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 // Additional particle species simulation options has been added:
15 // Charged Pion, Charged Kaons, KLong Proton, Anti-Proton, Neutron,
16 // Anti-Neutron --> Changes made by Gustavo Conesa in November 2004
17 //======================================================================
25 enum constants{kPion, kChargedPion, kPi0Flat, kKaon, kChargedKaon, kKaon0L,
26 kEta, kEtaFlat,kOmega, kEtaPrime, kPhi,
27 kBaryon, kProton, kAProton, kNeutron, kANeutron};
29 static Double_t PtPion(Double_t *px, Double_t *dummy);
30 static Double_t PtScal(Double_t pt, Int_t np);
31 static Double_t YPion( Double_t *py, Double_t *dummy);
32 static Int_t IpPion(TRandom* ran);
33 static Int_t IpChargedPion(TRandom* ran);
35 // pi0 Flat Distribution
36 static Double_t PtPi0Flat(Double_t *px, Double_t *dummy);
37 static Double_t YPi0Flat( Double_t *py, Double_t *dummy);
38 static Int_t IpPi0Flat(TRandom* ran);
41 static Double_t PtKaon(Double_t *px, Double_t *dummy);
42 static Double_t YKaon( Double_t *py, Double_t *dummy);
43 static Int_t IpKaon(TRandom* ran);
44 static Int_t IpChargedKaon(TRandom* ran);
45 static Int_t IpKaon0L(TRandom* ran);
47 static Double_t PtEta(Double_t *px, Double_t *dummy);
48 static Double_t YEta( Double_t *py, Double_t *dummy);
49 static Int_t IpEta(TRandom *ran);
51 // etas Flat Distribution
52 static Double_t PtEtaFlat(Double_t *px, Double_t *dummy);
53 static Double_t YEtaFlat( Double_t *py, Double_t *dummy);
54 static Int_t IpEtaFlat(TRandom *ran);
57 static Double_t PtOmega(Double_t *px, Double_t *dummy);
58 static Double_t YOmega( Double_t *py, Double_t *dummy);
59 static Int_t IpOmega(TRandom *ran);
62 static Double_t PtEtaprime(Double_t *px, Double_t *dummy);
63 static Double_t YEtaprime( Double_t *py, Double_t *dummy);
64 static Int_t IpEtaprime(TRandom* ran);
67 static Double_t PtPhi(Double_t *px, Double_t *dummy);
68 static Double_t YPhi( Double_t *py, Double_t *dummy);
69 static Int_t IpPhi(TRandom* ran);
72 static Double_t PtBaryon(Double_t *px, Double_t *dummy);
73 static Double_t YBaryon( Double_t *py, Double_t *dummy);
74 static Int_t IpBaryon(TRandom *ran);
75 static Int_t IpProton(TRandom *ran);
76 static Int_t IpAProton(TRandom *ran);
77 static Int_t IpNeutron(TRandom *ran);
78 static Int_t IpANeutron(TRandom *ran);
79 GenFunc GetPt(Int_t param, const char* tname=0) const;
80 GenFunc GetY (Int_t param, const char* tname=0) const;
81 GenFuncIp GetIp(Int_t param, const char* tname=0) const;
83 ClassDef(AliGenPHOSlib,0) // Library providing y and pT parameterisations