Cleaning up files, added documentation. Added ntuple for v0s.
[u/mrichter/AliRoot.git] / PWG4 / GammaConv / AliV0Reader.h
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3c538586 1#ifndef ALIV0READER_H\r
2#define ALIV0READER_H\r
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *\r
4 * See cxx source for full Copyright notice */\r
5\r
6////////////////////////////////////////////////\r
7//--------------------------------------------- \r
8// Class used to do analysis on conversion pairs\r
9//---------------------------------------------\r
10////////////////////////////////////////////////\r
11\r
12// --- ROOT system ---\r
13#include "TObject.h" \r
14#include "AliESDv0.h"\r
15#include "AliESDEvent.h"\r
16#include "AliKFParticle.h"\r
17#include "TParticle.h"\r
18#include "AliGammaConversionHistograms.h"\r
19#include <vector>\r
20\r
21class TClonesArray; \r
22class TFormula;\r
23class Riostream;\r
24class TChain;\r
25//--- AliRoot system ---\r
26\r
27class AliStack;\r
28class AliESDEvent; \r
29class AliMCEventHandler;\r
30class AliESDInputHandler;\r
31class AliESDVertex;\r
32class AliLog;\r
33class TChain;\r
34class TChain;\r
35\r
36\r
37\r
38class AliV0Reader : public TObject {\r
39\r
40 public: \r
41\r
42 AliV0Reader(); //constructor\r
43 AliV0Reader(const AliV0Reader & g); //copy constructor\r
44 AliV0Reader & operator = (const AliV0Reader & g); //assignment operator\r
45 virtual ~AliV0Reader() {;} //virtual destructor\r
46 /*\r
47 *Initialize the reader\r
48 */\r
49 void Initialize();\r
50\r
51 /*\r
52 *Returns the number of v0s in the event, no cuts applied.\r
53 */\r
54 Int_t GetNumberOfV0s() const{return fESDEvent->GetNumberOfV0s();}\r
55\r
56 /*\r
57 * Check if there are any more good v0s left in the v0 stack\r
58 * if so, fCurrent v0 is set to this v0 and can be retrieved\r
59 * by GetCurrentV0 function.\r
60 * returns kFALSE if there is no more good v0s in the v0 stack\r
61 */\r
62 Bool_t NextV0();\r
63 \r
64 /*\r
65 * Returns the v0 at the given index, no checks are done on the v0. \r
66 */\r
67 AliESDv0* GetV0(Int_t index);\r
68\r
69 /*\r
70 * Returns the current v0\r
71 */\r
72 AliESDv0* GetCurrentV0() const{return fCurrentV0;}\r
73\r
74 /*\r
75 * Returns the negative ESD track which belongs to fCurrentV0\r
76 */\r
77 AliESDtrack* GetNegativeESDTrack(){return fESDEvent->GetTrack(fCurrentV0->GetNindex());}\r
78\r
79 /*\r
80 * Returns the positive ESD track which belongs to fCurrentV0\r
81 */\r
82 AliESDtrack* GetPositiveESDTrack(){return fESDEvent->GetTrack(fCurrentV0->GetPindex());}\r
83\r
84 /*\r
85 * Returns the negative KF particle which belongs to fCurrentV0\r
86 */\r
87 AliKFParticle* GetNegativeKFParticle() const{return fCurrentNegativeKFParticle;}\r
88\r
89 /*\r
90 * Returns the positive KF particle which belongs to fCurrentV0\r
91 */\r
92 AliKFParticle* GetPositiveKFParticle() const{return fCurrentPositiveKFParticle;}\r
a19c3402 93\r
3c538586 94 /*\r
95 * Returns the KFParticle object of the 2 tracks.\r
96 */\r
97 AliKFParticle* GetMotherCandidateKFCombination() const{return fCurrentMotherKFCandidate;}\r
