A study of charged kappa in $J/\psi \to K^{\pm }{K}_s{\pi }^{\mp }{\pi }^0$

Abstract

Based on $58\times 10^6$ $J/\psi$ events collected by BESII, the decay $J/\psi \to K^{\pm }{K}_s{\pi }^{\mp }{\pi }^0$ is studied. In the invariant mass spectrum recoiling against the charged $K^{\ast }(892{)}^{\pm }$, the charged $\kappa$ 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 $(849\pm 77_{-14}^{+18})-i(256\pm 40_{-22}^{+46})$ MeV/$c^2$. Also in this channel, the decay $J/\psi \to K^{\ast }(892{)}^{+}{K}^{\ast }(892{)}^{-}$ is observed for the first time. Its branching ratio is $(1.00\pm 0.19_{-0.32}^{+0.11})\times 10^{-3}$.

14 pages, 4 figures

References in corpus (7)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Study of tau- -> K_S pi- nu_tau decay at Belle
• Evidence for kappa Meson Production in J/psi -> bar{K}^*(892)^0K^+pi^- Process
• Production of $\sigma$ in $\psi (2S)\to {\pi }^{+}{\pi }^{-}J/\psi$
• Amplitude Analysis of the decay D^0 --> K^- K^+ pi^0
• Measurement of Interfering K^*+K^- and K^*-K^+ Amplitudes in the Decay D^0 --> K^+K^-pi^0
• Model Independent Measurement of Form Factors in the Decay D^+ --> K^- pi^+ e^+ nu_e

Cited by in corpus (9)

• Rummukainen-Gottlieb's formula on two-particle system with different mass
• A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation
• Observation of charged kappa in J/psi -> K*(892)-+Kspi+-, K*(892)-+ -> Kspi-+ at BESII
• Strange resonance poles from $K\pi$ scattering below 1.8 GeV
• The preliminary lattice QCD calculation of $\kappa$ meson decay width
• Studying $\kappa$ meson with a MILC fine lattice
• Isospin violating decays of vector charmonia
• I=1/2 low-lying mesons in lattice QCD
• Physics of tau and charm