${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \eta}}$   Decay Mode Summary INSPIRE   PDGID:
M002.21
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{38}$ ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \eta}}$ $<1.5 \times 10^{-5}$ CL= 90% 273
Category: Charge conjugation ($\mathit C$), Parity ($\mathit P$), Lepton family number ($\mathit LF$) violating modes
Note: (C) CHARGE CONJUGATION ($\mathit C$) INVARIANCE
Note: $\mathit C$ parity forbids this to occur as a single-photon process.
The following data is related to the above value:
$\Gamma($ ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \eta}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{38}/\Gamma$