Baryon masses with improved staggered quarks

TL;DR

This paper reports on lattice QCD simulations using improved staggered quarks to accurately determine baryon masses, including the nucleon and Omega minus, by combining new and existing results at various lattice spacings and quark masses.

Contribution

It introduces new lattice QCD simulations at finer lattice spacing and lighter quark masses, and combines these with previous data to improve baryon mass calculations.

Findings

Accurate determination of nucleon and Omega minus masses.

Successful combination of new and old simulation data.

Insights into continuum and chiral limits for baryon masses.

Abstract

The MILC collaboration's simulations with improved staggered quarks are being extended with runs at a lattice spacing of 0.06 fm with quark masses down to one tenth the strange quark mass. We give a brief introduction to these new simulations and the determination of the lattice spacing. Then we combine these new runs with older results to study the masses of the nucleon and the Omega minus in the continuum and chiral limits.