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
26 // fPhysicsSelection = new AliPhysicsSelection;
29 // fPhysicsSelection->SetAnalyzeMC()
31 // To check if an event is a collision candidate, use:
32 // fPhysicsSelection->IsCollisionCandidate(fESD)
34 // After processing save the resulting histograms to a file with (a folder physics_selection
35 // will be created that contains the histograms):
36 // fPhysicsSelection->SaveHistograms("physics_selection")
38 // To print statistics after processing use:
39 // fPhysicsSelection->Print();
41 // Origin: Jan Fiete Grosse-Oetringhaus, CERN
42 //-------------------------------------------------------------------------
44 #include <Riostream.h>
48 #include <TIterator.h>
49 #include <TDirectory.h>
50 #include <TObjArray.h>
52 #include <AliPhysicsSelection.h>
54 #include <AliTriggerAnalysis.h>
57 #include <AliESDEvent.h>
59 ClassImp(AliPhysicsSelection)
61 AliPhysicsSelection::AliPhysicsSelection() :
62 AliAnalysisCuts("AliPhysicsSelection", "AliPhysicsSelection"),
68 fBackgroundIdentification(0),
74 fCollTrigClasses.SetOwner(1);
75 fBGTrigClasses.SetOwner(1);
76 fTriggerAnalysis.SetOwner(1);
78 AliLog::SetClassDebugLevel("AliPhysicsSelection", AliLog::kWarning);
81 AliPhysicsSelection::~AliPhysicsSelection()
85 fCollTrigClasses.Delete();
86 fBGTrigClasses.Delete();
87 fTriggerAnalysis.Delete();
91 delete fHistStatistics;
95 if (fHistBunchCrossing)
97 delete fHistBunchCrossing;
98 fHistBunchCrossing = 0;
102 Bool_t AliPhysicsSelection::CheckTriggerClass(const AliESDEvent* aEsd, const char* trigger) const
104 // checks if the given trigger class(es) are found for the current event
105 // format of trigger: +TRIGGER1 -TRIGGER2
106 // requires TRIGGER1 and rejects TRIGGER2
108 TString str(trigger);
109 TObjArray* tokens = str.Tokenize(" ");
111 for (Int_t i=0; i < tokens->GetEntries(); i++)
113 TString str2(((TObjString*) tokens->At(i))->String());
115 if (str2[0] != '+' && str2[0] != '-')
116 AliFatal(Form("Invalid trigger syntax: %s", trigger));
118 Bool_t flag = (str2[0] == '+');
122 if (flag && !aEsd->IsTriggerClassFired(str2))
124 AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is not present", str2.Data()));
128 if (!flag && aEsd->IsTriggerClassFired(str2))
130 AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is present", str2.Data()));
140 Bool_t AliPhysicsSelection::IsCollisionCandidate(const AliESDEvent* aEsd)
142 // checks if the given event is a collision candidate
144 const AliESDHeader* esdHeader = aEsd->GetHeader();
147 AliError("ESD Header could not be retrieved");
151 // check event type; should be PHYSICS = 7 for data and 0 for MC
154 if (esdHeader->GetEventType() != 7)
159 if (esdHeader->GetEventType() != 0)
160 AliFatal(Form("Invalid event type for MC: %d", esdHeader->GetEventType()));
163 if (fCurrentRun != aEsd->GetRunNumber())
164 if (!Initialize(aEsd->GetRunNumber()))
165 AliFatal(Form("Could not initialize for run %d", aEsd->GetRunNumber()));
167 Bool_t accept = kFALSE;
169 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
170 for (Int_t i=0; i < count; i++)
172 const char* triggerClass = 0;
173 if (i < fCollTrigClasses.GetEntries())
174 triggerClass = ((TObjString*) fCollTrigClasses.At(i))->String();
176 triggerClass = ((TObjString*) fBGTrigClasses.At(i - fCollTrigClasses.GetEntries()))->String();
178 AliDebug(AliLog::kDebug, Form("Processing trigger class %s", triggerClass));
180 AliTriggerAnalysis* triggerAnalysis = static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i));
182 triggerAnalysis->FillTriggerClasses(aEsd);
184 if (CheckTriggerClass(aEsd, triggerClass))
186 triggerAnalysis->FillHistograms(aEsd);
188 fHistStatistics->Fill(1, i);
190 Int_t fastOR = triggerAnalysis->SPDFiredChips(aEsd, 0);
191 Bool_t v0A = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0A);
192 Bool_t v0C = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0C);
193 Bool_t v0ABG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0ABG);
194 Bool_t v0CBG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0CBG);
195 Bool_t v0BG = v0ABG || v0CBG;
198 fHistStatistics->Fill(2, i);
200 fHistStatistics->Fill(3, i);
203 fHistStatistics->Fill(4, i);
205 fHistStatistics->Fill(5, i);
207 fHistStatistics->Fill(6, i);
209 fHistStatistics->Fill(7, i);
211 if (fastOR > 1 && !v0BG)
212 fHistStatistics->Fill(8, i);
