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44dbae42 | 1 | #ifndef ALITRDCALPIDLQ_H |
2 | #define ALITRDCALPIDLQ_H | |
3 | ||
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
7 | /* $Id$ */ | |
8 | ||
9 | //////////////////////////////////////////////////////////////////////////// | |
10 | // // | |
11 | // PID distributions for the LQ method // | |
12 | // // | |
13 | // Author: // | |
14 | // Alex Bercuci <A.Bercuci@gsi.de> // | |
15 | // // | |
16 | //////////////////////////////////////////////////////////////////////////// | |
17 | ||
9ded305e | 18 | #ifndef ALITRDCALPID_H |
44dbae42 | 19 | #include "AliTRDCalPID.h" |
9ded305e | 20 | #endif |
21 | #ifndef ROOT_TMath | |
22 | #include "TMath.h" | |
23 | #endif | |
44dbae42 | 24 | |
25 | class AliTRDCalPIDLQ : public AliTRDCalPID | |
26 | { | |
9ded305e | 27 | public: |
28 | enum ETRDCalPIDLQ { | |
29 | kNLength = 4 // No of bins for tracklet length discretization | |
30 | ,kNN2LQtransition = 4 // index of NN slices where first LQ slice ends | |
44dbae42 | 31 | }; |
32 | ||
33 | AliTRDCalPIDLQ(); | |
34 | AliTRDCalPIDLQ(const Text_t *name, const Text_t *title); | |
9ded305e | 35 | virtual ~AliTRDCalPIDLQ(){}; |
44dbae42 | 36 | |
9ded305e | 37 | inline static Bool_t CookdEdx(const Float_t * const dedx, Double_t *x); |
38 | TObject* GetModel(Int_t ip, Int_t iType, Int_t iPlane) const; | |
39 | static Double_t GetLength(Int_t il) { return (il<0 || il>=kNLength) ? -1. : fgTrackSegLength[il]; } | |
40 | inline static Int_t GetModelID(Int_t mom, Int_t spec, Int_t ii=-1); | |
41 | Double_t GetProbability(Int_t spec, Float_t mom | |
1fcc78b7 | 42 | , const Float_t * const dedx |
44dbae42 | 43 | , Float_t length, Int_t plane) const; |
9ded305e | 44 | Bool_t LoadReferences(Char_t* refFile); |
44dbae42 | 45 | |
9ded305e | 46 | protected: |
2e32a5ae | 47 | static Float_t fgTrackSegLength[kNLength]; // Track segment lengths |
48 | ||
9ded305e | 49 | private: |
44dbae42 | 50 | AliTRDCalPIDLQ(const AliTRDCalPIDLQ& pd); |
51 | AliTRDCalPIDLQ& operator=(const AliTRDCalPIDLQ &c); | |
9ded305e | 52 | void Init(); |
44dbae42 | 53 | |
2e32a5ae | 54 | ClassDef(AliTRDCalPIDLQ, 2) // LQ PID reference manager |
44dbae42 | 55 | }; |
9ded305e | 56 | |
57 | //_________________________________________________________________________ | |
58 | inline Int_t AliTRDCalPIDLQ::GetModelID(Int_t mom, Int_t spec, Int_t /*ii*/) | |
59 | { | |
60 | // Returns the ID of the PDF distribution | |
61 | // 5 species * 11 momentum ranges | |
62 | ||
63 | return spec * AliTRDCalPID::kNMom + mom; | |
64 | } | |
65 | ||
66 | //_________________________________________________________________________ | |
67 | inline Bool_t AliTRDCalPIDLQ::CookdEdx(const Float_t * const dedx, Double_t *x) | |
68 | { | |
69 | // Convert NN dEdx slices to the representation used by LQ | |
70 | ||
71 | x[0]=0.;x[1]=0.; | |
72 | for(Int_t islice=AliTRDCalPID::kNSlicesNN; islice--;){ | |
73 | Int_t jslice = islice>kNN2LQtransition; | |
74 | x[jslice]+=dedx[islice]; | |
75 | } | |
76 | ||
77 | // check data integrity | |
78 | if(x[0]<1.e-30) return kFALSE; | |
79 | if(x[1]<1.e-30) return kFALSE; | |
80 | ||
81 | x[0] = TMath::Log(x[0]); | |
82 | x[1] = TMath::Log(x[1]); | |
83 | return kTRUE; | |
84 | } | |
85 | ||
44dbae42 | 86 | #endif |
87 |