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${{\mathit e}}$ MASS (atomic mass units u)
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$(5.48579909070 \pm0.00000000016) \times 10^{-4}$ u
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${{\mathit e}}$ MASS
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$0.5109989461 \pm0.0000000031$ MeV
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$({\mathit m}_{{{\mathit e}^{+}}}–{\mathit m}_{{{\mathit e}^{-}}})/{\mathit m}_{\mathrm {average}}$
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$<8 \times 10^{-9}$ CL=90.0%
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$\vert \mathit q_{{{\mathit e}^{+}}}~+~\mathit q_{{{\mathit e}^{-}}}\vert /{{\mathit e}}$
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$<4 \times 10^{-8}$
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${{\mathit \mu}_{{e}}}/{{\mathit \mu}_{{B}}}$ $−$ 1 = ($\mathit g−$2)/2
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$0.00115965218091 \pm0.00000000000026$
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(${\mathit g}_{{{\mathit e}^{+}}}–{\mathit g}_{{{\mathit e}^{-}}}$) $/$ $\mathit g_{{\mathrm {average}}}$
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$(-0.5 \pm2.1) \times 10^{-12}$
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${{\mathit e}}$ ELECTRIC DIPOLE MOMENT (d)
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$<1.1 \times 10^{-29}$ $\mathit e~$cm CL=90.0%
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${{\mathit e}}$ $\rightarrow$ ${{\mathit \nu}_{{e}}}{{\mathit \gamma}}$ and astrophysical limits
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$>6.6 \times 10^{28}$ yr CL=90.0%
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Disappearance and nuclear-de-excitation experiments
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$>6.4 \times 10^{24}$ yr CL=68.0%
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${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{\pm}}{{\mathit \tau}^{\mp}}{)}$ $/$ ${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{)}$
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$<8.9 \times 10^{-6}$ CL=95.0%
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${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{\pm}}{{\mathit \tau}^{\mp}}{)}$ $/$ ${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{)}$
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$<4.0 \times 10^{-6}$ CL=95.0%
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