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45b90328 | 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 | #include "AliAnalysisTaskLukeV0.h" | |
29 | ||
30 | #include "Riostream.h" | |
31 | #include "TChain.h" | |
32 | #include "TTree.h" | |
33 | #include "TH1F.h" | |
34 | #include "TH2F.h" | |
35 | #include "TCanvas.h" | |
36 | #include "TList.h" | |
37 | #include "TPDGCode.h" | |
38 | ||
39 | #include "AliAnalysisTaskSE.h" | |
40 | #include "AliAnalysisManager.h" | |
41 | #include "AliStack.h" | |
42 | #include "AliESDtrackCuts.h" | |
43 | #include "AliESDEvent.h" | |
44 | #include "AliESDv0.h" | |
45 | #include "AliESDInputHandler.h" | |
46 | #include "AliAODEvent.h" | |
47 | #include "AliMCEvent.h" | |
48 | #include "AliMCVertex.h" | |
49 | #include "AliPID.h" | |
50 | #include "AliPIDResponse.h" | |
51 | ||
52 | ClassImp(AliAnalysisTaskLukeV0) | |
53 | ||
54 | //________________________________________________________________________ | |
55 | AliAnalysisTaskLukeV0::AliAnalysisTaskLukeV0() // All data members should be initialised here | |
56 | :AliAnalysisTaskSE(), | |
57 | fOutputList(0), | |
58 | fTrackCuts(0), | |
59 | fPIDResponse(0), | |
45b90328 | 60 | fHistCosPA(0), |
45b90328 | 61 | fHistDCAV0Daughters(0), |
62 | fHistDecayL(0), | |
45b90328 | 63 | fHistImpactxyN(0), |
64 | fHistImpactzN(0), | |
65 | fHistImpactxyP(0), | |
66 | fHistImpactzP(0), | |
889bc324 | 67 | fHistMCLambdacTau(0), |
68 | fHistMCLambdaNotcTau(0), | |
69 | fHistMCLambdaDecayL(0), | |
70 | fHistMCLambdaNotDecayL(0), | |
45b90328 | 71 | fHistMcNLambdaPrimary(0), |
72 | fHistMcNLambda(0), | |
73 | fHistMcNAntilambda(0), | |
74 | fHistMcNKshort(0), | |
45b90328 | 75 | fHistMK0(0), |
45b90328 | 76 | fHistMLa(0), |
45b90328 | 77 | fHistMLb(0), |
45b90328 | 78 | fHistNLambda(0), |
79 | fHistNV0(0), | |
45b90328 | 80 | fHistPtV0(0), |
81 | fHistPVZ(0), | |
82 | fHistTauLa(0), | |
45b90328 | 83 | fHistV0Z(0), |
84 | fHistZ(0), | |
45b90328 | 85 | fHistBetheBlochTPCNeg(0), |
86 | fHistBetheBlochTPCPos(0), | |
45b90328 | 87 | fHistImpactxyImpactz(0), |
45b90328 | 88 | fHistMcPMK0Pt(0), |
89 | fHistMcPMLaPt(0), | |
90 | fHistMcPMLbPt(0), | |
45b90328 | 91 | fHistMcV0MK0Pt(0), |
92 | fHistMcV0MLaPt(0), | |
93 | fHistMcV0MLbPt(0), | |
45b90328 | 94 | fHistMK0Pt(0), |
45b90328 | 95 | fHistMLaPt(0), |
45b90328 | 96 | fHistMLbPt(0), |
45b90328 | 97 | fHistPtArm(0), |
45b90328 | 98 | fHistRZ(0), |
45b90328 | 99 | fHistXZ(0), |
100 | fHistYZ(0) // The last in the above list should not have a comma after it | |
101 | { | |
102 | // Dummy constructor ALWAYS needed for I/O. | |
103 | } | |
104 | ||
105 | //________________________________________________________________________ | |
106 | AliAnalysisTaskLukeV0::AliAnalysisTaskLukeV0(const char *name) // All data members should be initialised here | |
107 | :AliAnalysisTaskSE(name), | |
889bc324 | 108 | fOutputList(0), |
45b90328 | 109 | fTrackCuts(0), |
110 | fPIDResponse(0), | |
45b90328 | 111 | fHistCosPA(0), |
45b90328 | 112 | fHistDCAV0Daughters(0), |
113 | fHistDecayL(0), | |
45b90328 | 114 | fHistImpactxyN(0), |
115 | fHistImpactzN(0), | |
116 | fHistImpactxyP(0), | |
117 | fHistImpactzP(0), | |
889bc324 | 118 | fHistMCLambdacTau(0), |
119 | fHistMCLambdaNotcTau(0), | |
120 | fHistMCLambdaDecayL(0), | |
121 | fHistMCLambdaNotDecayL(0), | |
45b90328 | 122 | fHistMcNLambdaPrimary(0), |
123 | fHistMcNLambda(0), | |
124 | fHistMcNAntilambda(0), | |
125 | fHistMcNKshort(0), | |
45b90328 | 126 | fHistMK0(0), |
45b90328 | 127 | fHistMLa(0), |
45b90328 | 128 | fHistMLb(0), |
45b90328 | 129 | fHistNLambda(0), |
130 | fHistNV0(0), | |
45b90328 | 131 | fHistPtV0(0), |
132 | fHistPVZ(0), | |
133 | fHistTauLa(0), | |
45b90328 | 134 | fHistV0Z(0), |
135 | fHistZ(0), | |
45b90328 | 136 | fHistBetheBlochTPCNeg(0), |
137 | fHistBetheBlochTPCPos(0), | |
45b90328 | 138 | fHistImpactxyImpactz(0), |
45b90328 | 139 | fHistMcPMK0Pt(0), |
140 | fHistMcPMLaPt(0), | |
141 | fHistMcPMLbPt(0), | |
45b90328 | 142 | fHistMcV0MK0Pt(0), |
143 | fHistMcV0MLaPt(0), | |
144 | fHistMcV0MLbPt(0), | |
45b90328 | 145 | fHistMK0Pt(0), |
45b90328 | 146 | fHistMLaPt(0), |
45b90328 | 147 | fHistMLbPt(0), |
45b90328 | 148 | fHistPtArm(0), |
45b90328 | 149 | fHistRZ(0), |
45b90328 | 150 | fHistXZ(0), |
889bc324 | 151 | fHistYZ(0) // The last in the above list should not have a comma after it |
45b90328 | 152 | { |
153 | // Constructor | |
154 | // Define input and output slots here (never in the dummy constructor) | |
155 | // Input slot #0 works with a TChain - it is connected to the default input container | |
156 | // Output slot #1 writes into a TH1 container | |
157 | DefineOutput(1, TList::Class()); // for output list | |
