A bstract 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^- ^-^+ 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.
Ablikim et al. (Fri,) studied this question.