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9fdb2372 1/**************************************************************************\r
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *\r
3 * *\r
4 * Author: Ana Marin, Kathrin Koch, Kenneth Aamodt *\r
5 * Version 1.0 *\r
6 * *\r
7 * Permission to use, copy, modify and distribute this software and its *\r
8 * documentation strictly for non-commercial purposes is hereby granted *\r
9 * without fee, provided that the above copyright notice appears in all *\r
10 * copies and that both the copyright notice and this permission notice *\r
11 * appear in the supporting documentation. The authors make no claims *\r
12 * about the suitability of this software for any purpose. It is *\r
13 * provided "as is" without express or implied warranty. *\r
14 **************************************************************************/\r
15\r
16////////////////////////////////////////////////\r
17//--------------------------------------------- \r
18// Class used to do analysis on conversion pairs\r
19//---------------------------------------------\r
20////////////////////////////////////////////////\r
21\r
22// root\r
23#include <TChain.h>\r
24\r
25// analysis\r
26#include "AliAnalysisTaskGammaConversion.h"\r
27#include "AliStack.h"\r
28#include "AliLog.h"\r
29#include <vector>\r
30\r
31class AliKFVertex;\r
32class AliAODHandler;\r
33class AliAODEvent;\r
34class ALiESDEvent;\r
35class AliMCEvent;\r
36class AliMCEventHandler;\r
37class AliESDInputHandler;\r
38class AliAnalysisManager;\r
39class Riostream;\r
40class TFile;\r
41class TInterpreter;\r
42class TSystem;\r
43class TROOT;\r
44\r
45ClassImp(AliAnalysisTaskGammaConversion)\r
46\r
47\r
48AliAnalysisTaskGammaConversion::AliAnalysisTaskGammaConversion():\r
49 AliAnalysisTaskSE(),\r
50 fV0Reader(NULL),\r
51 fStack(NULL),\r
52 fOutputContainer(NULL),\r
53 fHistograms(NULL),\r
54 fDoMCTruth(kFALSE),\r
55 fMCAllGammas(),\r
56 fMCPi0s(),\r
57 fMCEtas(),\r
58 fMCGammaChic(),\r
59 fKFReconstructedGammas(),\r
60 fElectronMass(-1),\r
61 fGammaMass(-1),\r
62 fPi0Mass(-1),\r
63 fEtaMass(-1),\r
64 fGammaWidth(-1),\r
65 fPi0Width(-1),\r
66 fEtaWidth(-1),\r
67 fCalculateBackground(kFALSE)\r
68{\r
69 // Default constructor\r
70 // Common I/O in slot 0\r
71 DefineInput (0, TChain::Class());\r
72 DefineOutput(0, TTree::Class());\r
73\r
74 // Your private output\r
75 DefineOutput(1, TList::Class());\r
76}\r
77\r
78AliAnalysisTaskGammaConversion::AliAnalysisTaskGammaConversion(const char* name):\r
79 AliAnalysisTaskSE(name),\r
80 fV0Reader(NULL),\r
81 fStack(NULL),\r
82 fOutputContainer(0x0),\r
83 fHistograms(NULL),\r
84 fDoMCTruth(kFALSE),\r
85 fMCAllGammas(),\r
86 fMCPi0s(),\r
87 fMCEtas(),\r
88 fMCGammaChic(),\r
89 fKFReconstructedGammas(),\r
90 fElectronMass(-1),\r
91 fGammaMass(-1),\r
92 fPi0Mass(-1),\r
93 fEtaMass(-1),\r
94 fGammaWidth(-1),\r
95 fPi0Width(-1),\r
96 fEtaWidth(-1),\r
97 fCalculateBackground(kFALSE)\r
98{\r
99 // Common I/O in slot 0\r
100 DefineInput (0, TChain::Class());\r
101 DefineOutput(0, TTree::Class());\r
102 \r
103 // Your private output\r
104 DefineOutput(1, TList::Class());\r
105}\r
106\r
107AliAnalysisTaskGammaConversion::~AliAnalysisTaskGammaConversion() \r
108{\r
109 // Remove all pointers\r
110 \r
111 if(fOutputContainer){\r
