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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id: AliAnalysisTaskLukeV0.cxx 46301 2011-01-06 14:25:27Z agheata $ */ | |
17 | ||
18 | /* AliAnalysisTaskLukeV0.cxx | |
19 | * | |
20 | * Task analysing lambda, antilambda & K0 spectra | |
21 | * | |
22 | * Based on tutorial example from offline pages | |
23 | * Edited by Arvinder Palaha | |
24 | * Adapted by Luke Hanratty | |
25 | * ------------------------* | |
26 | * | |
27 | */ | |
28 | ||
29 | #include "AliAnalysisTaskLukeV0.h" | |
30 | ||
31 | #include "Riostream.h" | |
32 | #include "TChain.h" | |
33 | #include "TTree.h" | |
34 | #include "TH1F.h" | |
35 | #include "TH2F.h" | |
36 | #include "TCanvas.h" | |
37 | #include "TList.h" | |
38 | #include "TPDGCode.h" | |
39 | ||
40 | #include "AliAnalysisTaskSE.h" | |
41 | #include "AliAnalysisManager.h" | |
42 | #include "AliStack.h" | |
43 | #include "AliESDtrackCuts.h" | |
44 | #include "AliESDEvent.h" | |
45 | #include "AliESDv0.h" | |
46 | #include "AliESDInputHandler.h" | |
47 | #include "AliAODEvent.h" | |
48 | #include "AliMCEvent.h" | |
49 | #include "AliMCVertex.h" | |
50 | #include "AliPID.h" | |
51 | #include "AliPIDResponse.h" | |
52 | ||
53 | ClassImp(AliAnalysisTaskLukeV0) | |
54 | ||
55 | //________________________________________________________________________ | |
56 | AliAnalysisTaskLukeV0::AliAnalysisTaskLukeV0() // All data members should be initialised here | |
57 | :AliAnalysisTaskSE(), | |
58 | fOutputList(0), | |
59 | fTrackCuts(0), | |
60 | fPIDResponse(0), | |
61 | fHistCosPA(0), | |
62 | fHistDCAV0Daughters(0), | |
63 | fHistDecayL(0), | |
64 | fHistImpactxyN(0), | |
65 | fHistImpactzN(0), | |
66 | fHistImpactxyP(0), | |
67 | fHistImpactzP(0), | |
68 | fHistMCLambdacTau(0), | |
69 | fHistMCLambdaNotcTau(0), | |
70 | fHistMCLambdaDecayL(0), | |
71 | fHistMCLambdaNotDecayL(0), | |
72 | fHistMcNLambdaPrimary(0), | |
73 | fHistMcNLambda(0), | |
74 | fHistMcNAntilambda(0), | |
75 | fHistMcNKshort(0), | |
76 | fHistMK0(0), | |
77 | fHistMLa(0), | |
78 | fHistMLb(0), | |
79 | fHistNLambda(0), | |
80 | fHistNV0(0), | |
81 | fHistPtV0(0), | |
82 | fHistPVZ(0), | |
83 | fHistTauLa(0), | |
84 | fHistV0Z(0), | |
85 | fHistZ(0), | |
86 | fHistBetheBlochTPCNeg(0), | |
87 | fHistBetheBlochTPCPos(0), | |
88 | fHistImpactxyImpactz(0), | |
89 | fHistMcPMK0Pt(0), | |
90 | fHistMcPMLaPt(0), | |
91 | fHistMcPMLbPt(0), | |
92 | fHistMcV0MK0Pt(0), | |
93 | fHistMcV0MLaPt(0), | |
94 | fHistMcV0MLbPt(0), | |
95 | fHistMK0Pt(0), | |
96 | fHistMLaPt(0), | |
97 | fHistMLbPt(0), | |
98 | fHistPtArm(0), | |
99 | fHistRZ(0), | |
100 | fHistXZ(0), | |
101 | fHistYZ(0) // The last in the above list should not have a comma after it | |
102 | { | |
103 | // Dummy constructor ALWAYS needed for I/O. | |
104 | } | |
105 | ||
106 | //________________________________________________________________________ | |
107 | AliAnalysisTaskLukeV0::AliAnalysisTaskLukeV0(const char *name) // All data members should be initialised here | |
108 | :AliAnalysisTaskSE(name), | |
109 | fOutputList(0), | |
110 | fTrackCuts(0), | |
111 | fPIDResponse(0), | |
112 | fHistCosPA(0), | |
113 | fHistDCAV0Daughters(0), | |
114 | fHistDecayL(0), | |
115 | fHistImpactxyN(0), | |
116 | fHistImpactzN(0), | |
117 | fHistImpactxyP(0), | |
118 | fHistImpactzP(0), | |
119 | fHistMCLambdacTau(0), | |
120 | fHistMCLambdaNotcTau(0), | |
121 | fHistMCLambdaDecayL(0), | |
122 | fHistMCLambdaNotDecayL(0), | |
123 | fHistMcNLambdaPrimary(0), | |
124 | fHistMcNLambda(0), | |
125 | fHistMcNAntilambda(0), | |
126 | fHistMcNKshort(0), | |
127 | fHistMK0(0), | |
128 | fHistMLa(0), | |
129 | fHistMLb(0), | |
130 | fHistNLambda(0), | |
131 | fHistNV0(0), | |
132 | fHistPtV0(0), | |
133 | fHistPVZ(0), | |
134 | fHistTauLa(0), | |
135 | fHistV0Z(0), | |
136 | fHistZ(0), | |
137 | fHistBetheBlochTPCNeg(0), | |
138 | fHistBetheBlochTPCPos(0), | |
139 | fHistImpactxyImpactz(0), | |
140 | fHistMcPMK0Pt(0), | |
141 | fHistMcPMLaPt(0), | |
142 | fHistMcPMLbPt(0), | |
143 | fHistMcV0MK0Pt(0), | |
144 | fHistMcV0MLaPt(0), | |
145 | fHistMcV0MLbPt(0), | |
146 | fHistMK0Pt(0), | |
147 | fHistMLaPt(0), | |
148 | fHistMLbPt(0), | |
149 | fHistPtArm(0), | |
150 | fHistRZ(0), | |
151 | fHistXZ(0), | |
152 | fHistYZ(0) // The last in the above list should not have a comma after it | |
153 | { | |
154 | // Constructor | |
155 | // Define input and output slots here (never in the dummy constructor) | |
156 | // Input slot #0 works with a TChain - it is connected to the default input container | |
157 | // Output slot #1 writes into a TH1 container | |
158 | DefineOutput(1, TList::Class()); // for output list | |
159 | } | |
160 | ||
161 | //________________________________________________________________________ | |
