Branching ratios of the pseudoscalar glueball with a mass of 2.6 GeV

TL;DR

This paper calculates the decay branching ratios of a 2.6 GeV pseudoscalar glueball using a chiral Lagrangian, providing predictions relevant for upcoming experiments like PANDA at FAIR.

Contribution

It introduces a specific chiral Lagrangian model to predict decay patterns of the pseudoscalar glueball at 2.6 GeV, based on lattice QCD predictions.

Findings

Calculated decay widths and branching ratios for the pseudoscalar glueball.

Identified key decay channels, especially scalar-isoscalar.

Provided predictions to guide future experimental searches.

Abstract

We consider a $N_f=3$ chiral Lagrangian which describes the interaction between the pseudoscalar glueball, $J^{PC}=0^{-+}$, and scalar and pseudoscalar mesons. We calculate the decay widths of the pseudoscalar glueball, where we fixed its mass to 2.6 GeV, as predicted by lattice QCD simulations, and take a closer look in the scalar-isoscalar decaying channel. We present our results as branching ratios which are relevant for the future PANDA experiment at the FAIR facility.