112 fOutputContainer->Clear() ; \r
113 delete fOutputContainer ;\r
114 }\r
115 if(fHistograms){\r
116 delete fHistograms;\r
117 }\r
118 if(fV0Reader){\r
119 delete fV0Reader;\r
120 }\r
121}\r
122\r
123\r
124void AliAnalysisTaskGammaConversion::Init()\r
125{\r
126 // Initialization\r
127}\r
128\r
129\r
130void AliAnalysisTaskGammaConversion::Exec(Option_t */*option*/)\r
131{\r
132 // Execute analysis for current event\r
133 \r
134 ConnectInputData("");\r
135 \r
136 //clear vectors\r
137 fMCAllGammas.clear();\r
138 fMCPi0s.clear();\r
139 fMCEtas.clear();\r
140 fMCGammaChic.clear();\r
141\r
142 fKFReconstructedGammas.clear();\r
143\r
144 //Clear the data in the v0Reader\r
145 fV0Reader->UpdateEventByEventData();\r
146\r
147 // Process the MC information\r
148 if(fDoMCTruth){\r
149 ProcessMCData();\r
150 }\r
151\r
152 // Process the v0 information\r
153 ProcessV0s();\r
154\r
155 //calculate background if flag is set\r
156 if(fCalculateBackground){\r
157 CalculateBackground();\r
158 }\r
159\r
160 // Process reconstructed gammas\r
161 ProcessGammasForNeutralMesonAnalysis();\r
162\r
163 PostData(1, fOutputContainer);\r
164 \r
165}\r
166\r
167void AliAnalysisTaskGammaConversion::ConnectInputData(Option_t */*option*/){\r
168 // see header file for documentation\r
169\r
170 if(fV0Reader == NULL){\r
171 // Write warning here cuts and so on are default if this ever happens\r
172 }\r
173 fV0Reader->Initialize();\r
174}\r
175\r
176void AliAnalysisTaskGammaConversion::ProcessMCData(){\r
177 // see header file for documentation\r
178 \r
179 fStack = fV0Reader->GetMCStack();\r
180\r
181 for (Int_t iTracks = 0; iTracks < fStack->GetNtrack(); iTracks++) {\r
182 TParticle* particle = (TParticle *)fStack->Particle(iTracks);\r
183\r
184 if (!particle) {\r
185 //print warning here\r
186 continue;\r
187 }\r
188 \r
189 if(particle->Pt()<fV0Reader->GetPtCut()){\r
190 continue;\r
191 }\r
192 \r
193 if(TMath::Abs(particle->Eta())> fV0Reader->GetEtaCut()){\r
194 continue;\r
195 }\r
196\r
197 if(particle->R()>fV0Reader->GetMaxRCut()){ // cuts on distance from collision point\r
198 continue;\r
199 }\r
200\r
201 Double_t tmpPhi=particle->Phi();\r
202 if(particle->Phi()> TMath::Pi()){\r
203 tmpPhi = particle->Phi()-(2*TMath::Pi());\r
204 }\r
205\r
206 \r
207 //process the gammas\r
208 if (particle->GetPdgCode()== 22){\r
209 fMCAllGammas.push_back(particle);\r
210 if(particle->GetMother(0)>-1){ //Means we have a mother\r
211 if( fStack->Particle(particle->GetMother(0))->GetPdgCode() != 22 ){//Checks for a non gamma mother.\r
212 fHistograms->FillHistogram("MC_Gamma_Energy", particle->Energy());\r
213 fHistograms->FillHistogram("MC_Gamma_Pt", particle->Pt());\r
214 fHistograms->FillHistogram("MC_Gamma_Eta", particle->Eta());\r
215 \r
216 fHistograms->FillHistogram("MC_Gamma_Phi", tmpPhi);\r
217\r
218 //adding the conversion points from all gammas with e+e- daughters\r
219 if(particle->GetNDaughters() == 2){\r
220 TParticle* daughter0 = (TParticle*)fStack->Particle(particle->GetFirstDaughter());\r
221 TParticle* daughter1 = (TParticle*)fStack->Particle(particle->GetLastDaughter());\r
222 \r
223 if(daughter0->R()>fV0Reader->GetMaxRCut() || daughter1->R()>fV0Reader->GetMaxRCut()){\r
224 continue;\r
225 }\r
226 \r
227 if((daughter0->GetPdgCode() == -11 && daughter1->GetPdgCode()) == 11 ||\r
