First working version
[u/mrichter/AliRoot.git] / PWG0 / AliPhysicsSelection.cxx
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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);
182 Bool_t v0BG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0ABG) || triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0CBG);
61899827 183
296dd262 184 if (fastOR > 0)
185 fHistStatistics->Fill(2, i);
186 if (fastOR > 1)
187 fHistStatistics->Fill(3, i);
188
189 if (v0A)
190 fHistStatistics->Fill(4, i);
191 if (v0C)
192 fHistStatistics->Fill(5, i);
193 if (v0BG)
194 fHistStatistics->Fill(6, i);
195
196 if ((fastOR > 0 || v0A || v0C) && !v0BG)
197 fHistStatistics->Fill(7, i);
198
199 if (fastOR > 0 && (v0A || v0C) && !v0BG)
200 fHistStatistics->Fill(8, i);
201
202 if (v0A && v0C && !v0BG)
203 fHistStatistics->Fill(9, i);
204
205 if (fastOR > 1 || (fastOR > 0 && (v0A || v0C)) || (v0A && v0C))
206 {
207 if (!v0BG)
208 {
209 fHistStatistics->Fill(10, i);
61899827 210
296dd262 211 if (fBackgroundIdentification && !fBackgroundIdentification->IsSelected(const_cast<AliESDEvent*> (aEsd)))
212 {
213 AliDebug(AliLog::kDebug, "Rejecting event because of background identification");
214 fHistStatistics->Fill(11, i);
215 }
216 else
217 {
218 AliDebug(AliLog::kDebug, "Accepted event for histograms");
219
220 fHistStatistics->Fill(12, i);
221 fHistBunchCrossing->Fill(aEsd->GetBunchCrossNumber(), i);
52d4048c 222 if (i < fCollTrigClasses.GetEntries())
296dd262 223 accept = kTRUE;
224 }
225 }
226 else
227 AliDebug(AliLog::kDebug, "Rejecting event because of V0 BG flag");
228 }
229 else
230 AliDebug(AliLog::kDebug, "Rejecting event because trigger condition is not fulfilled");
231 }
232 }
233
234 if (accept)
235 AliDebug(AliLog::kDebug, "Accepted event as collision candidate");
61899827 236
296dd262 237 return accept;
61899827 238}
239
240Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
241{
242 // initializes the object for the given run
243 // 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
244
296dd262 245 if (fCurrentRun != -1)
246 AliFatal("Processing several runs is not supported, yet");
247
61899827 248 AliInfo(Form("Initializing for run %d", runNumber));
296dd262 249 fCurrentRun = runNumber;
61899827 250
296dd262 251 fTriggerAnalysis.Delete();
252 fCollTrigClasses.Delete();
253 fBGTrigClasses.Delete();
61899827 254
296dd262 255 fCollTrigClasses.Add(new TObjString("+CINT1B-ABCE-NOPF-ALL"));
256 fBGTrigClasses.Add(new TObjString("+CINT1A-ABCE-NOPF-ALL"));
257 fBGTrigClasses.Add(new TObjString("+CINT1C-ABCE-NOPF-ALL"));
258 fBGTrigClasses.Add(new TObjString("+CINT1-E-NOPF-ALL"));
61899827 259
296dd262 260 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
261
262 for (Int_t i=0; i<count; i++)
61899827 263 {
296dd262 264 AliTriggerAnalysis* triggerAnalysis = new AliTriggerAnalysis;
265 triggerAnalysis->EnableHistograms();
266 triggerAnalysis->SetSPDGFOThreshhold(1);
267 triggerAnalysis->SetV0TimeOffset(0);
61899827 268
296dd262 269 switch (runNumber)
270 {
271 case 104316:
272 case 104320:
273 case 104321: //OK
274 case 104439:
275 triggerAnalysis->SetV0TimeOffset(7.5);
276 break;
277 }
61899827 278
296dd262 279 fTriggerAnalysis.Add(triggerAnalysis);
61899827 280 }
296dd262 281
282 if (fHistStatistics)
283 delete fHistStatistics;
284
285 fHistStatistics = new TH2F("fHistStatistics", "fHistStatistics;;", 12, 0.5, 12.5, count, -0.5, -0.5 + count);
61899827 286
296dd262 287 Int_t n = 1;
288 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Correct trigger class(es)");
289 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1");
290 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2");
291 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A");
292 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C");
293 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0 BG");
294 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 1 | V0A | VOC) & !V0 BG");
295 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1 & (V0A | VOC) & !V0 BG");
296 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A & VOC & !V0 BG");
297 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 2 | (FO >= 1 & (V0A | VOC)) | (V0A & VOC)) & !V0 BG");
298 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Background identification");
299 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Accepted");
300
301 n = 1;
