Comment on "The QCD axion beyond the classical level: A lattice study"

TL;DR

This paper critiques a previous claim about the lower bound of the QCD axion mass, identifying errors in their analytic and numerical methods.

Contribution

It provides a rebuttal to prior work, correcting misconceptions about axion mass constraints through analysis of their arguments and simulations.

Findings

Identified errors in Nakamura and Schierholz's analytic approach.

Highlighted inaccuracies in their numerical simulations.

Reaffirmed the need for revised bounds on axion mass.

Abstract

We rebut the claim by Nakamura and Schierholz [1] that the mass of a potential axion needs to be no less than ~230MeV pointing out errors in both their analytic argument and numerical simulations.