158 | } | |
159 | ||
160 | //________________________________________________________________________ | |
161 | AliAnalysisTaskLukeV0::~AliAnalysisTaskLukeV0() | |
162 | { | |
163 | // Destructor. Clean-up the output list, but not the histograms that are put inside | |
164 | // (the list is owner and will clean-up these histograms). Protect in PROOF case. | |
165 | if (fOutputList && !AliAnalysisManager::GetAnalysisManager()->IsProofMode()) { | |
166 | delete fOutputList; | |
167 | } | |
168 | if (fTrackCuts) delete fTrackCuts; | |
169 | } | |
170 | ||
171 | //________________________________________________________________________ | |
172 | void AliAnalysisTaskLukeV0::UserCreateOutputObjects() | |
173 | { | |
174 | // Create histograms | |
175 | // Called once (on the worker node) | |
176 | ||
177 | fOutputList = new TList(); | |
178 | fOutputList->SetOwner(); // IMPORTANT! | |
179 | ||
180 | fTrackCuts = new AliESDtrackCuts(); | |
181 | ||
182 | AliAnalysisManager *man=AliAnalysisManager::GetAnalysisManager(); | |
183 | AliInputEventHandler* inputHandler = (AliInputEventHandler*) (man->GetInputEventHandler()); | |
184 | fPIDResponse = inputHandler->GetPIDResponse(); | |
185 | ||
45b90328 | 186 | // lambda plot parameters |
187 | int div = 96; | |
188 | float max = 1.2; | |
189 | float min = 1.08; | |
190 | ||
191 | // Create remaining histograms | |
192 | // TH1F first | |
45b90328 | 193 | fHistCosPA = new TH1F("fHistCosPA", "Cosine of Pointing Angle of V0s; Cos PA; N(v0s)",202,0.8,1.01); |
45b90328 | 194 | fHistDCAV0Daughters = new TH1F("fHistDCAV0Daughters", "DCA between V0 daughters; DCA (cm); N V0s", 100, 0, 2); |
195 | fHistDecayL = new TH1F("fHistDecayL", "Distance between V0 and PV; Distance(cm); N(v0s)",200,-0.1,30); | |
45b90328 | 196 | fHistImpactxyN = new TH1F("fHistImpactxyN", "RSM DCA between negative particle and primary vertex in xy plane; RSM DCA (cm); N(v0s)",100,0,1); |
197 | fHistImpactzN = new TH1F("fHistImpactzN", "RSM DCA between negative particle and primary vertex in z direction; RSM DCA (cm); N(v0s)",100,0,1); | |
198 | fHistImpactxyP = new TH1F("fHistImpactxyP", "RSM DCA between positive particle and primary vertex in xy plane; RSM DCA (cm); N(v0s)",100,0,1); | |
199 | fHistImpactzP = new TH1F("fHistImpactzP", "RSM DCA between positive particle and primary vertex in z direction; RSM DCA (cm); N(v0s)",100,0,1); | |
889bc324 | 200 | fHistMCLambdacTau = new TH1F("fHistMCLambdacTau", "Lifetime under Lambda mass hypothesis of MC lambda; Lifetime(s); N(v0s)",200,0,100); |
201 | fHistMCLambdaNotcTau = new TH1F("fHistMCLambdaNotcTau", "Lifetime under Lambda mass hypothesis of MC lambda background; Lifetime(s); N(v0s)",200,0,100); | |
202 | fHistMCLambdaDecayL = new TH1F("fHistMCLambdaDecayL", "Distance between V0 and PV of MC Lambda; Distance(cm); N(v0s)",200,-0.1,30); | |
203 | fHistMCLambdaNotDecayL = new TH1F("fHistMCLambdaNotDecayL", "Distance between V0 and PV of MC Lambda background; Distance(cm); N(v0s)",200,-0.1,30); | |
45b90328 | 204 | fHistMcNLambdaPrimary = new TH1F("fHistMcNLambdaPrimary","Number of primary lambdas in MC; NLambdas; i",6,-0.25,2.25); |
205 | fHistMcNLambda = new TH1F("fHistMcNLambda","Number of lambdas in MC; NLambdas; i",31,-0.5,30); | |
206 | fHistMcNAntilambda = new TH1F("fHistMcNAntilambda","Number of antilambdas in MC; NAntiLambdas; i",31,-0.5,30); | |
207 | fHistMcNKshort = new TH1F("fHistMcNKshort","Number of K0s in MC; NKshort; i",31,-0.5,30); | |
45b90328 | 208 | 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); |
45b90328 | 209 | fHistMLa = new TH1F("fHistMLa","Lambda Mass; M(p#pi^{-}) (GeV/c^{2}); dN/dM (0.125 GeV/c^{2})^{-1}",div,min,max); |
45b90328 | 210 | fHistMLb = new TH1F("fHistMLb","AntiLambda Mass; M(#bar{p}#pi^{+}) (GeV/c^{2}); dN/dM (0.125 GeV/c^{2})^{-1}",div,min,max); |
45b90328 | 211 | fHistNLambda = new TH1F("fHistNLambda", "Number of lambda per event; N(lambda); N(events)",50,-0.5,49.5); |
212 | fHistNV0 = new TH1F("fHistNV0","V0 frequency distribution; Number of V0 Candidates",1000,0,100000); | |
45b90328 | 213 | fHistPtV0 = new TH1F("fHistPtV0","V0 P_{T}; P_{T} (GeV/c);dN/dP_{T} (GeV/c)^{-1}",40,0.,4.); |
214 | fHistPVZ = new TH1F("fHistPVZ","Z primary; Z (cm); Counts",100,-10,10); | |
215 | fHistTauLa = new TH1F("fHistTauLa", "Lifetime under Lambda mass hypothesis; Lifetime(s); N(v0s)",200,0,100); | |
45b90328 | 216 | fHistV0Z = new TH1F("fHistV0Z","Z decay; Z (cm); Counts",100,-10,10); |
217 | fHistZ = new TH1F("fHistZ","Z decay - Z primary; Z (cm); Counts",100,-10,10); | |
218 | ||
219 | //TH2F follow | |
45b90328 | 220 | 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); |
221 | 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); | |
