Lattice simulations with eight flavors of domain wall fermions in SU(3) gauge theory

Appelquist, T, Brower, RC, Fleming, GT, Kiskis, J, Lin, MF, Neil, ET, Osborn, JC, Rebbi, C, Rinaldi, E, Schaich, D ORCID: 0000-0002-9826-2951
et al (show 6 more authors) (2014) Lattice simulations with eight flavors of domain wall fermions in SU(3) gauge theory. PHYSICAL REVIEW D, 90 (11). 114502-.

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We study an SU(3) gauge theory with Nf=8 degenerate flavors of light fermions in the fundamental representation. Using the domain wall fermion formulation, we investigate the light hadron spectrum, chiral condensate and electroweak S parameter. We consider a range of light fermion masses on two lattice volumes at a single gauge coupling chosen so that IR scales approximately match those from our previous studies of the two- and six-flavor systems. Our results for the Nf=8 spectrum suggest spontaneous chiral symmetry breaking, though fits to the fermion mass dependence of spectral quantities do not strongly disfavor the hypothesis of mass-deformed infrared conformality. Compared to Nf=2 we observe a significant enhancement of the chiral condensate relative to the symmetry breaking scale F, similar to the situation for Nf=6. The reduction of the S parameter, related to parity doubling in the vector and axial-vector channels, is also comparable to our six-flavor results.

Item Type: Article
Additional Information: Lattice Strong Dynamics Collaboration keywords: printed, S parameter, read, SU3 fund Nf8
Uncontrolled Keywords: hep-lat, hep-lat, hep-ph
Depositing User: Symplectic Admin
Date Deposited: 09 Mar 2020 09:00
Last Modified: 18 Jan 2023 23:58
DOI: 10.1103/PhysRevD.90.114502
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