From: lmilano <lmilano@cern.ch>
Date: Thu, 29 May 2014 08:46:09 +0000 (+0200)
Subject: update from Prabhat
X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=commitdiff_plain;h=c4ccbacd672d7e93d800f4becc2780ec46bdddf2

update from Prabhat
---

diff --git a/PWGCF/Correlations/DPhi/AliAnalysisTaskDptDptCorrelations.cxx b/PWGCF/Correlations/DPhi/AliAnalysisTaskDptDptCorrelations.cxx
index bf1253141bc..7c92a6c3e21 100644
--- a/PWGCF/Correlations/DPhi/AliAnalysisTaskDptDptCorrelations.cxx
+++ b/PWGCF/Correlations/DPhi/AliAnalysisTaskDptDptCorrelations.cxx
@@ -1167,6 +1167,8 @@ void  AliAnalysisTaskDptDptCorrelations::UserExec(Option_t */*option*/)
       
       //*********************************************************
       TExMap *trackMap = new TExMap();//Mapping matrix----                                            
+      TRandom *ran = new TRandom(); //random eff. correction
+
       //1st loop track for Global tracks                                                                                
       for(Int_t i = 0; i < _nTracks; i++)
 	{
@@ -1192,7 +1194,16 @@ void  AliAnalysisTaskDptDptCorrelations::UserExec(Option_t */*option*/)
 	  
 	  bitOK  = t->TestFilterBit(_trackFilterBit);
 	  if (!bitOK) continue; //128bit or 272bit
-	  	  
+
+	  //------- Eff. test----------
+	  Double_t yy = (1-0.7)/1.8;
+          Double_t zz = (pt-0.2);
+          Double_t effValue = 0.7+yy*zz;
+          Double_t R = ran->Uniform(0,1);
+
+          if(R > effValue) continue;
+	  //---------------------------
+
 	  Int_t gID = t->GetID();
 	  newAodTrack = gID >= 0 ?t : fAODEvent->GetTrack(trackMap->GetValue(-1-gID));
 	  
@@ -1241,10 +1252,10 @@ void  AliAnalysisTaskDptDptCorrelations::UserExec(Option_t */*option*/)
 
 
 	  //==== QA ===========================
-	  _dcaz->Fill(DCAZ);
-	  _dcaxy->Fill(DCAXY);
-	  _etadis->Fill(eta);
-	  _phidis->Fill(phi);
+	  //_dcaz->Fill(DCAZ);
+	  //_dcaxy->Fill(DCAXY);
+	  //_etadis->Fill(eta);
+	  //_phidis->Fill(phi);
 	  //===================================
 	  //*************************************************