45b90328 | 222 | 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); |
45b90328 | 223 | 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); |
224 | 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); | |
225 | 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); | |
45b90328 | 226 | 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); |
227 | 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); | |
228 | 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); | |
45b90328 | 229 | 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); |
45b90328 | 230 | 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); |
45b90328 | 231 | 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); |
45b90328 | 232 | fHistPtArm = new TH2F("fHistPtArm","Podolanski-Armenteros Plot; #alpha; P_{perp} (GeV/c)",40,-1,1,80,0,0.5); |
45b90328 | 233 | fHistPtV0Z = new TH2F("fHistPtV0Z","Pt of V0 vs Z position; Pt (GeV/c); Z (cm)",200,-0.1,1.9,200,-50,50); |
234 | fHistRZ = new TH2F("fHistRZ","R decay versus Z decay; Z (cm); R (cm)",100,-50,50,120,0,220); | |
45b90328 | 235 | fHistXZ = new TH2F("fHistXZ","X decay versus Z decay; Z (cm); X (cm)",100,-50,50,200,-200,200); |
236 | fHistYZ = new TH2F("fHistYZ","Y decay versus Z decay; Z (cm); Y (cm)",100,-50,50,200,-200,200); | |
237 | ||
238 | ||
239 | ||
240 | // All histograms must be added to output list | |
241 | ||
45b90328 | 242 | fOutputList->Add(fHistCosPA); |
45b90328 | 243 | fOutputList->Add(fHistDCAV0Daughters); |
244 | fOutputList->Add(fHistDecayL); | |
45b90328 | 245 | fOutputList->Add(fHistImpactxyN); |
246 | fOutputList->Add(fHistImpactzN); | |
247 | fOutputList->Add(fHistImpactxyP); | |
248 | fOutputList->Add(fHistImpactzP); | |
889bc324 | 249 | fOutputList->Add(fHistMCLambdacTau); |
250 | fOutputList->Add(fHistMCLambdaNotcTau); | |
251 | fOutputList->Add(fHistMCLambdaDecayL); | |
252 | fOutputList->Add(fHistMCLambdaNotDecayL); | |
45b90328 | 253 | fOutputList->Add(fHistMcNLambdaPrimary); |
254 | fOutputList->Add(fHistMcNLambda); | |
255 | fOutputList->Add(fHistMcNAntilambda); | |
256 | fOutputList->Add(fHistMcNKshort); | |
45b90328 | 257 | fOutputList->Add(fHistMK0); |
45b90328 | 258 | fOutputList->Add(fHistMLa); |
45b90328 | 259 | fOutputList->Add(fHistMLb); |
45b90328 | 260 | fOutputList->Add(fHistNLambda); |
261 | fOutputList->Add(fHistNV0); | |
45b90328 | 262 | fOutputList->Add(fHistPtV0); |
263 | fOutputList->Add(fHistPVZ); | |
264 | fOutputList->Add(fHistTauLa); | |
45b90328 | 265 | fOutputList->Add(fHistV0Z); |
266 | fOutputList->Add(fHistZ); | |
45b90328 | 267 | fOutputList->Add(fHistBetheBlochTPCNeg); |
268 | fOutputList->Add(fHistBetheBlochTPCPos); | |
45b90328 | 269 | fOutputList->Add(fHistImpactxyImpactz); |
45b90328 | 270 | fOutputList->Add(fHistMcPMK0Pt); |
271 | fOutputList->Add(fHistMcPMLaPt); | |
272 | fOutputList->Add(fHistMcPMLbPt); | |
45b90328 | 273 | fOutputList->Add(fHistMcV0MK0Pt); |
274 | fOutputList->Add(fHistMcV0MLaPt); | |
275 | fOutputList->Add(fHistMcV0MLbPt); | |
45b90328 | 276 | fOutputList->Add(fHistMK0Pt); |
45b90328 | 277 | fOutputList->Add(fHistMLaPt); |
45b90328 | 278 | fOutputList->Add(fHistMLbPt); |
45b90328 | 279 | fOutputList->Add(fHistPtArm); |
45b90328 | 280 | fOutputList->Add(fHistRZ); |
45b90328 | 281 | fOutputList->Add(fHistXZ); |
282 | fOutputList->Add(fHistYZ); | |
283 | ||
284 | ||
285 | PostData(1, fOutputList); // Post data for ALL output slots >0 here, to get at least an empty histogram | |
286 | } | |
287 | ||
288 | //________________________________________________________________________ | |
289 | void AliAnalysisTaskLukeV0::UserExec(Option_t *) | |
290 | { | |
291 | // Main loop | |
292 | // Called for each event | |
293 | ||
294 | // paramaters used for most cuts, to minimise editing | |
295 | double cutCosPa(0.998), cutcTau(2); | |
296 | double cutNImpact(-999), cutDCA(0.4); | |
297 | double cutBetheBloch(3); | |
298 | double cutMinNClustersTPC(70), cutMaxChi2PerClusterTPC(-999); | |
889bc324 | 299 | double isMonteCarlo(true); |
45b90328 | 300 | double cutEta(0.8); |
301 | ||
302 | //Track Cuts set here | |
303 | if(cutMinNClustersTPC != -999) | |
304 | {(fTrackCuts->SetMinNClustersTPC(int(cutMinNClustersTPC)));} | |
305 | if(cutMaxChi2PerClusterTPC != -999) | |
306 | {fTrackCuts->SetMaxChi2PerClusterTPC(cutMaxChi2PerClusterTPC);} | |
307 | fTrackCuts->SetAcceptKinkDaughters(kFALSE); | |
308 | fTrackCuts->SetRequireTPCRefit(kTRUE); | |
309 | ||
310 | ||
311 | // Create pointer to reconstructed event | |
312 | ||
313 | AliVEvent *event = InputEvent(); | |
314 | if (!event) { Printf("ERROR: Could not retrieve event"); return; } | |
315 | ||
316 | // create pointer to event | |
