Journal Article

FZJ-2026-03611

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Taste breaking in the minimally doubled Karsten-Wilczek action and its tree-level improvement

Borsányi, S. ; Capitani, S. ; Fodor, Z.FZJ* ; Godzieba, D. ; Parotto, P. ; Vig, R. A. ; Wong, C. H.

2025
American Physical Society Ridge, NY

This record in other databases:  

Please use a persistent id in citations: doi:10.1103/PhysRevD.111.074510  doi:10.34734/FZJ-2026-03611

Abstract: Minimally doubled fermion actions offer a discretization for two-flavor quantum chromodynamics without rooting, but retaining a U(1) chiral symmetry at the same time. The price to pay is a breaking of the hypercubic symmetry, which requires the inclusion and tuning of new counterterms. Similar to staggered quarks, these actions suffer from taste breaking. We perform a mixed-action numerical study with the Karsten-Wilczek formulation of minimally doubled fermions on 4stout staggered configurations, generated with physical quark masses, covering a broad range of lattice spacings. We consider a tree-level spatial Naik improvement to mitigate discretization errors. We carry out a nonperturbative tuning of the KW action with and without improvement and investigate the taste breaking and the approach to the continuum limit.

---

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)
2. DFG project G:(GEPRIS)496127839 - Phasendiagramm und Phenomenologie des QCD Übergangs (496127839) (496127839)
3. NRW-FAIR (NW21-024-A) (NW21-024-A)

---

Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---