eta(1405) in a chiral approach based on mixing of the pseudoscalar glueball with the first radial excitations of eta and eta'

TL;DR

This paper investigates the eta(1405) as a potential pseudoscalar glueball by modeling its mixing with quark-antiquark states within a chiral framework, analyzing decay properties to support its identification.

Contribution

It introduces a mixing model of pseudoscalar quarkonia and glueball states in a chiral approach to explain eta(1405)'s properties and support its glueball candidate status.

Findings

Decay properties support eta(1405) as a pseudoscalar glueball candidate.

Mixing scenario explains peculiar decay patterns of eta(1405).

Model provides a framework for identifying glueball states in meson spectra.

Abstract

The supernumerous eta(1405) is considered a strong candidate for the pseudoscalar glueball. In a phenomenological chiral approach, we consider a mixing scenario of bare pseudoscalar (n bar n) and (s bar s) quarkonia with the glueball. We study the decay properties and point out the peculiarities of this scenario in order to support the possible identification of the J(PC) = 0(-+) glueball.