317 | AliESDEvent* fESD = dynamic_cast<AliESDEvent*>(event); | |
318 | if (!fESD) { | |
319 | AliError("Cannot get the ESD event"); | |
320 | return; | |
321 | } | |
322 | ||
323 | /*********************************************************************/ | |
324 | // MONTE CARLO SECTION | |
325 | // This section loops over all MC tracks | |
326 | ||
327 | int nLambdaMC = 0; | |
328 | int nAntilambdaMC = 0; | |
329 | int nKshortMC = 0; | |
330 | ||
331 | if(isMonteCarlo) | |
332 | { | |
333 | ||
334 | // If the task accesses MC info, this can be done as in the commented block below: | |
335 | ||
336 | // Create pointer to reconstructed event | |
337 | AliMCEvent *mcEvent = MCEvent(); | |
338 | if (!mcEvent) | |
339 | { | |
340 | Printf("ERROR: Could not retrieve MC event"); | |
341 | //return; | |
342 | } | |
343 | else | |
344 | { | |
345 | Printf("MC particles: %d", mcEvent->GetNumberOfTracks()); | |
346 | } | |
347 | ||
348 | // set up a stack for use in check for primary/stable particles | |
349 | AliStack* mcStack = mcEvent->Stack(); | |
350 | if( !mcStack ) { Printf( "Stack not available"); return; } | |
351 | ||
352 | AliMCVertex *mcpv = (AliMCVertex *) mcEvent->GetPrimaryVertex(); | |
353 | Double_t mcpvPos[3]; | |
354 | if (mcpv != 0) | |
355 | { | |
356 | mcpv->GetXYZ(mcpvPos); | |
357 | } | |
358 | else | |
359 | { | |
360 | Printf("ERROR: Could not resolve MC primary vertex"); | |
361 | return; | |
362 | } | |
363 | ||
364 | //loop over all MC tracks | |
365 | for(Int_t iMCtrack = 0; iMCtrack < mcEvent->GetNumberOfTracks(); iMCtrack++) | |
366 | { | |
367 | ||
368 | //booleans to check if track is La, Lb, K0 and primary | |
369 | bool lambdaMC = false; | |
370 | bool antilambdaMC = false; | |
371 | bool kshortMC = false; | |
372 | bool isprimaryMC = false; | |
373 | ||
374 | AliMCParticle *mcPart = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(iMCtrack)); | |
375 | ||
376 | if(mcPart->PdgCode() == kLambda0) | |
377 | { | |
378 | lambdaMC = true; | |
379 | nLambdaMC++; | |
380 | } | |
381 | else if(mcPart->PdgCode() == kK0Short) | |
382 | { | |
383 | kshortMC = true; | |
384 | nKshortMC++; | |
385 | } | |
386 | else if(mcPart->PdgCode() == kLambda0Bar) | |
387 | { | |
388 | antilambdaMC = true; | |
389 | nAntilambdaMC++; | |
390 | } | |
391 | ||
45b90328 | 392 | |
45b90328 | 393 | Int_t motherLabel = mcPart->GetMother(); |
45b90328 | 394 | AliMCParticle *mcMother = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(motherLabel)); |
45b90328 | 395 | double motherType = -1; |
396 | if(motherLabel >= 0) | |
397 | {motherType = mcMother->PdgCode();} | |
398 | ||
889bc324 | 399 | // this block of code is used to include primary Sigma0 decays as primary lambda/antilambda |
45b90328 | 400 | bool sigma0MC = false; |
401 | if(motherType == 3212 || motherType == -3212) | |
402 | { | |
403 | if(mcEvent->IsPhysicalPrimary(motherLabel)) | |
404 | {sigma0MC = true;} | |
405 | } | |
406 | ||
407 | ||
408 | if(mcEvent->IsPhysicalPrimary(iMCtrack) || sigma0MC) | |
409 | { | |
410 | isprimaryMC = true; | |
411 | if(lambdaMC) | |
412 | { | |
413 | fHistMcNLambdaPrimary->Fill(1); | |
45b90328 | 414 | if(TMath::Abs(mcPart->Y())<=0.5) |
889bc324 | 415 | {fHistMcPMLaPt->Fill(mcPart->Pt(),mcPart->M());} |
45b90328 | 416 | } |
417 | if(antilambdaMC) | |
418 | { | |
419 | if(TMath::Abs(mcPart->Y())<=0.5) | |
420 | {fHistMcPMLbPt->Fill(mcPart->Pt(),mcPart->M());} | |
421 | } | |
422 | if(kshortMC) | |
423 | { | |
424 | if(TMath::Abs(mcPart->Y())<=0.5) | |
425 | {fHistMcPMK0Pt->Fill(mcPart->Pt(),mcPart->M());} | |
426 | } | |
427 | } | |
428 | else | |
429 | { | |
430 | isprimaryMC = false; | |
431 | if(lambdaMC) | |
432 | { | |
433 | fHistMcNLambdaPrimary->Fill(2); | |
45b90328 | 434 | } |
435 | } | |
436 | ||
437 | } | |
438 | ||
439 | ||
440 | } | |
441 | ||
442 | ||
443 | fHistMcNLambda->Fill(nLambdaMC); | |
444 | fHistMcNAntilambda->Fill(nAntilambdaMC); | |
445 | fHistMcNKshort->Fill(nKshortMC); | |
446 | ||
447 | //END OF MONTE CARLO SECTION | |
448 | /*********************************************************************/ | |
449 | ||
450 | ||
451 | ||
452 | ||
453 | ||
454 | // Do some fast cuts first | |
455 | // check for good reconstructed vertex | |
456 | if(!(fESD->GetPrimaryVertex()->GetStatus())) return; | |
457 | // if vertex is from spd vertexZ, require more stringent cut | |
458 | if (fESD->GetPrimaryVertex()->IsFromVertexerZ()) { | |
459 | if (fESD->GetPrimaryVertex()->GetDispersion()>0.02 || fESD->GetPrimaryVertex()->GetZRes()>0.25 ) return; // bad vertex from VertexerZ | |
460 | } | |
461 | ||
462 | Double_t tV0Position[3]; | |
463 | Double_t tPVPosition[3]; | |
464 | Double_t radius; | |
