Evidence for the singly Cabibbo-suppressed decay Ωc0→Ξ−π+ and search for Ωc0→Ξ−K+ and Ω K + decays at Belle

The Belle Collaboration

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Abstract

Using a data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e collider, we study for the first time the singly Cabibbo-suppressed decays Ωc0→Ξ−π+ and ΩK+ and the doubly Cabibbo-suppressed decay Ωc0→Ξ−K+. Evidence for an Ωc0 signal in the Ωc0→ Ξπ+ mode is reported with a significance of 4.5σ including systematic uncertainties. The ratio of branching fractions to the normalization mode Ωc0→ Ωπ+ is measured to beB(Ωc0→Ξ−π+)/B(Ωc0→Ω−π+)=0.253±0.052(stat.)±0.030(syst.). No significant signals of Ωc0→Ξ−K+ and ΩK+ modes are found. The upper limits at 90% confidence level on ratios of branching fractions are determined to beB(Ωc0→Ξ−K+)/B(Ωc0→Ω−π+)<0.070 andB(Ωc0→Ω−K+)/B(Ωc0→Ω−π+)<0.29. [Figure not available: see fulltext.].

Original languageEnglish
Article number55
JournalJournal of High Energy Physics
Volume2023
Issue number1
DOIs
Publication statusPublished - 2023 Jan

Bibliographical note

Publisher Copyright:
© 2023, The Author(s).

Keywords

  • Branching fraction
  • Charm Physics
  • Particle and Resonance Production
  • e-e Experiments

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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