Observation of $\psi \left(3686\right)\to \Xi \left(1530{\right)}^{0}\overline{\Xi }\left(1530{\right)}^{0}$ and $\Xi \left(1530{\right)}^{0}{\overline{\Xi }}^{0}$

Using $\left(448.1±2.9\right)×{10}^{6}$ $\psi \left(3686\right)$ events collected with the BESIII detector and a single-baryon tagging technique, we present the first observation of the decays $\psi \left(3686\right)\to \Xi \left(1530{\right)}^{0}\overline{\Xi }\left(1530{\right)}^{0}$ and $\Xi \left(1530{\right)}^{0}{\overline{\Xi }}^{0}$. The branching fractions are measured to be $B\left(\psi \left(3686\right)\to \Xi \left(1530{\right)}^{0}\overline{\Xi }\left(1530{\right)}^{0}\right)=\left(6.77±0.14±0.39\right)×{10}^{-5}$ and $B\left(\psi \left(3686\right)\to \Xi \left(1530{\right)}^{0}{\overline{\Xi }}^{0}\right)=\left(0.53±0.04±0.03\right)×{10}^{-5}$. Here, the first and second uncertainties are statistical and systematic, respectively. In addition, the parameter associated with the angular distribution for the decay $\psi \left(3686\right)\to \Xi \left(1530{\right)}^{0}\overline{\Xi }\left(1530{\right)}^{0}$ is determined to be $\alpha =0.32±0.19±0.07$, in agreement with theoretical predictions within one standard deviation.