a19c3402 98\r
3c538586 99 /*\r
100 * Checks the probablity that the PID of the particle is what we want it to be.\r
101 */\r
102 Bool_t CheckPIDProbability(Double_t negProbCut, Double_t posProbCut);\r
a19c3402 103 \r
104 /*\r
105 * Checks if the PID of the two particles are within our cuts.\r
106 */\r
107 void GetPIDProbability(Double_t &negPIDProb, Double_t &posPIDProb);\r
3c538586 108\r
109 /*\r
110 *Get the negative MC TParticle from the stack \r
111 */\r
112 TParticle * GetNegativeMCParticle() const{return fNegativeMCParticle;}\r
113\r
114 /*\r
115 *Get the positive MC TParticle from the stack \r
116 */\r
117 TParticle * GetPositiveMCParticle() const{return fPositiveMCParticle;}\r
118\r
119 /*\r
120 *Get the mother MC TParticle from the stack \r
121 */\r
122 TParticle * GetMotherMCParticle() const{return fMotherMCParticle;}\r
123\r
a19c3402 124 /*\r
125 * Flag to see if the v0 particles share the same mother\r
126 */\r
3c538586 127 Bool_t HasSameMCMother();\r
128\r
a19c3402 129\r
130 /*\r
131 *Get the PID of the MC mother particle\r
132 */\r
133 Int_t GetMotherMCParticlePDGCode() const{if(fMotherMCParticle != NULL){ cout<<"MCParticle exists"<<endl;} return fMotherMCParticle->GetPdgCode();}\r
134\r
3c538586 135 /*\r
136 *Get the MC stack \r
137 */\r
138 AliStack* GetMCStack() const{return fMCStack;}\r
139\r
140 /*\r
141 *Get the magnetic field from the ESD event \r
142 */\r
143 Double_t GetMagneticField() const{return fESDEvent->GetMagneticField();}\r
144\r
145 /*\r
146 *Get the primary vertex from the esd event\r
147 */\r
148 const AliESDVertex *GetPrimaryVertex() const {return fESDEvent->GetPrimaryVertex();}\r
149\r
150 /*\r
151 * Set the PID of the negative track\r
152 */\r
153 void SetNegativeTrackPID(Int_t negTrackPID){fNegativeTrackPID=negTrackPID;}\r
154\r
155 /*\r
156 * Set the PID of the positive track\r
157 */\r
158 void SetPositiveTrackPID(Int_t posTrackPID){fPositiveTrackPID=posTrackPID;}\r
159\r
160 /*\r
161 * Set the flag to use the kfparticle class. Will also disable the use of esd tracks\r
162 */\r
163 void UseKFParticle(){fUseKFParticle = kTRUE; fUseESDTrack = kFALSE;}\r
164\r
165 /*\r
166 * Set the flag to use the esd track class. Will also disable the use of kf particles\r
167 */\r
168 void UseESDTrack(){fUseESDTrack = kTRUE; fUseKFParticle = kFALSE;}\r
169\r
170 /*\r
171 * Set the flag to use improved vertex or not\r
172 */\r
173 void SetUseImprovedVertex(Bool_t useImprovedVertex){fUseImprovedVertex=useImprovedVertex;}\r
174\r
175 /*\r
176 * Return the number in the species array belonging to the negative or positive track pid.\r
177 */\r
178 Int_t GetSpeciesIndex(Int_t chargeOfTrack);\r
179\r
180 /*\r
181 * Return the x coordinate of the v0\r
182 */\r
183 Double_t GetX() const{return fCurrentXValue;}\r
184\r
185 /*\r
186 * Return the y coordinate of the v0\r
187 */\r
188 Double_t GetY() const{return fCurrentYValue;}\r
189\r
190 /*\r
191 * Return the Z coordinate of the v0\r
192 */\r
193 Double_t GetZ() const{return fCurrentZValue;}\r
