Running coupling of the sextet composite Higgs model

Abstract

The scale-dependent renormalized coupling of SU(3) gauge theory coupled to Nf = 2 flavors of massless Dirac flavors in the sextet representation is presented in the range 0 < g^2 < 6.5. This range includes the location where the beta-function turns zero in the MSbar scheme to 3-loop and 4-loop approximations, however our non-perturbative result shows a monotonically increasing beta-function. Our lattice calclulations are carried out at several lattice spacings allowing for a controlled continuum extrapolation. We also comment on a recent similar calculation by Hasenfratz tet al.

Proceedings of the 33rd International Symposium on Lattice Field Theory - Lattice 2015 - July 14-18 2015, Kobe, Japan

References in corpus (11)

• Ab-initio Determination of Light Hadron Masses
• Ab initio calculation of the neutron-proton mass difference
• Perturbative analysis of the gradient flow in non-abelian gauge theories
• Higher-Loop Corrections to the Infrared Evolution of a Gauge Theory with Fermions
• The lattice gradient flow at tree-level and its improvement
• Symanzik improvement of the gradient flow in lattice gauge theories
• The Yang-Mills gradient flow in finite volume
• The renormalization group step scaling function of the 2-flavor SU(3) sextet model
• The gradient flow running coupling scheme
• On O($a^2$) effects in gradient flow observables
• Can a light Higgs impostor hide in composite gauge models?