162 | AliAnalysisTaskLukeV0::~AliAnalysisTaskLukeV0() | |
163 | { | |
164 | // Destructor. Clean-up the output list, but not the histograms that are put inside | |
165 | // (the list is owner and will clean-up these histograms). Protect in PROOF case. | |
166 | if (fOutputList && !AliAnalysisManager::GetAnalysisManager()->IsProofMode()) { | |
167 | delete fOutputList; | |
168 | } | |
169 | if (fTrackCuts) delete fTrackCuts; | |
170 | } | |
171 | ||
172 | //________________________________________________________________________ | |
173 | void AliAnalysisTaskLukeV0::UserCreateOutputObjects() | |
174 | { | |
175 | // Create histograms | |
176 | // Called once (on the worker node) | |
177 | ||
178 | fOutputList = new TList(); | |
179 | fOutputList->SetOwner(); // IMPORTANT! | |
180 | ||
181 | fTrackCuts = new AliESDtrackCuts(); | |
182 | ||
183 | AliAnalysisManager *man=AliAnalysisManager::GetAnalysisManager(); | |
184 | AliInputEventHandler* inputHandler = (AliInputEventHandler*) (man->GetInputEventHandler()); | |
185 | fPIDResponse = inputHandler->GetPIDResponse(); | |
186 | ||
187 | // lambda plot parameters | |
188 | int div = 96; | |
189 | float max = 1.2; | |
190 | float min = 1.08; | |
191 | ||
192 | // Create remaining histograms | |
193 | // TH1F first | |
194 | fHistCosPA = new TH1F("fHistCosPA", "Cosine of Pointing Angle of V0s; Cos PA; N(v0s)",202,0.8,1.01); | |
195 | fHistDCAV0Daughters = new TH1F("fHistDCAV0Daughters", "DCA between V0 daughters; DCA (cm); N V0s", 100, 0, 2); | |
196 | fHistDecayL = new TH1F("fHistDecayL", "Distance between V0 and PV; Distance(cm); N(v0s)",200,-0.1,30); | |
197 | fHistImpactxyN = new TH1F("fHistImpactxyN", "RSM DCA between negative particle and primary vertex in xy plane; RSM DCA (cm); N(v0s)",100,0,1); | |
198 | fHistImpactzN = new TH1F("fHistImpactzN", "RSM DCA between negative particle and primary vertex in z direction; RSM DCA (cm); N(v0s)",100,0,1); | |
199 | fHistImpactxyP = new TH1F("fHistImpactxyP", "RSM DCA between positive particle and primary vertex in xy plane; RSM DCA (cm); N(v0s)",100,0,1); | |
200 | fHistImpactzP = new TH1F("fHistImpactzP", "RSM DCA between positive particle and primary vertex in z direction; RSM DCA (cm); N(v0s)",100,0,1); | |
201 | fHistMCLambdacTau = new TH1F("fHistMCLambdacTau", "Lifetime under Lambda mass hypothesis of MC lambda; Lifetime(s); N(v0s)",200,0,100); | |
202 | fHistMCLambdaNotcTau = new TH1F("fHistMCLambdaNotcTau", "Lifetime under Lambda mass hypothesis of MC lambda background; Lifetime(s); N(v0s)",200,0,100); | |
203 | fHistMCLambdaDecayL = new TH1F("fHistMCLambdaDecayL", "Distance between V0 and PV of MC Lambda; Distance(cm); N(v0s)",200,-0.1,30); | |
204 | fHistMCLambdaNotDecayL = new TH1F("fHistMCLambdaNotDecayL", "Distance between V0 and PV of MC Lambda background; Distance(cm); N(v0s)",200,-0.1,30); | |
205 | fHistMcNLambdaPrimary = new TH1F("fHistMcNLambdaPrimary","Number of primary lambdas in MC; NLambdas; i",6,-0.25,2.25); | |
206 | fHistMcNLambda = new TH1F("fHistMcNLambda","Number of lambdas in MC; NLambdas; i",31,-0.5,30); | |
207 | fHistMcNAntilambda = new TH1F("fHistMcNAntilambda","Number of antilambdas in MC; NAntiLambdas; i",31,-0.5,30); | |
208 | fHistMcNKshort = new TH1F("fHistMcNKshort","Number of K0s in MC; NKshort; i",31,-0.5,30); | |
209 | fHistMK0 = new TH1F("fHistMK0","K0Short Mass; M(#pi^{+}#pi^{-}) (GeV/c^{2}); dN/dM (0.12 GeV/c^{2})^{-1}",140,0.414,0.582); | |
210 | fHistMLa = new TH1F("fHistMLa","Lambda Mass; M(p#pi^{-}) (GeV/c^{2}); dN/dM (0.125 GeV/c^{2})^{-1}",div,min,max); | |
211 | fHistMLb = new TH1F("fHistMLb","AntiLambda Mass; M(#bar{p}#pi^{+}) (GeV/c^{2}); dN/dM (0.125 GeV/c^{2})^{-1}",div,min,max); | |
212 | fHistNLambda = new TH1F("fHistNLambda", "Number of lambda per event; N(lambda); N(events)",50,-0.5,49.5); | |
213 | fHistNV0 = new TH1F("fHistNV0","V0 frequency distribution; Number of V0 Candidates",1000,0,100000); | |
214 | fHistPtV0 = new TH1F("fHistPtV0","V0 P_{T}; P_{T} (GeV/c);dN/dP_{T} (GeV/c)^{-1}",40,0.,4.); | |
215 | fHistPVZ = new TH1F("fHistPVZ","Z primary; Z (cm); Counts",100,-10,10); | |
216 | fHistTauLa = new TH1F("fHistTauLa", "Lifetime under Lambda mass hypothesis; Lifetime(s); N(v0s)",200,0,100); | |
217 | fHistV0Z = new TH1F("fHistV0Z","Z decay; Z (cm); Counts",100,-10,10); | |
218 | fHistZ = new TH1F("fHistZ","Z decay - Z primary; Z (cm); Counts",100,-10,10); | |
219 | ||
220 | //TH2F follow | |
221 | fHistBetheBlochTPCNeg = new TH2F("fHistBetheBlochTPCNeg","-dE/dX against Momentum for negative daughter from TPC; Log10 P (GeV); -dE/dx (keV/cm ?)",1000,-1,1,1000,0,200); | |
222 | fHistBetheBlochTPCPos = new TH2F("fHistBetheBlochTPCPos","-dE/dX against Momentum for positive daughter from TPC; Log10 P (GeV); -dE/dx (keV/cm ?)",1000,-1,1,1000,0,200); | |
