The 2+1 flavor topological susceptibility from the asqtad action at 0.06 fm

TL;DR

This paper presents new lattice QCD data on topological susceptibility using the asqtad action at a fine lattice spacing, comparing results with chiral perturbation theory and previous coarser lattice data.

Contribution

It provides new high-precision measurements of topological susceptibility at 0.06 fm lattice spacing, testing the asqtad action's accuracy with rooted staggered flavors.

Findings

Data close to continuum extrapolated values at fine lattice spacing

Agreement with rooted staggered chiral perturbation theory as pion mass approaches zero

Further validation of the asqtad action for topological studies

Abstract

We report new data for the topological susceptibility computed on 2+1 flavor dynamical configurations with lattice spacing 0.06 fm, generated with the asqtad action. The topological susceptibility is computed by HYP smearing and compared with rooted staggered chiral perturbation theory as the pion mass goes to zero. At 0.06 fm, the raw data is already quite close to the continuum extrapolated values obtained from coarser lattices. These results provide a further test of the asqtad action with rooted staggered flavors.