Contribution to a conference proceedings/Contribution to a book

PUBDB-2025-02133

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Gauge field smearing and controlled continuum extrapolations

Risch, A. (Corresponding author)DESY*

2024
Sissa Medialab Trieste, Italy

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Please use a persistent id in citations: doi:10.22323/1.451.0022

Report No.: DESY-24-074; arXiv:2410.02794

Abstract: When designing lattice actions, gauge field smearing is often used in the definition of the lattice Dirac operator. Too much smearing can result in uncontrolled continuum extrapolations as the short distance behaviour of the theory is mutilated, which is a situation to be avoided. As a smearing prescription we focus on the gradient flow formalism as it allows to study both smearing and physical flow simultaneously. We investigate the effect of smearing and physical flow on the scaling towards the continuum limit in pure gauge theory. We focus on the example of Creutz ratios, which provide a measure of the physical forces felt by the fermions. For suitable smearing strengths we further investigate the impact of replacing the Wilson gradient flow by stout smearing.

Note: cc-by-nc-nd10 pages, 5 figures, proceedings to talk presented at the European network for Particle physics, Lattice field theory and Extreme computing (EuroPLEx2023), 11-15 September 2023, Berlin, Germany

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Contributing Institute(s):

1. Zeuthen Particle PhysicsTheory (Z_ZPPT)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

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