Experimental study of $\psi(2S)$ decays to $\K^+ K^- \pi^+ \pi^- \pi^0$ final states

TL;DR

This study measures the decay rates of $ ext{psi}(2S)$ particles into specific multi-kaon and pion final states, providing new data and confirming some previous measurements with a large sample collected at BESII.

Contribution

It presents the first measurements of several $ ext{psi}(2S)$ decay modes into $K^*K ext{ and } ho$ final states, expanding knowledge of charmonium decay channels.

Findings

Branching fractions for $ ext{psi}(2S)$ decays to various $K^*K$ and $ ho$ states.

Agreement with previous measurements for some decay modes.

First measurements for five decay channels.

Abstract

$K^+K^-\pi^+\pi^-\pi^0$ final states are studied using a sample of $14\times10^6$ $\psi(2S)$ decays collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Position Collider. The branching fractions of $\psi(2S)$ decays to $ K^+K^-\pi^+\pi^-\pi^0$, $\omega K^+ K^-$, $\omega f_0(1710)$, $ K^{\ast}(892)^0 K^- \pi^+\pi^0+c.c.$, $K^{\ast}(892)^{+} K^- \pi^+\pi^- +c.c.$, $K^{\ast}(892)^{+} K^- \rho^0+c.c.$ and $K^{\ast}(892)^0 K^-\rho^+ + c.c.$ are determined. The first two agree with previous measurements, and the last five are first measurements.