SymEFT for local tastes of staggered lattice QCD

TL;DR

This paper explores the use of SymEFT to describe lattice artifacts in staggered lattice QCD, focusing on local taste symmetries and their implications for continuum limit behavior.

Contribution

It analyzes the local taste symmetries of unrooted staggered quarks within SymEFT, providing insights into lattice artifacts and continuum limit implications.

Findings

Symmetries of tastes local in spacetime are identified.

Implications for lattice-spacing dependence of spectral quantities discussed.

Framework for understanding lattice artifacts in staggered QCD established.

Abstract

The applicability of Symanzik Effective Field Theory (SymEFT) for the description of lattice artifacts assumes a local formulation of the lattice theory. We discuss the symmetries realised by tastes local in spacetime of unrooted staggered quarks, approaching mass-degenerate 4-flavour QCD in the continuum limit. An outlook on some implications for the asymptotic lattice-spacing dependence is given for spectral quantities as well as local composite fields.