Source: Phys Lett 170B (April 1986)
static const double pi = 3.141592653589793238462643383;
static const double e = 2.718281828459045235360287471;
static const double eulmasch = 0.577215664901532861;
static const double ar = 6.022045e+23;
static const double clight = 2.99792458e+8;
static const double epsilon0 = 8.854187818e-12;
static const double mu0 = 1.256637061435917295385057353e-6;
static const double hPlanck = 6.626176e-34;
static const double Ggrav = 6.6720e-11;
static const double amu = 1.6605655e-27;
static const double Qcharge = 1.6021892e-19;
static const double kBoltzmann = 1.380662e-23;
static const double sigmaStefBoltz = 5.67032e-8;
static const double elecmass = 9.109534e-31;