${{\boldsymbol \Upsilon}{(4S)}}$ $\rightarrow$ ${{\boldsymbol \Upsilon}{(1S)}}{{\boldsymbol \eta}^{\,'}}$ INSPIRE search

$\Gamma($ ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}^{\,'}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{20}/\Gamma$
M047R03