]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - ANALYSIS/AliPhysicsSelection.cxx
warnings fixed
[u/mrichter/AliRoot.git] / ANALYSIS / AliPhysicsSelection.cxx
index ec2bbc5d106177f117098523e9a9e37bb4e0470e..a083baed725d7c32c008865d5004e1c4457edf3f 100644 (file)
 // To print statistics after processing use:
 //   fPhysicsSelection->Print();
 //
-//   Origin: Jan Fiete Grosse-Oetringhaus, CERN
+// The BX ids corresponding to real bunches crossings p2 are
+// automatically selected. You cannot process runs with different
+// filling schemes if this option is set. If you want to disable this,
+// use: 
+//   fPhysicsSelection->SetUseBXNumbers(0);
+//
+//
+// If you are analizing muons and you want to keep the muon triggers
+// besides the CINT1B you can set:
+//   fPhysicsSelection->SetUseMuonTriggers();
+//
+//
+// To compute the Background automatically using the control triggers
+// use: 
+//   fPhysicsSelection->SetComputeBG();
+// this will show the value of the Beam Gas, accidentals and good
+// events as additional rows in the statistic tables, but it will NOT
+// subtract the background automatically.
+// This option will only work for runs taken with the CINT1
+// suite. This options enables automatically also the usage of BX
+// numbers. You can only process one run at a time if you require this
+// options, because it uses the bunch intensity estimated run by run.
+// 
+// The BG will usually be more important in the so-called "bin 0": the
+// class can also compute the statistics table for events in this
+// bin. Since the definition of bin 0 may in general change from
+// analysis to analysis, the user needs to provide a callback
+// implementing the definition of bin zero. The callback should be
+// implemented as a method in the analysis task and should override
+// the IsEventInBinZero method of AliAnalysisTaskSE, and should thus
+// have the the following prototype:
+//   Bool_t IsEventInBinZero(); 
+// It should return true if the event is in the bin 0 and it is set by
+// passing to the physics selection the NAME of the task where the
+// callback is implemented: 
+//   fPhysicsSelection->SetBin0Callback("MyTask").
+//
+//
+// Usually the class selects the trigger scheme by itself depending on the run number.
+// Nevertheless, you can do that manually by calling AddCollisionTriggerClass() and AddBGTriggerClass()
+// Example:
+// To define the class CINT1B-ABCE-NOPF-ALL as collision trigger (those will be accepted as  
+// collision candidates when they pass the selection):
+//   AddCollisionTriggerClass("+CINT1B-ABCE-NOPF-ALL #769 #3119");
+// To select on bunch crossing IDs in addition, use:
+//   AddCollisionTriggerClass("+CINT1B-ABCE-NOPF-ALL #769 #3119");
+// To define the class CINT1A-ABCE-NOPF-ALL as a background trigger (those will only be counted
+// for the control histograms):
+//   AddBGTriggerClass("+CINT1A-ABCE-NOPF-ALL");
+// You can also specify more than one trigger class in a string or you can require that some are *not*
+// present. The following line would require CSMBA-ABCE-NOPF-ALL, but CSMBB-ABCE-NOPF-ALL is not allowed
+// to be present:
+//   AddBGTriggerClass("+CSMBA-ABCE-NOPF-ALL -CSMBB-ABCE-NOPF-ALL");
+//
+//   Origin: Jan Fiete Grosse-Oetringhaus, CERN 
+//           Michele Floris, CERN
 //-------------------------------------------------------------------------
 
 #include <Riostream.h>
 #include <AliLog.h>
 
 #include <AliESDEvent.h>
+#include <AliAnalysisTaskSE.h>
+#include "AliAnalysisManager.h"
 
 ClassImp(AliPhysicsSelection)
 
@@ -66,14 +123,27 @@ AliPhysicsSelection::AliPhysicsSelection() :
   fBGTrigClasses(),
   fTriggerAnalysis(),
   fBackgroundIdentification(0),
-  fHistStatistics(0),
-  fHistBunchCrossing(0)
+  fHistBunchCrossing(0),
+  fHistTriggerPattern(0),
+  fSkipTriggerClassSelection(0),
+  fUsingCustomClasses(0),
+  fSkipV0(0),
+  fBIFactorA(1),
+  fBIFactorC(1),
+  fComputeBG(0),
+  fUseBXNumbers(1),
+  fUseMuonTriggers(0),
+  fFillingScheme(""),
+  fBin0CallBack(""),
+  fBin0CallBackPointer(0)
 {
   // constructor
   
   fCollTrigClasses.SetOwner(1);
   fBGTrigClasses.SetOwner(1);
   fTriggerAnalysis.SetOwner(1);
+  fHistStatistics[0] = 0;
+  fHistStatistics[1] = 0;
   
   AliLog::SetClassDebugLevel("AliPhysicsSelection", AliLog::kWarning);
 }
@@ -81,15 +151,20 @@ AliPhysicsSelection::AliPhysicsSelection() :
 AliPhysicsSelection::~AliPhysicsSelection()
 {
   // destructor
-  
+
   fCollTrigClasses.Delete();
   fBGTrigClasses.Delete();
   fTriggerAnalysis.Delete();
 
-  if (fHistStatistics)
+  if (fHistStatistics[0])
   {
-    delete fHistStatistics;
-    fHistStatistics = 0;
+    delete fHistStatistics[0];
+    fHistStatistics[0] = 0;
+  }
+  if (fHistStatistics[1])
+  {
+    delete fHistStatistics[1];
+    fHistStatistics[1] = 0;
   }
   
   if (fHistBunchCrossing)
@@ -97,6 +172,12 @@ AliPhysicsSelection::~AliPhysicsSelection()
     delete fHistBunchCrossing;
     fHistBunchCrossing = 0;
   }
+  if (fHistTriggerPattern)
+  {
+    delete fHistTriggerPattern;
+    fHistTriggerPattern = 0;
+  }
+
 }
 
 Bool_t AliPhysicsSelection::CheckTriggerClass(const AliESDEvent* aEsd, const char* trigger) const
@@ -105,6 +186,9 @@ Bool_t AliPhysicsSelection::CheckTriggerClass(const AliESDEvent* aEsd, const cha
   // format of trigger: +TRIGGER1 -TRIGGER2
   //   requires TRIGGER1 and rejects TRIGGER2
   
+  Bool_t foundBCRequirement = kFALSE;
+  Bool_t foundCorrectBC = kFALSE;
+  
   TString str(trigger);
   TObjArray* tokens = str.Tokenize(" ");
   
@@ -112,28 +196,49 @@ Bool_t AliPhysicsSelection::CheckTriggerClass(const AliESDEvent* aEsd, const cha
   {
     TString str2(((TObjString*) tokens->At(i))->String());
     