465 | ||
466 | // physics selection | |
467 | UInt_t maskIsSelected = ((AliInputEventHandler*)(AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()))->IsEventSelected(); | |
468 | if(!maskIsSelected) | |
469 | { | |
470 | //printf("Event failed physics selection\n"); | |
471 | return; | |
472 | } | |
473 | ||
474 | //if additional initial cuts wanted, can set conditions here | |
475 | bool isCut = (fESD->GetNumberOfTracks()==0); | |
476 | if (isCut) | |
477 | {return;} | |
478 | ||
479 | //gets primary vertex for the event | |
480 | const AliESDVertex *kPv = ((AliESDEvent *)fESD)->GetPrimaryVertex(); | |
481 | if ( kPv != 0 ) | |
482 | { | |
483 | tPVPosition[0] = kPv->GetXv(); | |
484 | tPVPosition[1] = kPv->GetYv(); | |
485 | tPVPosition[2] = kPv->GetZv(); | |
486 | if( tPVPosition[2] == 0. ) | |
487 | { | |
488 | //printf("WARNING: Primary vertex a Z = 0, aborting\n"); | |
489 | return; | |
490 | } | |
491 | } | |
492 | else | |
493 | { | |
494 | //printf("ERROR: Primary vertex not found\n"); | |
495 | return; | |
496 | } | |
497 | if( !kPv->GetStatus()) | |
498 | {return;} | |
499 | ||
500 | ||
501 | ||
502 | ||
503 | int nLambda(0); | |
504 | int nV0s(0); | |
45b90328 | 505 | |
506 | // V0 loop - runs over every v0 in the event | |
507 | for (Int_t iV0 = 0; iV0 < fESD->GetNumberOfV0s(); iV0++) | |
508 | { | |
509 | ||
510 | AliESDv0 *v0 = fESD->GetV0(iV0); | |
511 | if (!v0) | |
512 | { | |
513 | printf("ERROR: Could not receive v0 %d\n", iV0); | |
514 | continue; | |
515 | } | |
516 | ||
517 | bool lambdaCandidate = true; | |
518 | bool antilambdaCandidate = true; | |
519 | bool kshortCandidate = true; | |
520 | ||
521 | // keep only events of interest for fHistMLa plots | |
522 | ||
523 | if (v0->GetEffMass(4,2) < 1.08 || v0->GetEffMass(4,2) > 1.2 || TMath::Abs(v0->Y(3122))>0.5 ) | |
524 | {lambdaCandidate = false;} | |
525 | if (v0->GetEffMass(2,4) < 1.08 || v0->GetEffMass(2,4) > 1.2 || TMath::Abs(v0->Y(-3122))>0.5) | |
526 | {antilambdaCandidate = false;} | |
527 | if (v0->GetEffMass(2,2) < 0.414 || v0->GetEffMass(2,2) > 0.582 || TMath::Abs(v0->Y(310))>0.5) | |
528 | {kshortCandidate = false;} | |
529 | if (v0->GetOnFlyStatus()) | |
530 | {continue;} | |
531 | ||
532 | if(!isMonteCarlo) | |
533 | {if(lambdaCandidate == false && antilambdaCandidate == false && kshortCandidate == false) | |
534 | {continue;}} | |
535 | ||
536 | ||
537 | //gets details of the v0 | |
538 | v0->GetXYZ(tV0Position[0],tV0Position[1],tV0Position[2]); | |
539 | radius = TMath::Sqrt(tV0Position[0]*tV0Position[0]+tV0Position[1]*tV0Position[1]); | |
540 | ||
541 | 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]))); | |
542 | double cTauLa = decayLength*(v0->GetEffMass(4,2))/(v0->P()); | |
543 | double cTauLb = decayLength*(v0->GetEffMass(2,4))/(v0->P()); | |
544 | double cTauK0 = decayLength*(v0->GetEffMass(2,2))/(v0->P()); | |
545 | ||
546 | Int_t indexP, indexN; | |
547 | indexP = TMath::Abs(v0->GetPindex()); | |
548 | AliESDtrack *posTrack = ((AliESDEvent*)fESD)->GetTrack(indexP); | |
549 | indexN = TMath::Abs(v0->GetNindex()); | |
550 | AliESDtrack *negTrack = ((AliESDEvent*)fESD)->GetTrack(indexN); | |
551 | ||
552 | if(!posTrack || !negTrack) | |
553 | {continue;} | |
554 | ||
555 | double pTrackMomentum[3]; | |
556 | double nTrackMomentum[3]; | |
557 | double pV0x, pV0y, pV0z; | |
558 | posTrack->GetConstrainedPxPyPz(pTrackMomentum); | |
559 | negTrack->GetConstrainedPxPyPz(nTrackMomentum); | |
560 | v0->GetPxPyPz(pV0x, pV0y, pV0z); | |
561 | ||
889bc324 | 562 | //const double kMLambda = 1.115; |
45b90328 | 563 | const double kMProton = 0.938; |
889bc324 | 564 | //const double kMPi = 0.140; |
45b90328 | 565 | |
566 | double pPos2 = sqrt(pTrackMomentum[0]*pTrackMomentum[0]+pTrackMomentum[1]*pTrackMomentum[1]+pTrackMomentum[2]*pTrackMomentum[2]); | |
567 | double pNeg2 = sqrt(nTrackMomentum[0]*nTrackMomentum[0]+nTrackMomentum[1]*nTrackMomentum[1]+nTrackMomentum[2]*nTrackMomentum[2]); | |
889bc324 | 568 | //double pV02 = sqrt(pV0x*pV0x+pV0y*pV0y+pV0z*pV0z); |
45b90328 | 569 | |
570 | //to prevent segfaults when ratios etc taken | |
889bc324 | 571 | //if(pV02 < 0.01 || pPos2 <0.01 || pNeg2 <0.01) |
572 | //{continue;} | |
45b90328 | 573 | |
574 | Float_t pImpactxy(0), pImpactz(0); | |
575 | Float_t nImpactxy(0), nImpactz(0); | |
576 | posTrack->GetImpactParameters(pImpactxy,pImpactz); | |
577 | negTrack->GetImpactParameters(nImpactxy,nImpactz); | |
578 | nImpactxy = sqrt((nImpactxy*nImpactxy)); | |
579 | nImpactz = sqrt((nImpactz *nImpactz )); | |
580 | pImpactxy = sqrt((pImpactxy*pImpactxy)); | |
581 | pImpactz = sqrt((pImpactz *pImpactz )); | |
582 | ||
583 | /*********************************************************************/ | |
