Based on $(2712.4\pm 14.3)\times {10}^6$ events recorded at the $\psi (3686)$ nominal mass collected with the BESIII detector operating at the BEPCII collider, the $\psi (3686)\to {\mathrm{\Sigma }}^{+}{\overline{\mathrm{\Sigma }}}^{-}\omega$ and ${\mathrm{\Sigma }}^{+}{\overline{\mathrm{\Sigma }}}^{-}\varphi$ decays are observed for the first time with statistical significances of $13.8\sigma$ and $7.6\sigma$, respectively. The corresponding branching fractions are measured to be $\mathcal{B}(\psi (3686)\to {\mathrm{\Sigma }}^{+}{\overline{\mathrm{\Sigma }}}^{-}\omega )=(1.89\pm 0.18\pm 0.21)\times {10}^{-5}$ and $\mathcal{B}(\psi (3686)\to {\mathrm{\Sigma }}^{+}{\overline{\mathrm{\Sigma }}}^{-}\varphi )=(2.96\pm 0.54\pm 0.41)\times {10}^{-6}$, where the first uncertainties are statistical and the second systematic.

• Received 23 October 2023
• Accepted 1 November 2023

DOI:https://doi.org/10.1103/PhysRevD.108.092011

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Published by the American Physical Society