1 /* $Id: AliPhysicsSelection.cxx 35782 2009-10-22 11:54:31Z jgrosseo $ */
3 /**************************************************************************
4 * Copyright(c) 1998-2009, ALICE Experiment at CERN, All rights reserved. *
6 * Author: The ALICE Off-line Project. *
7 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //-------------------------------------------------------------------------
19 // Implementation of Class AliPhysicsSelection
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
25 // Create the object and initialize it with the correct run number:
26 // fPhysicsSelection = new AliPhysicsSelection;
27 // fPhysicsSelection->Initialize(104160);
29 // To check if an event is a collision candidate, use:
30 // fPhysicsSelection->IsCollisionCandidate(fESD)
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")
36 // To print statistics after processing use:
37 // fPhysicsSelection->Print();
39 // Origin: Jan Fiete Grosse-Oetringhaus, CERN
40 //-------------------------------------------------------------------------
42 #include <Riostream.h>
46 #include <TIterator.h>
47 #include <TDirectory.h>
48 #include <TObjArray.h>
50 #include <AliPhysicsSelection.h>
52 #include <AliTriggerAnalysis.h>
55 #include <AliESDEvent.h>
57 ClassImp(AliPhysicsSelection)
59 AliPhysicsSelection::AliPhysicsSelection() :
60 AliAnalysisCuts("AliPhysicsSelection", "AliPhysicsSelection"),
65 fBackgroundIdentification(0),
71 fCollTrigClasses.SetOwner(1);
72 fBGTrigClasses.SetOwner(1);
73 fTriggerAnalysis.SetOwner(1);
75 AliLog::SetClassDebugLevel("AliPhysicsSelection", AliLog::kWarning);
78 AliPhysicsSelection::~AliPhysicsSelection()
82 fCollTrigClasses.Delete();
83 fBGTrigClasses.Delete();
84 fTriggerAnalysis.Delete();
88 delete fHistStatistics;
92 if (fHistBunchCrossing)
94 delete fHistBunchCrossing;
95 fHistBunchCrossing = 0;
99 Bool_t AliPhysicsSelection::CheckTriggerClass(const AliESDEvent* aEsd, const char* trigger) const
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
105 TString str(trigger);
106 TObjArray* tokens = str.Tokenize(" ");
108 for (Int_t i=0; i < tokens->GetEntries(); i++)
110 TString str2(((TObjString*) tokens->At(i))->String());
112 if (str2[0] != '+' && str2[0] != '-')
113 AliFatal(Form("Invalid trigger syntax: %s", trigger));
115 Bool_t flag = (str2[0] == '+');
119 if (flag && !aEsd->IsTriggerClassFired(str2))
121 AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is not present", str2.Data()));
125 if (!flag && aEsd->IsTriggerClassFired(str2))
127 AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is present", str2.Data()));
137 Bool_t AliPhysicsSelection::IsCollisionCandidate(const AliESDEvent* aEsd)
139 // checks if the given event is a collision candidate
141 const AliESDHeader* esdHeader = aEsd->GetHeader();
144 AliError("ESD Header could not be retrieved");
148 // check event type (should be PHYSICS = 7)
149 if (esdHeader->GetEventType() != 7)
152 if (fCurrentRun != aEsd->GetRunNumber())
153 if (!Initialize(aEsd->GetRunNumber()))
154 AliFatal(Form("Could not initialize for run %d", aEsd->GetRunNumber()));
156 Bool_t accept = kFALSE;
158 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
159 for (Int_t i=0; i < count; i++)
161 const char* triggerClass = 0;
162 if (i < fCollTrigClasses.GetEntries())
163 triggerClass = ((TObjString*) fCollTrigClasses.At(i))->String();
165 triggerClass = ((TObjString*) fBGTrigClasses.At(i - fCollTrigClasses.GetEntries()))->String();
167 AliDebug(AliLog::kDebug, Form("Processing trigger class %s", triggerClass));
169 AliTriggerAnalysis* triggerAnalysis = static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i));
171 triggerAnalysis->FillTriggerClasses(aEsd);
173 if (CheckTriggerClass(aEsd, triggerClass))
175 triggerAnalysis->FillHistograms(aEsd);
177 fHistStatistics->Fill(1, i);
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 v0ABG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0ABG);
183 Bool_t v0CBG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0CBG);
184 Bool_t v0BG = v0ABG || v0CBG;
187 fHistStatistics->Fill(2, i);