228 (daughter0->GetPdgCode() == 11 && daughter1->GetPdgCode() == -11)){\r
229\r
230 // begin Mapping \r
231 Int_t rBin = fHistograms->GetRBin(daughter0->R());\r
232 Int_t phiBin = fHistograms->GetPhiBin(daughter0->Phi());\r
233 \r
234 TString nameMCMappingPhiR="";\r
235 nameMCMappingPhiR.Form("MC_EP_Mapping-Phi%02d-R%02d",phiBin,rBin);\r
236 fHistograms->FillHistogram(nameMCMappingPhiR, daughter0->Vz(), particle->Eta());\r
237 \r
238 TString nameMCMappingPhi="";\r
239 nameMCMappingPhi.Form("MC_EP_Mapping-Phi%02d",phiBin);\r
240 fHistograms->FillHistogram(nameMCMappingPhi, particle->Eta());\r
241 \r
242 TString nameMCMappingR="";\r
243 nameMCMappingR.Form("MC_EP_Mapping-R%02d",rBin);\r
244 fHistograms->FillHistogram(nameMCMappingR, particle->Eta());\r
245 \r
246 TString nameMCMappingPhiInR="";\r
247 nameMCMappingPhiInR.Form("MC_EP_Mapping_Phi_vs_R_R-%02d",rBin);\r
248 fHistograms->FillHistogram(nameMCMappingPhiInR, daughter0->R(), tmpPhi);\r
249 //end mapping\r
250\r
251 fHistograms->FillHistogram("MC_EP_R",daughter0->R());\r
252 fHistograms->FillHistogram("MC_EP_ZR",daughter0->Vz(),daughter0->R());\r
253 fHistograms->FillHistogram("MC_EP_XY",daughter0->Vx(),daughter0->Vy());\r
254 fHistograms->FillHistogram("MC_EP_OpeningAngle",GetMCOpeningAngle(daughter0, daughter1));\r
255 }\r
256 }\r
257 }\r
258 if( fStack->Particle(particle->GetMother(0))->GetPdgCode()==10441 ||//chic0 \r
259 fStack->Particle(particle->GetMother(0))->GetPdgCode()==20443 ||//psi2S\r
260 fStack->Particle(particle->GetMother(0))->GetPdgCode()==445 //chic2\r
261 ){ \r
262 fMCGammaChic.push_back(particle);\r
263 }\r
264 }\r
265 else{//means we have a primary particle\r
266 fHistograms->FillHistogram("MC_DirectGamma_Energy",particle->Energy());\r
267 fHistograms->FillHistogram("MC_DirectGamma_Pt", particle->Pt());\r
268 fHistograms->FillHistogram("MC_DirectGamma_Eta", particle->Eta());\r
269 fHistograms->FillHistogram("MCDirectGammaPhi", tmpPhi);\r
270\r
271 //adding the conversion points from all gammas with e+e- daughters\r
272 if(particle->GetNDaughters() == 2){\r
273 TParticle* daughter0 = (TParticle*)fStack->Particle(particle->GetFirstDaughter());\r
274 TParticle* daughter1 = (TParticle*)fStack->Particle(particle->GetLastDaughter());\r
275 if((daughter0->GetPdgCode() == -11 && daughter1->GetPdgCode() == 11) ||\r
276 (daughter0->GetPdgCode() == 11 && daughter1->GetPdgCode() == -11)){\r
277 \r
278 fHistograms->FillHistogram("MC_EP_R",daughter0->R());\r
279 fHistograms->FillHistogram("MC_EP_ZR",daughter0->Vz(),daughter0->R());\r
280 fHistograms->FillHistogram("MC_EP_XY",daughter0->Vx(),daughter0->Vy());\r
281 fHistograms->FillHistogram("MC_EP_OpeningAngle",GetMCOpeningAngle(daughter0, daughter1));\r
282\r
283 }\r
284 }\r
285\r
286 }\r
287 }\r
288 else if (TMath::Abs(particle->GetPdgCode())== 11){ // Means we have an electron or a positron\r
289 if(particle->GetMother(0)>-1){ // means we have a mother\r
290 if( fStack->Particle(particle->GetMother(0))->GetPdgCode()==22 ){ // Means we have a gamma mother\r
291 if(particle->GetPdgCode() == 11){//electron \r
292 fHistograms->FillHistogram("MC_E_Energy", particle->Energy());\r
293 fHistograms->FillHistogram("MC_E_Pt", particle->Pt());\r
294 fHistograms->FillHistogram("MC_E_Eta", particle->Eta());\r
