${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$   Decay Mode Summary INSPIRE   PDGID:
M070.5
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{6}$ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ ($8.8$ $\pm1.4$) $ \times 10^{-3}$ 1548
Note: For $\mathit E_{{{\mathit \gamma}}}$ $>$ 100 MeV.
The following data is related to the above value:
$\Gamma($ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{6}/\Gamma$