added separate histogram entry for V0A and C BG flag
[u/mrichter/AliRoot.git] / PWG0 / AliPhysicsSelection.cxx
CommitLineData
61899827 1/* $Id: AliPhysicsSelection.cxx 35782 2009-10-22 11:54:31Z jgrosseo $ */
2
3/**************************************************************************
4 * Copyright(c) 1998-2009, ALICE Experiment at CERN, All rights reserved. *
5 * *
6 * Author: The ALICE Off-line Project. *
7 * Contributors are mentioned in the code where appropriate. *
8 * *
9 * Permission to use, copy, modify and distribute this software and its *
10 * documentation strictly for non-commercial purposes is hereby granted *
11 * without fee, provided that the above copyright notice appears in all *
12 * copies and that both the copyright notice and this permission notice *
13 * appear in the supporting documentation. The authors make no claims *
14 * about the suitability of this software for any purpose. It is *
15 * provided "as is" without express or implied warranty. *
16 **************************************************************************/
17
18//-------------------------------------------------------------------------
19// Implementation of Class AliPhysicsSelection
528640ed 20// This class selects collision candidates from data runs, applying selection cuts on triggers
21// and background rejection based on the content of the ESD
22//
23// Usage:
24//
25// Create the object and initialize it with the correct run number:
26// fPhysicsSelection = new AliPhysicsSelection;
27// fPhysicsSelection->Initialize(104160);
28//
29// To check if an event is a collision candidate, use:
30// fPhysicsSelection->IsCollisionCandidate(fESD)
31//
32// After processing save the resulting histograms to a file with (a folder physics_selection
33// will be created that contains the histograms):
34// fPhysicsSelection->SaveHistograms("physics_selection")
35//
36// To print statistics after processing use:
37// fPhysicsSelection->Print();
38//
61899827 39// Origin: Jan Fiete Grosse-Oetringhaus, CERN
40//-------------------------------------------------------------------------
41
42#include <Riostream.h>
43#include <TH1F.h>
44#include <TH2F.h>
45#include <TList.h>
46#include <TIterator.h>
47#include <TDirectory.h>
296dd262 48#include <TObjArray.h>
61899827 49
50#include <AliPhysicsSelection.h>
51
52#include <AliTriggerAnalysis.h>
53#include <AliLog.h>
54
55#include <AliESDEvent.h>
56
57ClassImp(AliPhysicsSelection)
58
59AliPhysicsSelection::AliPhysicsSelection() :
296dd262 60 AliAnalysisCuts("AliPhysicsSelection", "AliPhysicsSelection"),
61 fCurrentRun(-1),
62 fCollTrigClasses(),
63 fBGTrigClasses(),
64 fTriggerAnalysis(),
65 fBackgroundIdentification(0),
61899827 66 fHistStatistics(0),
67 fHistBunchCrossing(0)
68{
69 // constructor
70
296dd262 71 fCollTrigClasses.SetOwner(1);
72 fBGTrigClasses.SetOwner(1);
73 fTriggerAnalysis.SetOwner(1);
74
61899827 75 AliLog::SetClassDebugLevel("AliPhysicsSelection", AliLog::kWarning);
76}
77
78AliPhysicsSelection::~AliPhysicsSelection()
79{
80 // destructor
81
296dd262 82 fCollTrigClasses.Delete();
83 fBGTrigClasses.Delete();
84 fTriggerAnalysis.Delete();
61899827 85
86 if (fHistStatistics)
87 {
88 delete fHistStatistics;
89 fHistStatistics = 0;
90 }
91
92 if (fHistBunchCrossing)
93 {
94 delete fHistBunchCrossing;
95 fHistBunchCrossing = 0;
96 }
97}
296dd262 98
99Bool_t AliPhysicsSelection::CheckTriggerClass(const AliESDEvent* aEsd, const char* trigger) const
100{
101 // checks if the given trigger class(es) are found for the current event
102 // format of trigger: +TRIGGER1 -TRIGGER2
103 // requires TRIGGER1 and rejects TRIGGER2
104
105 TString str(trigger);
106 TObjArray* tokens = str.Tokenize(" ");
107
108 for (Int_t i=0; i < tokens->GetEntries(); i++)
109 {
110 TString str2(((TObjString*) tokens->At(i))->String());
111
112 if (str2[0] != '+' && str2[0] != '-')