223 | fHistImpactxyImpactz = new TH2F("fHistImpactxyImpactz", "RSM DCA between negative particle and primary vertex in xy plane; RSM DCA xy (cm); RSM DCA z (cm)",100,0,1,100,0,10); | |
224 | fHistMcPMK0Pt = new TH2F("fHistMcPMK0Pt","Monte Carlo primary K0 Mass versus Pt; P_{perp} (GeV/c); K0 Mass (GeV/c^2)",200,0,10,140,0.414,0.582); | |
225 | fHistMcPMLaPt = new TH2F("fHistMcPMLaPt","Monte Carlo primary (& sigma0) Lambda Mass versus Pt; P_{perp} (GeV/c); M(p#pi^{-}) (GeV/c^2)",200,0,10,96,1.08,1.2); | |
226 | fHistMcPMLbPt = new TH2F("fHistMcPMLbPt","Monte Carlo primary (& sigma0) AntiLambda Mass versus Pt; P_{perp} (GeV/c); M(#bar{p}#pi^{+}) (GeV/c^2)",200,0,10,96,1.08,1.2); | |
227 | fHistMcV0MK0Pt = new TH2F("fHistMcV0MK0Pt","Monte Carlo V0s passing cuts. K0 Mass versus Pt; P_{perp} (GeV/c); K0 Mass (GeV/c^2)",200,0,10,140,0.414,0.582); | |
228 | fHistMcV0MLaPt = new TH2F("fHistMcV0MLaPt","Monte Carlo V0s passing cuts. Lambda Mass versus Pt; P_{perp} (GeV/c); Lambda Mass (GeV/c^2)",200,0,10,96,1.08,1.2); | |
229 | fHistMcV0MLbPt = new TH2F("fHistMcV0MLbPt","Monte Carlo V0s passing cuts. Antilambda Mass versus Pt; P_{perp} (GeV/c); Antilambda Mass (GeV/c^2)",200,0,10,96,1.08,1.2); | |
230 | fHistMK0Pt = new TH2F("fHistMK0Pt","K0 Mass versus Pt; P_{perp} (GeV/c); K0 Mass (GeV/c^2)",200,0,10,140,0.414,0.582); | |
231 | fHistMLaPt = new TH2F("fHistMLaPt","Lambda Mass versus Pt; P_{perp} (GeV/c); M(p#pi^{-}) (GeV/c^2)",200,0,10,96,1.08,1.2); | |
232 | fHistMLbPt = new TH2F("fHistMLbPt","AntiLambda Mass versus Pt; P_{perp} (GeV/c); M(#bar{p}#pi^{+}) (GeV/c^2)",200,0,10,96,1.08,1.2); | |
233 | fHistPtArm = new TH2F("fHistPtArm","Podolanski-Armenteros Plot; #alpha; P_{perp} (GeV/c)",40,-1,1,80,0,0.5); | |
234 | fHistPtV0Z = new TH2F("fHistPtV0Z","Pt of V0 vs Z position; Pt (GeV/c); Z (cm)",200,-0.1,1.9,200,-50,50); | |
235 | fHistRZ = new TH2F("fHistRZ","R decay versus Z decay; Z (cm); R (cm)",100,-50,50,120,0,220); | |
236 | fHistXZ = new TH2F("fHistXZ","X decay versus Z decay; Z (cm); X (cm)",100,-50,50,200,-200,200); | |
237 | fHistYZ = new TH2F("fHistYZ","Y decay versus Z decay; Z (cm); Y (cm)",100,-50,50,200,-200,200); | |
238 | ||
239 | ||
240 | ||
241 | // All histograms must be added to output list | |
242 | ||
243 | fOutputList->Add(fHistCosPA); | |
244 | fOutputList->Add(fHistDCAV0Daughters); | |
245 | fOutputList->Add(fHistDecayL); | |
246 | fOutputList->Add(fHistImpactxyN); | |
247 | fOutputList->Add(fHistImpactzN); | |
248 | fOutputList->Add(fHistImpactxyP); | |
249 | fOutputList->Add(fHistImpactzP); | |
250 | fOutputList->Add(fHistMCLambdacTau); | |
251 | fOutputList->Add(fHistMCLambdaNotcTau); | |
252 | fOutputList->Add(fHistMCLambdaDecayL); | |
253 | fOutputList->Add(fHistMCLambdaNotDecayL); | |
254 | fOutputList->Add(fHistMcNLambdaPrimary); | |
255 | fOutputList->Add(fHistMcNLambda); | |
256 | fOutputList->Add(fHistMcNAntilambda); | |
257 | fOutputList->Add(fHistMcNKshort); | |
258 | fOutputList->Add(fHistMK0); | |
259 | fOutputList->Add(fHistMLa); | |
260 | fOutputList->Add(fHistMLb); | |
261 | fOutputList->Add(fHistNLambda); | |
262 | fOutputList->Add(fHistNV0); | |
263 | fOutputList->Add(fHistPtV0); | |
264 | fOutputList->Add(fHistPVZ); | |
265 | fOutputList->Add(fHistTauLa); | |
266 | fOutputList->Add(fHistV0Z); | |
267 | fOutputList->Add(fHistZ); | |
268 | fOutputList->Add(fHistBetheBlochTPCNeg); | |
269 | fOutputList->Add(fHistBetheBlochTPCPos); | |
270 | fOutputList->Add(fHistImpactxyImpactz); | |
271 | fOutputList->Add(fHistMcPMK0Pt); | |
272 | fOutputList->Add(fHistMcPMLaPt); | |
273 | fOutputList->Add(fHistMcPMLbPt); | |
274 | fOutputList->Add(fHistMcV0MK0Pt); | |
275 | fOutputList->Add(fHistMcV0MLaPt); | |
276 | fOutputList->Add(fHistMcV0MLbPt); | |
277 | fOutputList->Add(fHistMK0Pt); | |
278 | fOutputList->Add(fHistMLaPt); | |
279 | fOutputList->Add(fHistMLbPt); | |
280 | fOutputList->Add(fHistPtArm); | |
281 | fOutputList->Add(fHistRZ); | |
282 | fOutputList->Add(fHistXZ); | |
283 | fOutputList->Add(fHistYZ); | |
284 | ||
285 | ||
286 | PostData(1, fOutputList); // Post data for ALL output slots >0 here, to get at least an empty histogram | |
287 | } | |
288 | ||
289 | //________________________________________________________________________ | |
290 | void AliAnalysisTaskLukeV0::UserExec(Option_t *) | |
291 | { | |
292 | // Main loop | |
293 | // Called for each event | |
294 | ||
295 | // paramaters used for most cuts, to minimise editing | |
296 | double cutCosPa(0.998), cutcTau(2); | |
297 | double cutNImpact(-999), cutDCA(0.4); | |
298 | double cutBetheBloch(3); | |
299 | double cutMinNClustersTPC(70), cutMaxChi2PerClusterTPC(-999); | |