189 fHistStatistics->Fill(3, i);
192 fHistStatistics->Fill(4, i);
194 fHistStatistics->Fill(5, i);
196 fHistStatistics->Fill(6, i);
198 fHistStatistics->Fill(7, i);
200 if (fastOR > 1 && !v0BG)
201 fHistStatistics->Fill(8, i);
203 if ((fastOR > 0 || v0A || v0C) && !v0BG)
204 fHistStatistics->Fill(9, i);
206 if (fastOR > 0 && (v0A || v0C) && !v0BG)
207 fHistStatistics->Fill(10, i);
209 if (v0A && v0C && !v0BG)
210 fHistStatistics->Fill(11, i);
212 if (fastOR > 1 || (fastOR > 0 && (v0A || v0C)) || (v0A && v0C))
216 fHistStatistics->Fill(12, i);
218 if (fBackgroundIdentification && !fBackgroundIdentification->IsSelected(const_cast<AliESDEvent*> (aEsd)))
220 AliDebug(AliLog::kDebug, "Rejecting event because of background identification");
221 fHistStatistics->Fill(13, i);
225 AliDebug(AliLog::kDebug, "Accepted event for histograms");
227 fHistStatistics->Fill(14, i);
228 fHistBunchCrossing->Fill(aEsd->GetBunchCrossNumber(), i);
229 if (i < fCollTrigClasses.GetEntries())
234 AliDebug(AliLog::kDebug, "Rejecting event because of V0 BG flag");
237 AliDebug(AliLog::kDebug, "Rejecting event because trigger condition is not fulfilled");
242 AliDebug(AliLog::kDebug, "Accepted event as collision candidate");
247 Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
249 // initializes the object for the given run
250 // 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
252 Bool_t oldStatus = TH1::AddDirectoryStatus();
253 TH1::AddDirectory(kFALSE);
255 if (fCurrentRun != -1)
256 AliFatal("Processing several runs is not supported, yet");
258 AliInfo(Form("Initializing for run %d", runNumber));
259 fCurrentRun = runNumber;
261 fTriggerAnalysis.Delete();
262 fCollTrigClasses.Delete();
263 fBGTrigClasses.Delete();
265 fCollTrigClasses.Add(new TObjString("+CINT1B-ABCE-NOPF-ALL"));
266 fBGTrigClasses.Add(new TObjString("+CINT1A-ABCE-NOPF-ALL"));
267 fBGTrigClasses.Add(new TObjString("+CINT1C-ABCE-NOPF-ALL"));
268 fBGTrigClasses.Add(new TObjString("+CINT1-E-NOPF-ALL"));
270 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
272 for (Int_t i=0; i<count; i++)
274 AliTriggerAnalysis* triggerAnalysis = new AliTriggerAnalysis;
275 triggerAnalysis->EnableHistograms();
276 triggerAnalysis->SetSPDGFOThreshhold(1);
277 triggerAnalysis->SetV0TimeOffset(0);
285 triggerAnalysis->SetV0TimeOffset(7.5);
289 fTriggerAnalysis.Add(triggerAnalysis);
293 delete fHistStatistics;
295 fHistStatistics = new TH2F("fHistStatistics", "fHistStatistics;;", 14, 0.5, 14.5, count, -0.5, -0.5 + count);
298 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Triggered");
299 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1");
300 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2");
301 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A");
302 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C");
303 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A BG");
304 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C BG");
305 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2 &!V0 BG");
306 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 1 | V0A | V0C) & !V0 BG");
307 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1 & (V0A | V0C) & !V0 BG");
308 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A & V0C & !V0 BG");
309 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 2 | (FO >= 1 & (V0A | V0C)) | (V0A & V0C)) & !V0 BG");
310 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Background identification");
311 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Accepted");
313 if (fHistBunchCrossing)
314 delete fHistBunchCrossing;
316 fHistBunchCrossing = new TH2F("fHistBunchCrossing", "fHistBunchCrossing;bunch crossing number;", 4000, -0.5, 3999.5, count, -0.5, -0.5 + count);
319 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
321 fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
322 fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
325 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
327 fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
328 fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
