1 //Created by Christine Nattrass, Rebecca Scott, Irakli Martashvili
2 //University of Tennessee at Knoxville
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
12 #include "AliAnalysisHadEt.h"
18 #include "AliAnalysisEtCuts.h"
19 #include "AliMCEvent.h"
20 #include "AliVEvent.h"
22 #include "AliESDtrackCuts.h"
23 #include "TDatabasePDG.h"
24 #include "TParticle.h"
30 ClassImp(AliAnalysisHadEt);
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};
47 AliAnalysisHadEt::AliAnalysisHadEt() : AliAnalysisEtCommon()
48 ,fHistogramNameSuffix("")
58 ,fChargedMultiplicity(0)
59 ,fNeutralMultiplicity(0)
61 {//default constructor
65 AliAnalysisHadEt::~AliAnalysisHadEt()
67 delete fEsdtrackCutsITSTPC;
68 delete fEsdtrackCutsITS;
69 delete fEsdtrackCutsTPC;
72 Int_t AliAnalysisHadEt::AnalyseEvent(AliVEvent *event)
73 { //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.
74 AliAnalysisEtCommon::AnalyseEvent(event);
80 void AliAnalysisHadEt::Init()
81 {// clear variables, set up cuts and PDG info
82 AliAnalysisEtCommon::Init();
85 void AliAnalysisHadEt::ResetEventValues()
86 {//Resets event values of et to zero
87 AliAnalysisEtCommon::ResetEventValues();
95 fChargedMultiplicity = 0;
96 fNeutralMultiplicity = 0;
99 void AliAnalysisHadEt::CreateEtaPtHisto2D(TString name, TString title)
100 { //creates a 2-d histogram in eta and phi and adds it to the list of histograms to be saved
101 TString *histoname = new TString();
102 TString *histotitle = new TString();
104 histoname->Append(name);
105 histotitle->Append(title);
107 TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),fgNumOfPtBins, fgPtAxis, fgnumOfEtaBins, fgEtaAxis);
108 histo->SetYTitle("#eta");
109 histo->SetXTitle("p_{T}");
110 histo->SetZTitle("E_{T}");
112 fhistoList->Add(histo);
118 void AliAnalysisHadEt::CreateHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Float_t xlow,Float_t xhigh)
119 { //creates a 1d histogram of the given dimensions and adds it to the list of histograms to be saved
120 TString *histoname = new TString();
121 TString *histotitle = new TString();
122 histoname->Append(name);
123 histotitle->Append(title);
124 TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
125 histo->SetYTitle(ytitle);
126 histo->SetXTitle(xtitle);
128 fhistoList->Add(histo);
132 void AliAnalysisHadEt::CreateIntHisto1D(TString name, TString title, TString xtitle, TString ytitle,Int_t xbins, Int_t xlow,Int_t xhigh)
133 { //creates a 1d integer histogram and adds it to the list of histograms to be saved
134 TString *histoname = new TString();
135 TString *histotitle = new TString();
136 histoname->Append(name);
137 histotitle->Append(title);
138 TH1I *histo = new TH1I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh);
139 histo->SetYTitle(ytitle);
140 histo->SetXTitle(xtitle);
142 fhistoList->Add(histo);
147 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)
148 { //creates a 2d histogram and adds it to the list of histograms to be saved
149 TString *histoname = new TString();
150 TString *histotitle = new TString();
151 histoname->Append(name);
152 histotitle->Append(title);
153 TH2F *histo = new TH2F(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
154 histo->SetYTitle(ytitle);
155 histo->SetXTitle(xtitle);
157 fhistoList->Add(histo);
162 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)
163 { //creates a 2-d integer histogram and adds it to the list of histograms to be saved
164 TString *histoname = new TString();
165 TString *histotitle = new TString();
166 histoname->Append(name);
167 histotitle->Append(title);
168 TH2I *histo = new TH2I(histoname->Data(),histotitle->Data(),xbins,xlow,xhigh,ybins,ylow,yhigh);
169 histo->SetYTitle(ytitle);
170 histo->SetXTitle(xtitle);
172 fhistoList->Add(histo);
