Lattice computations of the high-temperature topological susceptibility of QCD receive lattice-spacing corrections and suffer from systematics arising from the type and depth of gradient flow. We study the lattice spacing corrections to χtop semi-analytically by exploring the behavior of discretized Harrington-Shepard calorons under the action of different forms of gradient flow. From our study we conclude that Nτ=6 is definitely too small of a time extent to study the theory at temperatures of order 4Tc and we explore how the amount of gradient flow influences the continuum extrapolation.
@article{arxiv.1805.11511,
title = {Estimating $\chi_\mathrm{top}$ Lattice Artifacts from Flowed SU(2) Calorons},
author = {Peter Thomas Jahn and Guy D. Moore and Daniel Robaina},
journal= {arXiv preprint arXiv:1805.11511},
year = {2019}
}