The SU(3) Sextet Model with Wilson Fermions

Abstract

We investigate the spectrum and IR properties of the SU(3) "sextet" model with two Dirac fermions in the two-index symmetric representation via lattice simulations. This model is a prime candidate for a realization of Walking Technicolor, which features a minimal matter content and it is expected to be inside or very close to the lower boundary of the conformal window. We use the Wilson discretization for the fermions and map the phase structure of the lattice model. We study several spectral and gradient flow observables both in the bulk and the weak coupling phases. While in the bulk phase we find clear signs of chiral symmetry breaking, in the weak coupling phase there is no clear indication for it, and instead the chiral limit of the model seems compatible with an IR-conformal behavior.

32 pages, many figures

References in corpus (11)

• High-precision scale setting in lattice QCD
• Zero of the discrete beta function in SU(3) lattice gauge theory with color sextet fermions
• The infrared dynamics of Minimal Walking Technicolor
• Spectrum of SU(2) lattice gauge theory with two adjoint Dirac flavours
• Phase structure of SU(3) gauge theory with two flavors of symmetric-representation fermions
• Infrared fixed point in SU(2) gauge theory with adjoint fermions
• Scaling relations for the entire spectrum in mass-deformed conformal gauge theories
• Conformal Window of Gauge Theories with Four-Fermion Interactions and Ideal Walking
• Use of stochastic sources for the lattice determination of light quark physics
• Fate of the conformal fixed point with twelve massless fermions and SU(3) gauge group
• Nambu-Jona-Lasinio model with Wilson fermions

Cited by in corpus (3)

• Tantalizing dilaton tests from a near-conformal EFT
• Beyond the Standard Model: Charting Fundamental Interactions via Lattice Simulations
• Non-perturbative O(a) improvement of the SU(3) sextet model