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

$\Gamma($ ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \eta}^{\,'}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{14}/\Gamma$
M047R21