-    if (str2[0] != '+' && str2[0] != '-')
-      AliFatal(Form("Invalid trigger syntax: %s", trigger));
-      
-    Bool_t flag = (str2[0] == '+');
-    
-    str2.Remove(0, 1);
-    
-    if (flag && !aEsd->IsTriggerClassFired(str2))
+    if (str2[0] == '+' || str2[0] == '-')
     {
-      AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is not present", str2.Data()));
-      delete tokens;
-      return kFALSE;
+      Bool_t flag = (str2[0] == '+');
+      
+      str2.Remove(0, 1);
+      
+      if (flag && !aEsd->IsTriggerClassFired(str2))
+      {
+        AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is not present", str2.Data()));
+        delete tokens;
+        return kFALSE;
+      }
+      if (!flag && aEsd->IsTriggerClassFired(str2))
+      {
+        AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is present", str2.Data()));
+        delete tokens;
+        return kFALSE;
+      }
     }
-    if (!flag && aEsd->IsTriggerClassFired(str2))
+    else if (str2[0] == '#')
     {
-      AliDebug(AliLog::kDebug, Form("Rejecting event because trigger class %s is present", str2.Data()));
-      delete tokens;
-      return kFALSE;
+      foundBCRequirement = kTRUE;
+    
+      str2.Remove(0, 1);
+      
+      Int_t bcNumber = str2.Atoi();
+      AliDebug(AliLog::kDebug, Form("Checking for bunch crossing number %d", bcNumber));
+      
+      if (aEsd->GetBunchCrossNumber() == bcNumber)
+      {
+        foundCorrectBC = kTRUE;
+        AliDebug(AliLog::kDebug, Form("Found correct bunch crossing %d", bcNumber));
+      }
     }
+    else
+      AliFatal(Form("Invalid trigger syntax: %s", trigger));
   }
   
   delete tokens;
+  
+  if (foundBCRequirement && !foundCorrectBC)
+    return kFALSE;
+  
   return kTRUE;
 }
     
@@ -163,7 +268,7 @@ Bool_t AliPhysicsSelection::IsCollisionCandidate(const AliESDEvent* aEsd)
     if (esdHeader->GetEventType() != 0)
       AliFatal(Form("Invalid event type for MC: %d", esdHeader->GetEventType()));
   }
-    
+  
   Bool_t accept = kFALSE;
     
   Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
@@ -185,81 +290,159 @@ Bool_t AliPhysicsSelection::IsCollisionCandidate(const AliESDEvent* aEsd)
     {
       triggerAnalysis->FillHistograms(aEsd);
   
-      fHistStatistics->Fill(1, i);
+      Bool_t isBin0 = kFALSE;
+      if (fBin0CallBack != "") {
+       AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
+       if (!mgr) {
+         AliError("Cannot get the analysis manager");
+       }  
+       else {
+         isBin0 = ((AliAnalysisTaskSE*)mgr->GetTask(fBin0CallBack.Data()))->IsEventInBinZero();
+       }
+      } else if (fBin0CallBackPointer) {
+         isBin0 = (*fBin0CallBackPointer)(aEsd);
+       
+      }
+      
+
       
       // hardware trigger (should only remove events for MC)
       // replay CINT1B hardware trigger
       // TODO this has to depend on the actual hardware trigger (and that depends on the run...)
       Int_t fastORHW = triggerAnalysis->SPDFiredChips(aEsd, 1); // SPD number of chips from trigger bits (!)
-      Bool_t v0A = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0A);
-      Bool_t v0C = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0C);
-        
-      if (fastORHW == 0 && !v0A && !v0C)
-      {
-        AliDebug(AliLog::kDebug, "Rejecting event because hardware trigger is not fired");
-        continue;
-      }
-      
-      fHistStatistics->Fill(2, i);
-    
+      Bool_t v0A       = fSkipV0 ? 0 :triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0A);
+      Bool_t v0C       = fSkipV0 ? 0 :triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0C);
+      Bool_t v0AHW     = fSkipV0 ? 0 :(triggerAnalysis->V0Trigger(aEsd, AliTriggerAnalysis::kASide, kTRUE) == AliTriggerAnalysis::kV0BB);// should replay hw trigger
+      Bool_t v0CHW     = fSkipV0 ? 0 :(triggerAnalysis->V0Trigger(aEsd, AliTriggerAnalysis::kCSide, kTRUE) == AliTriggerAnalysis::kV0BB);// should replay hw trigger
       // offline trigger
       Int_t fastOROffline = triggerAnalysis->SPDFiredChips(aEsd, 0); // SPD number of chips from clusters (!)
-      Bool_t v0ABG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0ABG);
-      Bool_t v0CBG = triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0CBG);
+      Bool_t v0ABG = fSkipV0 ? 0 :triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0ABG);
+      Bool_t v0CBG = fSkipV0 ? 0 :triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kV0CBG);
       Bool_t v0BG = v0ABG || v0CBG;
+
+      // fmd
+      Bool_t fmdA =  triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kFMDA);
+      Bool_t fmdC =  triggerAnalysis->IsOfflineTriggerFired(aEsd, AliTriggerAnalysis::kFMDC);
+      Bool_t fmd  = fmdA || fmdC;
     
