${{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
S044.45
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{63}$ ${{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$ $<6.8 \times 10^{-6}$ CL= 95%
Note: For ${\mathit m}_{\mathrm {{{\mathit \gamma}} {{\mathit \gamma}}}}$ = ($60$ $\pm5$) GeV.
The following data is related to the above value:
$\Gamma({{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \gamma}}{{\mathit \gamma}})/\Gamma_{\text{total}}$
$\Gamma_{63}/\Gamma$