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1 | #ifndef ALIITSPIDRESPONSE_H | |
2 | #define ALIITSPIDRESPONSE_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 | // ITS PID response class | |
10 | // | |
11 | // | |
12 | //------------------------------------------------------- | |
13 | //#include <Rtypes.h> | |
14 | #include <TObject.h> | |
15 | #include "AliPID.h" | |
16 | ||
17 | class AliITSPIDResponse : public TObject { | |
18 | ||
19 | public: | |
20 | AliITSPIDResponse(Bool_t isMC=kFALSE); | |
21 | AliITSPIDResponse(Double_t *param); | |
22 | ~AliITSPIDResponse() {} | |
23 | ||
24 | void SetBetheBlochParamsITSTPC(Double_t* param){ | |
25 | for(Int_t iPar=0; iPar<5; iPar++) fBBtpcits[iPar]=param[iPar]; | |
26 | } | |
27 | void SetBetheBlochParamsITSsa(Double_t* param){ | |
28 | for(Int_t iPar=0; iPar<5; iPar++) fBBsa[iPar]=param[iPar]; | |
29 | } | |
30 | ||
31 | Double_t BetheAleph(Double_t p,Double_t mass) const; | |
32 | Double_t Bethe(Double_t p, Double_t mass, Bool_t iSA=kFALSE) const; | |
33 | Double_t GetResolution(Double_t bethe, Int_t nPtsForPid=4, Bool_t isSA=kFALSE) const; | |
34 | void GetITSProbabilities(Float_t mom, Double_t qclu[4], Double_t condprobfun[AliPID::kSPECIES]) const; | |
35 | Float_t GetNumberOfSigmas(Float_t mom, Float_t signal, AliPID::EParticleType type, Int_t nPtsForPid=4, Bool_t isSA=kFALSE) const { | |
36 | Float_t bethe = Bethe(mom,AliPID::ParticleMass(type),isSA); | |
37 | return (signal - bethe)/GetResolution(bethe,nPtsForPid,isSA); | |
38 | } | |
39 | Int_t GetParticleIdFromdEdxVsP(Float_t mom, Float_t signal, Bool_t isSA=kFALSE) const; | |
40 | ||
41 | private: | |
42 | ||
43 | ||
44 | // Data members for truncated mean method | |
45 | Float_t fRes; // relative dEdx resolution | |
46 | Double_t fKp1; // ALEPH BB param 1 | |
47 | Double_t fKp2; // ALEPH BB param 2 | |
48 | Double_t fKp3; // ALEPH BB param 3 | |
49 | Double_t fKp4; // ALEPH BB param 4 | |
50 | Double_t fKp5; // ALEPH BB param | |
51 | Double_t fBBsa[5]; // parameters of BB for SA tracks | |
52 | Double_t fBBtpcits[5]; // parameters of BB for TPC+ITS tracks | |
53 | Float_t fResolSA[5]; // resolutions vs. n. of SDD/SSD points | |
54 | Float_t fResolTPCITS[5]; // resolutions vs. n. of SDD/SSD points | |
55 | ||
56 | ClassDef(AliITSPIDResponse,2) // ITS PID class | |
57 | }; | |
58 | ||
59 | #endif | |
60 | ||
61 |