-      if (fastOROffline > 0)
-        fHistStatistics->Fill(3, i);
-      if (fastOROffline > 1)
-        fHistStatistics->Fill(4, i);
-        
-      if (v0A)
-        fHistStatistics->Fill(5, i);
-      if (v0C)
-        fHistStatistics->Fill(6, i);
-      if (v0ABG)
-        fHistStatistics->Fill(7, i);
-      if (v0CBG)
-        fHistStatistics->Fill(8, i);
+      // SSD
+      Int_t ssdClusters = triggerAnalysis->SSDClusters(aEsd);
+
+      // Some "macros"
+      Bool_t mb1 = (fastOROffline > 0 || v0A || v0C) && (!v0BG);
+      Bool_t mb1prime = (fastOROffline > 1 || (fastOROffline > 0 && (v0A || v0C)) || (v0A && v0C) ) && (!v0BG);
+
+      // Background rejection
+      Bool_t bgID = kFALSE;
+      if (fBackgroundIdentification)
+        bgID = ! fBackgroundIdentification->IsSelected(const_cast<AliESDEvent*> (aEsd));
+      
+      Int_t ntrig = fastOROffline; // any 2 hits
+      if(v0A)              ntrig += 1;
+      if(v0C)              ntrig += 1; //v0C alone is enough
+      if(fmd)              ntrig += 1;
+      if(ssdClusters>1)    ntrig += 1;
+
+
+      Bool_t hwTrig = fastORHW > 0 || v0AHW || v0CHW;
+
+      // Fill trigger pattern histo
+      Int_t tpatt = 0;
+      if (fastORHW>0) tpatt+=1;
+      if (v0AHW)      tpatt+=2;
+      if (v0CHW)      tpatt+=4;
+      fHistTriggerPattern->Fill( tpatt );
+
+      // fill statistics and return decision
+      const Int_t nHistStat = 2;
+      for(Int_t iHistStat = 0; iHistStat < nHistStat; iHistStat++){
+       if (iHistStat == kStatIdxBin0 && !isBin0) continue; // skip the filling of bin0 stats if the event is not in the bin0
+      
+       fHistStatistics[iHistStat]->Fill(kStatTriggerClass, i);
+
+
+
+       // We fill the rest only if hw trigger is ok
+       if (!hwTrig)
+         {
+           AliDebug(AliLog::kDebug, "Rejecting event because hardware trigger is not fired");
+           continue;
+         } else {       
+         fHistStatistics[iHistStat]->Fill(kStatHWTrig, i);
+       }
+      
+
+       // v0 BG stats
+       if (v0ABG)
+         fHistStatistics[iHistStat]->Fill(kStatV0ABG, i);
+       if (v0CBG)
+         fHistStatistics[iHistStat]->Fill(kStatV0CBG, i);
+
+       // We fill the rest only if mb1 && ! v0BG
+       if (mb1)
+         fHistStatistics[iHistStat]->Fill(kStatMB1, i);
+       else continue;
+
+       if (mb1prime)
+         fHistStatistics[iHistStat]->Fill(kStatMB1Prime, i);
+
+       if (fmd)
+         fHistStatistics[iHistStat]->Fill(kStatFMD, i);
+
+       if(ssdClusters>1)
+         fHistStatistics[iHistStat]->Fill(kStatSSD1, i);
+
+       if(ntrig >= 2 && !v0BG) 
+         fHistStatistics[iHistStat]->Fill(kStatAny2Hits, i);
+
+       if (fastOROffline > 0)
+         fHistStatistics[iHistStat]->Fill(kStatFO1, i);
+       if (fastOROffline > 1)
+         fHistStatistics[iHistStat]->Fill(kStatFO2, i);
         
-      if (fastOROffline > 1 && !v0BG)
-        fHistStatistics->Fill(9, i);
+       if (v0A)
+         fHistStatistics[iHistStat]->Fill(kStatV0A, i);
+       if (v0C)
+         fHistStatistics[iHistStat]->Fill(kStatV0C, i);
         
-      if ((fastOROffline > 0 || v0A || v0C) && !v0BG)
-        fHistStatistics->Fill(10, i);
-    
-      if (fastOROffline > 0 && (v0A || v0C) && !v0BG)
-        fHistStatistics->Fill(11, i);
+       //       if (fastOROffline > 1 && !v0BG)
+       //         fHistStatistics[iHistStat]->Fill(kStatFO2NoBG, i);
+            
+       if (fastOROffline > 0 && (v0A || v0C) && !v0BG)
+         fHistStatistics[iHistStat]->Fill(kStatFO1AndV0, i);
   
-      if (v0A && v0C && !v0BG)
-        fHistStatistics->Fill(12, i);
-        
-      if (fastOROffline > 1 || (fastOROffline > 0 && (v0A || v0C)) || (v0A && v0C))
-      {
-        if (!v0BG)
-        {
-          fHistStatistics->Fill(13, i);
+       if (v0A && v0C && !v0BG && !bgID)
+         fHistStatistics[iHistStat]->Fill(kStatV0, i);
+
+
+       if ( mb1 )
+       
+         {
+           if (!v0BG || fSkipV0)
+             {
+               if (!v0BG) fHistStatistics[iHistStat]->Fill(kStatOffline, i);
       
-          if (fBackgroundIdentification && !fBackgroundIdentification->IsSelected(const_cast<AliESDEvent*> (aEsd)))
-          {
-            AliDebug(AliLog::kDebug, "Rejecting event because of background identification");
-            fHistStatistics->Fill(14, i);
-          }
-          else
-          {
-            AliDebug(AliLog::kDebug, "Accepted event for histograms");
+               if (fBackgroundIdentification && bgID)
+                 {
+                   AliDebug(AliLog::kDebug, "Rejecting event because of background identification");
+                   fHistStatistics[iHistStat]->Fill(kStatBG, i);
+                 }
+               else
+                 {
+                   AliDebug(AliLog::kDebug, "Accepted event for histograms");
             
-            fHistStatistics->Fill(15, i);
-            fHistBunchCrossing->Fill(aEsd->GetBunchCrossNumber(), i);
-            if (i < fCollTrigClasses.GetEntries())
-              accept = kTRUE;
-          }
-        }
-        else
-          AliDebug(AliLog::kDebug, "Rejecting event because of V0 BG flag");
+                   fHistStatistics[iHistStat]->Fill(kStatAccepted, i);
+                   if(iHistStat == kStatIdxAll) fHistBunchCrossing->Fill(aEsd->GetBunchCrossNumber(), i); // Fill only for all (avoid double counting)
+                   if((i < fCollTrigClasses.GetEntries() || fSkipTriggerClassSelection) && (iHistStat==kStatIdxAll))
+                     accept = kTRUE; // only set for "all" (should not really matter)
+                 }
+             }
+           else
+             AliDebug(AliLog::kDebug, "Rejecting event because of V0 BG flag");
+         }
+       else
+         AliDebug(AliLog::kDebug, "Rejecting event because trigger condition is not fulfilled");
       }
-      else
-        AliDebug(AliLog::kDebug, "Rejecting event because trigger condition is not fulfilled");
     }
   }
  
@@ -269,7 +452,7 @@ Bool_t AliPhysicsSelection::IsCollisionCandidate(const AliESDEvent* aEsd)
   return accept;
 }
 
-Int_t AliPhysicsSelection::GetTriggerScheme(UInt_t /* runNumber */)
+Int_t AliPhysicsSelection::GetTriggerScheme(UInt_t runNumber) const
 {
   // returns the current trigger scheme (classes that are accepted/rejected)
   
@@ -277,10 +460,171 @@ Int_t AliPhysicsSelection::GetTriggerScheme(UInt_t /* runNumber */)
     return 0;
     