295 fHistograms->FillHistogram("MC_E_Phi", tmpPhi);\r
296 }\r
297 if(particle->GetPdgCode() == -11){//positron \r
298 fHistograms->FillHistogram("MC_P_Energy", particle->Energy());\r
299 fHistograms->FillHistogram("MC_P_Pt", particle->Pt());\r
300 fHistograms->FillHistogram("MC_P_Eta", particle->Eta());\r
301 fHistograms->FillHistogram("MC_P_Phi", tmpPhi);\r
302 }\r
303 }\r
304 }\r
305 }\r
306 else if(particle->GetNDaughters() == 2){\r
307\r
308 TParticle* daughter0 = (TParticle*)fStack->Particle(particle->GetFirstDaughter());\r
309 TParticle* daughter1 = (TParticle*)fStack->Particle(particle->GetLastDaughter());\r
310 if(daughter0->GetPdgCode() == 22 && daughter1->GetPdgCode() == 22){//check for gamma gamma daughters\r
311 \r
312 if(particle->GetPdgCode()==111){//Pi0\r
313 \r
314 fHistograms->FillHistogram("MC_Pi0_Secondaries_Phi", tmpPhi);\r
315\r
316 if( iTracks >= fStack->GetNprimary()){\r
317 \r
318 fHistograms->FillHistogram("MC_Pi0_Secondaries_Eta", particle->Eta());\r
319\r
320 fHistograms->FillHistogram("MC_Pi0_Secondaries_Phi", tmpPhi);\r
321 fHistograms->FillHistogram("MC_Pi0_Secondaries_Pt", particle->Pt());\r
322 fHistograms->FillHistogram("MC_Pi0_Secondaries_Energy", particle->Energy());\r
323 fHistograms->FillHistogram("MC_Pi0_Secondaries_R", particle->R());\r
324 fHistograms->FillHistogram("MC_Pi0_Secondaries_ZR", particle->Vz(),particle->R());\r
325 fHistograms->FillHistogram("MC_Pi0_Secondaries_OpeningAngle_Gamma", GetMCOpeningAngle(daughter0,daughter1));\r
326 fHistograms->FillHistogram("MC_Pi0_Secondaries_XY", particle->Vx(),particle->Vy());//only fill from one daughter to avoid multiple filling\r
327 }\r
328 else{\r
329 fHistograms->FillHistogram("MC_Pi0_Eta", particle->Eta());\r
330\r
331 fHistograms->FillHistogram("MC_Pi0_Phi", tmpPhi);\r
332 fHistograms->FillHistogram("MC_Pi0_Pt", particle->Pt());\r
333 fHistograms->FillHistogram("MC_Pi0_Energy", particle->Energy());\r
334 fHistograms->FillHistogram("MC_Pi0_R", particle->R());\r
335 fHistograms->FillHistogram("MC_Pi0_ZR", particle->Vz(),particle->R());\r
336 fHistograms->FillHistogram("MC_Pi0_OpeningAngle_Gamma", GetMCOpeningAngle(daughter0,daughter1));\r
337 fHistograms->FillHistogram("MC_Pi0_XY", particle->Vx(), particle->Vy());//only fill from one daughter to avoid multiple filling\r
338 }\r
339 }\r
340 else if(particle->GetPdgCode()==221){//Eta\r
341 fHistograms->FillHistogram("MC_Eta_Eta", particle->Eta());\r
342\r
343 fHistograms->FillHistogram("MC_Eta_Phi",tmpPhi);\r
344 fHistograms->FillHistogram("MC_Eta_Pt", particle->Pt());\r
345 fHistograms->FillHistogram("MC_Eta_Energy", particle->Energy());\r
346 fHistograms->FillHistogram("MC_Eta_R", particle->R());\r
347 fHistograms->FillHistogram("MC_Eta_ZR", particle->Vz(),particle->R());\r
348 fHistograms->FillHistogram("MC_Eta_OpeningAngle_Gamma", GetMCOpeningAngle(daughter0,daughter1));\r
349 fHistograms->FillHistogram("MC_Eta_XY", particle->Vx(), particle->Vy());//only fill from one daughter to avoid multiple filling\r
350 }\r
351 \r
352 //the match data should be filled no matter which mother the gamma-gamma comes from\r
353 fHistograms->FillHistogram("MC_Match_Gamma_R", particle->R());\r
354 fHistograms->FillHistogram("MC_Match_Gamma_ZR", particle->Vz(),particle->R());\r
