Maths and physics constants

Source: Phys Lett 170B (April 1986)

• pi:

  static const double pi = 3.141592653589793238462643383;
  

• e:

  static const double e = 2.718281828459045235360287471;
  

• Euler-Mascheroni constant:

  static const double eulmasch = 0.577215664901532861;
  

• Avogadro's number:

  static const double ar = 6.022045e+23;
  

• speed of light in vacuo (m/s)

  static const double clight = 2.99792458e+8;
  

• permittivity of free space (C^2/N/m^2)

  static const double epsilon0 = 8.854187818e-12;
  

• permeability of free space (N/A^2), (defined as pi * 4e-7)

  static const double mu0 = 1.256637061435917295385057353e-6;
  

• Planck's constant (J.s)

  static const double hPlanck = 6.626176e-34;
  

• Gravitational constant (N m^2 / kg^2)

  static const double Ggrav = 6.6720e-11;
  

• Atomic mass unit (kg)

  static const double amu = 1.6605655e-27;
  

• Quantum of charge (C)

  static const double Qcharge = 1.6021892e-19;
  

• Boltzmann's constant (J/K)

  static const double kBoltzmann = 1.380662e-23;
  

• Stefan-Boltzmann constant (W/m^2/K^4)

  static const double sigmaStefBoltz = 5.67032e-8;
  

• mass of electron (kg)

  static const double elecmass = 9.109534e-31;