TL;DR
This paper applies lattice gauge theory methods to SU(3) gauge theories with sextet fermions, revealing an infrared fixed point indicating conformal behavior, which is relevant for beyond Standard Model physics like technicolor.
Contribution
It provides the first Monte Carlo simulation results for SU(3) gauge theory with sextet fermions, showing evidence of an infrared fixed point and conformal dynamics.
Findings
Infrared fixed point suggests conformal behavior
No separation between chiral and confinement scales
Results applicable to technicolor model building
Abstract
The methods of lattice gauge theory may be applied to gauge theories besides QCD, in fact to any gauge group and any representation of matter fields (as long as the coupling is not chiral). Such theories are useful for model building beyond the Standard Model, for instance in technicolor models. We have carried out Monte Carlo simulations of the SU(3) gauge theory with color sextet fermions. Our result for its discrete beta function indicate an infrared fixed point that makes the theory conformal rather than confining. The lattice theory's phase diagram shows no separation of chiral and confinement scales, measured when the quark mass is nonzero.
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