Observation of ψ(3686) → ΛΛ η^′ decay

2023/09/25 by Ablikim, M.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2309.13790

openalex publication_date 2023/09/25 · openalex created_date 2023/09/27 · openalex updated_date 2026/08/03

Abstract

Using a sample of (27.12± 0.14) × 10⁸ ψ(3686) events collected with the BESIII detector, the decay ψ(3686) → ΛΛ η' with η' subsequently decaying into γπ⁺ π^- and ηπ⁺ π^- is observed for the first time. The branching fraction of ψ(3686) → ΛΛη' is measured to be (7.34±0.94(stat.)±0.43(sys.))×10^-6. No resonant structures are evident in the Λη', Λη' and ΛΛ mass spectra.

Related

• Observation of ψ(3686)→ γη(1405) via η(1405)→ f₀(980)π⁰
• Partial wave analyses of ψ(3686)→ ppπ⁰ and ψ(3686)→ ppη
• Study of ψ(3686)→ΛΛω
• Observation of ψ(3686)→ 3ϕ
• Study of the decays ψ(3686)→γχ_cJ→γpK^*+Λ+c.c. and ψ(3686)→pK^*+Λ+c.c.