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

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