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- Title
Measurement of branching fractions of J/ψ and ψ(3686) decays to Σ<sup>+</sup> and Σ¯<sup>−</sup>.
- Authors
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Balossino, I.; Ban, Y.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.
- Abstract
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”.
- Publication
Journal of High Energy Physics, 2021, Vol 2021, Issue 11, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP11(2021)226