Results from 2+1 flavours of SLiNC fermions

TL;DR

This paper presents QCD results using a 2+1 flavour SLiNC fermion action, introducing a mass tuning method that maintains the singlet quark mass fixed, enabling exploration of diverse quark mass regimes and accurate baryon spectrum splittings.

Contribution

It introduces a novel quark mass tuning method for the SLiNC action that addresses renormalisation issues and allows broad quark mass variation.

Findings

Preliminary results show correct baryon spectrum splittings.

The method enables exploration of heavy up-down and light strange quark masses.

The approach successfully reproduces expected QCD mass splittings.

Abstract

QCD results are presented for a 2+1 flavour fermion clover action (which we call the SLiNC action). A method of tuning the quark masses to their physical values is discussed. In this method the singlet quark mass is kept fixed, which solves the problem of different renormalisations (for singlet and non-singlet quark masses) occuring for non-chirally invariant lattice fermions. This procedure enables a wide range of quark masses to be probed, including the case with a heavy up-down quark mass and light strange quark mass. Preliminary results show the correct splittings for the baryon (octet and) decuplet spectrum.