${{\boldsymbol X}{(4020)}}$ $\rightarrow$ ${{\boldsymbol \eta}_{{c}}}{{\boldsymbol \pi}^{+}}{{\boldsymbol \pi}^{-}}$ INSPIRE search

$\Gamma($ ${{\mathit X}{(4020)}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{4}/\Gamma$
M213R00