302 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
303 fHistStatistics->GetYaxis()->SetBinLabel(n++, ((TObjString*) fCollTrigClasses.At(i))->String());
304 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
305 fHistStatistics->GetYaxis()->SetBinLabel(n++, ((TObjString*) fBGTrigClasses.At(i))->String());
61899827 306
307 if (fHistBunchCrossing)
296dd262 308 delete fHistBunchCrossing;
309
310 fHistBunchCrossing = new TH2F("fHistBunchCrossing", "fHistBunchCrossing;bunch crossing number;", 4000, -0.5, 3999.5, count, -0.5, -0.5 + count);
61899827 311
312 return kTRUE;
313}
314
315void AliPhysicsSelection::Print(Option_t* /* option */) const
316{
317 // print the configuration
318
296dd262 319 Printf("Configuration:");
61899827 320
296dd262 321 Printf("Collision trigger classes:");
322 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
323 Printf("%s", ((TObjString*) fCollTrigClasses.At(i))->String().Data());
61899827 324
296dd262 325 Printf("Background trigger classes:");
326 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
327 Printf("%s", ((TObjString*) fBGTrigClasses.At(i))->String().Data());
328
329 AliTriggerAnalysis* triggerAnalysis = dynamic_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(0));
61899827 330
296dd262 331 if (triggerAnalysis)
332 {
333 if (triggerAnalysis->GetV0TimeOffset() > 0)
334 Printf("V0 time offset active: %.2f ns", triggerAnalysis->GetV0TimeOffset());
61899827 335
296dd262 336 Printf("\nTotal available events:");
528640ed 337
296dd262 338 triggerAnalysis->PrintTriggerClasses();
339 }
528640ed 340
296dd262 341 Printf("\nSelection statistics for first collision trigger:");
342
343 Printf("Total events with correct trigger class: %d", (Int_t) fHistStatistics->GetBinContent(1, 1));
344 Printf("Selected collision candidates: %d", (Int_t) fHistStatistics->GetBinContent(12, 1));
61899827 345}
346
347Long64_t AliPhysicsSelection::Merge(TCollection* list)
348{
349 // Merge a list of AliMultiplicityCorrection objects with this (needed for
350 // PROOF).
351 // Returns the number of merged objects (including this).
352
353 if (!list)
354 return 0;
355
356 if (list->IsEmpty())
357 return 1;
358
359 TIterator* iter = list->MakeIterator();
360 TObject* obj;
361
362 // collections of all histograms
363 const Int_t nHists = 9;
364 TList collections[nHists];
365
366 Int_t count = 0;
367 while ((obj = iter->Next())) {
368
369 AliPhysicsSelection* entry = dynamic_cast<AliPhysicsSelection*> (obj);
370 if (entry == 0)
371 continue;
372
373 Int_t n = 0;
296dd262 374 collections[n++].Add(&(entry->fTriggerAnalysis));
61899827 375 collections[n++].Add(entry->fHistStatistics);
376 collections[n++].Add(entry->fHistBunchCrossing);
296dd262 377 if (entry->fBackgroundIdentification)
378 collections[n++].Add(entry->fBackgroundIdentification);
61899827 379
380 count++;
381 }
382
383 Int_t n = 0;
296dd262 384 fTriggerAnalysis.Merge(&collections[n++]);
61899827 385 fHistStatistics->Merge(&collections[n++]);
386 fHistBunchCrossing->Merge(&collections[n++]);
296dd262 387 if (fBackgroundIdentification)
388 fBackgroundIdentification->Merge(&collections[n++]);
61899827 389
390 delete iter;
391
392 return count+1;
393}
394
395void AliPhysicsSelection::SaveHistograms(const char* folder) const
396{
397 // write histograms to current directory
398
399 if (!fHistStatistics)
400 return;
401
402 if (folder)
403 {
404 gDirectory->mkdir(folder);
405 gDirectory->cd(folder);
406 }
407
408 fHistStatistics->Write();
409 fHistBunchCrossing->Write();
410
296dd262 411 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
412 for (Int_t i=0; i < count; i++)
413 {
414 TString triggerClass = "trigger_histograms_";
415 if (i < fCollTrigClasses.GetEntries())
416 triggerClass += ((TObjString*) fCollTrigClasses.At(i))->String();
417 else
418 triggerClass += ((TObjString*) fBGTrigClasses.At(i - fCollTrigClasses.GetEntries()))->String();
61899827 419
296dd262 420 gDirectory->mkdir(triggerClass);
421 gDirectory->cd(triggerClass);
61899827 422
296dd262 423 static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i))->SaveHistograms();
424
425 gDirectory->cd("..");
426 }
427
428 if (fBackgroundIdentification)
429 {
430 gDirectory->mkdir("background_identification");
431 gDirectory->cd("background_identification");
432
433 fBackgroundIdentification->GetOutput()->Write();
434
435 gDirectory->cd("..");
436 }
61899827 437
438 if (folder)
439 gDirectory->cd("..");
440}