1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // This class creates and fills the monitor histograms for V0s //
22 ///////////////////////////////////////////////////////////////////////////////
25 #include "AliMonitorV0s.h"
26 #include "AliMonitorHisto.h"
27 #include "AliESDEvent.h"
35 ClassImp(AliMonitorV0s)
38 //_____________________________________________________________________________
39 AliMonitorV0s::AliMonitorV0s():
46 // create a monitor object for V0s
50 //_____________________________________________________________________________
51 void AliMonitorV0s::CreateHistos(TFolder* folder)
53 // create the V0s monitor histograms
55 fFolder = folder->AddFolder("V0s", "V0s");
57 fRadius = CreateHisto1("Radius", "radius of V0 vertices",
58 90, 0., 3., "r_{xy} [cm]",
59 "#Delta N/N", AliMonitorHisto::kNormEvents);
61 fMassK0 = CreateHisto1("MassK0", "invariant mass of K^{0} candidates",
62 50, 0.4, 0.6, "m_{#pi^{+}#pi^{-}} [GeV/c^{2}]",
63 "#Delta N/N", AliMonitorHisto::kNormEvents);
65 fMassLambda = CreateHisto1("MassLambda",
66 "invariant mass of #Lambda candidates",
67 50, 1.0, 1.2, "m_{p#pi^{-}} [GeV/c^{2}]",
68 "#Delta N/N", AliMonitorHisto::kNormEvents);
70 fMassAntiLambda = CreateHisto1("MassAntiLambda",
71 "invariant mass of #bar{#Lambda} candidates",
73 "m_{#bar{p}#pi^{+}} [GeV/c^{2}]",
74 "#Delta N/N", AliMonitorHisto::kNormEvents);
78 //_____________________________________________________________________________
79 void AliMonitorV0s::FillHistos(AliRunLoader* /*runLoader*/,
80 AliRawReader*, AliESDEvent* esd)
82 // fill the V0s monitor histogrms
84 for (Int_t i = 0; i < esd->GetNumberOfV0s(); i++) {
85 AliESDv0* v0 = esd->GetV0(i);
89 fRadius->Fill(TMath::Sqrt(x*x + y*y));
90 v0->ChangeMassHypothesis(kK0Short);
91 fMassK0->Fill(v0->GetEffMass());
92 v0->ChangeMassHypothesis(kLambda0);
93 fMassLambda->Fill(v0->GetEffMass());
94 v0->ChangeMassHypothesis(kLambda0Bar);
95 fMassAntiLambda->Fill(v0->GetEffMass());