English

Properties, ensembles and hadron spectra with Stabilised Wilson Fermions

High Energy Physics - Lattice 2022-01-20 v2

Abstract

In this joint contribution we announce the formation of the "OPEN LATtice initiative", https://openlat1.gitlab.io, to study Stabilised Wilson Fermions (SWF). They are a new avenue for QCD calculations with Wilson-type fermions and we report results on our continued study of this framework: Tuning the clover improvement coefficient, and extending the reach of lattice spacings to a=0.12a=0.12 fm. We fix the flavor symmetric points mπ=mK=412m_\pi=m_K=412 MeV at a=0.055,0.064,0.077,0.094,0.12a=0.055,0.064, 0.077, 0.094, 0.12 fm and define the trajectories to the physical point by fixing the trace of the quark mass matrix. Currently our pion mass range extends down to mπ200m_\pi\sim200 MeV. We outline our tuning goals and strategy as well as our future planned ensembles. First scaling studies are performed on fπf_\pi and mπm_\pi. Additionally results of a preliminary continuum extrapolation of mNm_N at the flavor symmetric point are presented. Going further a first determination of the light and strange hadron spectrum chiral dependence is shown, which serves to check the quality of the action for precision measurements. We also investigate other quantities such as flowed gauge observables to study how the continuum limit is approached. Taken together we observe the SWF enable us to perform stable lattice simulations across a large range of parameters in mass, volume and lattice spacing. Pooling resources our new initiative has made our reported progress possible and through it we will share generated gauge ensembles under an open science philosophy.

Keywords

Cite

@article{arxiv.2201.03874,
  title  = {Properties, ensembles and hadron spectra with Stabilised Wilson Fermions},
  author = {Francesca Cuteri and Anthony Francis and Patrick Fritzsch and Giovanni Pederiva and Antonio Rago and Andrea Shindler and Andre Walker-Loud and Savvas Zafeiropoulos},
  journal= {arXiv preprint arXiv:2201.03874},
  year   = {2022}
}

Comments

18 pages, 8 figures, to be published in Proceedings of Science, contribution to "The 38th International Symposium on Lattice Field Theory (LATTICE 2021)"