Decay modes of the excited pseudoscalar glueball

TL;DR

This paper analyzes decay channels of excited pseudoscalar glueballs using chiral Lagrangians, providing parameter-free predictions for branching ratios relevant to ongoing and upcoming experiments like BESIII and PANDA.

Contribution

It introduces a theoretical framework for decay predictions of pseudoscalar glueballs based on chiral Lagrangians, aligned with lattice QCD mass predictions.

Findings

Decay channels for excited pseudoscalar glueballs are identified.

Branching ratios are predicted without free parameters.

Results are relevant for BESIII and PANDA experiments.

Abstract

We study three different chiral Lagrangians that describe the two- and three-body decays of an excited pseudoscalar glueball, $J^{PC}=0^{*-+}$, into light mesons and charmonium states as well as into a scalar and pseudoscalar glueball. We compute the decay channels for an excited pseudoscalar glueball with a mass of $3.7$ GeV and consider a ground state pseudoscalar glueball of mass $2.6$ GeV, following predictions from lattice QCD simulations. These states and channels are in reach of the ongoing BESIII experiment and the PANDA experiments at the upcoming FAIR facility experiment. We present the resulting decay branching ratios with a parameter-free prediction.