A study of charged κ in J/ψ→K±KSπ∓π0

2010/02/28 by M. Ablikim, J.Z. Bai, Y. Bai +97 · 14 citations
Physics and Astronomy · #Archaeology #High-Energy Particle Collisions Research #History #Invariant mass #Ion #Mass spectrum #Nuclear physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scroll #hep-ex

paper · pdf · doi:10.1016/j.physletb.2010.08.015

published in Physics Letters B 693(2), 88-94 (Elsevier BV) · 14 pages, 4 figures

openalex publication_date 2010/08/15 · arxiv created 2010/09/02 · openalex created_date 2016/06/24 · arxiv updated 2019/08/13 · openalex updated_date 2026/08/05

Abstract

Based on 58 × 10⁶ J/ψ events collected by BESII, the decay J/ψ→ K^± K_s π^∓ π⁰ is studied. In the invariant mass spectrum recoiling against the charged K^*(892)^±, the charged κ particle is found as a low mass enhancement. If a Breit-Wigner function of constant width is used to parameterize the kappa, its pole locates at (849 ± 77 ⁺¹⁸_-14) -i (256 ± 40 ⁺⁴⁶_-22) MeV/c². Also in this channel, the decay J/ψ→ K^*(892)⁺ K^*(892)^- is observed for the first time. Its branching ratio is (1.00 ± 0.19 ^+0.11_-0.32) × 10^-3.

Citations

• Study of τ−→KSπ−ντ decay at Belle
• Review of Particle Physics
• The κ resonance in s wave πK scatterings
• N/Ddescription of two meson amplitudes and chiral symmetry
• Evidence for κ meson production in J/ψ→K¯∗(892)0K+π− process
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Evidence for a scalar κ(900) resonance inπKscattering
• K-matrix analysis of the Kπ S-wave in the mass region 900–2100 MeV and nonet classification of scalar qq-states
• Analysis of a K -Scattering Phase Shift and Evidence for the (900) Meson