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.

arXiv comment32 pages, many figures

References in corpus (44)

• Properties and uses of the Wilson flow in lattice QCD
• High-precision scale setting in lattice QCD
• Orientifold theory dynamics and symmetry breaking
• Walking in the SU(N)
• Speeding up the Hybrid-Monte-Carlo algorithm for dynamical fermions
• Minimal Walking on the Lattice
• Higher representations on the lattice: numerical simulations. SU(2) with adjoint fermions
• Fundamental Composite (Goldstone) Higgs Dynamics
• Zero of the discrete beta function in SU(3) lattice gauge theory with color sextet fermions
• Evolution of the coupling constant in SU(2) lattice gauge theory with two adjoint fermions
• Hyperscaling relations in mass-deformed conformal gauge theories
• Strongly interacting dynamics and the search for new physics at the LHC
• Conformal vs confining scenario in SU(2) with adjoint fermions
• The infrared dynamics of Minimal Walking Technicolor
• Kaon Matrix Elements and CP-violation from Quenched Lattice QCD: (I) the 3-flavor case
• Can the nearly conformal sextet gauge model hide the Higgs impostor?
• Mass anomalous dimension in SU(2) with two adjoint fermions
• 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
• Light flavor-singlet scalars and walking signals in $N_f=8$ QCD on the lattice
• Running coupling and mass anomalous dimension of SU(3) gauge theory with two flavors of symmetric-representation fermions
• Mesonic spectroscopy of Minimal Walking Technicolor
• Technicolor and other QCD-like theories at next-to-next-to-leading order
• Chronological Inversion Method for the Dirac Matrix in Hybrid Monte Carlo
• Chiral perturbation theory for gradient flow observables
• 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
• Improved Lattice Spectroscopy of Minimal Walking Technicolor
• Thermodynamics of lattice QCD with 2 flavours of colour-sextet quarks: A model of walking/conformal Technicolor
• Fate of the conformal fixed point with twelve massless fermions and SU(3) gauge group
• QCD with light Wilson quarks on fine lattices (II): DD-HMC simulations and data analysis
• Higher-Order Scheme-Independent Series Expansions of ${\gamma }_{\bar{\psi }\psi ,IR}$ and ${\beta }_{IR}^{\prime }$ in Conformal Field Theories
• Large volumes and spectroscopy of walking theories
• Mass anomalous dimension in sextet QCD
• Running coupling in SU(2) gauge theory with two adjoint fermions
• Thermodynamics of lattice QCD with 2 sextet quarks on N_t=8 lattices
• Exploration of SU(N_c) gauge theory with many Wilson fermions at strong coupling
• Electroweak interactions and dark baryons in the sextet BSM model with a composite Higgs particle
• Gradient Flow Coupling in the SU(2) gauge theory with two adjoint fermions
• Ideal Walking Dynamics via a Gauged NJL Model
• The chiral phase transition for lattice QCD with 2 colour-sextet quarks
• Nambu-Jona-Lasinio model with Wilson fermions

Cited by in corpus (6)

• Looking behind the Standard Model with lattice gauge theory
• Into the conformal window: multi-representation gauge theories
• 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
• Weakly coupled conformal gauge theories on the lattice