Study of $J/\psi \to \omega K^+K^-$

TL;DR

This study analyzes $J/psi o   K^+K^-$ decays using a large data sample, identifying signals for specific resonances and estimating their branching ratios, contributing to understanding meson spectroscopy.

Contribution

It provides new experimental data on $J/psi$ decays, identifying resonance signals and constraining branching ratios, which advances knowledge of meson properties and decay mechanisms.

Findings

Detection of $f_0(1710) o K^+K^-$ signal

Observation of a peak consistent with $f_2(2150) o Kar K$

Branching ratio $BR(f_0(1710) o\u03c0\u03c0)/BR(f_0(1710) o Kar K) < 0.11$ at 95% CL

Abstract

New data are presented on $J/\psi \to \omega K^+K^-$ from a sample of 58M $J/\psi$ events in the upgraded BES II detector at the BEPC. There is a conspicuous signal for $f_0(1710) \to K^+K^-$ and a peak at higher mass which may be fitted with $f_2(2150) \to K\bar K$. From a combined analysis with $\omega \pi ^+ \pi ^-$ data, the branching ratio $BR(f_0(1710)\to\pi\pi)/BR(f_0(1710) \to K\bar K)$ is $< 0.11$ at the 95% confidence level.