${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit X}{(1835)}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ , ${{\mathit X}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}$  Decay Mode Summary INSPIRE   PDGID:
M070.423
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{358}$ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit X}{(1835)}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ , ${{\mathit X}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}$ ($3.58$ $\pm0.25$) $ \times 10^{-6}$
Category: Dalitz decays
The following data is related to the above value:
$\Gamma($ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit X}{(1835)}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ , ${{\mathit X}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}})/\Gamma_{\text{total}}$
$\Gamma_{358}/\Gamma$