${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \eta}_{{c}}{(2S)}}$   Decay Mode Summary INSPIRE   PDGID:
M052.147
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{13}$ ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \eta}_{{c}}{(2S)}}$ $<2.5 \times 10^{-6}$ CL= 90% 3707
The following data is related to the above value:
$\Gamma($ ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \eta}_{{c}}{(2S)}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{13}/\Gamma$