LEPTONS INSPIRE  

${{\mathit e}}$

$J$ = $1/2$ 
${{\mathit e}}$ MASS (atomic mass units u)   $(5.48579909065 \pm0.00000000016) \times 10^{-4}$ u 
 
${{\mathit e}}$ MASS   $0.51099895000 \pm0.00000000015$ MeV 
 
$({\mathit m}_{{{\mathit e}^{+}}}–{\mathit m}_{{{\mathit e}^{-}}})/{\mathit m}_{\mathrm {average}}$   $<8 \times 10^{-9}$   CL=90.0%
 
$\vert \mathit q_{{{\mathit e}^{+}} }~+~\mathit q_{{{\mathit e}^{-}} }\vert /{{\mathit e}}$   $<4 \times 10^{-8}$  
 
${{\mathit e}}$ MAGNETIC MOMENT ANOMALY
${{\mathit \mu}_{{e}}}$ /${{\mathit \mu}_{{B}}}$ $−$ 1 = ($\mathit g−$2)/2   $0.00115965218076 \pm0.00000000000028$  
 
(${\mathit g}_{{{\mathit e}^{+}}}–{\mathit g}_{{{\mathit e}^{-}}}$) $/$ $\mathit g_{{\mathrm {average}}}$   $(-0.5 \pm2.1) \times 10^{-12}$  
 
${{\mathit e}}$ ELECTRIC DIPOLE MOMENT (d)   $<1.1 \times 10^{-29}$ $\mathit e~$cm  CL=90.0%
 
${{\mathit e}^{-}}$ MEAN LIFE $/$ BRANCHING FRACTION
${{\mathit e}}$ $\rightarrow$ ${{\mathit \nu}_{{e}}}{{\mathit \gamma}}$ and astrophysical limits   $>6.6 \times 10^{28}$ yr  CL=90.0%
 
Disappearance and nuclear-de-excitation experiments   $>6.4 \times 10^{24}$ yr  CL=68.0%
 
LIMITS ON LEPTON-FLAVOR VIOLATION IN PRODUCTION
${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{\pm}}{{\mathit \tau}^{\mp}}{)}$ $/$ ${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{)}$   $<8.9 \times 10^{-6}$   CL=95.0%
 
${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{\pm}}{{\mathit \tau}^{\mp}}{)}$ $/$ ${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{)}$   $<4.0 \times 10^{-6}$   CL=95.0%
 
FOOTNOTES