   // TODO dependent on run number
+  
+  switch (runNumber)
+  {
+    // CSMBB triggers
+    case 104044:
+    case 105054:
+    case 105057:
+      return 2;
+  }
+  
+  // default: CINT1 suite
   return 1;
 }  
+
+const char * AliPhysicsSelection::GetFillingScheme(UInt_t runNumber)  {
+
+  if(fMC) return "MC";
+
+  if      (runNumber >= 104065 && runNumber <= 104160) {
+    return "4x4a";
+  } 
+  else if (runNumber >= 104315 && runNumber <= 104321) {
+    return "4x4a*";
+  }
+  else if (runNumber >= 104792 && runNumber <= 104803) {
+    return "4x4b";
+  }
+  else if (runNumber >= 104824 && runNumber <= 104892) {
+    return "4x4c";
+  }
+  else if (runNumber == 105143 || runNumber == 105160) {
+    return "16x16a";
+  }
+  else if (runNumber >= 105256 && runNumber <= 105268) {
+    return "4x4c";
+  } 
+  else if (runNumber >= 114786 && runNumber <= 116684) {
+    return "Single_2b_1_1_1";
+  }
+  else if (runNumber >= 117048 && runNumber <= 117120) {
+    return "Single_3b_2_2_2";
+  }
+  else if (runNumber >= 117220 && runNumber <= 119163) {
+    return "Single_2b_1_1_1";
+  }
+  else if (runNumber >= 119837 && runNumber <= 119862) {
+    return "Single_4b_2_2_2";
+  }
+  else if (runNumber >= 119902 && runNumber <= 120691) {
+    return "Single_6b_3_3_3";
+  }
+  else if (runNumber >= 120741 && runNumber <= 122375) {
+    return "Single_13b_8_8_8";
+  }
+  else {
+    AliError(Form("Unknown filling scheme (run %d)", runNumber));
+  }
+
+  return "Unknown";
+}
+
+const char * AliPhysicsSelection::GetBXIDs(UInt_t runNumber, const char * trigger)  {
+
+  if (!fUseBXNumbers || fMC) return "";
+
+  if      (runNumber >= 104065 && runNumber <= 104160) {
+    if     (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return " #2128 #3019";
+    else if(!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return " #346 #3465";
+    else if(!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return " #1234 #1680";
+    else if(!strcmp("CINT1-E-NOPF-ALL",trigger))     return " #790";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  } 
+  else if (runNumber >= 104315 && runNumber <= 104321) {
+    if     (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return " #2000 #2891";
+    else if(!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return " #218 #3337";
+    else if(!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return " #1106 #1552";
+    else if(!strcmp("CINT1-E-NOPF-ALL",trigger))     return " #790";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  }
+  else if (runNumber >= 104792 && runNumber <= 104803) {
+    if     (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return " #2228 #3119";
+    else if(!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return " #2554 #446";
+    else if(!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return " #1334 #769";
+    else if(!strcmp("CINT1-E-NOPF-ALL",trigger))     return " #790";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  }
+  else if (runNumber >= 104824 && runNumber <= 104892) {
+    if     (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return " #3119 #769";
+    else if(!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return " #2554 #446";
+    else if(!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return " #1334 #2228";
+    else if(!strcmp("CINT1-E-NOPF-ALL",trigger))     return " #790";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  }
+  else if (runNumber == 105143 || runNumber == 105160) {
+    if     (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return " #1337 #1418 #2228 #2309 #3119 #3200 #446 #527";
+    else if(!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return " #1580  #1742  #1904  #2066  #2630  #2792  #2954  #3362";
+    else if(!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return "  #845  #1007  #1169   #1577 #3359 #3521 #119  #281 ";
+    else if(!strcmp("CINT1-E-NOPF-ALL",trigger))     return " #790";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  }
+  else if (runNumber >= 105256 && runNumber <= 105268) {
+    if     (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return " #3019 #669";
+    else if(!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return " #2454 #346";
+    else if(!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return " #1234 #2128";
+    else if(!strcmp("CINT1-E-NOPF-ALL",trigger))     return " #790";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  } else if (runNumber >= 114786 && runNumber <= 116684) { // 7 TeV 2010, assume always the same filling scheme
+    if     (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return " #346";
+    else if(!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return " #2131";
+    else if(!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return " #3019";
+    else if(!strcmp("CINT1-E-NOPF-ALL",trigger))     return " #1238";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  }
+  else if (runNumber >= 117048 && runNumber <= 117120) {
+    //    return "Single_3b_2_2_2";
+   if      (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return "   #346  #1240 ";
+   else if (!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return "   #2131 ";
+   else if (!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return "   #3019 ";
+   else if (!strcmp("CINT1-E-NOPF-ALL",trigger)) return " #1238";
+   else AliError(Form("Unknown trigger: %s", trigger));
+
+  }
+  else if (runNumber >= 117220 && runNumber <= 119163) {
+    //    return "Single_2b_1_1_1";
+    if      (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return "   #346 ";
+    else if (!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return "   #2131 ";
+    else if (!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return "   #3019 ";
+    else if (!strcmp("CINT1-E-NOPF-ALL",trigger)) return " #1238 ";
+    else AliError(Form("Unknown trigger: %s", trigger));                                                   
+  }
+  else if (runNumber >= 119837 && runNumber <= 119862) {
+    //    return "Single_4b_2_2_2";
+    if      (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return "   #669  #3019 ";
+    else if (!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return "   #346  #2454 ";
+    else if (!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return "   #1234  #2128 ";
+    else if (!strcmp("CINT1-E-NOPF-ALL",trigger)) return " #1681 #3463";
+    else AliError(Form("Unknown trigger: %s", trigger));
+
+  }
+  else if (runNumber >= 119902 && runNumber <= 120691) {
+    //    return "Single_6b_3_3_3";
+    if      (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return "   #346  #546  #746 ";
+    else if (!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return "   #2131  #2331  #2531 ";
+    else if (!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return "   #3019  #3219  #3419 ";
+    else if (!strcmp("CINT1-E-NOPF-ALL",trigger)) return " #1296 #1670";
+    else AliError(Form("Unknown trigger: %s", trigger));
+  }
+  else if (runNumber >= 120741 && runNumber <= 122375) {
+    //    return "Single_13b_8_8_8";
+    if      (!strcmp("CINT1B-ABCE-NOPF-ALL",trigger)) return "   #346  #446  #546  #646  #1240  #1340  #1440  #1540 ";
+    else if (!strcmp("CINT1A-ABCE-NOPF-ALL",trigger)) return "   #946  #2131  #2231  #2331  #2431 ";
+    else if (!strcmp("CINT1C-ABCE-NOPF-ALL",trigger)) return "   #3019  #3119  #3219  #3319  #3519 ";
+    else if (!strcmp("CINT1-E-NOPF-ALL",trigger)) return " #1835 #2726";
+    else AliError(Form("Unknown trigger: %s", trigger));
     
-Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
+  }
+
+  else {
+    AliError(Form("Unknown run %d, using all BXs!",runNumber));
+  }
+
+  return "";
+}
+    
+Bool_t AliPhysicsSelection::Initialize(Int_t runNumber)
 {
   // initializes the object for the given run
   // 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
@@ -288,40 +632,80 @@ Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
   Bool_t oldStatus = TH1::AddDirectoryStatus();
   TH1::AddDirectory(kFALSE);
   
