PWGLF/STRANGENESS/Cascades/AliPPVsMultUtils.cxx

   1 /*****************************************************************
   2
   3  General utility class for doing pp vs multiplicity studies
   4
   5  --- Functionality being added on demand.
   6
   7  --- Please report any bugs, comments, suggestions to:
   8  david.dobrigkeit.chinellato@cern.ch
   9
  10  *****************************************************************/
  11
  12 #include "AliVEvent.h"
  13 #include "AliESDEvent.h"
  14 #include "AliAODEvent.h"
  15 #include "AliVVertex.h"
  16 #include "AliLog.h"
  17 #include "AliAODVertex.h"
  18 #include "AliVTrack.h"
  19 #include "AliVEvent.h"
  20 #include <TMatrixDSym.h>
  21 #include <TMath.h>
  22 #include "AliESDUtils.h"
  23 #include "AliPPVsMultUtils.h"
  24 #include <TFile.h>
  25
  26
  27 ClassImp(AliPPVsMultUtils)
  28
  29 //______________________________________________________________________
  30 AliPPVsMultUtils::AliPPVsMultUtils():TObject(),
  31 fRunNumber(0),
  32 fBoundaryHisto_V0M(0),
  33 fBoundaryHisto_V0A(0),
  34 fBoundaryHisto_V0C(0),
  35 fBoundaryHisto_V0MEq(0),
  36 fBoundaryHisto_V0AEq(0),
  37 fBoundaryHisto_V0CEq(0)
  38 {
  39     // Default contructor
  40 }
  41
  42
  43 //_____________________________________________________________________________
  44 AliPPVsMultUtils::AliPPVsMultUtils(const AliPPVsMultUtils &c) : TObject(c),
  45 fRunNumber(0),
  46 fBoundaryHisto_V0M(0),
  47 fBoundaryHisto_V0A(0),
  48 fBoundaryHisto_V0C(0),
  49 fBoundaryHisto_V0MEq(0),
  50 fBoundaryHisto_V0AEq(0),
  51 fBoundaryHisto_V0CEq(0)
  52 {
  53     //
  54     // copy constructor - untested
  55     //
  56     ((AliPPVsMultUtils &) c).Copy(*this);
  57 }
  58
  59 //_____________________________________________________________________________
  60 AliPPVsMultUtils &AliPPVsMultUtils::operator=(const AliPPVsMultUtils &c)
  61 {
  62     //
  63     // Assignment operator - untested
  64     //
  65
  66     if (this != &c) ((AliPPVsMultUtils &) c).Copy(*this);
  67     return *this;
  68 }
  69
  70 //______________________________________________________________________
  71 Float_t AliPPVsMultUtils::GetMultiplicityQuantile(AliESDEvent *event, TString lMethod = "V0M")
  72 {
  73     Int_t lRequestedRunNumber = event->GetRunNumber();
  74     if( lRequestedRunNumber != fRunNumber ) LoadCalibration( lRequestedRunNumber );
  75
  76     Float_t lreturnval = -1;
  77
  78     //Get VZERO Information for multiplicity later
  79     AliVVZERO* esdV0 = event->GetVZEROData();
  80     if (!esdV0) {
  81         AliError("AliVVZERO not available");
  82         return -1;
  83     }
  84
  85     // VZERO PART
  86     Float_t  multV0A  = 0;            //  multiplicity from V0 reco side A
  87     Float_t  multV0C  = 0;            //  multiplicity from V0 reco side C
  88     Float_t  multV0AEq  = 0;          //  multiplicity from V0 reco side A
  89     Float_t  multV0CEq  = 0;          //  multiplicity from V0 reco side C
  90     Float_t  multV0ACorr  = 0;            //  multiplicity from V0 reco side A
  91     Float_t  multV0CCorr  = 0;            //  multiplicity from V0 reco side C
  92
  93     //Non-Equalized Signal: copy of multV0ACorr and multV0CCorr from AliCentralitySelectionTask
  94     //Getters for uncorrected multiplicity
  95     multV0A=esdV0->GetMTotV0A();
  96     multV0C=esdV0->GetMTotV0C();
  97     const AliESDVertex *lPrimarySPDVtx         = event->GetPrimaryVertexSPD();
  98
  99     //Get Z vertex position of SPD vertex (why not Tracking if available?)
