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76ce4b5b 1/***************************************************************************
2 *
3 * $Id$
4 *
5 * Author: CLHEP (see below)
6 ***************************************************************************
7 *
8 * Description: Taken as-is from CLHEP.
9 * Modified original CVS-Id to retain version info.
10 ***************************************************************************
11 *
12 * $Log$
13 * Revision 1.1.1.1 2007/04/25 15:38:41 panos
14 * Importing the HBT code dir
15 *
16 * Revision 1.1.1.1 2007/03/07 10:14:49 mchojnacki
17 * First version on CVS
18 *
19 * Revision 1.2 1999/02/22 16:52:47 didenko
20 * updates from Gene
21 *
22 * Revision 1.1 1999/01/30 03:58:59 fisyak
23 * Root Version of StarClassLibrary
24 *
25 * Revision 1.1 1999/01/23 00:27:34 ullrich
26 * Initial Revision
27 *
28 **************************************************************************/
29
30#ifndef HEP_PHYSICAL_CONSTANTS_H
31#define HEP_PHYSICAL_CONSTANTS_H
32
33#include "SystemOfUnits.h"
34
35#ifndef ST_NO_NAMESPACES
36using namespace std;
37using namespace units;
38#endif
39
40#include <math.h>
41#include <cmath>
42
43/*
44//
45#ifndef M_PI
46#define M_PI 3.14159265358979312
47#endif
48//
49//#ifdef MACOSX
50//extern const double pi; // from <math.h>
51//#else
52static const double pi = M_PI; // from <math.h>
53//#endif
54static const double twopi = 2*pi;
55static const double halfpi = pi/2;
56static const double pi2 = pi*pi;
57
58//
59//
60//
61static const double Avogadro = 6.0221367e+23/mole;
62*/
63//
64// c = 299.792458 mm/ns
65// c^2 = 898.7404 (mm/ns)^2
66//
67static const double kCLight = 2.99792458e+8 * meter/second;
68static const double kCSquared = kCLight * kCLight;
69/*
70//
71// h = 4.13566e-12 MeV*ns
72// hbar = 6.58212e-13 MeV*ns
73// hbarc = 197.32705e-12 MeV*mm
74//
75static const double h_Planck = 6.6260755e-34 * joule*second;
76static const double hbar_Planck = h_Planck/twopi;
77static const double hbarc = hbar_Planck * kCLight;
78static const double hbarcSquared = hbarc * hbarc;
79
80//
81//
82//
83static const double electron_charge = - eplus; // see SystemOfUnits.h
84static const double e_squared = eplus * eplus;
85
86*/
87//
88// amu_c2 - atomic equivalent mass unit
89// amu - atomic mass unit
90//
91static const double kElectronMassC2 = 0.51099906 * MeV;
92static const double kProtonMassC2 = 938.27231 * MeV;
93static const double kNeutronMassC2 = 939.56563 * MeV;
94static const double kAmuC2 = 931.49432 * MeV;
95//static const double amu = kAmuC2/cSquared;
96
97static const double kKaon0ShortMassC2 = 497.672 * MeV;
98static const double kPionPlusMassC2 = 139.5700 * MeV;
99static const double kPionMinusMassC2 = 139.5700 * MeV;
100static const double kLambdaMassC2 = 1115.684 * MeV;
101static const double kAntiLambdaMassC2 = 1115.684 * MeV;
102static const double kXiMinusMassC2 = 1321.32 * MeV;
103
104/*
105//
106// permeability of free space mu0 = 2.01334e-16 Mev*(ns*eplus)^2/mm
107// permittivity of free space epsil0 = 5.52636e+10 eplus^2/(MeV*mm)
108//
109static const double mu0 = 4*pi*1.e-7 * henry/meter;
110static const double epsilon0 = 1./(cSquared*mu0);
111
112//
113// electromagnetic coupling = 1.43996e-12 MeV*mm/(eplus^2)
114//
115static const double elm_coupling = e_squared/(4*pi*epsilon0);
116static const double fine_structure_const = elm_coupling/hbarc;
117static const double classic_electr_radius = elm_coupling/kElectronMassC2;
118static const double electron_Compton_length = hbarc/kElectronMassC2;
119static const double Bohr_radius = electron_Compton_length/fine_structure_const;
120
121static const double alpha_rcl2 = fine_structure_const
122 *classic_electr_radius
123 *classic_electr_radius;
124
125static const double twopi_mc2_rcl2 = twopi*kElectronMassC2
126 *classic_electr_radius
127 *classic_electr_radius;
128//
129//
130//
131static const double k_Boltzmann = 8.617385e-11 * MeV/kelvin;
132
133//
134//
135//
136static const double STP_Temperature = 273.15*kelvin;
137static const double STP_Pressure = 1.*atmosphere;
138static const double kGasThreshold = 1.e-2*gram/centimeter3;
139*/
140
141#endif /* HEP_PHYSICAL_CONSTANTS_H */
142
143
144
145
146