300 | double isMonteCarlo(true); | |
301 | double cutEta(0.8); | |
302 | ||
303 | //Track Cuts set here | |
304 | if(cutMinNClustersTPC != -999) | |
305 | {(fTrackCuts->SetMinNClustersTPC(int(cutMinNClustersTPC)));} | |
306 | if(cutMaxChi2PerClusterTPC != -999) | |
307 | {fTrackCuts->SetMaxChi2PerClusterTPC(cutMaxChi2PerClusterTPC);} | |
308 | fTrackCuts->SetAcceptKinkDaughters(kFALSE); | |
309 | fTrackCuts->SetRequireTPCRefit(kTRUE); | |
310 | ||
311 | ||
312 | // Create pointer to reconstructed event | |
313 | ||
314 | AliVEvent *event = InputEvent(); | |
315 | if (!event) { Printf("ERROR: Could not retrieve event"); return; } | |
316 | ||
317 | // create pointer to event | |
318 | AliESDEvent* fESD = dynamic_cast<AliESDEvent*>(event); | |
319 | if (!fESD) { | |
320 | AliError("Cannot get the ESD event"); | |
321 | return; | |
322 | } | |
323 | ||
324 | /*********************************************************************/ | |
325 | // MONTE CARLO SECTION | |
326 | // This section loops over all MC tracks | |
327 | ||
328 | int nLambdaMC = 0; | |
329 | int nAntilambdaMC = 0; | |
330 | int nKshortMC = 0; | |
331 | ||
332 | if(isMonteCarlo) | |
333 | { | |
334 | ||
335 | // If the task accesses MC info, this can be done as in the commented block below: | |
336 | ||
337 | // Create pointer to reconstructed event | |
338 | AliMCEvent *mcEvent = MCEvent(); | |
339 | if (!mcEvent) | |
340 | { | |
341 | Printf("ERROR: Could not retrieve MC event"); | |
342 | //return; | |
343 | } | |
344 | else | |
345 | { | |
346 | Printf("MC particles: %d", mcEvent->GetNumberOfTracks()); | |
347 | } | |
348 | ||
349 | // set up a stack for use in check for primary/stable particles | |
350 | AliStack* mcStack = mcEvent->Stack(); | |
351 | if( !mcStack ) { Printf( "Stack not available"); return; } | |
352 | ||
353 | AliMCVertex *mcpv = (AliMCVertex *) mcEvent->GetPrimaryVertex(); | |
354 | Double_t mcpvPos[3]; | |
355 | if (mcpv != 0) | |
356 | { | |
357 | mcpv->GetXYZ(mcpvPos); | |
358 | } | |
359 | else | |
360 | { | |
361 | Printf("ERROR: Could not resolve MC primary vertex"); | |
362 | return; | |
363 | } | |
364 | ||
365 | //loop over all MC tracks | |
366 | for(Int_t iMCtrack = 0; iMCtrack < mcEvent->GetNumberOfTracks(); iMCtrack++) | |
367 | { | |
368 | ||
369 | //booleans to check if track is La, Lb, K0 and primary | |
370 | bool lambdaMC = false; | |
371 | bool antilambdaMC = false; | |
372 | bool kshortMC = false; | |
373 | bool isprimaryMC = false; | |
374 | ||
375 | AliMCParticle *mcPart = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(iMCtrack)); | |
376 | ||
377 | if(mcPart->PdgCode() == kLambda0) | |
378 | { | |
379 | lambdaMC = true; | |
380 | nLambdaMC++; | |
381 | } | |
382 | else if(mcPart->PdgCode() == kK0Short) | |
383 | { | |
384 | kshortMC = true; | |
385 | nKshortMC++; | |
386 | } | |
387 | else if(mcPart->PdgCode() == kLambda0Bar) | |
388 | { | |
389 | antilambdaMC = true; | |
390 | nAntilambdaMC++; | |
391 | } | |
392 | ||
393 | ||
394 | Int_t motherLabel = mcPart->GetMother(); | |
395 | AliMCParticle *mcMother = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(motherLabel)); | |
396 | double motherType = -1; | |
397 | if(motherLabel >= 0) | |
398 | {motherType = mcMother->PdgCode();} | |
399 | ||
400 | // this block of code is used to include primary Sigma0 decays as primary lambda/antilambda | |
401 | bool sigma0MC = false; | |
402 | if(motherType == 3212 || motherType == -3212) | |
403 | { | |
404 | if(mcEvent->IsPhysicalPrimary(motherLabel)) | |
405 | {sigma0MC = true;} | |
406 | } | |
407 | ||
408 | ||
409 | if(mcEvent->IsPhysicalPrimary(iMCtrack) || sigma0MC) | |
410 | { | |
411 | isprimaryMC = true; | |
412 | if(lambdaMC) | |
413 | { | |
414 | fHistMcNLambdaPrimary->Fill(1); | |
415 | if(TMath::Abs(mcPart->Y())<=0.5) | |
416 | {fHistMcPMLaPt->Fill(mcPart->Pt(),mcPart->M());} | |
417 | } | |
418 | if(antilambdaMC) | |
419 | { | |
420 | if(TMath::Abs(mcPart->Y())<=0.5) | |
421 | {fHistMcPMLbPt->Fill(mcPart->Pt(),mcPart->M());} | |
422 | } | |
423 | if(kshortMC) | |
424 | { | |
425 | if(TMath::Abs(mcPart->Y())<=0.5) | |
426 | {fHistMcPMK0Pt->Fill(mcPart->Pt(),mcPart->M());} | |
427 | } | |
428 | } | |
429 | else | |
430 | { | |
431 | isprimaryMC = false; | |
432 | if(lambdaMC) | |
433 | { | |
434 | fHistMcNLambdaPrimary->Fill(2); | |
435 | } | |
436 | } | |
437 | ||
438 | } | |
439 | ||
440 | ||
441 | } | |
442 | ||
443 | ||
444 | fHistMcNLambda->Fill(nLambdaMC); | |
445 | fHistMcNAntilambda->Fill(nAntilambdaMC); | |
446 | fHistMcNKshort->Fill(nKshortMC); | |
447 | ||
448 | //END OF MONTE CARLO SECTION | |
449 | /*********************************************************************/ | |
450 | ||
451 | ||
452 | ||
453 | ||
454 | ||