355 fHistograms->FillHistogram("MC_Match_Gamma_XY", particle->Vx(),particle->Vy());\r
356 fHistograms->FillHistogram("MC_Match_Gamma_Mass", particle->GetCalcMass());\r
357 fHistograms->FillHistogram("MC_Match_Gamma_OpeningAngle", GetMCOpeningAngle(daughter0,daughter1));\r
358 fHistograms->FillHistogram("MC_Match_Gamma_Energy", particle->Energy());\r
359 fHistograms->FillHistogram("MC_Match_Gamma_Pt", particle->Pt());\r
360 fHistograms->FillHistogram("MC_Match_Gamma_Eta", particle->Eta());\r
361 fHistograms->FillHistogram("MC_Match_Gamma_Phi",tmpPhi);\r
362 }\r
363 }\r
364 }\r
365}\r
366\r
367void AliAnalysisTaskGammaConversion::ProcessV0s(){\r
368 // see header file for documentation\r
369\r
370 Int_t nSurvivingV0s=0;\r
371 while(fV0Reader->NextV0()){\r
372 nSurvivingV0s++;\r
373 //-------------------------- filling v0 information -------------------------------------\r
374 fHistograms->FillHistogram("ESD_EP_OpeningAngle", fV0Reader->GetOpeningAngle()); \r
375 fHistograms->FillHistogram("ESD_EP_R", fV0Reader->GetXYRadius());\r
376 fHistograms->FillHistogram("ESD_EP_ZR", fV0Reader->GetZ(),fV0Reader->GetXYRadius());\r
377 fHistograms->FillHistogram("ESD_EP_XY", fV0Reader->GetX(),fV0Reader->GetY());\r
378 \r
379 \r
380 fHistograms->FillHistogram("ESD_E_Energy", fV0Reader->GetNegativeTrackEnergy());\r
381 fHistograms->FillHistogram("ESD_E_Pt", fV0Reader->GetNegativeTrackPt());\r
382 fHistograms->FillHistogram("ESD_E_Eta", fV0Reader->GetNegativeTrackEta());\r
383 fHistograms->FillHistogram("ESD_E_Phi", fV0Reader->GetNegativeTrackPhi());\r
384 \r
385 fHistograms->FillHistogram("ESD_P_Energy", fV0Reader->GetPositiveTrackEnergy());\r
386 fHistograms->FillHistogram("ESD_P_Pt", fV0Reader->GetPositiveTrackPt());\r
387 fHistograms->FillHistogram("ESD_P_Eta", fV0Reader->GetPositiveTrackEta());\r
388 fHistograms->FillHistogram("ESD_P_Phi", fV0Reader->GetPositiveTrackPhi());\r
389 \r
390 fHistograms->FillHistogram("ESD_Gamma_Energy", fV0Reader->GetMotherCandidateEnergy());\r
391 fHistograms->FillHistogram("ESD_Gamma_Pt", fV0Reader->GetMotherCandidatePt());\r
392 fHistograms->FillHistogram("ESD_Gamma_Eta", fV0Reader->GetMotherCandidateEta());\r
393 fHistograms->FillHistogram("ESD_Gamma_Phi", fV0Reader->GetMotherCandidatePhi());\r
394\r
395\r
396 // begin mapping\r
397 Int_t rBin = fHistograms->GetRBin(fV0Reader->GetXYRadius());\r
398 Int_t phiBin = fHistograms->GetPhiBin(fV0Reader->GetNegativeTrackPhi());\r
399 Double_t motherCandidateEta= fV0Reader->GetMotherCandidateEta();\r
400 \r
401 TString nameESDMappingPhiR="";\r
402 nameESDMappingPhiR.Form("ESD_EP_Mapping-Phi%02d-R%02d",phiBin,rBin);\r
403 fHistograms->FillHistogram(nameESDMappingPhiR, fV0Reader->GetZ(), motherCandidateEta);\r
404\r
405 TString nameESDMappingPhi="";\r
406 nameESDMappingPhi.Form("ESD_EP_Mapping-Phi%02d",phiBin);\r
407 fHistograms->FillHistogram(nameESDMappingPhi, fV0Reader->GetZ(), motherCandidateEta);\r
408\r
409 TString nameESDMappingR="";\r
410 nameESDMappingR.Form("ESD_EP_Mapping-R%02d",rBin);\r
411 fHistograms->FillHistogram(nameESDMappingR, fV0Reader->GetZ(), motherCandidateEta); \r
412\r
413 TString nameESDMappingPhiInR="";\r
414 nameESDMappingPhiInR.Form("ESD_EP_Mapping_Phi_vs_R_R-%02d",rBin);\r
415 fHistograms->FillHistogram(nameESDMappingPhiInR, fV0Reader->GetXYRadius(), fV0Reader->GetMotherCandidatePhi());\r