194\r
195 /*\r
196 * Return the radius of the v0\r
197 */\r
198 Double_t GetXYRadius() const{return sqrt((Double_t)(fCurrentXValue*fCurrentXValue + fCurrentYValue*fCurrentYValue));}\r
199\r
200 /*\r
201 * Get the opening angle between the two tracks\r
202 */\r
203 Double_t GetOpeningAngle(){return fNegativeTrackLorentzVector->Angle(fPositiveTrackLorentzVector->Vect());}\r
204\r
a19c3402 205 /*\r
206 * Gets the Energy of the negative track.\r
207 */\r
3c538586 208 Double_t GetNegativeTrackEnergy() const{return fCurrentNegativeKFParticle->E();}\r
a19c3402 209\r
210 /*\r
211 * Gets the Energy of the positive track.\r
212 */\r
3c538586 213 Double_t GetPositiveTrackEnergy() const{return fCurrentPositiveKFParticle->E();}\r
a19c3402 214\r
215 /*\r
216 * Gets the Energy of the mother candidate.\r
217 */\r
3c538586 218 Double_t GetMotherCandidateEnergy() const{return fCurrentMotherKFCandidate->E();}\r
219\r
a19c3402 220 /*\r
221 * Gets the Pt of the negative track.\r
222 */\r
3c538586 223 Double_t GetNegativeTrackPt() const{return fNegativeTrackLorentzVector->Pt();}\r
a19c3402 224\r
225 /*\r
226 * Gets the Pt of the positive track.\r
227 */\r
3c538586 228 Double_t GetPositiveTrackPt() const{return fPositiveTrackLorentzVector->Pt();}\r
a19c3402 229\r
230 /*\r
231 * Gets the Pt of the mother candidate.\r
232 */\r
3c538586 233 Double_t GetMotherCandidatePt() const{return fMotherCandidateLorentzVector->Pt();}\r
234\r
a19c3402 235 /*\r
236 * Gets the Eta of the negative track.\r
237 */\r
3c538586 238 Double_t GetNegativeTrackEta() const{return fNegativeTrackLorentzVector->Eta();}\r
a19c3402 239 /*\r
240 * Gets the Eta of the positive track.\r
241 */\r
3c538586 242 Double_t GetPositiveTrackEta() const{return fPositiveTrackLorentzVector->Eta();}\r
a19c3402 243 /*\r
244 * Gets the Eta of the mother candidate.\r
245 */\r
3c538586 246 Double_t GetMotherCandidateEta() const{return fMotherCandidateLorentzVector->Eta();}\r
247\r
a19c3402 248 /*\r
249 * Gets the NDF of the mother candidate.\r
250 */\r
3c538586 251 Double_t GetMotherCandidateNDF() const{return fCurrentMotherKFCandidate->GetNDF();}\r
a19c3402 252\r
253 /*\r
254 * Gets the Chi2 of the mother candidate.\r
255 */\r
3c538586 256 Double_t GetMotherCandidateChi2() const{return fCurrentMotherKFCandidate->GetChi2();}\r
a19c3402 257\r
258 /*\r
259 * Gets the Mass of the mother candidate.\r
260 */\r
3c538586 261 Double_t GetMotherCandidateMass() const{return fMotherCandidateKFMass;}\r
a19c3402 262\r
263 /*\r
264 * Gets the Width of the mother candidate.\r
265 */\r
3c538586 266 Double_t GetMotherCandidateWidth() const{return fMotherCandidateKFWidth;}\r
267\r
a19c3402 268 /*\r
269 * Gets the Phi of the negative track.\r
270 */\r
3c538586 271 Double_t GetNegativeTrackPhi() const;\r
a19c3402 272\r
273 /*\r
274 * Gets the Phi of the positive track.\r
275 */\r
3c538586 276 Double_t GetPositiveTrackPhi() const;\r
a19c3402 277\r
278 /*\r
279 * Gets the Phi of the mother candidate.\r
280 */\r
3c538586 281 Double_t GetMotherCandidatePhi() const;\r
282\r
