Observation of ψ(3686) → K^-Λ(1520)Ξ⁺ + c.c.

2025/01/05 by BESIII Collaboration, Ablikim, M., Achasov, M. N. +650
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.2501.02594

Abstract

Based on (2712.4 ± 14.3)× 10⁶ ψ(3686) events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay ψ(3686) → K^-Λ(1520)Ξ⁺ + c.c.. The product branching fraction \cal B[ψ(3686) → K^-Λ(1520)Ξ⁺ + c.c.] × \cal B[Λ(1520) → pK^-] is measured to be (9.5 ± 0.8 ± 1.1) × 10^-7, where the first uncertainty is statistical and the second systematic.

Related

• Observation of ψ(3686) → Ω^- K⁺ Ξ⁰ +c.c
• Observation of ψ(3686) → Ξ^- K⁰_S Ω⁺ +c.c
• Observation of ψ(3686)→ 3ϕ
• Study of the decays ψ(3686)→γχ_cJ→γpK^*+Λ+c.c. and ψ(3686)→pK^*+Λ+c.c.
• Measurement of the Branching Fraction for the Decay ψ(3686) → ϕK_S⁰ K_S⁰