214 if ((fastOR > 0 || v0A || v0C) && !v0BG)
215 fHistStatistics->Fill(9, i);
217 if (fastOR > 0 && (v0A || v0C) && !v0BG)
218 fHistStatistics->Fill(10, i);
220 if (v0A && v0C && !v0BG)
221 fHistStatistics->Fill(11, i);
223 if (fastOR > 1 || (fastOR > 0 && (v0A || v0C)) || (v0A && v0C))
227 fHistStatistics->Fill(12, i);
229 if (fBackgroundIdentification && !fBackgroundIdentification->IsSelected(const_cast<AliESDEvent*> (aEsd)))
231 AliDebug(AliLog::kDebug, "Rejecting event because of background identification");
232 fHistStatistics->Fill(13, i);
236 AliDebug(AliLog::kDebug, "Accepted event for histograms");
238 fHistStatistics->Fill(14, i);
239 fHistBunchCrossing->Fill(aEsd->GetBunchCrossNumber(), i);
240 if (i < fCollTrigClasses.GetEntries())
245 AliDebug(AliLog::kDebug, "Rejecting event because of V0 BG flag");
248 AliDebug(AliLog::kDebug, "Rejecting event because trigger condition is not fulfilled");
253 AliDebug(AliLog::kDebug, "Accepted event as collision candidate");
258 Int_t AliPhysicsSelection::GetTriggerScheme(UInt_t /* runNumber */)
260 // returns the current trigger scheme (classes that are accepted/rejected)
265 // TODO dependent on run number
269 Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
271 // initializes the object for the given run
272 // 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
274 Bool_t oldStatus = TH1::AddDirectoryStatus();
275 TH1::AddDirectory(kFALSE);
277 Int_t triggerScheme = GetTriggerScheme(runNumber);
279 if (fCurrentRun != -1 && triggerScheme != GetTriggerScheme(fCurrentRun))
280 AliFatal("Processing several runs with different trigger schemes is not supported");
282 AliInfo(Form("Initializing for run %d", runNumber));
284 Bool_t firstTime = kFALSE;
285 if (fCurrentRun == -1)
287 // initialize first time
288 fCurrentRun = runNumber;
294 switch (triggerScheme)
297 fCollTrigClasses.Add(new TObjString(""));
301 fCollTrigClasses.Add(new TObjString("+CINT1B-ABCE-NOPF-ALL"));
302 fBGTrigClasses.Add(new TObjString("+CINT1A-ABCE-NOPF-ALL"));
303 fBGTrigClasses.Add(new TObjString("+CINT1C-ABCE-NOPF-ALL"));
304 fBGTrigClasses.Add(new TObjString("+CINT1-E-NOPF-ALL"));
308 AliFatal(Form("Unsupported trigger scheme %d", triggerScheme));
311 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
313 for (Int_t i=0; i<count; i++)
315 AliTriggerAnalysis* triggerAnalysis = new AliTriggerAnalysis;
316 triggerAnalysis->SetAnalyzeMC(fMC);
317 triggerAnalysis->EnableHistograms();
318 triggerAnalysis->SetSPDGFOThreshhold(1);
319 fTriggerAnalysis.Add(triggerAnalysis);
323 delete fHistStatistics;
325 fHistStatistics = new TH2F("fHistStatistics", "fHistStatistics;;", 14, 0.5, 14.5, count, -0.5, -0.5 + count);
328 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Triggered");
329 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1");
330 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2");
331 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A");
332 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C");
333 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A BG");
334 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C BG");
335 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2 &!V0 BG");
336 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 1 | V0A | V0C) & !V0 BG");
337 fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1 & (V0A | V0C) & !V0 BG");
338 fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A & V0C & !V0 BG");
339 fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 2 | (FO >= 1 & (V0A | V0C)) | (V0A & V0C)) & !V0 BG");
340 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Background identification");
341 fHistStatistics->GetXaxis()->SetBinLabel(n++, "Accepted");
343 if (fHistBunchCrossing)
344 delete fHistBunchCrossing;
346 fHistBunchCrossing = new TH2F("fHistBunchCrossing", "fHistBunchCrossing;bunch crossing number;", 4000, -0.5, 3999.5, count, -0.5, -0.5 + count);
349 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
351 fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
352 fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
355 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
357 fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
358 fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
363 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