a19c3402 283 /*\r
284 * Update data which need to be updated every event.\r
285 */\r
3c538586 286 void UpdateEventByEventData();\r
287 \r
a19c3402 288 /*\r
289 * Gets the MaxRCut value.\r
290 */\r
3c538586 291 Double_t GetMaxRCut() const{return fMaxR;}\r
a19c3402 292\r
293 /*\r
294 * Gets the Eta cut value.\r
295 */\r
3c538586 296 Double_t GetEtaCut() const{return fEtaCut;}\r
a19c3402 297\r
298 /*\r
299 * Gets the Pt cut value.\r
300 */\r
3c538586 301 Double_t GetPtCut() const{return fPtCut;}\r
a19c3402 302\r
303 /*\r
304 * Gets the Chi2 cut value for the conversions.\r
305 */\r
3c538586 306 Double_t GetChi2CutConversion() const{return fChi2CutConversion;}\r
a19c3402 307\r
308 /*\r
309 * Gets the Chi2 cut value for the mesons.\r
310 */\r
3c538586 311 Double_t GetChi2CutMeson() const{return fChi2CutMeson;}\r
312\r
a19c3402 313 /*\r
314 * Sets the MaxRCut value.\r
315 */\r
3c538586 316 void SetMaxRCut(Double_t maxR){fMaxR=maxR;}\r
a19c3402 317\r
318 /*\r
319 * Sets the EtaCut value.\r
320 */\r
3c538586 321 void SetEtaCut(Double_t etaCut){fEtaCut=etaCut;}\r
a19c3402 322\r
323 /*\r
324 * Sets the PtCut value.\r
325 */\r
3c538586 326 void SetPtCut(Double_t ptCut){fPtCut=ptCut;}\r
a19c3402 327\r
328 /*\r
329 * Sets the Chi2Cut value for conversions.\r
330 */\r
3c538586 331 void SetChi2CutConversion(Double_t chi2){fChi2CutConversion=chi2;}\r
a19c3402 332\r
333 /*\r
334 * Sets the Chi2Cut for the mesons.\r
335 */\r
3c538586 336 void SetChi2CutMeson(Double_t chi2){fChi2CutMeson=chi2;}\r
337 \r
a19c3402 338 /*\r
339 * Sets the XVertexCut value.\r
340 */\r
3c538586 341 void SetXVertexCut(Double_t xVtx){fCurrentXValue=xVtx;}\r
a19c3402 342\r
343 /*\r
344 * Sets the YVertexCut value.\r
345 */\r
3c538586 346 void SetYVertexCut(Double_t yVtx){fCurrentYValue=yVtx;}\r
a19c3402 347\r
348 /*\r
349 * Sets the ZVertexCut value.\r
350 */\r
3c538586 351 void SetZVertexCut(Double_t zVtx){fCurrentZValue=zVtx;}\r
a19c3402 352\r
353 /*\r
354 * Sets the PIDProbabilityCut value for track particles.\r
355 */\r
3c538586 356 void SetPIDProbability(Double_t pidProb){fPIDProbabilityCutPositiveParticle=pidProb; fPIDProbabilityCutNegativeParticle=pidProb;}\r
a19c3402 357\r
358 /*\r
359 * Sets the PIDProbability cut value for the negative track.\r
360 */\r
3c538586 361 void SetPIDProbabilityNegativeParticle(Double_t pidProb){fPIDProbabilityCutNegativeParticle=pidProb;}\r
a19c3402 362\r
363 /*\r
364 * Sets the PIDProbability cut value for the positive track.\r
365 */\r
3c538586 366 void SetPIDProbabilityPositiveParticle(Double_t pidProb){fPIDProbabilityCutPositiveParticle=pidProb;}\r
a19c3402 367\r
368 /*\r
369 * Sets the SigmaMassCut value.\r
370 */\r
3c538586 371 void SetSigmaMass(Double_t sigmaMass){fNSigmaMass=sigmaMass;}\r
372\r
a19c3402 373 /*\r
374 * Sets the flag to enable/disable the usage of MC information. \r
375 */\r
3c538586 376 void SetDoMCTruth(Bool_t doMC){fDoMC = doMC;}\r
377\r
a19c3402 378 /*\r
379 * Updates the V0 information of the current V0.\r
380 */\r
3c538586 381 void UpdateV0Information();\r
382\r
a19c3402 383 /*\r
