${{\mathit \psi}{(4160)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}{(3940)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit J / \psi}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M025.41
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{41}$ ${{\mathit \psi}{(4160)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}{(3940)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit J / \psi}}$ $<1.79 \times 10^{-4}$ CL= 90%
The following data is related to the above value:
$\Gamma({{\mathit \psi}{(4160)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}{(3940)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit J / \psi}})/\Gamma_{\text{total}}$
$\Gamma_{41}/\Gamma$