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Updated PaintContour() method
[u/mrichter/AliRoot.git] / PWG3 / AliQuarkoniaEfficiency.cxx
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bae80eaf 1//===================================================================
2// Class AliQuarkoniaEfficiency
3//
4// This class will provide the quarkonia reconstruction efficiency
5// in ALICE without acceptance consideration.
6//
7//
8// Reconstruction efficiency has been evaluated by means of a flat
9// y and pt distribution of quarkonia in -4 < y < -2.5,
10// 0 < pt < 20 GeV/c. Weights have been used to evaluate the
11// reconstruction efficiency in different parameterizations.
12//
13// Beware that efficiency histos are preliminary.
14// Just Jpsi, Dimuon, UnlikePair trigger
15// efficiencies should be considered.
16//
17//
18// Example:
19// Double_t eff,error;
20// AliQuarkoniaEfficiency * JPsiEff = new AliQuarkoniaEfficiency();
21// JPsiEff->Init();
22// JPsiEff->GetEfficiency(Rapidity,Pt,eff,error);
23// printf(" eff = %2.2e error %2.2e \n",eff,error);
24//
25//
26// Subatech 2006
27//===================================================================
977e08ed 28
29// Root
977e08ed 30#include "TFile.h"
31#include "TH2.h"
977e08ed 32
33// AliRoot includes
34#include "AliQuarkoniaEfficiency.h"
35#include "AliLog.h"
36
37
bae80eaf 38//_______________________________________________________________________
977e08ed 39AliQuarkoniaEfficiency::AliQuarkoniaEfficiency(Int_t quarkoniaResonance, Int_t decayChannel,
40 Int_t simParameterization):
41 fEfficiencyFileName("QuarkoniaEfficiency.root"),
42 fQuarkoniaResonance(quarkoniaResonance),
43 fDecayChannel(decayChannel),
44 fParameterization(simParameterization),
45 fTriggerType(kPairUnlikeApt),
46 fTrigger(kFALSE),
47 fEfficiency(0x0)
48{
bae80eaf 49 // Constructor
977e08ed 50}
51
bae80eaf 52//_______________________________________________________________________
977e08ed 53AliQuarkoniaEfficiency::~AliQuarkoniaEfficiency()
54{
bae80eaf 55 // Destructor
977e08ed 56 delete fEfficiency;
57}
58
bae80eaf 59//_______________________________________________________________________
977e08ed 60void AliQuarkoniaEfficiency::Init()
61{
bae80eaf 62 // Initialize method
977e08ed 63 switch (fQuarkoniaResonance) {
64 case kJpsi:
65 SetTitle("Jpsi");
66 break;
67 case kPsiP:
68 SetTitle("PsiP");
69 break;
70 case kUpsilon:
71 SetTitle("Upsilon");
72 break;
73 case kUpsilonP:
74 SetTitle("UpsilonP");
75 break;
76 case kUpsilonPP:
77 SetTitle("UpsilonPP");
78 break;
79 case kOmega:
80 SetTitle("Omega");
81 break;
82 case kPhi:
83 SetTitle("Phi");
84 break;
85 }
86
87 switch (fDecayChannel) {
88 case kDimuon:
89 SetName("Dimuon");
90 break;
91 case kDielectron:
92 SetName("Dielectron");
93 break;
94 }
95
96 char *param=0;
97 switch (fParameterization){
98 case kFlat:
99 param = "Flat";
100 break;
101 case kCDFscaled:
102 param = "CDFscaled";
103 break;
104 case kCDFscaledPP:
105 param = "CDFscaledPP";
106 break;
107 }
108
109 char *trig=0;
110 switch (fTriggerType){
111 case kSinglePlusLpt:
112 trig = "SinglePlusLpt";
113 break;
114 case kSinglePlusHpt:
115 trig = "SinglePlusHpt";
116 break;
117 case kSinglePlusApt:
118 trig = "SinglePlusApt";
119 break;
120 case kSingleMinusLpt:
121 trig = "SingleMinusLpt";
122 break;
123 case kSingleMinusHpt:
124 trig = "SingleMinusHpt";
125 break;
126 case kSingleMinusApt:
127 trig = "SingleMinusApt";
128 break;
129 case kSingleUndefLpt:
