${{\boldsymbol Z}_{{c}}{(3900)}}$ $\rightarrow$ ${{\boldsymbol \eta}_{{c}}{(1S)}}{{\boldsymbol \rho}{(770)}^{\pm}}$ INSPIRE search

$\Gamma($ ${{\mathit Z}_{{c}}{(3900)}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}{(1S)}}{{\mathit \rho}{(770)}^{\pm}}$ $)/\Gamma($ ${{\mathit Z}_{{c}}{(3900)}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}}$ $)$
$\Gamma_{4}/\Gamma_{1}$
M210R12