 100     Float_t zvtx = lPrimarySPDVtx->GetZ();
 101
 102     //Acquire Corrected multV0A
 103     multV0ACorr = AliESDUtils::GetCorrV0A(multV0A,zvtx);
 104     multV0CCorr = AliESDUtils::GetCorrV0C(multV0C,zvtx);
 105
 106     // Equalized signals // From AliCentralitySelectionTask // Updated
 107     for(Int_t iCh = 32; iCh < 64; ++iCh) {
 108         Double_t mult = event->GetVZEROEqMultiplicity(iCh);
 109         multV0AEq += mult;
 110     }
 111     for(Int_t iCh = 0; iCh < 32; ++iCh) {
 112         Double_t mult = event->GetVZEROEqMultiplicity(iCh);
 113         multV0CEq += mult;
 114     }
 115
 116     if ( lMethod == "V0M" ) lreturnval =
 117         fBoundaryHisto_V0M -> GetBinContent( fBoundaryHisto_V0M->FindBin(multV0ACorr+multV0CCorr) );
 118     if ( lMethod == "V0A" ) lreturnval =
 119         fBoundaryHisto_V0A -> GetBinContent( fBoundaryHisto_V0A->FindBin(multV0ACorr) );
 120     if ( lMethod == "V0C" ) lreturnval =
 121         fBoundaryHisto_V0C -> GetBinContent( fBoundaryHisto_V0C->FindBin(multV0CCorr) );
 122     //equalized
 123     if ( lMethod == "V0MEq" ) lreturnval =
 124         fBoundaryHisto_V0MEq -> GetBinContent( fBoundaryHisto_V0MEq->FindBin(multV0AEq+multV0CEq) );
 125     if ( lMethod == "V0AEq" ) lreturnval =
 126         fBoundaryHisto_V0AEq -> GetBinContent( fBoundaryHisto_V0AEq->FindBin(multV0AEq) );
 127     if ( lMethod == "V0CEq" ) lreturnval =
 128         fBoundaryHisto_V0CEq -> GetBinContent( fBoundaryHisto_V0CEq->FindBin(multV0CEq) );
 129
 130     return lreturnval;
 131 }
 132
 133 //______________________________________________________________________
 134 Bool_t AliPPVsMultUtils::LoadCalibration(Int_t lLoadThisCalibration)
 135 //To be called if starting analysis on a new run
 136 {
 137     AliInfo(Form( "Loading calibration file for run %i",lLoadThisCalibration) );
 138     TFile *lCalibFile_V0M = 0x0;
 139     TFile *lCalibFile_V0A = 0x0;
 140     TFile *lCalibFile_V0C = 0x0;
 141     TFile *lCalibFile_V0MEq = 0x0;
 142     TFile *lCalibFile_V0AEq = 0x0;
 143     TFile *lCalibFile_V0CEq = 0x0;
 144
 145     lCalibFile_V0M = TFile::Open("$ALICE_ROOT/PWGLF/STRANGENESS/Cascades/corrections/calibration_V0M.root");
 146     lCalibFile_V0A = TFile::Open("$ALICE_ROOT/PWGLF/STRANGENESS/Cascades/corrections/calibration_V0A.root");
 147     lCalibFile_V0C = TFile::Open("$ALICE_ROOT/PWGLF/STRANGENESS/Cascades/corrections/calibration_V0C.root");
 148     lCalibFile_V0MEq = TFile::Open("$ALICE_ROOT/PWGLF/STRANGENESS/Cascades/corrections/calibration_V0MEq.root");
 149     lCalibFile_V0AEq = TFile::Open("$ALICE_ROOT/PWGLF/STRANGENESS/Cascades/corrections/calibration_V0AEq.root");
 150     lCalibFile_V0CEq = TFile::Open("$ALICE_ROOT/PWGLF/STRANGENESS/Cascades/corrections/calibration_V0CEq.root");
 151
 152     fBoundaryHisto_V0M   = (TH1F*)lCalibFile_V0M  -> Get(Form("histocalib%i",fRunNumber));
 153     fBoundaryHisto_V0A   = (TH1F*)lCalibFile_V0A  -> Get(Form("histocalib%i",fRunNumber));
 154     fBoundaryHisto_V0C   = (TH1F*)lCalibFile_V0C  -> Get(Form("histocalib%i",fRunNumber));
 155     fBoundaryHisto_V0MEq   = (TH1F*)lCalibFile_V0MEq  -> Get(Form("histocalib%i",fRunNumber));
 156     fBoundaryHisto_V0AEq   = (TH1F*)lCalibFile_V0AEq  -> Get(Form("histocalib%i",fRunNumber));
 157     fBoundaryHisto_V0CEq   = (TH1F*)lCalibFile_V0CEq  -> Get(Form("histocalib%i",fRunNumber));
 158
 159     if ( !fBoundaryHisto_V0M   || !fBoundaryHisto_V0A   || !fBoundaryHisto_V0C ||
 160         !fBoundaryHisto_V0MEq || !fBoundaryHisto_V0AEq || !fBoundaryHisto_V0CEq ){
 161         AliFatal(Form("No calibration for run %i exists at the moment!",fRunNumber));
 162         return kFALSE; //return denial
 163     }
 164
 165     if( lCalibFile_V0M ) lCalibFile_V0M->Close();
 166     if( lCalibFile_V0A ) lCalibFile_V0A->Close();
 167     if( lCalibFile_V0C ) lCalibFile_V0C->Close();
 168     if( lCalibFile_V0MEq ) lCalibFile_V0MEq->Close();
 169     if( lCalibFile_V0AEq ) lCalibFile_V0AEq->Close();
 170     if( lCalibFile_V0CEq ) lCalibFile_V0CEq->Close();
 171
 172     fRunNumber = lLoadThisCalibration; //Loaded!
 173     return kTRUE;
 174 }