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1 | #ifndef ALIITSMULTRECONSTRUCTOR_H | |
2 | #define ALIITSMULTRECONSTRUCTOR_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
8 | ///////////////////////////////////////////////////////////////////////// | |
9 | // | |
10 | // AliITSMultReconstructor - find clusters in the pixels (theta and | |
11 | // phi) and tracklets. | |
12 | // | |
13 | // These can be used to extract charged particles multiplcicity from the ITS. | |
14 | // | |
15 | // A tracklet consist of two ITS clusters, one in the first pixel | |
16 | // layer and one in the second. The clusters are associates if the | |
17 | // differencies in Phi (azimuth) and Zeta (longitudinal) are inside | |
18 | // a fiducial volume. In case of multiple candidates it is selected the | |
19 | // candidate with minimum distance in Phi. | |
20 | // The boolean fOnlyOneTrackletPerC2 allows to control if two clusters | |
21 | // in layer 2 can be associated to the same cluster in layer 1 or not. | |
22 | // | |
23 | ///////////////////////////////////////////////////////////////////////// | |
24 | ||
25 | #include "TObject.h" | |
26 | ||
27 | class TTree; | |
28 | class TH1F; | |
29 | class TH2F; | |
30 | ||
31 | class AliITSgeom; | |
32 | ||
33 | class AliITSMultReconstructor : public TObject | |
34 | { | |
35 | public: | |
36 | AliITSMultReconstructor(); | |
37 | virtual ~AliITSMultReconstructor(); | |
38 | ||
39 | void Reconstruct(TTree* tree, Float_t* vtx, Float_t* vtxRes); | |
40 | void LoadClusterFiredChips(TTree* tree); | |
41 | ||
42 | void SetPhiWindow(Float_t w=0.08) {fPhiWindow=w;} | |
43 | void SetZetaWindow(Float_t w=1.) {fZetaWindow=w;} | |
44 | void SetOnlyOneTrackletPerC2(Bool_t b = kTRUE) {fOnlyOneTrackletPerC2 = b;} | |
45 | ||
46 | Int_t GetNClustersLayer1() const {return fNClustersLay1;} | |
47 | Int_t GetNClustersLayer2() const {return fNClustersLay2;} | |
48 | Int_t GetNTracklets() const {return fNTracklets;} | |
49 | Int_t GetNSingleClusters() const {return fNSingleCluster;} | |
50 | Short_t GetNFiredChips(Int_t layer) const {return fNFiredChips[layer];} | |
51 | ||
52 | Float_t* GetClusterLayer1(Int_t n) {return fClustersLay1[n];} | |
53 | Float_t* GetClusterLayer2(Int_t n) {return fClustersLay2[n];} | |
54 | Float_t* GetTracklet(Int_t n) {return fTracklets[n];} | |
55 | Float_t* GetCluster(Int_t n) {return fSClusters[n];} | |
56 | ||
57 | void SetHistOn(Bool_t b=kFALSE) {fHistOn=b;} | |
58 | void SaveHists(); | |
59 | ||
60 | protected: | |
61 | AliITSMultReconstructor(const AliITSMultReconstructor& mr); | |
62 | AliITSMultReconstructor& operator=(const AliITSMultReconstructor& mr); | |
63 | ||
64 | ||
65 | Float_t** fClustersLay1; // clusters in the 1st layer of ITS | |
66 | Float_t** fClustersLay2; // clusters in the 2nd layer of ITS | |
67 | Float_t** fTracklets; // tracklets | |
68 | Float_t** fSClusters; // single clusters (unassociated) | |
69 | Bool_t* fAssociationFlag; // flag for the associations | |
70 | ||
71 | Int_t fNClustersLay1; // Number of clusters (Layer1) | |
72 | Int_t fNClustersLay2; // Number of clusters (Layer2) | |
73 | Int_t fNTracklets; // Number of tracklets | |
74 | Int_t fNSingleCluster; // Number of unassociated clusters | |
75 | Short_t fNFiredChips[2]; // Number of fired chips in the two SPD layers | |
76 | ||
77 | Float_t fPhiWindow; // Search window in phi | |
78 | Float_t fZetaWindow; // SEarch window in eta | |
79 | ||
80 | Bool_t fOnlyOneTrackletPerC2; // only one tracklet per cluster in L. 2 | |
81 | ||
82 | Bool_t fHistOn; // Option to define and fill the histograms | |
83 | ||
84 | ||
85 | TH1F* fhClustersDPhiAcc; // Phi2 - Phi1 for tracklets | |
86 | TH1F* fhClustersDThetaAcc; // Theta2 - Theta1 for tracklets | |
87 | TH1F* fhClustersDZetaAcc; // z2 - z1projected for tracklets | |
88 | TH1F* fhClustersDPhiAll; // Phi2 - Phi1 all the combinations | |
89 | TH1F* fhClustersDThetaAll; // Theta2 - Theta1 all the combinations | |
90 | TH1F* fhClustersDZetaAll; // z2 - z1projected all the combinations | |
91 | ||
92 | TH2F* fhDPhiVsDThetaAll; // 2D plot for all the combinations | |
93 | TH2F* fhDPhiVsDThetaAcc; // same plot for tracklets | |
94 | TH2F* fhDPhiVsDZetaAll; // 2d plot for all the combination | |
95 | TH2F* fhDPhiVsDZetaAcc; // same plot for tracklets | |
96 | ||
97 | TH1F* fhetaTracklets; // Pseudorapidity distr. for tracklets | |
98 | TH1F* fhphiTracklets; // Azimuthal (Phi) distr. for tracklets | |
99 | TH1F* fhetaClustersLay1; // Pseudorapidity distr. for Clusters L. 1 | |
100 | TH1F* fhphiClustersLay1; // Azimuthal (Phi) distr. for Clusters L. 1 | |
101 | ||
102 | ||
103 | void LoadClusterArrays(TTree* tree); | |
104 | ||
105 | ClassDef(AliITSMultReconstructor,3) | |
106 | }; | |
107 | ||
108 | #endif |