Measurement of Born cross sections and effective form factors of e + e − → Ω − Ω ¯ + from s = 3.7 to 4. 7 GeV

Journal article

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.

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Afedulidis, O; Ai, XC

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2026
• Issue: 2
• Article number: 212
• Publication date: 2026-02-20
• Acceptance date: 2026-01-06
• DOI: 10.1007/jhep02(2026)212
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: e+-e− Experiments; QCD