Clover improvement for stout-smeared 2+1 flavour SLiNC fermions: non-perturbative results

TL;DR

This paper introduces the SLiNC action with stout smearing for fermion hopping terms and presents non-perturbative results for tuning the clover coefficient, critical hopping parameter, and renormalization constants in lattice QCD.

Contribution

It provides the first non-perturbative determination of the clover coefficient and related parameters for the SLiNC fermion action using the Schrödinger functional method.

Findings

Non-perturbative csw values obtained for the SLiNC action.

Determination of the critical hopping parameter.

Calculation of the renormalization constant for the local vector current.

Abstract

We discuss an action in which the fermion matrix has single level stout smearing for the hopping terms together with unsmeared links for the clover term. With the (tree level) Symanzik improved gluon action this constitutes the Stout Link Non-perturbative Clover or SLiNC action. To cancel O(a) terms the clover coefficient, csw, has to be tuned. We present here preliminary results of a non-perturbative determination of csw using the Schrodinger functional and as a by-product also a determination of the critical hopping parameter. A determination of the renormalisation constant for the local vector current is also given. Comparisons of the results are made with lowest order perturbation theory results.