PhysicsConstants.h

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const double SpeedLight = 299792458.; // m/s
const double ns = 1e9;
const double degree = 180./TMath::Pi();
const double km = 1000.;
const double PlankConstant = 6.62606957 * 1e-34; // m2 kg / s
const double LambdaLaser = 355*1e-9; // m
const double EeV = 1e18;
const double PeV = 1e15;
const double e_charge = 1.602176634*1e-19;
const double EnDensity_From_JE2 = 6.25214e+34;
const double EnDensity_log10_From_JE2 = log(10.)*6.25214e+34;
const double ndays_year=365.242199;
const double al_per_pc = 3.261563777;