Measurement of cross section for Near Threshold

Using ${e}^{+}{e}^{-}$ collision data at ten center-of-mass energies between 2.644 and 3.080 GeV collected with the BESIII detector at BEPCII and corresponding to an integrated luminosity of about 500 pb$^{−1}$, we measure the cross sections and effective form factors for the process ${e}^{+}{e}^{-}\to {\Xi }^{0}{\overline{\Xi }}^{0}$ utilizing a single-tag method. A fit to the cross section of ${e}^{+}{e}^{-}\to {\Xi }^{0}{\overline{\Xi }}^{0}$ with a pQCD-driven power function is performed, from which no significant resonance or threshold enhancement is observed. In addition, the ratio of cross sections for the processes ${e}^{+}{e}^{-}\to {\Xi }^{-}{\overline{\Xi }}^{+}$ and ${\Xi }^{0}{\overline{\Xi }}^{0}$ is calculated using recent BESIII measurement and is found to be compatible with expectation from isospin symmetry.