物理定数したい（G4PhysicalConstants.hh）

using CLHEP::alpha_rcl2;
using CLHEP::amu;
using CLHEP::amu_c2;
using CLHEP::Avogadro;
using CLHEP::Bohr_radius;
using CLHEP::c_light;
using CLHEP::c_squared;
using CLHEP::classic_electr_radius;
using CLHEP::e_squared;
using CLHEP::electron_charge;
using CLHEP::electron_Compton_length;
using CLHEP::electron_mass_c2;
using CLHEP::elm_coupling;
using CLHEP::epsilon0;
using CLHEP::fine_structure_const;
using CLHEP::h_Planck;
using CLHEP::halfpi;
using CLHEP::hbar_Planck;
using CLHEP::hbarc;
using CLHEP::hbarc_squared;
using CLHEP::k_Boltzmann;
using CLHEP::kGasThreshold;
using CLHEP::mu0;
using CLHEP::neutron_mass_c2;
using CLHEP::pi;
using CLHEP::pi2;
using CLHEP::proton_mass_c2;
using CLHEP::STP_Pressure;
using CLHEP::STP_Temperature;
using CLHEP::twopi;
using CLHEP::twopi_mc2_rcl2;
using CLHEP::Bohr_magneton;
using CLHEP::nuclear_magneton;
using CLHEP::universe_mean_density;

CLHEPライブラリの物理定数を読み込み、グローバル変数として使えるようになっています。