Based on $(27.08\pm 0.14)\times10^{ 8}$ $\psi(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the $\psi(3686)\to\Sigma^{ +}\bar{ \Sigma}^{ -}\omega$ and $\Sigma^{ +}\bar{ \Sigma}^{ -}\phi$ 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 $\mathcal{ B}(\psi(3686)\to\Sigma^{ +}\bar{ \Sigma}^{ -}\omega)=(1.90 \pm 0.18 \pm 0.21) \times 10^{ -5}$ and $\mathcal{ B}(\psi(3686)\to\Sigma^{ +}\bar{ \Sigma}^{ -}\phi)=(2.96 \pm 0.54 \pm 0.41) \times 10^{ -6}$, where the first uncertainties are statistical and the second systematic.
Categories: hep-ex