Measurement of Born cross section of 𝑒⁺⁢𝑒⁻ →Σ⁰⁢ ¯Σ⁰ at √𝑠 = 3.50–4.95  GeV

Using 𝑒+⁢𝑒− collision data collected with the BESIII detector at the BEPCII collider at 32 center-of-mass energies from 3.50 to 4.95 GeV, corresponding to an integrated luminosity of 25  fb−1, we measure the Born cross section of the 𝑒+⁢𝑒− →Σ0⁢¯Σ0 reaction and the effective form factor for the first time. No significant charmonium(-like) state, i.e., 𝜓⁡(3770), 𝜓⁡(4040), 𝜓⁡(4160), 𝜓⁡(4230), 𝜓⁡(4360), 𝜓⁡(4415), or 𝜓⁡(4660), decaying into the Σ0⁢¯Σ0 final state is observed by fitting the 𝑒+⁢𝑒− →Σ0⁢¯Σ0 dressed cross section. The upper limits for the product of the branching fraction and the electronic partial width at the 90% confidence level are provided for each assumed charmonium(-like) state for the first time. In addition, the ratios of the Born cross section and the effective form factor between the 𝑒+⁢𝑒− →Σ0⁢¯Σ0 and the 𝑒+⁢𝑒− →Σ+⁢¯Σ− reactions are provided, which can be used to validate the prediction of the vector meson dominance model.