Infrared fixed point of SU(2) gauge theory with six flavors

TL;DR

This paper investigates the infrared behavior of SU(2) gauge theory with six flavors, identifying a stable fixed point and measuring the anomalous dimension, indicating potential near-conformal dynamics relevant for beyond Standard Model physics.

Contribution

It provides the first nonperturbative evidence of an infrared fixed point in SU(2) gauge theory with six flavors and measures the anomalous dimension at this fixed point.

Findings

Identifies an infrared stable fixed point at strong coupling.

Measures the anomalous dimension of the fermion mass operator.

Suggests the theory is near the conformal window boundary.

Abstract

We compute the running of the coupling in SU(2) gauge theory with six fermions in fundamental representation of the gauge group. We establish an infrared stable fixed point at strong coupling and measure also the anomalous dimension of the fermion mass operator at the fixed point. This theory therefore likely lies close to the boundary of the conformal window and will display novel infrared dynamics if coupled with the electroweak sector of the Standard Model.