1 #ifndef ALIGENPHOSLIB_H
2 #define ALIGENPHOSLIB_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
9 //======================================================================
10 // AliGenPHOSlib class contains parameterizations of the
11 // pion, kaon, eta, omega, etaprime, phi and baryon (proton,
12 // antiproton, neutron and anti-neutron) particles for the
13 // study of the neutral background in PHOS detector.
14 //======================================================================
22 enum constants{kPion, kPi0Flat, kKaon, kEta, kEtaFlat,kOmega, kEtaPrime, kPhi, kBaryon};
24 static Double_t PtPion(Double_t *px, Double_t *dummy);
25 static Double_t PtScal(Double_t pt, Int_t np);
26 static Double_t YPion( Double_t *py, Double_t *dummy);
27 static Int_t IpPion(TRandom* ran);
29 // pi0 Flat Distribution
30 static Double_t PtPi0Flat(Double_t *px, Double_t *dummy);
31 static Double_t YPi0Flat( Double_t *py, Double_t *dummy);
32 static Int_t IpPi0Flat(TRandom* ran);
35 static Double_t PtKaon(Double_t *px, Double_t *dummy);
36 static Double_t YKaon( Double_t *py, Double_t *dummy);
37 static Int_t IpKaon(TRandom* ran);
40 static Double_t PtEta(Double_t *px, Double_t *dummy);
41 static Double_t YEta( Double_t *py, Double_t *dummy);
42 static Int_t IpEta(TRandom *ran);
44 // etas Flat Distribution
45 static Double_t PtEtaFlat(Double_t *px, Double_t *dummy);
46 static Double_t YEtaFlat( Double_t *py, Double_t *dummy);
47 static Int_t IpEtaFlat(TRandom *ran);
50 static Double_t PtOmega(Double_t *px, Double_t *dummy);
51 static Double_t YOmega( Double_t *py, Double_t *dummy);
52 static Int_t IpOmega(TRandom *ran);
55 static Double_t PtEtaprime(Double_t *px, Double_t *dummy);
56 static Double_t YEtaprime( Double_t *py, Double_t *dummy);
57 static Int_t IpEtaprime(TRandom* ran);
60 static Double_t PtPhi(Double_t *px, Double_t *dummy);
61 static Double_t YPhi( Double_t *py, Double_t *dummy);
62 static Int_t IpPhi(TRandom* ran);
65 static Double_t PtBaryon(Double_t *px, Double_t *dummy);
66 static Double_t YBaryon( Double_t *py, Double_t *dummy);
67 static Int_t IpBaryon(TRandom *ran);
69 GenFunc GetPt(Int_t param, const char* tname=0) const;
70 GenFunc GetY (Int_t param, const char* tname=0) const;
71 GenFuncIp GetIp(Int_t param, const char* tname=0) const;
72 ClassDef(AliGenPHOSlib,0) // Library providing y and pT parameterisations