Modelling glueballs

TL;DR

This paper reviews the current theoretical and experimental status of glueballs in QCD, highlighting existing candidates and emphasizing the need for further research on heavier gluonic states.

Contribution

It provides a concise overview of the status of glueball research and discusses future directions in both experimental and theoretical studies.

Findings

Identification of promising scalar glueball candidates

Discussion of less clear tensor and pseudoscalar candidates

Highlighting the need for further research on heavier states

Abstract

Glueballs are predicted in various theoretical approaches of QCD (most notably lattice QCD), but their experimental verification is still missing. In the low-energy sector some promising candidate for the scalar glueball exist, and some (less clear) candidates for the tensor and pseudoscalar glueballs were also proposed. Yet, for heavier gluonic states there is much work to be done both from the experimental and theoretical points of view. In these proceedings, we briefly review the current status of research of glueballs and discuss future developments.