416 // end mapping\r
417 \r
418 fKFReconstructedGammas.push_back(*fV0Reader->GetMotherCandidateKFCombination());\r
419\r
420 //----------------------------------- checking for "real" conversions (MC match) --------------------------------------\r
421 if(fDoMCTruth){\r
422 if(fV0Reader->HasSameMCMother() == kFALSE){\r
423 continue;\r
424 }\r
425\r
426 TParticle * negativeMC = (TParticle*)fV0Reader->GetNegativeMCParticle();\r
427 TParticle * positiveMC = (TParticle*)fV0Reader->GetPositiveMCParticle();\r
428 if(negativeMC->GetPdgCode()!=11 || positiveMC->GetPdgCode()!=-11){\r
429 continue;\r
430 }\r
431\r
432 if(fV0Reader->GetMotherMCParticle()->GetPdgCode() == 22){\r
433 fHistograms->FillHistogram("ESD_Match_Gamma_XY", fV0Reader->GetX(),fV0Reader->GetY());\r
434 fHistograms->FillHistogram("ESD_Match_Gamma_OpeningAngle", fV0Reader->GetOpeningAngle());\r
435 fHistograms->FillHistogram("ESD_Match_Gamma_Pt", fV0Reader->GetMotherCandidatePt());\r
436 fHistograms->FillHistogram("ESD_Match_Gamma_Energy", fV0Reader->GetMotherCandidateEnergy());\r
437 fHistograms->FillHistogram("ESD_Match_Gamma_Eta", fV0Reader->GetMotherCandidateEta());\r
438\r
439 fHistograms->FillHistogram("ESD_Match_Gamma_Phi", fV0Reader->GetMotherCandidatePhi());\r
440 fHistograms->FillHistogram("ESD_Match_Gamma_Mass", fV0Reader->GetMotherCandidateMass());\r
441 fHistograms->FillHistogram("ESD_Match_Gamma_Width", fV0Reader->GetMotherCandidateWidth());\r
442 fHistograms->FillHistogram("ESD_Match_Gamma_Chi2", fV0Reader->GetMotherCandidateChi2());\r
443 fHistograms->FillHistogram("ESD_Match_Gamma_NDF", fV0Reader->GetMotherCandidateNDF());\r
444 fHistograms->FillHistogram("ESD_Match_Gamma_R", fV0Reader->GetXYRadius());\r
445 fHistograms->FillHistogram("ESD_Match_Gamma_ZR", fV0Reader->GetZ(),fV0Reader->GetXYRadius());\r
446\r
447 //resolution\r
448 Double_t mcpt = fV0Reader->GetMotherMCParticle()->Pt();\r
449 Double_t esdpt = fV0Reader->GetMotherCandidatePt();\r
450 Double_t resdPt = 0;\r
451 if(mcpt != 0){\r
452 resdPt = ((esdpt - mcpt)/mcpt)*100;\r
453 }\r
454\r
455 fHistograms->FillHistogram("Resolution_dPt", mcpt, resdPt);\r
456 fHistograms->FillHistogram("Resolution_MC_Pt", mcpt);\r
457 fHistograms->FillHistogram("Resolution_ESD_Pt", esdpt);\r
458 \r
459 Double_t resdZ = 0;\r
460 if(fV0Reader->GetNegativeMCParticle()->Vz() != 0){\r
461 resdZ = ((fV0Reader->GetZ() -fV0Reader->GetNegativeMCParticle()->Vz())/fV0Reader->GetNegativeMCParticle()->Vz())*100;\r
462 }\r
463 \r
464 fHistograms->FillHistogram("Resolution_dZ", fV0Reader->GetNegativeMCParticle()->Vz(), resdZ);\r
465 fHistograms->FillHistogram("Resolution_MC_Z", fV0Reader->GetNegativeMCParticle()->Vz());\r
466 fHistograms->FillHistogram("Resolution_ESD_Z", fV0Reader->GetZ());\r
467 \r
468 Double_t resdR = 0;\r
469 if(fV0Reader->GetNegativeMCParticle()->R() != 0){\r
470 resdR = ((fV0Reader->GetXYRadius() - fV0Reader->GetNegativeMCParticle()->R())/fV0Reader->GetNegativeMCParticle()->R())*100;\r
471 }\r
472 fHistograms->FillHistogram("Resolutiond_R", fV0Reader->GetNegativeMCParticle()->R(), resdR);\r
473 fHistograms->FillHistogram("Resolution_MC_R", fV0Reader->GetNegativeMCParticle()->R());\r
474 fHistograms->FillHistogram("Resolution_ESD_R", fV0Reader->GetXYRadius());\r
