Contribution to a conference proceedings/Contribution to a book

FZJ-2023-05492

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Intra-taste eigenvalue splittings of staggered, Karsten-Wilczek and Borici-Creutz fermions in 2D

Durr, S. (Corresponding author)FZJ* ; Ammer, M. (Corresponding author)

2022
Sissa Medialab Trieste, Italy

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Please use a persistent id in citations: doi:10.22323/1.430.0291  doi:10.34734/FZJ-2023-05492

Abstract: Staggered, Karsten-Wilczek (KW) and Borici-Creutz (BC) fermions all retain a remnant chiral symmetry. The price to be payed is that they are doubled, and the resulting taste symmetry is broken by cut-off effects. We measure the size of the taste symmetry violation by determining the low-lying eigenvalues of these fermion operators in the two-dimensional Schwinger model which admits, like QCD, a global topological charge q∈ℤ of a given gauge configuration. We find that it matters whether the pertinent eigenmode is a would-be zero mode or a non-topological mode. The intra-taste splittings of these fermion formulations are all found to diminish with increasing β. Our goal is to verify standard Symanzik scaling for these taste-breaking effects.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)

Appears in the scientific report 2023

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