fixed a bug in rescaling v0s, cleaning up macro for neutral energy contribution with...
[u/mrichter/AliRoot.git] / STEER / AliTPCPIDResponse.h
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10d100d4 1#ifndef ALITPCPIDRESPONSE_H
2#define ALITPCPIDRESPONSE_H
8c6a71ab 3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6//-------------------------------------------------------
7// TPC PID class
8// A very naive design... Should be made better by the detector experts...
9// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
aea7a46d 10// With many additions and modifications suggested by
11// Alexander Kalweit, GSI, alexander.philipp.kalweit@cern.ch
12// Dariusz Miskowiec, GSI, D.Miskowiec@gsi.de
8c6a71ab 13//-------------------------------------------------------
14#include <Rtypes.h>
15
aea7a46d 16#include "AliPID.h"
17
10d100d4 18class AliTPCPIDResponse {
8c6a71ab 19public:
10d100d4 20 AliTPCPIDResponse();
21 AliTPCPIDResponse(Double_t *param);
22 virtual ~AliTPCPIDResponse() {}
23 void SetSigma(Float_t res0, Float_t resN2);
aea7a46d 24 void SetBetheBlochParameters(Double_t kp1,
25 Double_t kp2,
26 Double_t kp3,
27 Double_t kp4,
28 Double_t kp5
29 );
10d100d4 30 void SetMip(Float_t mip) { fMIP = mip; } // Set overall normalisation; mean dE/dx for MIP
aea7a46d 31 Double_t Bethe(Double_t bg) const;
32
aea7a46d 33
10d100d4 34 Double_t GetExpectedSignal(const Float_t mom,
aea7a46d 35 AliPID::EParticleType n=AliPID::kKaon) const;
10d100d4 36 Double_t GetExpectedSigma(const Float_t mom, const Int_t nPoints,
aea7a46d 37 AliPID::EParticleType n=AliPID::kKaon) const;
10d100d4 38 Float_t GetNumberOfSigmas(const Float_t mom, const Float_t dEdx,
39 const Int_t nPoints,
40 AliPID::EParticleType n=AliPID::kKaon) const {
41
42 Double_t bethe=GetExpectedSignal(mom,n);
43 Double_t sigma=GetExpectedSigma(mom,nPoints,n);
44 return (dEdx-bethe)/sigma;
45 }
aea7a46d 46
10d100d4 47 Double_t GetMIP() const { return fMIP;}
8c6a71ab 48private:
10d100d4 49 Float_t fMIP; // dEdx for MIP
50 Float_t fRes0; // relative dEdx resolution rel sigma = fRes0*sqrt(1+fResN2/npoint)
51 Float_t fResN2; // relative Npoint dependence rel sigma = fRes0*sqrt(1+fResN2/npoint)
aea7a46d 52
53 Double_t fKp1; // Parameters
54 Double_t fKp2; // of
55 Double_t fKp3; // the ALEPH
56 Double_t fKp4; // Bethe-Bloch
57 Double_t fKp5; // formula
58
10d100d4 59 ClassDef(AliTPCPIDResponse,2) // TPC PID class
8c6a71ab 60};
61
62#endif
63
64