113 AliFatal(Form("Invalid trigger syntax: %s", trigger));
114
115 Bool_t flag = (str2[0] == '+');
116
117 str2.Remove(0, 1);
118
119 if (flag && !aEsd->IsTriggerClassFired(str2))
120 {
121 AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is not present", str2.Data()));
122 delete tokens;
123 return kFALSE;
124 }
125 if (!flag && aEsd->IsTriggerClassFired(str2))
126 {
127 AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is present", str2.Data()));
128 delete tokens;
129 return kFALSE;
130 }
131 }
132
133 delete tokens;
134 return kTRUE;
135}
61899827 136
137Bool_t AliPhysicsSelection::IsCollisionCandidate(const AliESDEvent* aEsd)
138{
139 // checks if the given event is a collision candidate
140
61899827 141 const AliESDHeader* esdHeader = aEsd->GetHeader();
142 if (!esdHeader)
143 {
144 AliError("ESD Header could not be retrieved");
145 return kFALSE;
146 }
147
148 // check event type (should be PHYSICS = 7)
149 if (esdHeader->GetEventType() != 7)
150 return kFALSE;
61899827 151
296dd262 152 if (fCurrentRun != aEsd->GetRunNumber())
153 if (!Initialize(aEsd->GetRunNumber()))
154 AliFatal(Form("Could not initialize for run %d", aEsd->GetRunNumber()));
155
156 Bool_t accept = kFALSE;
157
158 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
159 for (Int_t i=0; i < count; i++)
61899827 160 {
296dd262 161 const char* triggerClass = 0;
162 if (i < fCollTrigClasses.GetEntries())
163 triggerClass = ((TObjString*) fCollTrigClasses.At(i))->String();
164 else
165 triggerClass = ((TObjString*) fBGTrigClasses.At(i - fCollTrigClasses.GetEntries()))->String();
61899827 166
296dd262 167 AliDebug(AliLog::kDebug, Form("Processing trigger class %s", triggerClass));
61899827 168
296dd262 169 AliTriggerAnalysis* triggerAnalysis = static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i));
61899827 170
296dd262 171 triggerAnalysis->FillTriggerClasses(aEsd);
61899827 172
296dd262 173 if (CheckTriggerClass(aEsd, triggerClass))
174 {
175 triggerAnalysis->FillHistograms(aEsd);
176
177 fHistStatistics->Fill(1, i);
61899827 178
296dd262 179 Int_t fastOR = triggerAnalysis->SPDFiredChips(aEsd, 0);
180 Bool_t v0A = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0A);
181 Bool_t v0C = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0C);
f4ca8f20 182 Bool_t v0ABG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0ABG);
183 Bool_t v0CBG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0CBG);
184 Bool_t v0BG = v0ABG || v0CBG;
61899827 185
296dd262 186 if (fastOR > 0)
187 fHistStatistics->Fill(2, i);
188 if (fastOR > 1)
189 fHistStatistics->Fill(3, i);
190
191 if (v0A)
192 fHistStatistics->Fill(4, i);
193 if (v0C)
194 fHistStatistics->Fill(5, i);
f4ca8f20 195 if (v0ABG)
296dd262 196 fHistStatistics->Fill(6, i);
f4ca8f20 197 if (v0CBG)
198 fHistStatistics->Fill(7, i);
296dd262 199
200 if ((fastOR > 0 || v0A || v0C) && !v0BG)
f4ca8f20 201 fHistStatistics->Fill(8, i);
296dd262 202
203 if (fastOR > 0 && (v0A || v0C) && !v0BG)
f4ca8f20 204 fHistStatistics->Fill(9, i);
296dd262 205
206 if (v0A && v0C && !v0BG)
f4ca8f20 207 fHistStatistics->Fill(10, i);
296dd262 208
209 if (fastOR > 1 || (fastOR > 0 && (v0A || v0C)) || (v0A && v0C))
210 {
211 if (!v0BG)
212 {
f4ca8f20 213 fHistStatistics->Fill(11, i);
61899827 214
296dd262 215 if (fBackgroundIdentification && !fBackgroundIdentification->IsSelected(const_cast<AliESDEvent*> (aEsd)))
216 {
217 AliDebug(AliLog::kDebug, "Rejecting event because of background identification");
f4ca8f20 218 fHistStatistics->Fill(12, i);
296dd262 219 }
220 else
221 {
222 AliDebug(AliLog::kDebug, "Accepted event for histograms");
223
f4ca8f20 224 fHistStatistics->Fill(13, i);
296dd262 225 fHistBunchCrossing->Fill(aEsd->GetBunchCrossNumber(), i);
52d4048c 226 if (i < fCollTrigClasses.GetEntries())
296dd262 227 accept = kTRUE;
228 }
229 }
