TL;DR
This paper reviews recent lattice QCD studies of glueballs, discusses experimental challenges, and updates on the scalar glueball candidate, concluding no clear scalar glueball below 2 GeV.
Contribution
It provides an updated review of lattice QCD results on glueballs and explores the nature of the scalar glueball candidate in light of recent findings.
Findings
No scalar glueball below 2 GeV identified
Lattice QCD studies face challenges with dynamical quarks
Recent experimental candidate discussed
Abstract
The recent BESIII announcement of a pseudoscalar glueball candidate makes an update on glueballs from lattice QCD timely. A brief review of how glueballs are studied in lattice QCD is given, and the reasons that glueballs are difficult to study both in lattice QCD with dynamical quarks and in experiments are outlined. Recent glueball studies in lattice QCD are then presented, and an exploratory investigation of the scalar glueball using glueball, meson, and meson-meson operators is summarized, suggesting that no scalar state below 2 GeV or so can be considered to be predominantly a glueball state.
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Taxonomy
TopicsChemical synthesis and alkaloids · Cancer Treatment and Pharmacology