Renormalization constants for Wilson fermion lattice QCD with four dynamical flavours

TL;DR

This paper reports on the non-perturbative calculation of renormalization constants for Wilson fermion lattice QCD with four dynamical flavours, including methods to reduce artifacts and preliminary results at a specific lattice spacing.

Contribution

It introduces a method to remove O(a) artifacts and extrapolate renormalization constants to the chiral limit in four-flavour lattice QCD simulations.

Findings

Preliminary renormalization constants computed at one lattice spacing.

Method for artifact removal and chiral extrapolation discussed.

Simulations performed at multiple quark mass parameters.

Abstract

We report on an ongoing non-perturbative computation of RI-MOM scheme renormalization constants for the lattice action with four dynamical flavours currently in use by ETMC. For this goal dedicated simulations with four degenerate sea quark flavours are performed at several values of the standard and twisted quark mass parameters. We discuss a method for removing possible O(a) artifacts at all momenta and extrapolating renormalization constant estimators to the chiral limit. We give preliminary results at one lattice spacing.