First Observation of Exclusive chi_cJ Decays to Two Charged and Two Neutral Hadrons

TL;DR

This paper reports the first observation of specific chi_cJ meson decays into four-hadron final states involving charged and neutral mesons, providing new insights into charmonium decay mechanisms.

Contribution

It presents the first observation of chi_cJ decays to four-hadron final states involving both charged and neutral mesons, expanding knowledge of charmonium decay channels.

Findings

First observation of these decay modes.

Identification of dominant substructure contributions.

Measurements of decay rates in specific channels.

Abstract

We study exclusive chi_c0, chi_c1 and chi_c2 decays to four-hadron final states involving two charged and two neutral mesons: pi^+pi^-pi^0pi^0, K^+K^-pi^0pi^0, pppi^0pi^0, K^+K^-etapi^0, and K^+-pi^-+K^0pi^0o. The chi_c states are produced in radiative decays of 3.08 million psi-prime resonance decays and observed in the CLEO detector. We also measure the largest substructure contributions to the modes pi^+pi^-pi^0pi^0 and K^+-pi^-+K^0pi^0.