230 else
231 AliDebug(AliLog::kDebug, "Rejecting event because of V0 BG flag");
232 }
233 else
234 AliDebug(AliLog::kDebug, "Rejecting event because trigger condition is not fulfilled");
235 }
236 }
237
238 if (accept)
239 AliDebug(AliLog::kDebug, "Accepted event as collision candidate");
61899827 240
296dd262 241 return accept;
61899827 242}
243
244Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
245{
246 // initializes the object for the given run
247 // TODO having the run number here and parameters hardcoded is clearly temporary, a way needs to be found to have a CDB-like configuration also for analysis
248
296dd262 249 if (fCurrentRun != -1)
250 AliFatal("Processing several runs is not supported, yet");
251
61899827 252 AliInfo(Form("Initializing for run %d", runNumber));
296dd262 253 fCurrentRun = runNumber;
61899827 254
296dd262 255 fTriggerAnalysis.Delete();
256 fCollTrigClasses.Delete();
257 fBGTrigClasses.Delete();
61899827 258
296dd262 259 fCollTrigClasses.Add(new TObjString("+CINT1B-ABCE-NOPF-ALL"));
260 fBGTrigClasses.Add(new TObjString("+CINT1A-ABCE-NOPF-ALL"));
261 fBGTrigClasses.Add(new TObjString("+CINT1C-ABCE-NOPF-ALL"));
262 fBGTrigClasses.Add(new TObjString("+CINT1-E-NOPF-ALL"));
61899827 263
296dd262 264 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
265
266 for (Int_t i=0; i<count; i++)
61899827 267 {
296dd262 268 AliTriggerAnalysis* triggerAnalysis = new AliTriggerAnalysis;
269 triggerAnalysis->EnableHistograms();
270 triggerAnalysis->SetSPDGFOThreshhold(1);
271 triggerAnalysis->SetV0TimeOffset(0);
61899827 272
296dd262 273 switch (runNumber)
274 {
275 case 104316:
276 case 104320:
277 case 104321: //OK
278 case 104439:
279 triggerAnalysis->SetV0TimeOffset(7.5);
280 break;
281 }
61899827 282
296dd262 283 fTriggerAnalysis.Add(triggerAnalysis);
61899827 284 }
296dd262 285
286 if (fHistStatistics)
287 delete fHistStatistics;
288
f4ca8f20 289 fHistStatistics = new TH2F("fHistStatistics", "fHistStatistics;;", 13, 0.5, 13.5, count, -0.5, -0.5 + count);
61899827 290
296dd262 291 Int_t n = 1;
292 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Correct trigger class(es)");
293 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1");
294 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2");
295 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A");
296 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C");
f4ca8f20 297 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A BG");
298 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C BG");
296dd262 299 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 1 | V0A | VOC) & !V0 BG");
300 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1 & (V0A | VOC) & !V0 BG");
301 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A & VOC & !V0 BG");
302 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 2 | (FO >= 1 & (V0A | VOC)) | (V0A & VOC)) & !V0 BG");
303 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Background identification");
304 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Accepted");
305
61899827 306 if (fHistBunchCrossing)
296dd262 307 delete fHistBunchCrossing;
308
309 fHistBunchCrossing = new TH2F("fHistBunchCrossing", "fHistBunchCrossing;bunch crossing number;", 4000, -0.5, 3999.5, count, -0.5, -0.5 + count);
61899827 310
f4ca8f20 311 n = 1;
312 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
313 {
314 fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
315 fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
316 n++;
317 }
318 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
319 {
320 fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
321 fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
322 n++;
323 }
324
61899827 325 return kTRUE;
326}
327
328void AliPhysicsSelection::Print(Option_t* /* option */) const
329{
330 // print the configuration
