Rest mass of electron

Gas Constant Boltzmann s Constant Plank s Constant Electronic charge Velocity of light Permittivity of free space Rest mass of electron Avogadro s Constant Gravitational Acceleration Faraday s Constant Permeability of free space... 

Table 3.1. Contributions of various physical effects (non-relativistic, Breit, QED and beyond QED) to the ionization energy and the dipole polarizability a of the helium atom as well as comparison with the experimental values (all quantities in atomic units, i.e. e = 1, / = 1, mg = 1, where mg denotes the rest mass of electron). The first column gives the symbol of the term in the Breit-Pauli Hamiltonian (3.70) as well as of the QED corrections given order by order (first corresponding to the electron-positron vacuum polarization (QED), then, beyond quantum electrodynamics, to other particle-antiparticle pairs (non-QED) /x, rr,...) split into several separate effects. The second column contains a short description of the effect. The estimated error (third column) is given in parentheses in the units of the last figure reported... 

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