130 trig = "SingleUndefLpt";
131 break;
132 case kSingleUndefHpt:
133 trig = "SingleUndefHpt";
134 break;
135 case kSingleUndefApt:
136 trig = "SingleUndefApt";
137 break;
138 case kPairUnlikeLpt:
139 trig = "PairUnlikeLpt";
140 break;
141 case kPairUnlikeHpt:
142 trig = "PairUnlikeHpt";
143 break;
144 case kPairUnlikeApt:
145 trig = "PairUnlikeApt";
146 break;
147 case kPairLikeLpt:
148 trig = "PairLikeLpt";
149 break;
150 case kPairLikeHpt:
151 trig = "PairLikeHpt";
152 break;
153 case kPairLikeApt:
154 trig = "PairLikeApt";
155 break;
156 }
157
158
159 if(!fEfficiency) delete fEfficiency;
160
161 TFile efficiencyFile(fEfficiencyFileName);
162 if ( efficiencyFile.IsOpen() ) {
163
164 char quarkoniaDir[15];
165 sprintf(quarkoniaDir,"%s",GetTitle());
166 if (! efficiencyFile.cd(quarkoniaDir) ){
167 AliError(Form("Directory %s not found in file %s \n Efficiency data for quarkonia %s and channel %s not found ",
168 quarkoniaDir,fEfficiencyFileName.Data(),GetTitle(),GetName() ));
169 return;
170 }
171
172 char histosDir[30];
173 sprintf(histosDir,"%s/%s_%s_%s",quarkoniaDir,GetTitle(),GetName(),param);
174 if(! efficiencyFile.cd(histosDir) ){
175 AliError(Form("Subdirectory %s/%s not found in file %s \n Efficiency data for quarkonia %s and channel %s not found ",
176 quarkoniaDir,histosDir,fEfficiencyFileName.Data(),GetTitle(),GetName() ));
177 return;
178 }
179
180 char histoname[50];
181 if(fTrigger) sprintf(histoname,"h%sEfficiencyPtRap_%s",GetTitle(),trig);
182 else sprintf(histoname,"h%sEfficiencyPtRap",GetTitle());
183 char histonameposition[99];
184 sprintf(histonameposition,"%s/%s",histosDir,histoname);
185 fEfficiency = (TH2F*)efficiencyFile.Get(histonameposition);
186
187 if ( !fEfficiency ) {
188 AliError(Form("Histo %s not found in file %s \n Efficiency data for quarkonia %s and channel %s not found",
189 histoname,GetTitle(), GetName() ));
190 }
191 else {
192 fEfficiency->SetDirectory(0);
193 }
194 efficiencyFile.Close();
195
196 }
197 else {
198 AliError(Form("File %s not found",fEfficiencyFileName.Data()));
199 }
200
201}
202
bae80eaf 203//_______________________________________________________________________
977e08ed 204TH2F* AliQuarkoniaEfficiency::GetEfficiencyHisto() const
205{
bae80eaf 206 // Returns the efficiency histogram
977e08ed 207 if (fEfficiency) return fEfficiency;
208 else {
209 AliError(Form("Efficiency data for quarkonia %s and channel %s not found",GetTitle(),GetName()));
210 return 0x0;
211 }
212}
213
bae80eaf 214//_______________________________________________________________________
977e08ed 215void AliQuarkoniaEfficiency::GetEfficiency(Float_t rap, Float_t pT, Double_t &eff, Double_t &error)
216{
bae80eaf 217 // Evaluates the efficiency for a given (y,Pt) of the quarkonia
977e08ed 218 Int_t binx=0;
219 Int_t biny=0;
220
221 if (!fEfficiency) {
222 AliError(Form("Efficiency data for quarkonia %s and channel %s not found",GetTitle(),GetName()));
223 }
224 else {
225 if ( rap < (fEfficiency->GetXaxis())->GetXmin() ||
226 rap > (fEfficiency->GetXaxis())->GetXmax() ||
227 pT < (fEfficiency->GetYaxis())->GetXmin() ||
228 pT > (fEfficiency->GetYaxis())->GetXmax() ) {
229 AliInfo("Values out of range");
230 eff = 0.;
231 error = 0.;
232 }
233 else {
234 binx = fEfficiency->GetXaxis()->FindBin(rap);
235 biny = fEfficiency->GetYaxis()->FindBin(pT);
236 eff = fEfficiency->GetBinContent(binx,biny);
237 error = fEfficiency->GetBinError(binx,biny);
238 }
239 }
240}