332 TH1::AddDirectory(oldStatus);
337 void AliPhysicsSelection::Print(Option_t* /* option */) const
339 // print the configuration
341 Printf("Configuration initialized for run %d:", fCurrentRun);
343 Printf("Collision trigger classes:");
344 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
345 Printf("%s", ((TObjString*) fCollTrigClasses.At(i))->String().Data());
347 Printf("Background trigger classes:");
348 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
349 Printf("%s", ((TObjString*) fBGTrigClasses.At(i))->String().Data());
351 AliTriggerAnalysis* triggerAnalysis = dynamic_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(0));
355 if (triggerAnalysis->GetV0TimeOffset() > 0)
356 Printf("V0 time offset active: %.2f ns", triggerAnalysis->GetV0TimeOffset());
358 Printf("\nTotal available events:");
360 triggerAnalysis->PrintTriggerClasses();
365 Printf("\nSelection statistics for first collision trigger:");
367 Printf("Total events with correct trigger class: %d", (Int_t) fHistStatistics->GetBinContent(1, 1));
368 Printf("Selected collision candidates: %d", (Int_t) fHistStatistics->GetBinContent(fHistStatistics->GetXaxis()->FindBin("Accepted"), 1));
371 if (fHistBunchCrossing)
373 Printf("\nBunch crossing statistics:");
375 for (Int_t i=1; i<=fHistBunchCrossing->GetNbinsY(); i++)
378 str.Form("Trigger %s has accepted events in the bunch crossings: ", fHistBunchCrossing->GetYaxis()->GetBinLabel(i));
380 for (Int_t j=1; j<=fHistBunchCrossing->GetNbinsX(); j++)
381 if (fHistBunchCrossing->GetBinContent(j, i) > 0)
382 str += Form("%d, ", (Int_t) fHistBunchCrossing->GetXaxis()->GetBinCenter(j));
384 Printf("%s", str.Data());
387 for (Int_t j=1; j<=fHistBunchCrossing->GetNbinsX(); j++)
390 for (Int_t i=1; i<=fHistBunchCrossing->GetNbinsY(); i++)
392 if (fHistBunchCrossing->GetBinContent(j, i) > 0)
396 Printf("WARNING: Bunch crossing %d has more than one trigger class active. Check BPTX functioning for this run!", (Int_t) fHistBunchCrossing->GetXaxis()->GetBinCenter(j));
401 Long64_t AliPhysicsSelection::Merge(TCollection* list)
403 // Merge a list of AliMultiplicityCorrection objects with this (needed for
405 // Returns the number of merged objects (including this).
413 TIterator* iter = list->MakeIterator();
416 // collections of all histograms
417 const Int_t nHists = 9;
418 TList collections[nHists];
421 while ((obj = iter->Next())) {
423 AliPhysicsSelection* entry = dynamic_cast<AliPhysicsSelection*> (obj);
427 collections[0].Add(&(entry->fTriggerAnalysis));
428 if (entry->fHistStatistics)
429 collections[1].Add(entry->fHistStatistics);
430 if (entry->fHistBunchCrossing)
431 collections[2].Add(entry->fHistBunchCrossing);
432 if (entry->fBackgroundIdentification)
433 collections[3].Add(entry->fBackgroundIdentification);
438 fTriggerAnalysis.Merge(&collections[0]);
440 fHistStatistics->Merge(&collections[1]);
441 if (fHistBunchCrossing)
442 fHistBunchCrossing->Merge(&collections[2]);
443 if (fBackgroundIdentification)
444 fBackgroundIdentification->Merge(&collections[3]);
451 void AliPhysicsSelection::SaveHistograms(const char* folder) const
453 // write histograms to current directory
455 if (!fHistStatistics)
460 gDirectory->mkdir(folder);
461 gDirectory->cd(folder);
464 fHistStatistics->Write();
465 fHistBunchCrossing->Write();
467 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
468 for (Int_t i=0; i < count; i++)
470 TString triggerClass = "trigger_histograms_";
471 if (i < fCollTrigClasses.GetEntries())
472 triggerClass += ((TObjString*) fCollTrigClasses.At(i))->String();
474 triggerClass += ((TObjString*) fBGTrigClasses.At(i - fCollTrigClasses.GetEntries()))->String();
476 gDirectory->mkdir(triggerClass);
477 gDirectory->cd(triggerClass);
479 static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i))->SaveHistograms();
481 gDirectory->cd("..");
484 if (fBackgroundIdentification)
486 gDirectory->mkdir("background_identification");
487 gDirectory->cd("background_identification");
489 fBackgroundIdentification->GetOutput()->Write();
491 gDirectory->cd("..");
495 gDirectory->cd("..");