584 | // Cuts are implemented here. | |
585 | ||
586 | if(!(fTrackCuts->IsSelected(posTrack)) || !(fTrackCuts->IsSelected(negTrack))) | |
587 | { | |
588 | lambdaCandidate = false; | |
589 | antilambdaCandidate = false; | |
590 | kshortCandidate = false; | |
591 | } | |
592 | ||
593 | //extra cut to account for difference between p2 & p1 data | |
594 | if(nImpactxy < 0.1 || pImpactxy < 0.1) | |
595 | { | |
596 | lambdaCandidate = false; | |
597 | antilambdaCandidate = false; | |
598 | kshortCandidate = false; | |
599 | } | |
600 | ||
601 | //psuedorapidity cut | |
602 | if(cutEta != -999) | |
603 | { | |
604 | if(TMath::Abs(posTrack->Eta()) > cutEta || TMath::Abs(negTrack->Eta()) >cutEta) | |
605 | { | |
606 | lambdaCandidate = false; | |
607 | antilambdaCandidate = false; | |
608 | kshortCandidate = false; | |
609 | } | |
610 | } | |
611 | ||
612 | //pointing angle cut | |
613 | if(cutCosPa != -999) | |
614 | { | |
615 | if (v0->GetV0CosineOfPointingAngle(tPVPosition[0],tPVPosition[1],tPVPosition[2]) < cutCosPa) | |
616 | { | |
617 | lambdaCandidate = false; | |
618 | antilambdaCandidate = false; | |
619 | kshortCandidate = false; | |
620 | } | |
621 | } | |
622 | ||
623 | //lifetime cut | |
624 | if(cutcTau != -999) | |
625 | { | |
626 | if(cTauLa < cutcTau) | |
627 | { | |
628 | lambdaCandidate = false; | |
629 | } | |
630 | if(cTauLb < cutcTau) | |
631 | { | |
632 | antilambdaCandidate = false; | |
633 | } | |
634 | if(cTauK0 < cutcTau) | |
635 | { | |
636 | kshortCandidate = false; | |
637 | } | |
638 | ||
639 | } | |
640 | ||
641 | // Impact paramater cut (on neg particle) | |
642 | if(cutNImpact != -999) | |
643 | { | |
644 | if(nImpactxy < cutNImpact || nImpactz < cutNImpact) | |
645 | { | |
646 | lambdaCandidate = false; | |
647 | } | |
648 | if(pImpactxy < cutNImpact || pImpactz < cutNImpact) | |
649 | { | |
650 | antilambdaCandidate = false; | |
651 | } | |
652 | } | |
653 | ||
654 | ||
655 | // DCA between daughterscut | |
656 | if(cutDCA != -999) | |
657 | { | |
658 | if(v0->GetDcaV0Daughters() > cutDCA) | |
659 | { | |
660 | lambdaCandidate = false; | |
661 | antilambdaCandidate = false; | |
662 | kshortCandidate = false; | |
663 | } | |
664 | } | |
665 | ||
666 | // Bethe Bloch cut. Made sightly complicated as options for crude cuts still included. Should probably reduce to just 'official' cuts | |
667 | if(cutBetheBloch != -999) | |
668 | { | |
669 | if(posTrack->GetTPCsignal() <0 || negTrack->GetTPCsignal()<0) | |
670 | {continue;} | |
671 | ||
672 | if(lambdaCandidate) | |
673 | { | |
674 | if(cutBetheBloch > 0) | |
675 | { | |
676 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(posTrack, AliPID::kProton)) > cutBetheBloch ) | |
677 | {lambdaCandidate = false;} | |
678 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(negTrack, AliPID::kPion)) > cutBetheBloch ) | |
679 | {lambdaCandidate = false;} | |
680 | } | |
681 | ||
682 | if(cutBetheBloch == -4) | |
683 | { | |
684 | if(isMonteCarlo) | |
685 | { | |
686 | double beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+0.9*0.9))),2); | |
687 | double gamma2 = 1.0/(1.0-beta2); | |
688 | if(posTrack->GetTPCsignal() < (2.0/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
689 | {lambdaCandidate = false;} | |
690 | } | |
691 | else | |
692 | { | |
693 | double beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+kMProton*kMProton))),2); | |
694 | double gamma2 = 1.0/(1.0-beta2); | |
695 | if(posTrack->GetTPCsignal() < (2.3/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
696 | {lambdaCandidate = false;} | |
697 | } | |
698 | } | |
699 | ||
700 | } | |
701 | ||
702 | if(antilambdaCandidate) | |
703 | { | |
704 | if(cutBetheBloch > 0) | |
705 | { | |
706 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(negTrack, AliPID::kProton)) > cutBetheBloch ) | |
707 | {antilambdaCandidate = false;} | |
708 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(posTrack, AliPID::kPion)) > cutBetheBloch ) | |
709 | {antilambdaCandidate = false;} | |
710 | } | |
711 | ||
712 | if(cutBetheBloch == -4) | |
713 | { | |
714 | if(isMonteCarlo) | |
715 | { | |
716 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+0.9*0.9))),2); | |
717 | double gamma2 = 1.0/(1.0-beta2); | |
718 | if(negTrack->GetTPCsignal() < (2.0/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
719 | {antilambdaCandidate = false;} | |
720 | } | |
721 | else | |
722 | { | |
723 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+0.9*0.9))),2); | |
724 | double gamma2 = 1.0/(1.0-beta2); | |
725 | if(negTrack->GetTPCsignal() < (2.3/beta2)*(TMath::Log(1e6*beta2*gamma2)-beta2)) | |
726 | {antilambdaCandidate = false;} | |
727 | } | |
