Properties of low-lying charmonia and bottomonia from lattice QCD + QED

TL;DR

This paper presents the first lattice QCD+QED calculations of ground-state charmonium and bottomonium properties, highlighting the importance of electromagnetic effects at high-precision levels.

Contribution

It introduces the initial lattice QCD+QED computations for heavy quarkonia, incorporating electromagnetic effects into the analysis.

Findings

QED effects are significant at sub-1% precision levels.

First lattice QCD+QED results for charmonium and bottomonium.

Improved understanding of electromagnetic contributions to meson properties.

Abstract

The precision of lattice QCD calculations has been steadily improving for some time and is now approaching, or has surpassed, the 1% level for multiple quantities. At this level QED effects, i.e. the fact that quarks carry electric as well as color charge, come into play. In this report we will summarise results from the first lattice QCD+QED computations of the properties of ground-state charmonium and bottomonium mesons by the HPQCD Collaboration.