455 | // Do some fast cuts first | |
456 | // check for good reconstructed vertex | |
457 | if(!(fESD->GetPrimaryVertex()->GetStatus())) return; | |
458 | // if vertex is from spd vertexZ, require more stringent cut | |
459 | if (fESD->GetPrimaryVertex()->IsFromVertexerZ()) { | |
460 | if (fESD->GetPrimaryVertex()->GetDispersion()>0.02 || fESD->GetPrimaryVertex()->GetZRes()>0.25 ) return; // bad vertex from VertexerZ | |
461 | } | |
462 | ||
463 | Double_t tV0Position[3]; | |
464 | Double_t tPVPosition[3]; | |
465 | Double_t radius; | |
466 | ||
467 | // physics selection | |
468 | UInt_t maskIsSelected = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected(); | |
469 | if(!maskIsSelected) | |
470 | { | |
471 | //printf("Event failed physics selection\n"); | |
472 | return; | |
473 | } | |
474 | ||
475 | //if additional initial cuts wanted, can set conditions here | |
476 | bool isCut = (fESD->GetNumberOfTracks()==0); | |
477 | if (isCut) | |
478 | {return;} | |
479 | ||
480 | //gets primary vertex for the event | |
481 | const AliESDVertex *kPv = ((AliESDEvent *)fESD)->GetPrimaryVertex(); | |
482 | if ( kPv != 0 ) | |
483 | { | |
484 | tPVPosition[0] = kPv->GetXv(); | |
485 | tPVPosition[1] = kPv->GetYv(); | |
486 | tPVPosition[2] = kPv->GetZv(); | |
487 | if( tPVPosition[2] == 0. ) | |
488 | { | |
489 | //printf("WARNING: Primary vertex a Z = 0, aborting\n"); | |
490 | return; | |
491 | } | |
492 | } | |
493 | else | |
494 | { | |
495 | //printf("ERROR: Primary vertex not found\n"); | |
496 | return; | |
497 | } | |
498 | if( !kPv->GetStatus()) | |
499 | {return;} | |
500 | ||
501 | ||
502 | ||
503 | ||
504 | int nLambda(0); | |
505 | int nV0s(0); | |
506 | ||
507 | // V0 loop - runs over every v0 in the event | |
508 | for (Int_t iV0 = 0; iV0 < fESD->GetNumberOfV0s(); iV0++) | |
509 | { | |
510 | ||
511 | AliESDv0 *v0 = fESD->GetV0(iV0); | |
512 | if (!v0) | |
513 | { | |
514 | printf("ERROR: Could not receive v0 %d\n", iV0); | |
515 | continue; | |
516 | } | |
517 | ||
518 | bool lambdaCandidate = true; | |
519 | bool antilambdaCandidate = true; | |
520 | bool kshortCandidate = true; | |
521 | ||
522 | // keep only events of interest for fHistMLa plots | |
523 | ||
524 | if (v0->GetEffMass(4,2) < 1.08 || v0->GetEffMass(4,2) > 1.2 || TMath::Abs(v0->Y(3122))>0.5 ) | |
525 | {lambdaCandidate = false;} | |
526 | if (v0->GetEffMass(2,4) < 1.08 || v0->GetEffMass(2,4) > 1.2 || TMath::Abs(v0->Y(-3122))>0.5) | |
527 | {antilambdaCandidate = false;} | |
528 | if (v0->GetEffMass(2,2) < 0.414 || v0->GetEffMass(2,2) > 0.582 || TMath::Abs(v0->Y(310))>0.5) | |
529 | {kshortCandidate = false;} | |
530 | if (v0->GetOnFlyStatus()) | |
531 | {continue;} | |
532 | ||
533 | if(!isMonteCarlo) | |
534 | {if(lambdaCandidate == false && antilambdaCandidate == false && kshortCandidate == false) | |
535 | {continue;}} | |
536 | ||
537 | ||
538 | //gets details of the v0 | |
539 | v0->GetXYZ(tV0Position[0],tV0Position[1],tV0Position[2]); | |
540 | radius = TMath::Sqrt(tV0Position[0]*tV0Position[0]+tV0Position[1]*tV0Position[1]); | |
541 | ||
542 | double decayLength = (sqrt((tV0Position[0]-tPVPosition[0])*(tV0Position[0]-tPVPosition[0])+(tV0Position[1]-tPVPosition[1])*(tV0Position[1]-tPVPosition[1])+(tV0Position[2]-tPVPosition[2])*(tV0Position[2]-tPVPosition[2]))); | |
543 | double cTauLa = decayLength*(v0->GetEffMass(4,2))/(v0->P()); | |
544 | double cTauLb = decayLength*(v0->GetEffMass(2,4))/(v0->P()); | |
545 | double cTauK0 = decayLength*(v0->GetEffMass(2,2))/(v0->P()); | |
546 | ||
547 | Int_t indexP, indexN; | |
548 | indexP = TMath::Abs(v0->GetPindex()); | |
549 | AliESDtrack *posTrack = ((AliESDEvent*)fESD)->GetTrack(indexP); | |
550 | indexN = TMath::Abs(v0->GetNindex()); | |
551 | AliESDtrack *negTrack = ((AliESDEvent*)fESD)->GetTrack(indexN); | |
552 | ||
553 | if(!posTrack || !negTrack) | |
554 | {continue;} | |
555 | ||
556 | double pTrackMomentum[3]; | |
557 | double nTrackMomentum[3]; | |
558 | double pV0x, pV0y, pV0z; | |
559 | posTrack->GetConstrainedPxPyPz(pTrackMomentum); | |
560 | negTrack->GetConstrainedPxPyPz(nTrackMomentum); | |
561 | v0->GetPxPyPz(pV0x, pV0y, pV0z); | |
562 | ||
563 | //const double kMLambda = 1.115; | |
564 | const double kMProton = 0.938; | |
565 | //const double kMPi = 0.140; | |
566 | ||
567 | double pPos2 = sqrt(pTrackMomentum[0]*pTrackMomentum[0]+pTrackMomentum[1]*pTrackMomentum[1]+pTrackMomentum[2]*pTrackMomentum[2]); | |
568 | double pNeg2 = sqrt(nTrackMomentum[0]*nTrackMomentum[0]+nTrackMomentum[1]*nTrackMomentum[1]+nTrackMomentum[2]*nTrackMomentum[2]); | |
569 | //double pV02 = sqrt(pV0x*pV0x+pV0y*pV0y+pV0z*pV0z); | |
570 | ||
571 | //to prevent segfaults when ratios etc taken | |
572 | //if(pV02 < 0.01 || pPos2 <0.01 || pNeg2 <0.01) | |
