Evidence for κ meson production in J/ψ→K¯∗(892)0K+π− process

2005/06/30 by M. Ablikim, J.Z. Bai, Y. Ban +97 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1016/j.physletb.2005.12.062

published as Phys.Lett.B633:681-690,2006 · 17 pages, 5 figures

openalex publication_date 2006/01/19 · arxiv created 2006/02/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

Based on 58 million BESII J/ψ events, the K¯∗(892)0K+π− channel in K+K−π+π− is studied. A clear low mass enhancement in the invariant mass spectrum of K+π− is observed. The low mass enhancement does not come from background of other J/ψ decay channels, nor from phase space. Two independent partial wave analyses have been performed. Both analyses favor that the low mass enhancement is the κ, an iso-spinor scalar resonant state. The average mass and width of the κ in the two analyses are 878±23−55+64MeV/c2 and 499±52−87+55MeV/c2, respectively, corresponding to a pole at (841±30−73+81)−i(309±45−72+48)MeV/c2.

Citations

• N/Ddescription of two meson amplitudes and chiral symmetry
• Large final-state interaction in the0−0−decays ofJ/ψ
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• 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

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