Towards the glueball spectrum from unquenched lattice QCD

TL;DR

This paper employs unquenched lattice QCD with a variational approach to compute the spectrum of heavy glueballs, including scattering states, on configurations with 2+1 flavors, providing new mass estimates for multiple states.

Contribution

It introduces a variational technique that incorporates scattering states for unquenched lattice QCD calculations of glueball spectra, advancing the understanding of glueball properties.

Findings

Masses for 10 glueball states reported

Includes scattering states in the analysis

Discusses prospects for unquenched oddball calculations

Abstract

We use a variational technique to study heavy glueballs on gauge configurations generated with 2+1 flavours of ASQTAD improved staggered fermions. The variational technique includes glueball scattering states. The measurements were made using 2150 configurations at 0.092 fm with a pion mass of 360 MeV. We report masses for 10 glueball states. We discuss the prospects for unquenched lattice QCD calculations of the oddballs.