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, 1506 (6).
143-.
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1410.5886v2.pdf - Author Accepted Manuscript Download (1MB) | Preview |
Abstract
We present a new lattice study of the discrete beta function for SU(3) gauge theory with Nf=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 beta function show no sign of an IR fixed point up to couplings of g^2~14. 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: | 18 Oct 2023 17:04 |
| DOI: | 10.1007/JHEP06(2015)143 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3078189 |
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