e0cc8ef2ea0d2da48f537122d857f5c1cd6f71e6
[u/mrichter/AliRoot.git] / 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) const {
309   if(pTrec>1.0) return pTrec;
310   return pTrec/(1-599.334*pTrec+7285.15*pTrec*pTrec)+pTrec;
311 }