573 | //{continue;} | |
574 | ||
575 | Float_t pImpactxy(0), pImpactz(0); | |
576 | Float_t nImpactxy(0), nImpactz(0); | |
577 | posTrack->GetImpactParameters(pImpactxy,pImpactz); | |
578 | negTrack->GetImpactParameters(nImpactxy,nImpactz); | |
579 | nImpactxy = sqrt((nImpactxy*nImpactxy)); | |
580 | nImpactz = sqrt((nImpactz *nImpactz )); | |
581 | pImpactxy = sqrt((pImpactxy*pImpactxy)); | |
582 | pImpactz = sqrt((pImpactz *pImpactz )); | |
583 | ||
584 | /*********************************************************************/ | |
585 | // Cuts are implemented here. | |
586 | ||
587 | if(!(fTrackCuts->IsSelected(posTrack)) || !(fTrackCuts->IsSelected(negTrack))) | |
588 | { | |
589 | lambdaCandidate = false; | |
590 | antilambdaCandidate = false; | |
591 | kshortCandidate = false; | |
592 | } | |
593 | ||
594 | //extra cut to account for difference between p2 & p1 data | |
595 | if(nImpactxy < 0.1 || pImpactxy < 0.1) | |
596 | { | |
597 | lambdaCandidate = false; | |
598 | antilambdaCandidate = false; | |
599 | kshortCandidate = false; | |
600 | } | |
601 | ||
602 | //psuedorapidity cut | |
603 | if(cutEta != -999) | |
604 | { | |
605 | if(TMath::Abs(posTrack->Eta()) > cutEta || TMath::Abs(negTrack->Eta()) >cutEta) | |
606 | { | |
607 | lambdaCandidate = false; | |
608 | antilambdaCandidate = false; | |
609 | kshortCandidate = false; | |
610 | } | |
611 | } | |
612 | ||
613 | //pointing angle cut | |
614 | if(cutCosPa != -999) | |
615 | { | |
616 | if (v0->GetV0CosineOfPointingAngle(tPVPosition[0],tPVPosition[1],tPVPosition[2]) < cutCosPa) | |
617 | { | |
618 | lambdaCandidate = false; | |
619 | antilambdaCandidate = false; | |
620 | kshortCandidate = false; | |
621 | } | |
622 | } | |
623 | ||
624 | //lifetime cut | |
625 | if(cutcTau != -999) | |
626 | { | |
627 | if(cTauLa < cutcTau) | |
628 | { | |
629 | lambdaCandidate = false; | |
630 | } | |
631 | if(cTauLb < cutcTau) | |
632 | { | |
633 | antilambdaCandidate = false; | |
634 | } | |
635 | if(cTauK0 < cutcTau) | |
636 | { | |
637 | kshortCandidate = false; | |
638 | } | |
639 | ||
640 | } | |
641 | ||
642 | // Impact paramater cut (on neg particle) | |
643 | if(cutNImpact != -999) | |
644 | { | |
645 | if(nImpactxy < cutNImpact || nImpactz < cutNImpact) | |
646 | { | |
647 | lambdaCandidate = false; | |
648 | } | |
649 | if(pImpactxy < cutNImpact || pImpactz < cutNImpact) | |
650 | { | |
651 | antilambdaCandidate = false; | |
652 | } | |
653 | } | |
654 | ||
655 | ||
656 | // DCA between daughterscut | |
657 | if(cutDCA != -999) | |
658 | { | |
659 | if(v0->GetDcaV0Daughters() > cutDCA) | |
660 | { | |
661 | lambdaCandidate = false; | |
662 | antilambdaCandidate = false; | |
663 | kshortCandidate = false; | |
664 | } | |
665 | } | |
666 | ||
667 | // Bethe Bloch cut. Made sightly complicated as options for crude cuts still included. Should probably reduce to just 'official' cuts | |
668 | if(cutBetheBloch != -999) | |
669 | { | |
670 | if(posTrack->GetTPCsignal() <0 || negTrack->GetTPCsignal()<0) | |
671 | {continue;} | |
672 | ||
673 | if(lambdaCandidate) | |
674 | { | |
675 | if(cutBetheBloch > 0) | |
676 | { | |
677 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(posTrack, AliPID::kProton)) > cutBetheBloch ) | |
678 | {lambdaCandidate = false;} | |
679 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(negTrack, AliPID::kPion)) > cutBetheBloch ) | |
680 | {lambdaCandidate = false;} | |
681 | } | |
682 | ||
683 | if(cutBetheBloch == -4) | |
684 | { | |
685 | if(isMonteCarlo) | |
686 | { | |
687 | double beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+0.9*0.9))),2); | |
688 | double gamma2 = 1.0/(1.0-beta2); | |
689 | if(posTrack->GetTPCsignal() < (2.0/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
690 | {lambdaCandidate = false;} | |
691 | } | |
692 | else | |
693 | { | |
694 | double beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+kMProton*kMProton))),2); | |
695 | double gamma2 = 1.0/(1.0-beta2); | |
696 | if(posTrack->GetTPCsignal() < (2.3/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
697 | {lambdaCandidate = false;} | |
698 | } | |
699 | } | |
700 | ||
701 | } | |
702 | ||
703 | if(antilambdaCandidate) | |
704 | { | |
705 | if(cutBetheBloch > 0) | |
706 | { | |
707 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(negTrack, AliPID::kProton)) > cutBetheBloch ) | |
708 | {antilambdaCandidate = false;} | |
709 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(posTrack, AliPID::kPion)) > cutBetheBloch ) | |
710 | {antilambdaCandidate = false;} | |
711 | } | |
712 | ||
713 | if(cutBetheBloch == -4) | |
714 | { | |
715 | if(isMonteCarlo) | |
716 | { | |
717 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+0.9*0.9))),2); | |
