Update on $SU(2)$ with one adjoint Dirac flavor

TL;DR

This paper updates the study of SU(2) gauge theory with one adjoint Dirac flavor, providing new lattice data and analysis to investigate chiral symmetry breaking and spectrum properties.

Contribution

It offers new lattice results at larger volumes, smaller fermion masses, and higher beta, along with refined estimates of the mass anomalous dimension and spectrum analysis.

Findings

Spectrum data for mesons, baryons, glueballs, and hybrid states.

Updated estimates of the mass anomalous dimension.

Discussion on chiral symmetry breaking implications.

Abstract

We present an update of our ongoing study of the SU(2) gauge theory with one flavor of Dirac fermion in the adjoint representation. Compared to our previous results we now have data at larger lattice volumes, smaller values of the fermion mass, and also larger values of $\beta$. We present data for the spectrum of mesons, baryons, glueballs, and the hybrid fermion-glue state, as well as new estimates of the mass anomalous dimension from both finite-size hyperscaling and the Dirac mode number, and discuss the implications of these data for the presence or otherwise of chiral symmetry breaking in this theory.