Observation of the decay $\psi (3686)\to {\mathrm{\Sigma }}^0{\bar{\mathrm{\Sigma }}}^0\omega$

Using a dataset of $(27.12\pm 0.14)\times {10}^8$ $\psi (3686)$ events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of the decay $\psi (3686)\to {\mathrm{\Sigma }}^0{\bar{\mathrm{\Sigma }}}^0\omega$ with a statistical significance of 8.9$\sigma$. The measured branching fraction is $(1.24\pm {0.16}_{\text{stat}}\pm {0.11}_{\text{sys}})\times {10}^{-5}$, where the first uncertainty is statistical and the second is systematic. Additionally, we investigate potential intermediate states in the invariant mass distributions of ${\mathrm{\Sigma }}^0\omega$, ${\bar{\mathrm{\Sigma }}}^0\omega$ and ${\mathrm{\Sigma }}^0{\bar{\mathrm{\Sigma }}}^0$. A hint of a resonance is observed in the invariant mass distribution of $M_{{\mathrm{\Sigma }}^0({\bar{\mathrm{\Sigma }}}^0)\omega }$, located around 2.06 GeV/$c^2$, with a significance of 2.5$\sigma$.