728 | } | |
729 | ||
730 | } | |
731 | ||
732 | if(kshortCandidate) | |
733 | { | |
734 | if(cutBetheBloch > 0) | |
735 | { | |
736 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(negTrack, AliPID::kPion)) > cutBetheBloch ) | |
737 | {kshortCandidate = false;} | |
738 | if(TMath::Abs(fPIDResponse->NumberOfSigmasTPC(posTrack, AliPID::kPion)) > cutBetheBloch ) | |
739 | {kshortCandidate = false;} | |
740 | } | |
741 | ||
742 | ||
743 | if(cutBetheBloch == -4) | |
744 | { | |
745 | double par0 = 0.20; | |
746 | double par1 = 4.2; | |
747 | double par2 = 1000000; | |
748 | ||
749 | if(isMonteCarlo) | |
750 | { | |
751 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+par0*par0))),2); | |
752 | double gamma2 = 1.0/(1.0-beta2); | |
753 | if(negTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pNeg2) > -0.6) | |
754 | {kshortCandidate = false;} | |
755 | ||
756 | beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+par0*par0))),2); | |
757 | gamma2 = 1.0/(1.0-beta2); | |
758 | if(posTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pNeg2) > -0.6) | |
759 | {kshortCandidate = false;} | |
760 | } | |
761 | else | |
762 | { | |
763 | double beta2 = TMath::Power((pNeg2/TMath::Sqrt((pNeg2*pNeg2+par0*par0))),2); | |
764 | double gamma2 = 1.0/(1.0-beta2); | |
765 | if(negTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pNeg2) > -0.6) | |
766 | {kshortCandidate = false;} | |
767 | ||
768 | beta2 = TMath::Power((pPos2/TMath::Sqrt((pPos2*pPos2+par0*par0))),2); | |
769 | gamma2 = 1.0/(1.0-beta2); | |
770 | if(posTrack->GetTPCsignal() > (par1/beta2)*(TMath::Log(par2*beta2*gamma2)-beta2) && TMath::Log10(pPos2) > -0.6) | |
771 | {kshortCandidate = false;} | |
772 | } | |
773 | } | |
774 | ||
775 | } | |
776 | } | |
777 | ||
778 | // Selection of random cuts which I've been playing with | |
779 | /*if(nImpactxy > 3 || pImpactxy > 2) | |
780 | { | |
781 | lambdaCandidate = false; | |
782 | }*/ | |
783 | ||
784 | /*if(nImpactxy < 0.4 || pImpactxy < 0.4 || nImpactxy > 2.5 || pImpactxy >2.5) | |
785 | { | |
786 | antilambdaCandidate = false; | |
787 | } */ | |
788 | ||
889bc324 | 789 | if(decayLength > 15 ) |
790 | {lambdaCandidate = false;} | |
45b90328 | 791 | |
792 | // Cuts to look at just lowpt region of lambdas | |
889bc324 | 793 | //if(v0->Pt() < 0.3 || v0->Pt() > 0.7 || !lambdaCandidate) |
794 | //{continue;} | |
45b90328 | 795 | |
796 | // cuts to just look at signal/background region of lambda mass | |
797 | //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) )) | |
798 | //if(!(v0->GetEffMass(4,2) >= 1.106 && v0->GetEffMass(4,2) < 1.126 )) | |
799 | //{continue;} | |
800 | /*********************************************************************/ | |
801 | ||
802 | /*********************************************************************/ | |
803 | // MONTE CARLO SECTION 2 | |
804 | // this section looks at the individual V0s | |
805 | ||
806 | bool mcLambdaCandidate = true; | |
807 | bool mcAntilambdaCandidate = true; | |
808 | bool mcK0Candidate = true; | |
45b90328 | 809 | bool realParticle = true; |
810 | ||
811 | if(isMonteCarlo) | |
812 | { | |
813 | ||
814 | AliMCEvent *mcEvent = MCEvent(); | |
815 | AliStack* mcStack = mcEvent->Stack(); | |
816 | if( !mcStack ) { Printf( "Stack not available"); return; } | |
817 | ||
818 | TParticle *negParticle = mcStack->Particle( TMath::Abs(negTrack->GetLabel())); | |
819 | TParticle *posParticle = mcStack->Particle( TMath::Abs(posTrack->GetLabel())); | |
820 | ||
821 | Int_t negParticleMotherLabel = negParticle->GetFirstMother(); | |
822 | Int_t posParticleMotherLabel = posParticle->GetFirstMother(); | |
823 | ||
824 | if( negParticleMotherLabel == -1 || posParticleMotherLabel == -1) | |
825 | { | |
826 | realParticle = false; | |
827 | mcLambdaCandidate = false; | |
828 | mcAntilambdaCandidate = false; | |
829 | mcK0Candidate =false; | |
830 | } | |
831 | ||
45b90328 | 832 | if( negParticleMotherLabel != posParticleMotherLabel) |
833 | { | |
834 | mcLambdaCandidate = false; | |
835 | mcAntilambdaCandidate = false; | |
836 | mcK0Candidate =false; | |
837 | } | |
838 | ||
839 | if(realParticle == true) | |
840 | { | |
841 | AliMCParticle *mcPart2 = dynamic_cast<AliMCParticle *>(mcEvent->GetTrack(negParticleMotherLabel)); | |
889bc324 | 842 | |
45b90328 | 843 | if(mcPart2->PdgCode() != kLambda0) |
844 | {mcLambdaCandidate = false;} | |
845 | if(mcPart2->PdgCode() != kLambda0Bar) | |
846 | {mcAntilambdaCandidate = false;} | |
847 | if(mcPart2->PdgCode() != kK0Short) | |
848 | {mcK0Candidate =false;} | |
889bc324 | 849 | |
45b90328 | 850 | if(mcLambdaCandidate && lambdaCandidate) |
851 | { | |
45b90328 | 852 | fHistMcV0MLaPt->Fill(v0->Pt(),v0->GetEffMass(4,2)); |