178 void AliAnalysisHadEt::CreateEtaHisto1D(TString name, TString title)
179 { //creates 1d histogram in eta and adds it to the list of histograms to be saved
180 TString *histoname = new TString();
181 TString *histotitle = new TString();
182 histoname->Append(name);
183 histotitle->Append(title);
184 TH1F *histo = new TH1F(histoname->Data(),histotitle->Data(),fgnumOfEtaBins, fgEtaAxis);
185 histo->SetYTitle("E_{T}");
186 histo->SetXTitle("#eta");
188 fhistoList->Add(histo);
192 void AliAnalysisHadEt::FillHisto1D(TString histname, Float_t x, Float_t weight)
193 {//fills a 1d histogram with the name histoname with the value x and the weight "weight"
195 TString *name = new TString();
196 name->Append(histname);
197 histo = (TH1F *)fhistoList->FindObject(name->Data());
199 histo->Fill((Double_t)x, weight);
201 else{cerr<<"CorrelationMaker::FillHisto1D: no histogram "<< name->Data()<<endl;}
204 void AliAnalysisHadEt::FillHisto2D(TString histname, Float_t x, Float_t y, Float_t weight)
205 {//fills a 2d histogram with the name histoname with the value x and the weight "weight"
207 TString *name = new TString();
208 name->Append(histname);
209 histo = (TH2F *)fhistoList->FindObject(name->Data());
211 histo->Fill((Double_t)x,(Double_t)y, weight);
213 else{cerr<<"CorrelationMaker::FillHisto2D: no histogram "<< name->Data()<<endl;}
218 Float_t AliAnalysisHadEt::Et(TParticle *part, float mass){//function to calculate et in the same way as it would be calculated in a calorimeter
219 if(mass+1000<0.01){//if no mass given return default. The default argument is -1000
220 if(TMath::Abs(part->GetPDG(0)->PdgCode())==2212 || TMath::Abs(part->GetPDG(0)->PdgCode())==2112){
221 if(part->GetPDG(0)->PdgCode()==-2212 || part->GetPDG(0)->PdgCode()==-2112){//antiproton or antineutron
222 //for antinucleons we specifically want to return the kinetic energy plus twice the rest mass
223 return (part->Energy()+part->GetMass())*TMath::Sin(part->Theta());
225 if(part->GetPDG(0)->PdgCode()==2212 || part->GetPDG(0)->PdgCode()==2112){//proton or neutron
226 //for nucleons we specifically want to return the kinetic energy only
227 return (part->Energy()-part->GetMass())*TMath::Sin(part->Theta());
230 else{//otherwise go to the default
231 return part->Energy()*TMath::Sin(part->Theta());
234 else{//otherwise use the mass that was given
235 return (TMath::Sqrt(TMath::Power(part->P(),2.0)+TMath::Power(mass,2.0)))*TMath::Sin(part->Theta());
239 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
240 if(pid==AliAnalysisEtCommon::fgPiPlusCode || pid==AliAnalysisEtCommon::fgPiMinusCode){//Nothing special for pions
241 return TMath::Sqrt(p*p + fgPionMass*fgPionMass) * TMath::Sin(theta);
243 if(pid==AliAnalysisEtCommon::fgKPlusCode || pid==AliAnalysisEtCommon::fgKMinusCode){//Nothing special for kaons
244 return TMath::Sqrt(p*p + AliAnalysisEtCommon::fgKaonMass*AliAnalysisEtCommon::fgKaonMass) * TMath::Sin(theta);
246 if(pid==AliAnalysisEtCommon::fgEPlusCode || pid==AliAnalysisEtCommon::fgEMinusCode){//Nothing special for electrons
247 return TMath::Sqrt(p*p + AliAnalysisEtCommon::fgElectronMass*AliAnalysisEtCommon::fgElectronMass) * TMath::Sin(theta);
249 if(pid==AliAnalysisEtCommon::fgProtonCode || pid==AliAnalysisEtCommon::fgAntiProtonCode){//But for protons we must be careful...
250 if(charge<0.0){//antiprotns: kinetic energy plus twice the rest mass
251 return (TMath::Sqrt(p*p + AliAnalysisEtCommon::fgProtonMass*AliAnalysisEtCommon::fgProtonMass) + AliAnalysisEtCommon::fgProtonMass) * TMath::Sin(theta);
253 if(charge>0.0){//antiprotns: kinetic energy only
254 return (TMath::Sqrt(p*p + AliAnalysisEtCommon::fgProtonMass*AliAnalysisEtCommon::fgProtonMass) - AliAnalysisEtCommon::fgProtonMass) * TMath::Sin(theta);
257 cerr<<"Uh-oh! Et not set properly!"<<endl;