Conformal symmetry vs. chiral symmetry breaking in the SU(3) sextet model

Abstract

We present new results for the SU(3) "sextet model" with two flavors transforming according to the two-index symmetric representation of the gauge group. The simulations are performed using unimproved Wilson fermions. We measure the meson and baryon spectrum of the theory for multiple bare quark masses at two different lattice spacings. To address the pressing issue of whether the model is inside or below the conformal window, we compare the spectrum to the expectations for a theory with spontaneous chiral symmetry breaking and to those of an IR conformal theory. Regardless of the answer (conformal or chirally broken), the theory is a cornerstone in our understanding of near-conformal and composite dynamics, ranging from Technicolor models to unparticle physics. It is also interesting for the composite dynamics of vector-like singlets with respect to the Standard Model interactions.

Talk presented at the 33rd International Symposium on Lattice Field Theory, 14-18 July 2015, Kobe International Conference Center, Kobe, Japan

References in corpus (5)

• Scaling relations for the entire spectrum in mass-deformed conformal gauge theories
• Conformal Window of Gauge Theories with Four-Fermion Interactions and Ideal Walking
• The renormalization group step scaling function of the 2-flavor SU(3) sextet model
• The running coupling of the minimal sextet composite Higgs model
• Baryon spectrum in the composite sextet model

Cited by in corpus (2)

• Strong dynamics, composite Higgs and the conformal window
• Non-perturbative O(a) improvement of the SU(3) sextet model