Measurement of branching fractions of Λ c + decays to Σ + η and Σ + η′

Journal article

By analyzing e+e− collision data taken at center-of-mass energies s between 4.600 and 4.699 GeV with the BESIII detector at the BEPCII collider, corresponding to an integrated luminosity of 4.5 fb−1, we study the hadronic decays Λc+→Σ+η and Λc+→Σ+η′ using the single-tag method. The branching fraction ratio of Λc+→Σ+η relative to Λc+→Σ+π0 is determined to be 0.305 ± 0.046stat.± 0.007syst., and that of Λc+→Σ+η′ relative to Λc+→Σ+ω is 0.336 ± 0.094stat± 0.037syst. The ratio of BΛc+→Σ+η′BΛc+→Σ+η is determined to be 1.73 ± 0.22stat.± 0.16syst.. These results enrich our knowledge of charmed baryon decays.

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: 2025
• Issue: 11
• Article number: 67
• Publication date: 2025-11-12
• Acceptance date: 2025-09-19
• DOI: 10.1007/jhep11(2025)067
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: Branching fraction; e+-e− Experiments; Charm Physics