+  if(!fBin0CallBack) 
+    AliError("Bin0 Callback not set: will not fill the statistics for the bin 0");
+
+  if (fMC) {
+    // ovverride BX and bg options in case of MC
+    fComputeBG    = kFALSE;
+    fUseBXNumbers = kFALSE;
+  }
+
   Int_t triggerScheme = GetTriggerScheme(runNumber);
-  
-  if (fCurrentRun != -1 && triggerScheme != GetTriggerScheme(fCurrentRun))
+  if (!fUsingCustomClasses && fCurrentRun != -1 && triggerScheme != GetTriggerScheme(fCurrentRun))
     AliFatal("Processing several runs with different trigger schemes is not supported");
   
+  if(fComputeBG && fCurrentRun != -1 && fCurrentRun != runNumber) 
+    AliFatal("Cannot process several runs because BG computation is requested");
+
+  if(fComputeBG && !fUseBXNumbers) 
+    AliFatal("Cannot compute BG id BX numbers are not used");
+  
+  if(fUseBXNumbers && fFillingScheme != "" && fFillingScheme != GetFillingScheme(runNumber))
+    AliFatal("Cannot process runs with different filling scheme if usage of BX numbers is requested");
+
+  fFillingScheme      = GetFillingScheme(runNumber);
+
+  if(fComputeBG) SetBIFactors(runNumber);
+
   AliInfo(Form("Initializing for run %d", runNumber));
   
-  Bool_t firstTime = kFALSE;
+  // initialize first time?
   if (fCurrentRun == -1)
   {
-    // initialize first time
-    fCurrentRun = runNumber;
-    firstTime = kTRUE;
-  }
-  
-  if (firstTime)
-  {
-    switch (triggerScheme)
-    {
+    if (fUsingCustomClasses) {
+      AliInfo("Using user-provided trigger classes");
+    } else {
+      switch (triggerScheme)
+      {
       case 0:
         fCollTrigClasses.Add(new TObjString(""));
         break;
-      
+        
       case 1:
-        fCollTrigClasses.Add(new TObjString("+CINT1B-ABCE-NOPF-ALL"));
-        fBGTrigClasses.Add(new TObjString("+CINT1A-ABCE-NOPF-ALL"));
-        fBGTrigClasses.Add(new TObjString("+CINT1C-ABCE-NOPF-ALL"));
-        fBGTrigClasses.Add(new TObjString("+CINT1-E-NOPF-ALL"));
+       { // need a new scope to avoid cross-initialization errors
+
+         if (fUseMuonTriggers) {
+           // Muon trigger have the same BXIDs of the corresponding CINT triggers
+           fCollTrigClasses.Add(new TObjString(Form("%s%s ","+CMUS1B-ABCE-NOPF-MUON",  GetBXIDs(runNumber,"CINT1B-ABCE-NOPF-ALL"))));
+           fBGTrigClasses.Add  (new TObjString(Form("%s%s ","+CMUS1A-ABCE-NOPF-MUON",  GetBXIDs(runNumber,"CINT1A-ABCE-NOPF-ALL"))));
+           fBGTrigClasses.Add  (new TObjString(Form("%s%s ","+CMUS1C-ABCE-NOPF-MUON",  GetBXIDs(runNumber,"CINT1C-ABCE-NOPF-ALL"))));      
+           fBGTrigClasses.Add  (new TObjString(Form("%s%s ","+CMUS1-E-NOPF-MUON"    ,  GetBXIDs(runNumber,"CINT1-E-NOPF-ALL"))));
+         }
+         TObjString * cint1b = new TObjString(Form("%s%s","+CINT1B-ABCE-NOPF-ALL",  GetBXIDs(runNumber,"CINT1B-ABCE-NOPF-ALL")));
+         TObjString * cint1a = new TObjString(Form("%s%s","+CINT1A-ABCE-NOPF-ALL",  GetBXIDs(runNumber,"CINT1A-ABCE-NOPF-ALL")));
+         TObjString * cint1c = new TObjString(Form("%s%s","+CINT1C-ABCE-NOPF-ALL",  GetBXIDs(runNumber,"CINT1C-ABCE-NOPF-ALL")));
+         TObjString * cint1e = new TObjString(Form("%s%s","+CINT1-E-NOPF-ALL",      GetBXIDs(runNumber,"CINT1-E-NOPF-ALL"))    );
+         //
+         fCollTrigClasses.Add(cint1b);
+         fBGTrigClasses.Add(cint1a);
+         fBGTrigClasses.Add(cint1c);
+         fBGTrigClasses.Add(cint1e);
+
+       }
+        break;
+        
+      case 2:
+        fCollTrigClasses.Add(new TObjString("+CSMBB-ABCE-NOPF-ALL"));
+        fBGTrigClasses.Add(new TObjString("+CSMBA-ABCE-NOPF-ALL -CSMBB-ABCE-NOPF-ALL"));
+        fBGTrigClasses.Add(new TObjString("+CSMBC-ABCE-NOPF-ALL -CSMBB-ABCE-NOPF-ALL"));
         break;
         
       default:
         AliFatal(Form("Unsupported trigger scheme %d", triggerScheme));
+      }
     }
-  
+    
     Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
     
     for (Int_t i=0; i<count; i++)
@@ -333,46 +717,53 @@ Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
       fTriggerAnalysis.Add(triggerAnalysis);
     }
       
-    if (fHistStatistics)
-      delete fHistStatistics;
+    // TODO: shall I really delete this?
+    if (fHistStatistics[0])
+      delete fHistStatistics[0];
+    if (fHistStatistics[1])
+      delete fHistStatistics[1];
   
