Observation of $\chi_{c0}\to\Sigma^{+}\bar{\Sigma}^{-}\eta$ and evidence
for $\chi_{c1,2}\to\Sigma^{+}\bar{\Sigma}^{-}\eta$
Observation of $\chi_{c0}\to\Sigma^{+}\bar{\Sigma}^{-}\eta$ and evidence
for $\chi_{c1,2}\to\Sigma^{+}\bar{\Sigma}^{-}\eta$
Using $(27.12\pm 0.14)\times10^{8}$ $\psi(3686)$ events collected with the BESIII detector, the decay $\chi_{c0}\to\Sigma^{+}\bar{\Sigma}^{-}\eta$ is observed for the first time with a statistical significance of $7.0\sigma$, and evidence for $\chi_{c1}\to\Sigma^{+}\bar{\Sigma}^{-}\eta$ and $\chi_{c2}\to\Sigma^{+}\bar{\Sigma}^{-}\eta$ is found with statistical significances of $4.3\sigma$ and $4.6\sigma$, respectively. The branching fractions are determined to be $\mathcal{B}(\chi_{c0}\to\Sigma^{+}\bar{\Sigma}^{-}\eta)=({1.26 \pm …