Measurement of branching fractions of J/ψ and ψ(3686) decays to Σ+ and Σ ¯

The BESIII Collaboration

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6 Scopus citations

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”. [Figure not available: see fulltext.]

Original languageEnglish (US)
Article number226
JournalJournal of High Energy Physics
Volume2021
Issue number11
DOIs
StatePublished - Nov 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).

Keywords

  • Branching fraction
  • QCD
  • e-e Experiments

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