718 | double gamma2 = 1.0/(1.0-beta2); | |
719 | if(negTrack->GetTPCsignal() < (2.0/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
720 | {antilambdaCandidate = false;} | |
721 | } | |
722 | else | |
723 | { | |
724 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+0.9*0.9))),2); | |
725 | double gamma2 = 1.0/(1.0-beta2); | |
726 | if(negTrack->GetTPCsignal() < (2.3/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
727 | {antilambdaCandidate = false;} | |
728 | } | |
729 | } | |
730 | ||
731 | } | |
732 | ||
733 | if(kshortCandidate) | |
734 | { | |
735 | if(cutBetheBloch > 0) | |
736 | { | |
737 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(negTrack, AliPID::kPion)) > cutBetheBloch ) | |
738 | {kshortCandidate = false;} | |
739 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(posTrack, AliPID::kPion)) > cutBetheBloch ) | |
740 | {kshortCandidate = false;} | |
741 | } | |
742 | ||
743 | ||
744 | if(cutBetheBloch == -4) | |
745 | { | |
746 | double par0 = 0.20; | |
747 | double par1 = 4.2; | |
748 | double par2 = 1000000; | |
749 | ||
750 | if(isMonteCarlo) | |
751 | { | |
752 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+par0*par0))),2); | |
753 | double gamma2 = 1.0/(1.0-beta2); | |
754 | if(negTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pNeg2) > -0.6) | |
755 | {kshortCandidate = false;} | |
756 | ||
757 | beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+par0*par0))),2); | |
758 | gamma2 = 1.0/(1.0-beta2); | |
759 | if(posTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pNeg2) > -0.6) | |
760 | {kshortCandidate = false;} | |
761 | } | |
762 | else | |
763 | { | |
764 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+par0*par0))),2); | |
765 | double gamma2 = 1.0/(1.0-beta2); | |
766 | if(negTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pNeg2) > -0.6) | |
767 | {kshortCandidate = false;} | |
768 | ||
769 | beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+par0*par0))),2); | |
770 | gamma2 = 1.0/(1.0-beta2); | |
771 | if(posTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pPos2) > -0.6) | |
772 | {kshortCandidate = false;} | |
773 | } | |
774 | } | |
775 | ||
776 | } | |
777 | } | |
778 | ||
779 | // Selection of random cuts which I've been playing with | |
780 | /*if(nImpactxy > 3 || pImpactxy > 2) | |
781 | { | |
782 | lambdaCandidate = false; | |
783 | }*/ | |
784 | ||
785 | /*if(nImpactxy < 0.4 || pImpactxy < 0.4 || nImpactxy > 2.5 || pImpactxy >2.5) | |
786 | { | |
787 | antilambdaCandidate = false; | |
788 | } */ | |
789 | ||
790 | if(decayLength > 15 ) | |
791 | {lambdaCandidate = false;} | |
792 | ||
793 | // Cuts to look at just lowpt region of lambdas | |
794 | //if(v0->Pt() < 0.3 || v0->Pt() > 0.7 || !lambdaCandidate) | |
795 | //{continue;} | |
796 | ||
797 | // cuts to just look at signal/background region of lambda mass | |
798 | //if(!((v0->GetEffMass(4,2) >= 1.096 && v0->GetEffMass(4,2) < 1.106) || (v0->GetEffMass(4,2) >= 1.126 && v0->GetEffMass(4,2) < 1.136) )) | |
799 | //if(!(v0->GetEffMass(4,2) >= 1.106 && v0->GetEffMass(4,2) < 1.126 )) | |
800 | //{continue;} | |
801 | /*********************************************************************/ | |
802 | ||
803 | /*********************************************************************/ | |
804 | // MONTE CARLO SECTION 2 | |
805 | // this section looks at the individual V0s | |
806 | ||
807 | bool mcLambdaCandidate = true; | |
808 | bool mcAntilambdaCandidate = true; | |
809 | bool mcK0Candidate = true; | |
810 | bool realParticle = true; | |
811 | ||
812 | if(isMonteCarlo) | |
813 | { | |
814 | ||
815 | AliMCEvent *mcEvent = MCEvent(); | |
816 | AliStack* mcStack = mcEvent->Stack(); | |
817 | if( !mcStack ) { Printf( "Stack not available"); return; } | |
818 | ||
819 | TParticle *negParticle = mcStack->Particle( TMath::Abs(negTrack->GetLabel())); | |
820 | TParticle *posParticle = mcStack->Particle( TMath::Abs(posTrack->GetLabel())); | |
821 | ||
822 | Int_t negParticleMotherLabel = negParticle->GetFirstMother(); | |
823 | Int_t posParticleMotherLabel = posParticle->GetFirstMother(); | |
824 | ||
825 | if( negParticleMotherLabel == -1 || posParticleMotherLabel == -1) | |
826 | { | |
827 | realParticle = false; | |
828 | mcLambdaCandidate = false; | |
829 | mcAntilambdaCandidate = false; | |
830 | mcK0Candidate =false; | |
831 | } | |
832 | ||
833 | if( negParticleMotherLabel != posParticleMotherLabel) | |
834 | { | |
835 | mcLambdaCandidate = false; | |
836 | mcAntilambdaCandidate = false; | |
837 | mcK0Candidate =false; | |
838 | } | |
839 | ||
840 | if(realParticle == true) | |
841 | { | |
842 | AliMCParticle *mcPart2 = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(negParticleMotherLabel)); | |
843 | ||
