${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}{(1405/1475)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \rho}^{0}}{{\mathit \rho}^{0}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M070.124
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{281}$ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}{(1405/1475)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \rho}^{0}}{{\mathit \rho}^{0}}$ ($1.7$ $\pm0.4$) $ \times 10^{-3}$ S=1.3  1223
Category: Radiative decays
The following data is related to the above value:
$\Gamma({{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}{(1405/1475)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \rho}^{0}}{{\mathit \rho}^{0}})/\Gamma_{\text{total}}$
$\Gamma_{281}/\Gamma$