${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \eta}_{{{c}}}}$ INSPIRE search

$\Gamma($ ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \eta}_{{{c}}}})/\Gamma_{\text{total}}$
$\Gamma_{9}/\Gamma$
M052R53