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Constants.hh File Reference
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Namespaces

namespace  Rivet

Variables

static const double pi = 3.14159265358979323846
static const double twopi = 2*pi
static const double halfpi = pi/2
static const double pi2 = pi*pi
static const double Avogadro = 6.0221367e+23/mole
static const double c_light = 2.99792458e+8 * m/s
static const double c_squared = c_light * c_light
static const double h_Planck = 6.6260755e-34 * joule*s
static const double hbar_Planck = h_Planck/twopi
static const double hbarc = hbar_Planck * c_light
static const double hbarc_squared = hbarc * hbarc
static const double electron_charge = - eplus
static const double e_squared = eplus * eplus
static const double electron_mass_c2 = 0.51099906 * MeV
static const double proton_mass_c2 = 938.27231 * MeV
static const double neutron_mass_c2 = 939.56563 * MeV
static const double amu_c2 = 931.49432 * MeV
static const double amu = amu_c2/c_squared
static const double mu0 = 4*pi*1.e-7 * henry/m
static const double epsilon0 = 1./(c_squared*mu0)
static const double elm_coupling = e_squared/(4*pi*epsilon0)
static const double fine_structure_const = elm_coupling/hbarc
static const double classic_electr_radius = elm_coupling/electron_mass_c2
static const double electron_Compton_length = hbarc/electron_mass_c2
static const double Bohr_radius = electron_Compton_length/fine_structure_const
static const double alpha_rcl2
static const double twopi_mc2_rcl2
static const double k_Boltzmann = 8.617385e-11 * MeV/kelvin
static const double STP_Temperature = 273.15*kelvin
static const double STP_Pressure = 1.*atmosphere
static const double kGasThreshold = 10.*mg/cm3
static const double universe_mean_density = 1.e-25*g/cm3