${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
S013.47
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{23}$ ${{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$ ($1.0$ ${}^{+0.8}_{-0.6}$) $ \times 10^{-8}$ 225
Category: Other modes with photons or ${{\mathit \ell}}{{\overline{\mathit \ell}}}$ pairs
Note: See the Particle Listings below for the energy limits used in this measurement.
The following data is related to the above value:
$\Gamma({{\mathit K}_L^0}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \gamma}}{{\mathit \gamma}})/\Gamma_{\text{total}}$
$\Gamma_{23}/\Gamma$