Towards charm physics with stabilised Wilson fermions

TL;DR

This paper explores the use of stabilised Wilson fermions in heavy flavour physics, focusing on fixing the charm quark mass through physical observables and analyzing cut-off effects on large-volume ensembles.

Contribution

It introduces a novel approach to fixing the charm quark mass using different meson masses and updates the determination of the axial current improvement coefficient c_A.

Findings

Successful fixing of charm quark mass using D- and η_c-meson masses

Analysis of cut-off effects on large-volume ensembles

Updated value of the axial current improvement coefficient c_A

Abstract

We report on a first study towards the use of stabilised Wilson fermions in heavy flavour physics. In particular, we are interested in fixing the charm quark mass via various physical observables and to inspect cut-off effects arising from different choices. This is done on large-volume OpenLat ensembles with periodic boundary conditions. Two different ways of fixing the charm quark mass are explored, namely using the mass of the $D$- and $\eta_{\rm c}$-meson as physical inputs. We furthermore give an update on our determination of the non-singlet axial current improvement coefficient $c_{\rm A}$.