. . . . . . "Electron Radius"@en . . . "http://en.wikipedia.org/wiki/Classical_electron_radius"^^ . "http://www.iso.org/iso/catalogue_detail?csnumber=31895"^^ . . . . . . . . . "\\(r_e = \\frac{e^2}{4\\pi m_e c_0^2}\\), where \\(e\\) is the elementary charge, \\(\\varepsilon_0\\) is the electric constant, item \\(m_e\\) is the rest mass of electrons, and \\(c_0\\) is the speed of light in vacuum."^^ . . . . . . . "\"Electron Radius\", also known as the Lorentz radius or the Thomson scattering length, is based on a classical (i.e., non-quantum) relativistic model of the electron." . . . . . . . . . . . . . . . "r_e" . . . . .