-    fHistStatistics = new TH2F("fHistStatistics", "fHistStatistics;;", 15, 0.5, 15.5, count, -0.5, -0.5 + count);
-      
-    Int_t n = 1;
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "Trigger class");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "Hardware trigger");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A BG");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0C BG");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 2 &!V0 BG");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 1 | V0A | V0C) & !V0 BG");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "FO >= 1 & (V0A | V0C) & !V0 BG");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "V0A & V0C & !V0 BG");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "(FO >= 2 | (FO >= 1 & (V0A | V0C)) | (V0A & V0C)) & !V0 BG");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "Background identification");
-    fHistStatistics->GetXaxis()->SetBinLabel(n++, "Accepted");
+    fHistStatistics[kStatIdxBin0] = BookHistStatistics("_Bin0");
+    fHistStatistics[kStatIdxAll]  = BookHistStatistics("");
     
     if (fHistBunchCrossing)
       delete fHistBunchCrossing;
   
     fHistBunchCrossing = new TH2F("fHistBunchCrossing", "fHistBunchCrossing;bunch crossing number;", 4000, -0.5, 3999.5,  count, -0.5, -0.5 + count);
-      
+
+    if (fHistTriggerPattern)
+      delete fHistTriggerPattern;
+    
+    const int ntrig=3;
+    Int_t n = 1;
+    const Int_t nbinTrig = TMath::Nint(TMath::Power(2,ntrig));
+
+    fHistTriggerPattern = new TH1F("fHistTriggerPattern", "Trigger pattern: FO + 2*v0A + 4*v0C", 
+                                  nbinTrig, -0.5, nbinTrig-0.5);    
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(1,"NO TRIG");
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(2,"FO");
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(3,"v0A");
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(4,"FO & v0A");
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(5,"v0C");
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(6,"FO & v0C");
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(7,"v0A & v0C");
+    fHistTriggerPattern->GetXaxis()->SetBinLabel(8,"FO & v0A & v0C");
+
+  
     n = 1;
     for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
     {
-      fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
       fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
       n++;
     }
     for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
     {
-      fHistStatistics->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
       fHistBunchCrossing->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
       n++;
     }
+
+    
+
   }
     
   Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
@@ -394,11 +785,74 @@ Bool_t AliPhysicsSelection::Initialize(UInt_t runNumber)
     }
   }
     
+  fCurrentRun = runNumber;
+  
   TH1::AddDirectory(oldStatus);
   
   return kTRUE;
 }
 
+TH2F * AliPhysicsSelection::BookHistStatistics(const char * tag) {
+
+    // add 6 rows to count for the estimate of good, accidentals and
+    // BG and the ratio of BG and accidentals to total +ratio goot to
+    // first col + 2 for error on good.
+
+  Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
+#ifdef VERBOSE_STAT
+  Int_t extrarows = fComputeBG ? 8 : 0;
+#else
+  Int_t extrarows = fComputeBG ? 3 : 0;
+#endif
+  TH2F * h = new TH2F(Form("fHistStatistics%s",tag), Form("fHistStatistics - %s ;;",tag), kStatAccepted, 0.5, kStatAccepted+0.5, count+extrarows, -0.5, -0.5 + count+extrarows);
+
+  h->GetXaxis()->SetBinLabel(kStatTriggerClass,  "Trigger class");
+  h->GetXaxis()->SetBinLabel(kStatHWTrig,       "Hardware trigger");
+  h->GetXaxis()->SetBinLabel(kStatFO1,          "FO >= 1");
+  h->GetXaxis()->SetBinLabel(kStatFO2,          "FO >= 2");
+  h->GetXaxis()->SetBinLabel(kStatV0A,          "V0A");
+  h->GetXaxis()->SetBinLabel(kStatV0C,          "V0C");
+  h->GetXaxis()->SetBinLabel(kStatFMD,          "FMD");
+  h->GetXaxis()->SetBinLabel(kStatSSD1,                 "SSD >= 2");
+  h->GetXaxis()->SetBinLabel(kStatV0ABG,        "V0A BG");
+  h->GetXaxis()->SetBinLabel(kStatV0CBG,        "V0C BG");
+  h->GetXaxis()->SetBinLabel(kStatMB1,          "(FO >= 1 | V0A | V0C) & !V0 BG");
+  h->GetXaxis()->SetBinLabel(kStatMB1Prime,      "(FO >= 2 | (FO >= 1 & (V0A | V0C)) | (V0A &v0C) ) & !V0 BG");
+  h->GetXaxis()->SetBinLabel(kStatFO1AndV0,     "FO >= 1 & (V0A | V0C) & !V0 BG");
+  h->GetXaxis()->SetBinLabel(kStatV0,           "V0A & V0C & !V0 BG & !BG ID");
+  h->GetXaxis()->SetBinLabel(kStatOffline,      "Offline Trigger");
+  h->GetXaxis()->SetBinLabel(kStatAny2Hits,     "2 Hits & !V0 BG");
+  h->GetXaxis()->SetBinLabel(kStatBG,           "Background identification");
+  h->GetXaxis()->SetBinLabel(kStatAccepted,      "Accepted");
+
+  Int_t n = 1;
+  for (Int_t i=0; i < fCollTrigClasses.GetEntries(); i++)
+    {
+      h->GetYaxis()->SetBinLabel(n, ((TObjString*) fCollTrigClasses.At(i))->String());
+      n++;
+    }
+  for (Int_t i=0; i < fBGTrigClasses.GetEntries(); i++)
+    {
+      h->GetYaxis()->SetBinLabel(n, ((TObjString*) fBGTrigClasses.At(i))->String());
+      n++;
+    }
+
+  if(fComputeBG) {
+    h->GetYaxis()->SetBinLabel(n++, "BG (A+C)");
+    h->GetYaxis()->SetBinLabel(n++, "ACC");
+#ifdef VERBOSE_STAT
+    h->GetYaxis()->SetBinLabel(n++, "BG (A+C) %  (rel. to CINT1B)");
+    h->GetYaxis()->SetBinLabel(n++, "ACC % (rel. to CINT1B)");
+    h->GetYaxis()->SetBinLabel(n++, "ERR GOOD %");
+    h->GetYaxis()->SetBinLabel(n++, "GOOD % (rel. to 1st col)");
+    h->GetYaxis()->SetBinLabel(n++, "ERR GOOD");
+#endif
+    h->GetYaxis()->SetBinLabel(n++, "GOOD");
+  }
+
+  return h;
+}
+
 void AliPhysicsSelection::Print(Option_t* /* option */) const
 {
   // print the configuration
@@ -425,12 +879,12 @@ void AliPhysicsSelection::Print(Option_t* /* option */) const
     triggerAnalysis->PrintTriggerClasses();
   }
   
-  if (fHistStatistics && fCollTrigClasses.GetEntries() > 0)
+  if (fHistStatistics[kStatIdxAll] && fCollTrigClasses.GetEntries() > 0)
   {
     Printf("\nSelection statistics for first collision trigger (%s):", ((TObjString*) fCollTrigClasses.First())->String().Data());
     
