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04fa961a | 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 "AliITSLoader.h" | |
28 | #include "AliV0vertex.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 | //_____________________________________________________________________________ | |
44 | void AliMonitorV0s::CreateHistos(TFolder* folder) | |
45 | { | |
46 | // create the V0s monitor histograms | |
47 | ||
48 | fFolder = folder->AddFolder("V0s", "V0s"); | |
49 | ||
50 | fRadius = CreateHisto1("Radius", "radius of V0 vertices", | |
51 | 90, 0., 3., "r_{xy} [cm]", | |
52 | "#Delta N/N", AliMonitorHisto::kNormEvents); | |
53 | ||
54 | fMassK0 = CreateHisto1("MassK0", "invariant mass of K^{0} candidates", | |
55 | 50, 0.4, 0.6, "m_{#pi^{+}#pi^{-}} [GeV/c^{2}]", | |
56 | "#Delta N/N", AliMonitorHisto::kNormEvents); | |
57 | ||
58 | fMassLambda = CreateHisto1("MassLambda", | |
59 | "invariant mass of #Lambda candidates", | |
60 | 50, 1.0, 1.2, "m_{p#pi^{-}} [GeV/c^{2}]", | |
61 | "#Delta N/N", AliMonitorHisto::kNormEvents); | |
62 | ||
63 | fMassAntiLambda = CreateHisto1("MassAntiLambda", | |
64 | "invariant mass of #bar{#Lambda} candidates", | |
65 | 50, 1.0, 1.2, | |
66 | "m_{#bar{p}#pi^{+}} [GeV/c^{2}]", | |
67 | "#Delta N/N", AliMonitorHisto::kNormEvents); | |
68 | } | |
69 | ||
70 | ||
71 | //_____________________________________________________________________________ | |
72 | void AliMonitorV0s::FillHistos(AliRunLoader* runLoader, | |
73 | AliRawReader*) | |
74 | { | |
75 | // fill the TPC-ITS correlation monitor histogrms | |
76 | ||
77 | AliITSLoader* itsLoader = (AliITSLoader*) runLoader->GetLoader("ITSLoader"); | |
78 | if (!itsLoader) return; | |
79 | ||
80 | itsLoader->LoadV0s(); | |
81 | TTree* v0s = itsLoader->TreeV0(); | |
82 | if (!v0s) return; | |
83 | AliV0vertex* vertex = new AliV0vertex; | |
84 | v0s->SetBranchAddress("vertices", &vertex); | |
85 | ||
86 | for (Int_t i = 0; i < v0s->GetEntries(); i++) { | |
87 | v0s->GetEntry(i); | |
88 | Double_t x, y, z; | |
89 | vertex->GetXYZ(x, y, z); | |
90 | fRadius->Fill(TMath::Sqrt(x*x + y*y)); | |
91 | vertex->ChangeMassHypothesis(kK0Short); | |
92 | fMassK0->Fill(vertex->GetEffMass()); | |
93 | vertex->ChangeMassHypothesis(kLambda0); | |
94 | fMassLambda->Fill(vertex->GetEffMass()); | |
95 | vertex->ChangeMassHypothesis(kLambda0Bar); | |
96 | fMassAntiLambda->Fill(vertex->GetEffMass()); | |
97 | } | |
98 | ||
99 | delete vertex; | |
100 | itsLoader->UnloadV0s(); | |
101 | } |