Revisiting charmonium hybrid spectroscopy

TL;DR

This paper predicts the masses and decay signatures of charmonium hybrid states using a constituent gluon model, aiding experimental searches for these elusive nonperturbative QCD phenomena.

Contribution

It introduces a constituent gluon model for charmonium hybrids and provides specific mass predictions and decay signatures for experimental identification.

Findings

Predicted hybrid masses between 4.19 and 4.32 GeV.

Identified decay patterns as signatures for experimental detection.

Provided guidance for future experimental searches.

Abstract

Hadrons with explicit gluonic degrees of freedom, such as charmonium hybrids, are key to understanding nonperturbative behavior of strong interaction, yet they remain experimentally elusive. Within a constituent gluon model treating the hybrid as a $c\bar{c}g$ three-body system with a transverse electric gluon, we predict the masses of the lightest hybrid multiplet ($J^{PC}=1^{--}, 0^{-+}, 1^{-+}, 2^{-+}$) to lie in the range $4.19$--$4.32$ GeV. By analyzing their decay patterns, we provide specific, experimentally testable signatures to guide the search for these exotic states at current and future facilities.