-    Printf("Total events with correct trigger class: %d", (Int_t) fHistStatistics->GetBinContent(1, 1));
-    Printf("Selected collision candidates: %d", (Int_t) fHistStatistics->GetBinContent(fHistStatistics->GetXaxis()->FindBin("Accepted"), 1));
+    Printf("Total events with correct trigger class: %d", (Int_t) fHistStatistics[kStatIdxAll]->GetBinContent(1, 1));
+    Printf("Selected collision candidates: %d", (Int_t) fHistStatistics[kStatIdxAll]->GetBinContent(fHistStatistics[kStatIdxAll]->GetXaxis()->FindBin("Accepted"), 1));
   }
   
   if (fHistBunchCrossing)
@@ -461,6 +915,16 @@ void AliPhysicsSelection::Print(Option_t* /* option */) const
         Printf("WARNING: Bunch crossing %d has more than one trigger class active. Check BPTX functioning for this run!", (Int_t) fHistBunchCrossing->GetXaxis()->GetBinCenter(j));
     }
   }
+
+  if (fUsingCustomClasses)        
+    Printf("WARNING: Using custom trigger classes!");
+  if (fSkipTriggerClassSelection) 
+    Printf("WARNING: Skipping trigger class selection!");
+  if (fSkipV0) 
+    Printf("WARNING: Ignoring V0 information in selection");
+  if(!fBin0CallBack) 
+    Printf("WARNING: Callback not set: will not fill the statistics for the bin 0");
+
 }
 
 Long64_t AliPhysicsSelection::Merge(TCollection* list)
@@ -490,23 +954,31 @@ Long64_t AliPhysicsSelection::Merge(TCollection* list)
       continue;
       
     collections[0].Add(&(entry->fTriggerAnalysis));
-    if (entry->fHistStatistics)
-      collections[1].Add(entry->fHistStatistics);
+    if (entry->fHistStatistics[0])
+      collections[1].Add(entry->fHistStatistics[0]);
+    if (entry->fHistStatistics[1])
+      collections[2].Add(entry->fHistStatistics[1]);
     if (entry->fHistBunchCrossing)
-      collections[2].Add(entry->fHistBunchCrossing);
+      collections[3].Add(entry->fHistBunchCrossing);
+    if (entry->fHistTriggerPattern)
+      collections[4].Add(entry->fHistTriggerPattern);
     if (entry->fBackgroundIdentification)
-      collections[3].Add(entry->fBackgroundIdentification);
+      collections[5].Add(entry->fBackgroundIdentification);
 
     count++;
   }
 
   fTriggerAnalysis.Merge(&collections[0]);
-  if (fHistStatistics)
-    fHistStatistics->Merge(&collections[1]);
+  if (fHistStatistics[0])
+    fHistStatistics[0]->Merge(&collections[1]);
+  if (fHistStatistics[1])
+    fHistStatistics[1]->Merge(&collections[2]);
   if (fHistBunchCrossing)
-    fHistBunchCrossing->Merge(&collections[2]);
+    fHistBunchCrossing->Merge(&collections[3]);
+  if (fHistTriggerPattern)
+    fHistTriggerPattern->Merge(&collections[4]);
   if (fBackgroundIdentification)
-    fBackgroundIdentification->Merge(&collections[3]);
+    fBackgroundIdentification->Merge(&collections[5]);
   
   delete iter;
 
@@ -517,7 +989,7 @@ void AliPhysicsSelection::SaveHistograms(const char* folder) const
 {
   // write histograms to current directory
   
-  if (!fHistStatistics)
+  if (!fHistStatistics[0] || !fHistStatistics[1])
     return;
     
   if (folder)
@@ -526,8 +998,100 @@ void AliPhysicsSelection::SaveHistograms(const char* folder) const
     gDirectory->cd(folder);
   }
   
-  fHistStatistics->Write();
-  fHistBunchCrossing->Write();
+
+  // Fill the last rows of fHistStatistics before saving
+  if (fComputeBG) {
+    Int_t triggerScheme = GetTriggerScheme(UInt_t(fCurrentRun));
+    if(triggerScheme != 1){
+      AliWarning("BG estimate only supported for trigger scheme \"1\" (CINT1 suite)");
+    } else if (fUseMuonTriggers) {
+      AliWarning("BG estimate with muon triggers to be implemented");
+    } else {
+      // 0. Determine the ratios of triggers E/B, A/B, C/B from the stat histogram
+      // Those are used to rescale the different classes to the same number of bx ids
+      Float_t nB = 0;
+      Float_t nC = 0;
+      Float_t nA = 0;
+      Float_t nE = 0;
+      for (Int_t j=1; j<=fHistBunchCrossing->GetNbinsX(); j++) {
+       if (fHistBunchCrossing->GetBinContent(j, 1) > 0) nB++;
+       if (fHistBunchCrossing->GetBinContent(j, 2) > 0) nA++;
+       if (fHistBunchCrossing->GetBinContent(j, 3) > 0) nC++;
+       if (fHistBunchCrossing->GetBinContent(j, 4) > 0) nE++;
+      }
+      Float_t ratioBE = nB/nE;
+      Float_t ratioBA = nB/nA;
+      Float_t ratioBC = nB/nC;
+      Printf("Ratio between the BX ids in the different trigger classes:");
+      Printf("  B/E = %f",ratioBE);
+      Printf("  B/A = %f",ratioBA);
+      Printf("  B/C = %f",ratioBC);
+      Int_t nHistStat = 2;
+      // TODO: get number of rows in a more flexible way
+      // 1. loop over all cols
+
+      for(Int_t iHistStat = 0; iHistStat < nHistStat; iHistStat++){
+    
+       Int_t ncol = fHistStatistics[iHistStat]->GetNbinsX();
+       Float_t good1 = 0;
+       for(Int_t icol = 1; icol <= ncol; icol++) {
+         Int_t cint1B = (Int_t) fHistStatistics[iHistStat]->GetBinContent(icol,1);     
+         Int_t cint1A = (Int_t) fHistStatistics[iHistStat]->GetBinContent(icol,2);     
+         Int_t cint1C = (Int_t) fHistStatistics[iHistStat]->GetBinContent(icol,3);     
+         Int_t cint1E = (Int_t) fHistStatistics[iHistStat]->GetBinContent(icol,4);      
+      
+         if (cint1B>0) {
+           Int_t acc  = ratioBE*cint1E; 
+           Double_t acc_err = TMath::Sqrt(ratioBE*ratioBE*cint1E);
+           //      Int_t bg   = cint1A + cint1C - 2*acc;
+           Float_t bg   = fBIFactorA*(ratioBA*cint1A-acc) + fBIFactorC*(ratioBC*cint1C-acc) ;
+           Float_t good = Float_t(cint1B) - bg - acc;
+           if (icol ==1) good1 = good;
+           //      Float_t errGood     = TMath::Sqrt(2*(cint1A+cint1C+cint1E));// Error on the number of goods assuming only bg fluctuates
+           //      DeltaG^2 = B + FA^2 A + FC^2 C + Ratio^2 (FA+FC-1)^2 E.
+           Float_t errGood     = TMath::Sqrt( cint1B + 
+                                              fBIFactorA*fBIFactorA*ratioBA*ratioBA*cint1A +
+                                              fBIFactorC*fBIFactorC*ratioBC*ratioBC*cint1C +
+                                              ratioBE * ratioBE * 
+                                              (fBIFactorA + fBIFactorC - 1)*(fBIFactorA + fBIFactorC - 1)*cint1E);
+           Float_t errBG = TMath::Sqrt(fBIFactorA*fBIFactorA*ratioBA*ratioBA*cint1A+
+                                       fBIFactorC*fBIFactorC*ratioBC*ratioBC*cint1C+
+                                       ratioBE*ratioBE*(fBIFactorA+fBIFactorC)*(fBIFactorA+fBIFactorC)*cint1E);
+       
+       
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowBG,bg);      
+           fHistStatistics[iHistStat]->SetBinError  (icol,kStatRowBG,errBG);   
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowAcc,acc);    
+           fHistStatistics[iHistStat]->SetBinError  (icol,kStatRowAcc,acc_err);        
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowGood,good);    
+           fHistStatistics[iHistStat]->SetBinError  (icol,kStatRowGood,errGood);    
+
+#ifdef VERBOSE_STAT
+           //kStatRowBG=5,kStatRowAcc,kStatRowBGFrac,kStatRowAccFrac,kStatRowErrGoodFrac,kStatRowGoodFrac,kStatRowGood,kStatRowErrGood
+           Float_t accFrac   = Float_t(acc) / cint1B  *100;
+           Float_t errAccFrac= Float_t(acc_err) / cint1B  *100;
+           Float_t bgFrac    = Float_t(bg)  / cint1B  *100;
+           Float_t goodFrac  = Float_t(good)  / good1 *100;
+           Float_t errGoodFrac = errGood/good1 * 100;
+           Float_t errFracBG = bg > 0 ? TMath::Sqrt((errBG/bg)*(errBG/bg) + 1/cint1B)*bgFrac : 0;
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowBGFrac,bgFrac);      
+           fHistStatistics[iHistStat]->SetBinError  (icol,kStatRowBGFrac,errFracBG);   
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowAccFrac,accFrac);    
+           fHistStatistics[iHistStat]->SetBinError  (icol,kStatRowAccFrac,errAccFrac);    
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowGoodFrac,goodFrac);    
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowErrGoodFrac,errGoodFrac);    
+           fHistStatistics[iHistStat]->SetBinContent(icol,kStatRowErrGood,errGood);    
+#endif
+         }
+       }
+      }
+    }  
+  }
+
+  fHistStatistics[0]->Write();
+  fHistStatistics[1]->Write();
+  if(fHistBunchCrossing ) fHistBunchCrossing ->Write();
+  if(fHistTriggerPattern) fHistTriggerPattern->Write();
   
