Running coupling in SU(2) with adjoint fermions

TL;DR

This paper measures the running coupling in SU(2) gauge theory with adjoint fermions using lattice simulations, confirming a non-trivial fixed point through continuum limit analysis.

Contribution

It provides the first robust continuum limit measurement of the Schrödinger Functional running coupling in this theory with improved lattice techniques.

Findings

Confirmation of a non-trivial fixed point in the theory

Use of HEX smearing and clover improvement to reduce discretization errors

Robust continuum limit for the step scaling

Abstract

We present a measurement of the Schr\"odinger Functional running coupling in SU(2) lattice gauge theory with adjoint fermions. We use HEX smearing and clover improvement to reduce the discretization effects. We obtain a robust continuum limit for the step scaling, which confirms the existence of a non-trivial fixed point.