${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit e}^{-}}{+}$ ${{\mathit \mu}^{-}}{{\mathit e}^{+}}$   Decay Mode Summary INSPIRE   PDGID:
S014.20
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{33}$ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit e}^{-}}{+}$ ${{\mathit \mu}^{-}}{{\mathit e}^{+}}$ $<6 \times 10^{-6}$ CL= 90% 264
Category: Charge conjugation ($\mathit C$), Parity ($\mathit P$), Charge conjugation ${\times }$ Parity ($\mathit CP$), or Lepton Family number ($\mathit LF$) violating modes
Note: (LF) Lepton family number conservation means separate conservation of each of $\mathit L_{{{\mathit e}}}$, $\mathit L_{{{\mathit \mu}}}$, $\mathit L_{{{\mathit \tau}}}$.
The following data is related to the above value:
$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit e}^{-}}{+}$ ${{\mathit \mu}^{-}}{{\mathit e}^{+}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{33}/\Gamma$