   Int_t count = fCollTrigClasses.GetEntries() + fBGTrigClasses.GetEntries();
   for (Int_t i=0; i < count; i++)
@@ -559,3 +1123,126 @@ void AliPhysicsSelection::SaveHistograms(const char* folder) const
   if (folder)
     gDirectory->cd("..");
 }
+
+void AliPhysicsSelection::SetBIFactors(Int_t run) {
+
+  switch(run) {
+  case 104155:
+    fBIFactorA = 0.961912722908;
+    fBIFactorC = 1.04992336081;
+    break;
+  case 104157:
+    fBIFactorA = 0.947312854998;
+    fBIFactorC = 1.01599706417;
+    break;
+  case 104159:
+    fBIFactorA = 0.93659320151;
+    fBIFactorC = 0.98580804207;
+    break;
+  case 104160:
+    fBIFactorA = 0.929664189926;
+    fBIFactorC = 0.963467679851;
+    break;
+  case 104315:
+    fBIFactorA = 1.08939104979;
+    fBIFactorC = 0.931113921925;
+    break;
+  case 104316:
+    fBIFactorA = 1.08351880974;
+    fBIFactorC = 0.916068345845;
+    break;
+  case 104320:
+    fBIFactorA = 1.07669281245;
+    fBIFactorC = 0.876818744763;
+    break;
+  case 104321:
+    fBIFactorA = 1.00971079602;
+    fBIFactorC = 0.773781299076;
+    break;
+  case 104792:
+    fBIFactorA = 0.787215863962;
+    fBIFactorC = 0.778253173071;
+    break;
+  case 104793:
+    fBIFactorA = 0.692211363661;
+    fBIFactorC = 0.733152456667;
+    break;
+  case 104799:
+    fBIFactorA = 1.04027825161;
+    fBIFactorC = 1.00530825942;
+    break;
+  case 104800:
+    fBIFactorA = 1.05309910671;
+    fBIFactorC = 1.00376801855;
+    break;
+  case 104801:
+    fBIFactorA = 1.0531231922;
+    fBIFactorC = 0.992439666758;
+    break;
+  case 104802:
+    fBIFactorA = 1.04191478134;
+    fBIFactorC = 0.979368585208;
+    break;
+  case 104803:
+    fBIFactorA = 1.03121314094;
+    fBIFactorC = 0.973379962609;
+    break;
+  case 104824:
+    fBIFactorA = 0.969945926722;
+    fBIFactorC = 0.39549745806;
+    break;
+  case 104825:
+    fBIFactorA = 0.968627213937;
+    fBIFactorC = 0.310100412205;
+    break;
+  case 104841:
+    fBIFactorA = 0.991601393212;
+    fBIFactorC = 0.83762204722;
+    break;
+  case 104845:
+    fBIFactorA = 0.98040863886;
+    fBIFactorC = 0.694824205793;
+    break;
+  case 104867:
+    fBIFactorA = 1.10646173412;
+    fBIFactorC = 0.841407246916;
+    break;
+  case 104876:
+    fBIFactorA = 1.12063452421;
+    fBIFactorC = 0.78726542895;
+    break;
+  case 104890:
+    fBIFactorA = 1.02346137453;
+    fBIFactorC = 1.03355663595;
+    break;
+  case 104892:
+    fBIFactorA = 1.05406025913;
+    fBIFactorC = 1.00029166135;
+    break;
+  case 105143:
+    fBIFactorA = 0.947343384349;
+    fBIFactorC = 0.972637444408;
+    break;
+  case 105160:
+    fBIFactorA = 0.908854622177;
+    fBIFactorC = 0.958851103977;
+    break; 
+  case 105256:
+    fBIFactorA = 0.810076150206;
+    fBIFactorC = 0.884663561883;
+    break;
+  case 105257:
+    fBIFactorA = 0.80974912303;
+    fBIFactorC = 0.878859123479;
+    break;
+  case 105268:
+    fBIFactorA = 0.809052110679;
+    fBIFactorC = 0.87233890989;
+    break;
+  default:
+    fBIFactorA = 1;
+    fBIFactorC = 1;
+  }
+
+
+}