${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$  Decay Mode Summary INSPIRE   PDGID:
S014.12
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{14}$ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ ($5.8$ $\pm0.8$) $ \times 10^{-6}$ 253
Category: Charged modes
The following data is related to the above value:
 ▸ expand all datablocks
$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}})/\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ 2 ${{\mathit \gamma}})$
$\Gamma_{14}/\Gamma_{2}$
$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ 2 ${{\mathit \mu}^{+}}$2 ${{\mathit \mu}^{-}})/\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}})$
$\Gamma_{18}/\Gamma_{14}$
$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}})/\Gamma_{\text{total}}$
$\Gamma_{14}/\Gamma$