475 fHistograms->FillHistogram("Resolution_dR_dPt", resdR, resdPt);\r
476 }\r
477 }\r
478 }\r
479 fHistograms->FillHistogram("NumberOfSurvivingV0s", nSurvivingV0s);\r
480 fHistograms->FillHistogram("NumberOfV0s", fV0Reader->GetNumberOfV0s());\r
481}\r
482\r
483void AliAnalysisTaskGammaConversion::ProcessGammasForNeutralMesonAnalysis(){\r
484 // see header file for documentation\r
485\r
486 for(UInt_t firstGammaIndex=0;firstGammaIndex<fKFReconstructedGammas.size();firstGammaIndex++){\r
487 for(UInt_t secondGammaIndex=firstGammaIndex+1;secondGammaIndex<fKFReconstructedGammas.size();secondGammaIndex++){\r
488 AliKFParticle * twoGammaDecayCandidateDaughter0 = &fKFReconstructedGammas[firstGammaIndex];\r
489 AliKFParticle * twoGammaDecayCandidateDaughter1 = &fKFReconstructedGammas[secondGammaIndex];\r
490\r
491 \r
492 AliKFParticle *twoGammaCandidate = new AliKFParticle(*twoGammaDecayCandidateDaughter0,*twoGammaDecayCandidateDaughter1);\r
493\r
494 Double_t massTwoGammaCandidate =0.;\r
495 Double_t widthTwoGammaCandidate = 0.;\r
496 Double_t chi2TwoGammaCandidate =10000.; \r
497 twoGammaCandidate->GetMass(massTwoGammaCandidate,widthTwoGammaCandidate);\r
498 if(twoGammaCandidate->GetNDF()>0){\r
499 chi2TwoGammaCandidate = twoGammaCandidate->GetChi2()/twoGammaCandidate->GetNDF();\r
500 // if(chi2TwoGammaCandidate>0 && chi2TwoGammaCandidate<fChi2Cut){//TODO find this out\r
501 if(chi2TwoGammaCandidate>0 && chi2TwoGammaCandidate<10000){//TODO find this out see line above\r
502\r
503 TVector3 vectorTwoGammaCandidate(twoGammaCandidate->Px(),twoGammaCandidate->Py(),twoGammaCandidate->Pz());\r
504\r
505 Double_t openingAngleTwoGammaCandidate = twoGammaDecayCandidateDaughter0->GetAngle(*twoGammaDecayCandidateDaughter1);\r
506\r
507 //Calculating by hand the radius\r
508 Double_t tmpX= twoGammaCandidate->GetX();\r
509 Double_t tmpY= twoGammaCandidate->GetY();\r
510 \r
511 Double_t radiusTwoGammaCandidate = TMath::Sqrt(tmpX*tmpX + tmpY*tmpY);\r
512\r
513 fHistograms->FillHistogram("ESD_TwoGammaCombination_OpeningAngleGamma", openingAngleTwoGammaCandidate);\r
514 fHistograms->FillHistogram("ESD_TwoGammaCombination_Energy", twoGammaCandidate->GetE());\r
515 fHistograms->FillHistogram("ESD_TwoGammaCombination_Pt", sqrt(twoGammaCandidate->GetPx()*twoGammaCandidate->GetPx()+twoGammaCandidate->GetPy()*twoGammaCandidate->GetPy()));\r
516 fHistograms->FillHistogram("ESD_TwoGammaCombination_Eta", vectorTwoGammaCandidate.Eta());\r
517 fHistograms->FillHistogram("ESD_TwoGammaCombination_Phi", vectorTwoGammaCandidate.Phi());\r
518 fHistograms->FillHistogram("ESD_TwoGammaCombination_Mass", massTwoGammaCandidate);\r
519 fHistograms->FillHistogram("ESD_TwoGammaCombination_R", radiusTwoGammaCandidate);\r
520 fHistograms->FillHistogram("ESD_TwoGammaCombination_ZR", tmpY, radiusTwoGammaCandidate);\r
521 fHistograms->FillHistogram("ESD_TwoGammaCombination_XY", tmpX, tmpY); \r
522 fHistograms->FillHistogram("InvMass_vs_Pt__Spectra",massTwoGammaCandidate ,sqrt(twoGammaCandidate->GetPx()*twoGammaCandidate->GetPx()+twoGammaCandidate->GetPy()*twoGammaCandidate->GetPy()));\r
523 }\r
524 }\r
525 delete twoGammaCandidate;\r
526 }\r
527 }\r
528\r
529}\r
530\r
531void AliAnalysisTaskGammaConversion::CalculateBackground(){\r
532 // see header file for documentation\r