364 for (Int_t i=0; i<count; i++)
366 AliTriggerAnalysis* triggerAnalysis = static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i));
375 triggerAnalysis->SetV0TimeOffset(7.5);
378 triggerAnalysis->SetV0TimeOffset(0);
382 TH1::AddDirectory(oldStatus);
387 void AliPhysicsSelection::Print(Option_t* /* option */) const
389 // print the configuration
391 Printf("Configuration initialized for run %d (MC: %d):", fCurrentRun, fMC);
393 Printf("Collision trigger classes:");
394 for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
395 Printf("%s", ((TObjString*) fCollTrigClasses.At(i))->String().Data());
397 Printf("Background trigger classes:");
398 for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
399 Printf("%s", ((TObjString*) fBGTrigClasses.At(i))->String().Data());
401 AliTriggerAnalysis* triggerAnalysis = dynamic_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(0));
405 if (triggerAnalysis->GetV0TimeOffset() > 0)
406 Printf("V0 time offset active: %.2f ns", triggerAnalysis->GetV0TimeOffset());
408 Printf("\nTotal available events:");
410 triggerAnalysis->PrintTriggerClasses();
415 Printf("\nSelection statistics for first collision trigger:");
417 Printf("Total events with correct trigger class: %d", (Int_t) fHistStatistics->GetBinContent(1, 1));
418 Printf("Selected collision candidates: %d", (Int_t) fHistStatistics->GetBinContent(fHistStatistics->GetXaxis()->FindBin("Accepted"), 1));
421 if (fHistBunchCrossing)
423 Printf("\nBunch crossing statistics:");
425 for (Int_t i=1; i<=fHistBunchCrossing->GetNbinsY(); i++)
428 str.Form("Trigger %s has accepted events in the bunch crossings: ", fHistBunchCrossing->GetYaxis()->GetBinLabel(i));
430 for (Int_t j=1; j<=fHistBunchCrossing->GetNbinsX(); j++)
431 if (fHistBunchCrossing->GetBinContent(j, i) > 0)
432 str += Form("%d, ", (Int_t) fHistBunchCrossing->GetXaxis()->GetBinCenter(j));
434 Printf("%s", str.Data());
437 for (Int_t j=1; j<=fHistBunchCrossing->GetNbinsX(); j++)
440 for (Int_t i=1; i<=fHistBunchCrossing->GetNbinsY(); i++)
442 if (fHistBunchCrossing->GetBinContent(j, i) > 0)
446 Printf("WARNING: Bunch crossing %d has more than one trigger class active. Check BPTX functioning for this run!", (Int_t) fHistBunchCrossing->GetXaxis()->GetBinCenter(j));
451 Long64_t AliPhysicsSelection::Merge(TCollection* list)
453 // Merge a list of AliMultiplicityCorrection objects with this (needed for
455 // Returns the number of merged objects (including this).
463 TIterator* iter = list->MakeIterator();
466 // collections of all histograms
467 const Int_t nHists = 9;
468 TList collections[nHists];
471 while ((obj = iter->Next())) {
473 AliPhysicsSelection* entry = dynamic_cast<AliPhysicsSelection*> (obj);
477 collections[0].Add(&(entry->fTriggerAnalysis));
478 if (entry->fHistStatistics)
479 collections[1].Add(entry->fHistStatistics);
480 if (entry->fHistBunchCrossing)
481 collections[2].Add(entry->fHistBunchCrossing);
482 if (entry->fBackgroundIdentification)
483 collections[3].Add(entry->fBackgroundIdentification);
488 fTriggerAnalysis.Merge(&collections[0]);
490 fHistStatistics->Merge(&collections[1]);
491 if (fHistBunchCrossing)
492 fHistBunchCrossing->Merge(&collections[2]);
493 if (fBackgroundIdentification)
494 fBackgroundIdentification->Merge(&collections[3]);
501 void AliPhysicsSelection::SaveHistograms(const char* folder) const
503 // write histograms to current directory
505 if (!fHistStatistics)
510 gDirectory->mkdir(folder);
511 gDirectory->cd(folder);
514 fHistStatistics->Write();
515 fHistBunchCrossing->Write();
517 Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
518 for (Int_t i=0; i < count; i++)
520 TString triggerClass = "trigger_histograms_";
521 if (i < fCollTrigClasses.GetEntries())
522 triggerClass += ((TObjString*) fCollTrigClasses.At(i))->String();
524 triggerClass += ((TObjString*) fBGTrigClasses.At(i - fCollTrigClasses.GetEntries()))->String();
526 gDirectory->mkdir(triggerClass);
527 gDirectory->cd(triggerClass);
529 static_cast<AliTriggerAnalysis*> (fTriggerAnalysis.At(i))->SaveHistograms();
531 gDirectory->cd("..");
534 if (fBackgroundIdentification)
536 gDirectory->mkdir("background_identification");
537 gDirectory->cd("background_identification");
539 fBackgroundIdentification->GetOutput()->Write();
541 gDirectory->cd("..");
545 gDirectory->cd("..");