Measurement of branching fractions of J/ψ and ψ(3686) decays to Σ+ and $$ \overline{\Sigma} $$−

Journal article

Using 1310.6 × 106J/ψ and 448.1 × 106ψ(3686) events collected with the BESIII detector, the branching fractions of J/ψ decays to Σ+Σ ¯ − is measured to be (10.61 ± 0.04 ± 0.36) × 10−4, which is significantly more precise than the current world average. The branching fractions of ψ(3686) decays to Σ+Σ ¯ − is measured to be (2.52 ± 0.04 ± 0.09) × 10−4, which is consistent with the previous measurements. In addition, the ratio of B(ψ(3686) → Σ+Σ ¯ −)/B(J/ψ → Σ+Σ ¯ −) is determined to be (23.8 ± 1.1)% which violates the “12% rule”. [Figure not available: see fulltext.

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Ahmed, S; Albrecht, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2021
• Issue: 11
• Pages: 226
• Publication date: 2021-11-01
• DOI: 10.1007/jhep11(2021)226
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English