname   = new TString();
 279   TString *histotitle   = new TString();
 280
 281
 282   histoname->Append(name);
 283   histotitle->Append(title);
 284   TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),fgnumOfEtaBins, fgEtaAxis);
 285   histo->SetYTitle("E_{T}");
 286   histo->SetXTitle("#eta");
 287   histo->Sumw2();
 288   fhistoList->Add(histo);
 289   delete histoname;
 290   delete histotitle;
 291
 292 }
 293 void AliAnalysisHadEt::FillHisto1D(TString histname, Float_t x, Float_t weight)
 294 {//fills a 1d histogram with the name histoname with the value x and the weight "weight"
 295   TH1F     *histo;
 296   TString  *name   = new TString();
 297
 298   name->Append(histname);
 299   histo = (TH1F *)fhistoList->FindObject(name->Data());
 300   if(histo){
 301     histo->Fill((Double_t)x, weight);
 302   }
 303   else{cerr<<"CorrelationMaker::FillHisto1D: no histogram "<< name->Data()<<endl;}
 304   delete name;
 305 }
 306 void AliAnalysisHadEt::FillHisto2D(TString histname, Float_t x, Float_t y, Float_t weight)
 307 {//fills a 2d histogram with the name histoname with the value x and the weight "weight"
 308   TH2F     *histo;
 309   TString  *name   = new TString();
 310
 311   name->Append(histname);
 312   histo = (TH2F *)fhistoList->FindObject(name->Data());
 313   if(histo){
 314     histo->Fill((Double_t)x,(Double_t)y, weight);
 315   }
 316   else{cerr<<"CorrelationMaker::FillHisto2D: no histogram "<< name->Data()<<endl;}
 317   delete name;
 318 }
 319
 320
 321 Float_t AliAnalysisHadEt::Et(TParticle *part, float mass){//function to calculate et in the same way as it would be calculated in a calorimeter
 322   if(mass+1000<0.01){//if no mass given return default.  The default argument is -1000
 323     if(TMath::Abs(part->GetPDG(0)->PdgCode())==2212 || TMath::Abs(part->GetPDG(0)->PdgCode())==2112){
 324       if(part->GetPDG(0)->PdgCode()==-2212 || part->GetPDG(0)->PdgCode()==-2112){//antiproton or antineutron
 325         //for antinucleons we specifically want to return the kinetic energy plus twice the rest mass
 326         return (part->Energy()+part->GetMass())*TMath::Sin(part->Theta());
 327       }
 328       if(part->GetPDG(0)->PdgCode()==2212 || part->GetPDG(0)->PdgCode()==2112){//antiproton or antineutron
 329         //for nucleons we specifically want to return the kinetic energy only
 330         return (part->Energy()-part->GetMass())*TMath::Sin(part->Theta());
 331       }
 332     }
 333     else{//otherwise go to the default
 334       return part->Energy()*TMath::Sin(part->Theta());
 335     }
 336   }
 337   else{//otherwise use the mass that was given
 338     return (TMath::Sqrt(TMath::Power(part->P(),2.0)+TMath::Power(mass,2.0)))*TMath::Sin(part->Theta());
 339   }
 340   return 0.0;
 341 }