853 | } | |
854 | if(mcAntilambdaCandidate && antilambdaCandidate) | |
855 | { | |
45b90328 | 856 | fHistMcV0MLbPt->Fill(v0->Pt(),v0->GetEffMass(2,4)); |
857 | } | |
858 | if(mcK0Candidate && kshortCandidate) | |
859 | { | |
45b90328 | 860 | fHistMcV0MK0Pt->Fill(v0->Pt(),v0->GetEffMass(2,2)); |
861 | } | |
45b90328 | 862 | } |
863 | ||
889bc324 | 864 | if(mcLambdaCandidate && lambdaCandidate) |
45b90328 | 865 | { |
889bc324 | 866 | fHistMCLambdacTau->Fill(cTauLa); |
867 | fHistMCLambdaDecayL->Fill(decayLength); | |
45b90328 | 868 | } |
889bc324 | 869 | if(!mcLambdaCandidate && lambdaCandidate) |
45b90328 | 870 | { |
889bc324 | 871 | fHistMCLambdaNotcTau->Fill(cTauLa); |
872 | fHistMCLambdaNotDecayL->Fill(decayLength); | |
45b90328 | 873 | } |
889bc324 | 874 | |
875 | } | |
876 | ||
45b90328 | 877 | |
878 | // END OF MONTE CARLO SECTION 2 | |
879 | /*********************************************************************/ | |
880 | ||
881 | //remove all non-candidates | |
882 | if(lambdaCandidate == false && antilambdaCandidate == false && kshortCandidate == false) | |
883 | {continue;} | |
884 | ||
885 | ||
886 | //count number of valid v0s | |
887 | nV0s+=1; | |
888 | ||
889 | /*********************************************************************/ | |
890 | //This section fills histograms | |
891 | ||
45b90328 | 892 | fHistDCAV0Daughters->Fill(v0->GetDcaV0Daughters()); |
45b90328 | 893 | fHistCosPA->Fill(v0->GetV0CosineOfPointingAngle(tPVPosition[0],tPVPosition[1],tPVPosition[2])); |
894 | fHistDecayL->Fill(decayLength); | |
45b90328 | 895 | fHistTauLa->Fill(cTauLa); |
45b90328 | 896 | |
889bc324 | 897 | fHistBetheBlochTPCPos->Fill(TMath::Log10(pPos2),posTrack->GetTPCsignal()); |
898 | fHistBetheBlochTPCNeg->Fill(TMath::Log10(pNeg2),negTrack->GetTPCsignal()); | |
45b90328 | 899 | |
45b90328 | 900 | fHistImpactxyN->Fill(nImpactxy); |
901 | fHistImpactzN->Fill(nImpactz); | |
902 | fHistImpactxyP->Fill(pImpactxy); | |
903 | fHistImpactzP->Fill(pImpactz); | |
904 | ||
45b90328 | 905 | fHistImpactxyImpactz->Fill(nImpactxy,nImpactz); |
906 | ||
907 | fHistV0Z->Fill(tV0Position[2]); | |
908 | fHistZ->Fill(tV0Position[2]-tPVPosition[2]); | |
889bc324 | 909 | |
45b90328 | 910 | fHistRZ->Fill(tV0Position[2],radius); |
911 | fHistPtV0Z->Fill(v0->Pt(),tV0Position[2]); | |
912 | ||
913 | fHistPtArm->Fill(v0->AlphaV0(),v0->PtArmV0()); | |
914 | fHistXZ->Fill(tV0Position[2],tV0Position[0]); | |
915 | fHistYZ->Fill(tV0Position[2],tV0Position[1]); | |
45b90328 | 916 | fHistPtV0->Fill(v0->Pt()); |
917 | ||
918 | //effective mass histograms | |
919 | ||
920 | //sets assumed particle type of pos/neg daughters. | |
921 | // 0 = electron, 1 = Muon, 2 = pion, 3 = kaon, 4 = proton. | |
922 | int dPos = 0; | |
923 | int dNeg = 0; | |
924 | ||
925 | // v0->ChangeMassHypothesis(kLambda0); | |
926 | dPos = 4; | |
927 | dNeg = 2; | |
928 | if(v0->GetEffMass(dPos,dNeg) > 1.11 && v0->GetEffMass(dPos,dNeg) < 1.13) | |
929 | { | |
930 | if(!(v0->GetOnFlyStatus())) | |
931 | { | |
932 | nLambda++; | |
933 | } | |
934 | } | |
935 | if(lambdaCandidate) | |
936 | { | |
889bc324 | 937 | fHistMLa->Fill(v0->GetEffMass(dPos,dNeg)); |
45b90328 | 938 | fHistMLaPt->Fill(v0->Pt(),v0->GetEffMass(dPos,dNeg)); |
939 | } | |
940 | ||
941 | // v0->ChangeMassHypothesis(kK0Short); | |
942 | dPos = 2; | |
943 | dNeg = 2; | |
944 | if(kshortCandidate) | |
945 | { | |
946 | fHistMK0->Fill(v0->GetEffMass(dPos,dNeg)); | |
45b90328 | 947 | fHistMK0Pt->Fill(v0->Pt(),v0->GetEffMass(dPos,dNeg)); |
948 | } | |
949 | // v0->ChangeMassHypothesis(kLambda0Bar); | |
950 | dPos = 2; | |
951 | dNeg = 4; | |
952 | if(antilambdaCandidate) | |
953 | { | |
954 | fHistMLb->Fill(v0->GetEffMass(dPos,dNeg)); | |
45b90328 | 955 | fHistMLbPt->Fill(v0->Pt(),v0->GetEffMass(dPos,dNeg)); |
956 | } | |
889bc324 | 957 | |
45b90328 | 958 | } |
959 | ||
45b90328 | 960 | |
961 | fHistPVZ->Fill(tPVPosition[2]); | |
962 | fHistNV0->Fill(nV0s); | |
45b90328 | 963 | fHistNLambda->Fill(nLambda); |
964 | ||
889bc324 | 965 | // NEW HISTO should be filled before this point, as PostData puts the |
45b90328 | 966 | // information for this iteration of the UserExec in the container |
967 | PostData(1, fOutputList); | |
968 | } | |
969 | ||
970 | ||
971 | //________________________________________________________________________ | |
972 | void AliAnalysisTaskLukeV0::Terminate(Option_t *) | |
973 | { | |
974 | // Draw result to screen, or perform fitting, normalizations | |
975 | // Called once at the end of the query | |
976 | ||
977 | fOutputList = dynamic_cast<TList*> (GetOutputData(1)); | |
978 | if(!fOutputList) { Printf("ERROR: could not retrieve TList fOutputList"); return; } | |
979 | ||
980 | } |