533\r
534 vector<AliKFParticle> vectorCurrentEventGoodV0s = fV0Reader->GetCurrentEventGoodV0s();\r
535 vector<AliKFParticle> vectorPreviousEventGoodV0s = fV0Reader->GetPreviousEventGoodV0s();\r
536 for(UInt_t iCurrent=0;iCurrent<vectorCurrentEventGoodV0s.size();iCurrent++){\r
537 AliKFParticle * currentEventGoodV0 = &vectorCurrentEventGoodV0s.at(iCurrent);\r
538 for(UInt_t iPrevious=0;iPrevious<vectorPreviousEventGoodV0s.size();iPrevious++){\r
539 AliKFParticle * previousGoodV0 = &vectorPreviousEventGoodV0s.at(iPrevious);\r
540\r
541 AliKFParticle *backgroundCandidate = new AliKFParticle(*currentEventGoodV0,*previousGoodV0);\r
542\r
543 Double_t massBG =0.;\r
544 Double_t widthBG = 0.;\r
545 Double_t chi2BG =10000.; \r
546 backgroundCandidate->GetMass(massBG,widthBG);\r
547 if(backgroundCandidate->GetNDF()>0){\r
548 chi2BG = backgroundCandidate->GetChi2()/backgroundCandidate->GetNDF();\r
549 // if(chi2Pi0>0 && chi2Pi0<fChi2Cut){//TODO find this out\r
550 if(chi2BG>0 && chi2BG<fV0Reader->GetChi2Cut()){//TODO find this out see line above\r
551\r
552 TVector3 vectorBGCandidate(backgroundCandidate->Px(),backgroundCandidate->Py(),backgroundCandidate->Pz());\r
553\r
554 Double_t openingAngleBG = currentEventGoodV0->GetAngle(*previousGoodV0);\r
555\r
556 //Calculating by hand the radius (find a better way)\r
557 Double_t tmpX= backgroundCandidate->GetX();\r
558 Double_t tmpY= backgroundCandidate->GetY();\r
559 \r
560 Double_t radiusBG = TMath::Sqrt(tmpX*tmpX + tmpY*tmpY);\r
561\r
562 fHistograms->FillHistogram("ESD_Background_GammaDaughter_OpeningAngle", openingAngleBG);\r
563 fHistograms->FillHistogram("ESD_Background_Energy", backgroundCandidate->GetE());\r
564 fHistograms->FillHistogram("ESD_Background_Pt", sqrt(backgroundCandidate->GetPx()*backgroundCandidate->GetPx()+backgroundCandidate->GetPy()*backgroundCandidate->GetPy()));\r
565 fHistograms->FillHistogram("ESD_Background_Eta", vectorBGCandidate.Eta());\r
566 fHistograms->FillHistogram("ESD_Background_Phi", vectorBGCandidate.Phi());\r
567 fHistograms->FillHistogram("ESD_Background_Mass", massBG);\r
568 fHistograms->FillHistogram("ESD_Background_R", radiusBG);\r
569 fHistograms->FillHistogram("ESD_Background_ZR", tmpY, radiusBG);\r
570 fHistograms->FillHistogram("ESD_Background_XY", tmpX, tmpY);\r
571 }\r
572 }\r
573 delete backgroundCandidate; \r
574 }\r
575 }\r
576}\r
577\r
578void AliAnalysisTaskGammaConversion::Terminate(Option_t */*option*/)\r
579{\r
580 // Terminate analysis\r
581 //\r
582 AliDebug(1,"Do nothing in Terminate");\r
583}\r
584\r
585void AliAnalysisTaskGammaConversion::UserCreateOutputObjects()\r
586{\r
587 // Create the output container\r
588 if(fOutputContainer != NULL){\r
589 delete fOutputContainer;\r
590 fOutputContainer = NULL;\r
591 }\r
592 if(fOutputContainer == NULL){\r
593 fOutputContainer = new TList();\r
594 }\r
595 fHistograms->GetOutputContainer(fOutputContainer);\r
596 fOutputContainer->SetName(GetName()) ; \r
597}\r
598\r
599Double_t AliAnalysisTaskGammaConversion::GetMCOpeningAngle(TParticle* daughter0, TParticle* daughter1) const{\r
600 //helper function\r
601 TVector3 v3D0(daughter0->Px(),daughter0->Py(),daughter0->Pz());\r
602 TVector3 v3D1(daughter1->Px(),daughter1->Py(),daughter1->Pz());\r
603 return v3D0.Angle(v3D1);\r
604}\r
605\r