331
b43e01ed 332 Printf("Configuration initialized for run %d:", fCurrentRun);
61899827 333
296dd262 334 Printf("Collision trigger classes:");
335 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
336 Printf("%s", ((TObjString*) fCollTrigClasses.At(i))->String().Data());
61899827 337
296dd262 338 Printf("Background trigger classes:");
339 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
340 Printf("%s", ((TObjString*) fBGTrigClasses.At(i))->String().Data());
341
342 AliTriggerAnalysis* triggerAnalysis = dynamic_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(0));
61899827 343
296dd262 344 if (triggerAnalysis)
345 {
346 if (triggerAnalysis->GetV0TimeOffset() > 0)
347 Printf("V0 time offset active: %.2f ns", triggerAnalysis->GetV0TimeOffset());
61899827 348
296dd262 349 Printf("\nTotal available events:");
528640ed 350
296dd262 351 triggerAnalysis->PrintTriggerClasses();
352 }
528640ed 353
b43e01ed 354 if (fHistStatistics)
355 {
356 Printf("\nSelection statistics for first collision trigger:");
357
358 Printf("Total events with correct trigger class: %d", (Int_t) fHistStatistics->GetBinContent(1, 1));
f4ca8f20 359 Printf("Selected collision candidates: %d", (Int_t) fHistStatistics->GetBinContent(13, 1));
b43e01ed 360 }
61899827 361}
362
363Long64_t AliPhysicsSelection::Merge(TCollection* list)
364{
365 // Merge a list of AliMultiplicityCorrection objects with this (needed for
366 // PROOF).
367 // Returns the number of merged objects (including this).
368
369 if (!list)
370 return 0;
371
372 if (list->IsEmpty())
373 return 1;
374
375 TIterator* iter = list->MakeIterator();
376 TObject* obj;
377
378 // collections of all histograms
379 const Int_t nHists = 9;
380 TList collections[nHists];
381
382 Int_t count = 0;
383 while ((obj = iter->Next())) {
384
385 AliPhysicsSelection* entry = dynamic_cast<AliPhysicsSelection*> (obj);
386 if (entry == 0)
387 continue;
388
389 Int_t n = 0;
296dd262 390 collections[n++].Add(&(entry->fTriggerAnalysis));
61899827 391 collections[n++].Add(entry->fHistStatistics);
392 collections[n++].Add(entry->fHistBunchCrossing);
296dd262 393 if (entry->fBackgroundIdentification)
394 collections[n++].Add(entry->fBackgroundIdentification);
61899827 395
396 count++;
397 }
398
399 Int_t n = 0;
296dd262 400 fTriggerAnalysis.Merge(&collections[n++]);
61899827 401 fHistStatistics->Merge(&collections[n++]);
402 fHistBunchCrossing->Merge(&collections[n++]);
296dd262 403 if (fBackgroundIdentification)
404 fBackgroundIdentification->Merge(&collections[n++]);
61899827 405
406 delete iter;
407
408 return count+1;
409}
410
411void AliPhysicsSelection::SaveHistograms(const char* folder) const
412{
413 // write histograms to current directory
414
415 if (!fHistStatistics)
416 return;
417
418 if (folder)
419 {
420 gDirectory->mkdir(folder);
421 gDirectory->cd(folder);
422 }
423
424 fHistStatistics->Write();
425 fHistBunchCrossing->Write();
426
296dd262 427 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
428 for (Int_t i=0; i < count; i++)
429 {
430 TString triggerClass = "trigger_histograms_";
431 if (i < fCollTrigClasses.GetEntries())
432 triggerClass += ((TObjString*) fCollTrigClasses.At(i))->String();
433 else
434 triggerClass += ((TObjString*) fBGTrigClasses.At(i - fCollTrigClasses.GetEntries()))->String();
61899827 435
296dd262 436 gDirectory->mkdir(triggerClass);
437 gDirectory->cd(triggerClass);
61899827 438
296dd262 439 static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i))->SaveHistograms();
440
441 gDirectory->cd("..");
442 }
443
444 if (fBackgroundIdentification)
445 {
446 gDirectory->mkdir("background_identification");
447 gDirectory->cd("background_identification");
448
449 fBackgroundIdentification->GetOutput()->Write();
450
451 gDirectory->cd("..");
452 }
61899827 453
454 if (folder)
455 gDirectory->cd("..");
456}