844 | if(mcPart2->PdgCode() != kLambda0) | |
845 | {mcLambdaCandidate = false;} | |
846 | if(mcPart2->PdgCode() != kLambda0Bar) | |
847 | {mcAntilambdaCandidate = false;} | |
848 | if(mcPart2->PdgCode() != kK0Short) | |
849 | {mcK0Candidate =false;} | |
850 | ||
851 | if(mcLambdaCandidate && lambdaCandidate) | |
852 | { | |
853 | fHistMcV0MLaPt->Fill(v0->Pt(),v0->GetEffMass(4,2)); | |
854 | } | |
855 | if(mcAntilambdaCandidate && antilambdaCandidate) | |
856 | { | |
857 | fHistMcV0MLbPt->Fill(v0->Pt(),v0->GetEffMass(2,4)); | |
858 | } | |
859 | if(mcK0Candidate && kshortCandidate) | |
860 | { | |
861 | fHistMcV0MK0Pt->Fill(v0->Pt(),v0->GetEffMass(2,2)); | |
862 | } | |
863 | } | |
864 | ||
865 | if(mcLambdaCandidate && lambdaCandidate) | |
866 | { | |
867 | fHistMCLambdacTau->Fill(cTauLa); | |
868 | fHistMCLambdaDecayL->Fill(decayLength); | |
869 | } | |
870 | if(!mcLambdaCandidate && lambdaCandidate) | |
871 | { | |
872 | fHistMCLambdaNotcTau->Fill(cTauLa); | |
873 | fHistMCLambdaNotDecayL->Fill(decayLength); | |
874 | } | |
875 | ||
876 | } | |
877 | ||
878 | ||
879 | // END OF MONTE CARLO SECTION 2 | |
880 | /*********************************************************************/ | |
881 | ||
882 | //remove all non-candidates | |
883 | if(lambdaCandidate == false && antilambdaCandidate == false && kshortCandidate == false) | |
884 | {continue;} | |
885 | ||
886 | ||
887 | //count number of valid v0s | |
888 | nV0s+=1; | |
889 | ||
890 | /*********************************************************************/ | |
891 | //This section fills histograms | |
892 | ||
893 | fHistDCAV0Daughters->Fill(v0->GetDcaV0Daughters()); | |
894 | fHistCosPA->Fill(v0->GetV0CosineOfPointingAngle(tPVPosition[0],tPVPosition[1],tPVPosition[2])); | |
895 | fHistDecayL->Fill(decayLength); | |
896 | fHistTauLa->Fill(cTauLa); | |
897 | ||
898 | fHistBetheBlochTPCPos->Fill(TMath::Log10(pPos2),posTrack->GetTPCsignal()); | |
899 | fHistBetheBlochTPCNeg->Fill(TMath::Log10(pNeg2),negTrack->GetTPCsignal()); | |
900 | ||
901 | fHistImpactxyN->Fill(nImpactxy); | |
902 | fHistImpactzN->Fill(nImpactz); | |
903 | fHistImpactxyP->Fill(pImpactxy); | |
904 | fHistImpactzP->Fill(pImpactz); | |
905 | ||
906 | fHistImpactxyImpactz->Fill(nImpactxy,nImpactz); | |
907 | ||
908 | fHistV0Z->Fill(tV0Position[2]); | |
909 | fHistZ->Fill(tV0Position[2]-tPVPosition[2]); | |
910 | ||
911 | fHistRZ->Fill(tV0Position[2],radius); | |
912 | fHistPtV0Z->Fill(v0->Pt(),tV0Position[2]); | |
913 | ||
914 | fHistPtArm->Fill(v0->AlphaV0(),v0->PtArmV0()); | |
915 | fHistXZ->Fill(tV0Position[2],tV0Position[0]); | |
916 | fHistYZ->Fill(tV0Position[2],tV0Position[1]); | |
917 | fHistPtV0->Fill(v0->Pt()); | |
918 | ||
919 | //effective mass histograms | |
920 | ||
921 | //sets assumed particle type of pos/neg daughters. | |
922 | // 0 = electron, 1 = Muon, 2 = pion, 3 = kaon, 4 = proton. | |
923 | int dPos = 0; | |
924 | int dNeg = 0; | |
925 | ||
926 | // v0->ChangeMassHypothesis(kLambda0); | |
927 | dPos = 4; | |
928 | dNeg = 2; | |
929 | if(v0->GetEffMass(dPos,dNeg) > 1.11 && v0->GetEffMass(dPos,dNeg) < 1.13) | |
930 | { | |
931 | if(!(v0->GetOnFlyStatus())) | |
932 | { | |
933 | nLambda++; | |
934 | } | |
935 | } | |
936 | if(lambdaCandidate) | |
937 | { | |
938 | fHistMLa->Fill(v0->GetEffMass(dPos,dNeg)); | |
939 | fHistMLaPt->Fill(v0->Pt(),v0->GetEffMass(dPos,dNeg)); | |
940 | } | |
941 | ||
942 | // v0->ChangeMassHypothesis(kK0Short); | |
943 | dPos = 2; | |
944 | dNeg = 2; | |
945 | if(kshortCandidate) | |
946 | { | |
947 | fHistMK0->Fill(v0->GetEffMass(dPos,dNeg)); | |
948 | fHistMK0Pt->Fill(v0->Pt(),v0->GetEffMass(dPos,dNeg)); | |
949 | } | |
950 | // v0->ChangeMassHypothesis(kLambda0Bar); | |
951 | dPos = 2; | |
952 | dNeg = 4; | |
953 | if(antilambdaCandidate) | |
954 | { | |
955 | fHistMLb->Fill(v0->GetEffMass(dPos,dNeg)); | |
956 | fHistMLbPt->Fill(v0->Pt(),v0->GetEffMass(dPos,dNeg)); | |
957 | } | |
958 | ||
959 | } | |
960 | ||
961 | ||
962 | fHistPVZ->Fill(tPVPosition[2]); | |
963 | fHistNV0->Fill(nV0s); | |
964 | fHistNLambda->Fill(nLambda); | |
965 | ||
966 | // NEW HISTO should be filled before this point, as PostData puts the | |
967 | // information for this iteration of the UserExec in the container | |
968 | PostData(1, fOutputList); | |
969 | } | |
970 | ||
971 | ||
972 | //________________________________________________________________________ | |
973 | void AliAnalysisTaskLukeV0::Terminate(Option_t *) | |
974 | { | |
975 | // Draw result to screen, or perform fitting, normalizations | |
976 | // Called once at the end of the query | |
977 | ||
978 | fOutputList = dynamic_cast<TList*> (GetOutputData(1)); | |
979 | if(!fOutputList) { Printf("ERROR: could not retrieve TList fOutputList"); return; } | |
980 | ||
981 | } |