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2 | /************************************************************************** | |
3 | * This file is property of and copyright by the ALICE HLT Project * | |
4 | * All rights reserved. * | |
5 | * * | |
6 | * Primary Authors: Albin Gaignette | |
7 | * * | |
8 | * Permission to use, copy, modify and distribute this software and its * | |
9 | * documentation strictly for non-commercial purposes is hereby granted * | |
10 | * without fee, provided that the above copyright notice appears in all * | |
11 | * copies and that both the copyright notice and this permission notice * | |
12 | * appear in the supporting documentation. The authors make no claims * | |
13 | * about the suitability of this software for any purpose. It is * | |
14 | * provided "as is" without express or implied warranty. * | |
15 | **************************************************************************/ | |
16 | ||
17 | /** | |
87b87810 | 18 | * @file AliHLTPHOSHistoProdClusterEnergy |
19 | * @author Albin Gaignette & Svein Lindal | |
844d7fdd | 20 | * @date |
87b87810 | 21 | * @brief Produces histograms of cluster energy distributions |
844d7fdd | 22 | */ |
23 | ||
24 | // see header file for class documentation | |
25 | // or | |
26 | // refer to README to build package | |
27 | // or | |
28 | // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt | |
29 | ||
87b87810 | 30 | #include "AliHLTPHOSHistoProdClusterEnergy.h" |
844d7fdd | 31 | //#include "AliESDCaloCluster.h" |
32 | #include "TMath.h" | |
33 | ||
34 | #include "AliHLTCaloClusterDataStruct.h" | |
35 | #include "AliHLTCaloClusterReader.h" | |
36 | #include "TObjArray.h" | |
37 | //#include "TClonesArray.h" | |
38 | //#include <iostream> | |
39 | #include "TH1F.h" | |
87b87810 | 40 | #include "TH2F.h" |
844d7fdd | 41 | |
87b87810 | 42 | AliHLTPHOSHistoProdClusterEnergy::AliHLTPHOSHistoProdClusterEnergy() : |
844d7fdd | 43 | fClusterReader(NULL), |
87b87810 | 44 | fHistClusterEnergy(NULL), |
45 | fHistClusterEnergyVsNCells(NULL), | |
46 | fHistArrayPtr(NULL) | |
844d7fdd | 47 | { |
48 | // See header file for documentation | |
49 | fHistArrayPtr = new TObjArray; | |
50 | fClusterReader = new AliHLTCaloClusterReader(); | |
51 | ||
87b87810 | 52 | fHistClusterEnergy = new TH1F("fHistClusterEnergy", "Distribution of total energy in clusters", 200, 0, 1); |
53 | fHistClusterEnergy->GetXaxis()->SetTitle("E GeV"); | |
54 | fHistClusterEnergy->GetYaxis()->SetTitle("Number of counts"); | |
55 | fHistClusterEnergy->SetMarkerStyle(21); | |
56 | fHistArrayPtr->AddLast(fHistClusterEnergy); | |
57 | ||
58 | fHistClusterEnergyVsNCells = new TH2F("fHistClusterEnergyVsNCells", "Distribution of Energy vs Number of Cells in cluster", 200, 0, 200, 50, 0 , 50); | |
59 | fHistClusterEnergyVsNCells->GetXaxis()->SetTitle("Energy in cluster (GeV)"); | |
60 | fHistClusterEnergyVsNCells->GetYaxis()->SetTitle("Number of Cells in cluster"); | |
61 | fHistClusterEnergyVsNCells->SetMarkerStyle(21); | |
62 | fHistArrayPtr->AddLast(fHistClusterEnergyVsNCells); | |
63 | ||
64 | ||
844d7fdd | 65 | } |
66 | ||
87b87810 | 67 | AliHLTPHOSHistoProdClusterEnergy::~AliHLTPHOSHistoProdClusterEnergy() |
844d7fdd | 68 | { |
87b87810 | 69 | if(fHistClusterEnergy){ |
70 | delete fHistClusterEnergy; | |
71 | fHistClusterEnergy = 0; | |
844d7fdd | 72 | } |
73 | } | |
74 | ||
87b87810 | 75 | TObjArray* AliHLTPHOSHistoProdClusterEnergy::GetHistograms() |
844d7fdd | 76 | { |
77 | // See header file for documentation | |
78 | ||
79 | return fHistArrayPtr; | |
80 | } | |
81 | ||
87b87810 | 82 | Int_t AliHLTPHOSHistoProdClusterEnergy::DoEvent(AliHLTCaloClusterHeaderStruct* cHeader) { |
844d7fdd | 83 | |
84 | fClusterReader->SetMemory(cHeader); | |
85 | ||
86 | int ncls = cHeader->fNClusters; | |
87 | Float_t* cPos[ncls]; | |
88 | Float_t cEnergy[ncls]; | |
89 | ||
90 | AliHLTCaloClusterDataStruct* cluster; | |
91 | Int_t icls = 0; | |
92 | while ( ( cluster = fClusterReader->NextCluster() ) ) { | |
93 | ||
94 | cPos[icls] = cluster->fGlobalPos; | |
95 | cEnergy[icls] = cluster->fEnergy; | |
96 | ||
97 | icls++; | |
98 | } | |
99 | ||
100 | for(Int_t ipho = 0; ipho<(ncls-1); ipho++) { | |
101 | for(Int_t jpho = ipho+1 ; jpho<ncls ; jpho++) { | |
102 | // Calcul of the theta angle between two photons | |
103 | Double_t theta = (2* asin(0.5*TMath::Sqrt((cPos[ipho][0]-cPos[jpho][0])*(cPos[ipho][0]-cPos[jpho][0]) +(cPos[ipho][1]-cPos[jpho][1])*(cPos[ipho][1]-cPos[jpho][1]))/460)); | |
104 | ||
105 | // Calcul of the mass m of the pion | |
106 | Double_t m =(TMath::Sqrt(2 * cEnergy[ipho]* cEnergy[jpho]*(1-TMath::Cos(theta)))); | |
107 | ||
87b87810 | 108 | fHistClusterEnergy->Fill(m); |
844d7fdd | 109 | } |
110 | } | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | ||
116 | ||
117 |