Gluon mass from charmonium radiative decay and its impact on the hybrid meson properties

TL;DR

This paper investigates the photon spectrum in charmonium radiative decays to estimate the effective gluon mass, aiming to understand exotic mesons like hybrids and glueballs within the Quark-Gluon Constituent Model.

Contribution

It provides a novel analysis of the gluon effective mass from experimental decay spectra, linking it to the properties of exotic mesons in QGCM.

Findings

Estimate of gluon effective mass from decay data

Implications for hybrid and glueball meson properties

Enhanced understanding of gluon dynamics in IR

Abstract

We study the photon spectrum in the radiative decays of the charmonium $\frac{1}{\Gamma}\frac{d\Gamma (J/\psi\rightarrow\gamma gg)}{dz}$ as an excellent scene for hunting the exotic mesons (hybrids $q\bar{q}g$ and glueballs $gg$) and an ideal frame for the theoretical and phenomenological investigations of the gluon nature in IR, by subtle estimation of its non-zero effective mass which seems required in Quark-Gluon Constituent Model (QGCM) for identifying the nature of these exotic species.