${{\mathit h}_{{{c}}}{(1P)}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \eta}_{{{c}}}{(1S)}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M144.33
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{31}$ ${{\mathit h}_{{{c}}}{(1P)}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \eta}_{{{c}}}{(1S)}}$ ($3.5$ $\pm0.7$) $ \times 10^{-3}$ 500
Category: Radiative decays
The following data is related to the above value:
$\Gamma({{\mathit h}_{{{c}}}{(1P)}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \eta}_{{{c}}}{(1S)}})/\Gamma({{\mathit h}_{{{c}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{{c}}}{(1S)}})$
$\Gamma_{31}/\Gamma_{30}$