Nonperturbative β function of eight-flavor SU(3) gauge theory

Hasenfratz, Anna, Schaich, David ORCID: 0000-0002-9826-2951 and Veernala, Aarti (2015) Nonperturbative β function of eight-flavor SU(3) gauge theory JOURNAL OF HIGH ENERGY PHYSICS, 2015 (6). 143-. ISSN 1029-8479, 1029-8479

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Abstract

Abstract: We present a new lattice study of the discrete β function for SU(3) gauge theory with N<inf>f</inf> = 8 massless flavors of fermions in the fundamental representation. Using the gradient flow running coupling, and comparing two different nHYP-smeared staggered lattice actions, we calculate the 8-flavor step-scaling function at significantly stronger couplings than were previously accessible. Our continuum-extrapolated results for the discrete β function show no sign of an IR fixed point up to couplings of g² ≈ 14. At the same time, we find that the gradient flow coupling runs much more slowly than predicted by two-loop perturbation theory, reinforcing previous indications that the 8-flavor system possesses nontrivial strongly coupled IR dynamics with relevance to BSM phenomenology.

Item Type:	Article
Additional Information:	keywords: printed, read, SU3 fund Nf8, step scaling, gradient flow
Uncontrolled Keywords:	Lattice Gauge Field Theories, Renormalization Group, Technicolor and Composite Models
Depositing User:	Symplectic Admin
Date Deposited:	09 Mar 2020 09:03
Last Modified:	16 Jun 2026 11:20
DOI:	10.1007/JHEP06(2015)143
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3078189
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