Meson and Baryon Spectroscopy on a Lattice

TL;DR

This paper reviews lattice QCD calculations of hadron spectra, discussing systematic errors, ground and excited states, electromagnetic effects, and mechanisms behind mass splittings, aimed at low energy hadronic physicists.

Contribution

It provides a comprehensive overview of recent lattice QCD results on hadron spectroscopy, including systematic error analysis and insights into mass splitting mechanisms.

Findings

Lattice QCD successfully computes ground state hadron properties.

Excited hadron spectra are less explored but show promising results.

Electromagnetic effects influence hadron mass measurements.

Abstract

I review the results of hadron spectroscopy calculations from lattice QCD for an intended audience of low energy hadronic physicists. I briefly introduce the ideas of numerical lattice QCD. The various systematic errors, such as the lattice spacing and volume dependence, in lattice QCD calculations are discussed. In addition to the discussion of the properties of ground state hadrons, I also review the small amount of work done on the spectroscopy of excited hadrons and the effect of electromagnetic fields on hadron masses. I also discuss the attempts to understand the physical mechanisms behind hadron mass splittings.