4fc6d88e1594cc145d28370b0602f6756f05b3f2
[u/mrichter/AliRoot.git] / 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 }