384 * Resets the V0 index.\r
385 */\r
386 void ResetV0IndexNumber(){fCurrentV0IndexNumber=0;}\r
387\r
388 /*\r
389 * Sets the histograms.\r
390 */\r
3c538586 391 void SetHistograms(AliGammaConversionHistograms *histograms){fHistograms=histograms;}\r
392\r
a19c3402 393 /*\r
394 * Check for primary vertex.\r
395 */\r
396 Bool_t CheckForPrimaryVertex();\r
397\r
398 /*\r
399 * Gets a vector of good v0s.\r
400 */\r
3c538586 401 vector<AliKFParticle> GetCurrentEventGoodV0s() const{return fCurrentEventGoodV0s;}\r
a19c3402 402\r
403 /*\r
404 * Gets the vector of previous events v0s (for bacground analysis)\r
405 */\r
3c538586 406 vector<AliKFParticle> GetPreviousEventGoodV0s() const{return fPreviousEventGoodV0s;}\r
407\r
408 private:\r
409 AliStack * fMCStack; // pointer to MonteCarlo particle stack \r
410 AliMCEventHandler* fMCTruth; // pointer to the MC event handler\r
411 TChain * fChain; // pointer to the TChain\r
412 \r
413 AliESDInputHandler* fESDHandler; //! pointer to esd object\r
414 AliESDEvent *fESDEvent; //! pointer to esd object\r
415\r
416 AliGammaConversionHistograms *fHistograms;\r
417 \r
418 Int_t fCurrentV0IndexNumber;\r
419 AliESDv0 * fCurrentV0; //! pointer to the current v0\r
420 AliKFParticle * fCurrentNegativeKFParticle; //! pointer to the negative KF particle\r
421 AliKFParticle * fCurrentPositiveKFParticle; //! pointer to the positive KF particle\r
422 AliKFParticle * fCurrentMotherKFCandidate; //! pointer to the positive KF particle\r
423\r
424 AliESDtrack * fCurrentNegativeESDTrack; //! pointer to the negative ESD track\r
425 AliESDtrack * fCurrentPositiveESDTrack; //! pointer to the positive ESD track\r
426 \r
427 TLorentzVector * fNegativeTrackLorentzVector; //! pointer to the negative Track Lorentz Vector\r
428 TLorentzVector * fPositiveTrackLorentzVector; //! pointer to the positive Track Lorentz Vector\r
429 TLorentzVector * fMotherCandidateLorentzVector; //! pointer to the mother candidate Track Lorentz Vector\r
430\r
431 Double_t fCurrentXValue;\r
432 Double_t fCurrentYValue;\r
433 Double_t fCurrentZValue;\r
434\r
435 Int_t fPositiveTrackPID;\r
436 Int_t fNegativeTrackPID;\r
437\r
438 TParticle *fNegativeMCParticle; //!\r
439 TParticle *fPositiveMCParticle; //!\r
440 TParticle *fMotherMCParticle; //!\r
441\r
442 Double_t fMotherCandidateKFMass;\r
443 Double_t fMotherCandidateKFWidth;\r
444\r
445 Bool_t fUseKFParticle;\r
446 Bool_t fUseESDTrack;\r
447 Bool_t fDoMC;\r
448\r
449 //cuts\r
450 Double_t fMaxR;\r
451 Double_t fEtaCut;\r
452 Double_t fPtCut;\r
453 Double_t fChi2CutConversion;\r
454 Double_t fChi2CutMeson;\r
455 Double_t fPIDProbabilityCutNegativeParticle;\r
456 Double_t fPIDProbabilityCutPositiveParticle;\r
457 Double_t fXVertexCut;\r
458 Double_t fYVertexCut;\r
459 Double_t fZVertexCut;\r
460 \r
461 Double_t fNSigmaMass;\r
462 \r
463 Bool_t fUseImprovedVertex;\r
464 \r
465 vector<AliKFParticle> fCurrentEventGoodV0s;\r
466 vector<AliKFParticle> fPreviousEventGoodV0s;\r
467\r
468 ClassDef(AliV0Reader,0)\r
469};\r
470\r
471\r
472#endif\r
473\r
474\r
475\r