Measurement of Born cross sections and effective form factors of $$ {e}^{+}{e}^{-}\to {\varOmega}^{-}{\overline{\varOmega}}^{+} $$ from $$ \sqrt{s}=3.7 $$ to 4.7 GeV

Using e+e− collision data corresponding to an integrated luminosity of 22.7 fb−1, collected at center-of-mass energies between 3.7 and 4.7 GeV with the BESIII detector at the BEPCII storage ring, we measure the energy-dependent Born cross sections of e+e−→Ω−Ω¯+ and the effective form factors of the Ω− baryon. The analysis employs a single baryon tagging method, and the results are consistent with theoretical predictions, providing critical constraints on the electromagnetic structure of the Ω− hyperon. No significant signal of charmonium or charmonium-like states decaying to Ω−Ω¯+ is observed in the investigated energy range.