In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2021, No. 11 ( 2021-11)
Abstract:
Using 1310 . 6 × 10 6 J/ψ and 448 . 1 × 10 6 ψ (3686) events collected with the BESIII detector, the branching fractions of J/ψ decays to Σ + $$ \overline{\Sigma} $$ 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 + $$ \overline{\Sigma} $$ 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 $$ \mathcal{B} $$ B ( ψ (3686) → Σ + $$ \overline{\Sigma} $$ Σ ¯ − ) / $$ \mathcal{B} $$ B ( J/ψ → Σ + $$ \overline{\Sigma} $$ Σ ¯ − ) is determined to be (23 . 8 ± 1 . 1)% which violates the “12% rule”.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP11(2021)226
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2021
detail.hit.zdb_id:
2027350-2
