MONITOR/AliMonitorV0s.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 ///////////////////////////////////////////////////////////////////////////////
  19 //                                                                           //
  20 //  This class creates and fills the monitor histograms for V0s              //
  21 //                                                                           //
  22 ///////////////////////////////////////////////////////////////////////////////
  23
  24
  25 #include "AliMonitorV0s.h"
  26 #include "AliMonitorHisto.h"
  27 #include "AliESD.h"
  28 #include <TFolder.h>
  29 #include <TPDGCode.h>
  30
  31
  32 ClassImp(AliMonitorV0s)
  33
  34
  35 //_____________________________________________________________________________
  36 AliMonitorV0s::AliMonitorV0s()
  37 {
  38 // create a monitor object for V0s
  39
  40 }
  41
  42 //_____________________________________________________________________________
  43 AliMonitorV0s::AliMonitorV0s(const AliMonitorV0s& monitor) :
  44   AliMonitor(monitor)
  45 {
  46   Fatal("AliMonitorV0s", "copy constructor not implemented");
  47 }
  48
  49 //_____________________________________________________________________________
  50 AliMonitorV0s& AliMonitorV0s::operator = (const AliMonitorV0s& /*monitor*/)
  51 {
  52   Fatal("operator =", "assignment operator not implemented");
  53   return *this;
  54 }
  55
  56
  57 //_____________________________________________________________________________
  58 void AliMonitorV0s::CreateHistos(TFolder* folder)
  59 {
  60 // create the V0s monitor histograms
  61
  62   fFolder = folder->AddFolder("V0s", "V0s");
  63
  64   fRadius = CreateHisto1("Radius", "radius of V0 vertices",
  65                          90, 0., 3., "r_{xy} [cm]",
  66                          "#Delta N/N", AliMonitorHisto::kNormEvents);
  67
  68   fMassK0 = CreateHisto1("MassK0", "invariant mass of K^{0} candidates",
  69                          50, 0.4, 0.6, "m_{#pi^{+}#pi^{-}} [GeV/c^{2}]",
  70                          "#Delta N/N", AliMonitorHisto::kNormEvents);
  71
  72   fMassLambda = CreateHisto1("MassLambda",
  73                              "invariant mass of #Lambda candidates",
  74                              50, 1.0, 1.2, "m_{p#pi^{-}} [GeV/c^{2}]",
  75                              "#Delta N/N", AliMonitorHisto::kNormEvents);
  76
  77   fMassAntiLambda = CreateHisto1("MassAntiLambda",
  78                                  "invariant mass of #bar{#Lambda} candidates",
  79                                  50, 1.0, 1.2,
  80                                  "m_{#bar{p}#pi^{+}} [GeV/c^{2}]",
  81                                  "#Delta N/N", AliMonitorHisto::kNormEvents);
  82 }
  83
  84
  85 //_____________________________________________________________________________
  86 void AliMonitorV0s::FillHistos(AliRunLoader* /*runLoader*/,
  87                                AliRawReader*, AliESD* esd)
  88 {
  89 // fill the V0s monitor histogrms
  90
  91   for (Int_t i = 0; i < esd->GetNumberOfV0s(); i++) {
  92     AliESDv0* v0 = esd->GetV0(i);
  93     if (!v0) continue;
  94     Double_t x, y, z;
  95     v0->GetXYZ(x, y, z);
  96     fRadius->Fill(TMath::Sqrt(x*x + y*y));
  97     v0->ChangeMassHypothesis(kK0Short);
  98     fMassK0->Fill(v0->GetEffMass());
  99     v0->ChangeMassHypothesis(kLambda0);
 100     fMassLambda->Fill(v0->GetEffMass());
 101     v0->ChangeMassHypothesis(kLambda0Bar);
 102     fMassAntiLambda->Fill(v0->GetEffMass());
 103   }
 104 }