Measurements of J/\psi decays into \omega K \bar{K} \pi and \phi K \bar{K} \pi

TL;DR

This study investigates specific decay modes of J/ψ particles, revealing mass enhancements in some channels and measuring several branching fractions, including the first measurement of J/ψ to η K0s K± π∓.

Contribution

It provides new measurements of branching fractions for J/ψ decays into various mesonic final states, including the first measurement of J/ψ to η K0s K± π∓, and observes mass enhancements in certain decay channels.

Findings

Mass enhancements at around 1.44 GeV/c² in ω Kar{K}π decays.

No mass enhancements observed in φ Kar{K}π decays.

First measurement of J/ψ → η K0s K± π∓ branching fraction.

Abstract

The decays of $J/\psi \to \omega K\bar{K}\pi$ and $J/\psi \to \phi K\bar{K}\pi$ are studied using $5.8 \times 10^{7}$ $J/\psi$ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider (BEPC). The $K^{0}_{S}K^{\pm}\pi^{\mp}$ and $K^{+}K^{-}\pi^{0}$ systems, produced in $J/\psi \to \omega K\bar{K}\pi$, have enhancements in the invariant mass distributions at around 1.44 GeV/$c^{2}$. However, there is no evidence for mass enhancements in the $K\bar{K}\pi$ system in $J/\psi \to \phi K\bar{K}\pi$. The branching fractions of $J/\psi \to \omega K^{0}_{S}K^{\pm}\pi^{\mp}$, $\phi K^{0}_{S}K^{\pm}\pi^{\mp}$, $\omega K^{*}\bar{K}+c.c.$, and $\phi K^{*}\bar{K}+c.c.$ are obtained, and the $J/\psi \to \eta K^{0}_{S}K^{\pm}\pi^{\mp}$ branching fraction is measured for the first time.