Investigating the conformal behaviour of SU(2) with one adjoint Dirac flavor

Abstract

We present a major update on our investigations of SU(2) gauge theory with one Dirac flavor in the adjoint representation on the lattice. In particular we consider larger volumes, as well as four different values of the gauge coupling. We provide results for the spectrum including gluonic, fermionic, and hybrid observables, Polyakov loops, and the anomalous dimension of the fermionic condensate from the Dirac mode number. These data confirm that the theory is close to the lower boundary of the conformal window for adjoint fermions. Our investigations provide important insights regarding the realization of different infrared scenarios that have been conjectured for this theory.

19 pages, 10 figures. Version accepted for publication in PRD

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• Notes on Confinement on ${\mathbf{R}}^3\times {\mathbf{S}}^1$: From Yang-Mills, super-Yang-Mills, and QCD(adj) to QCD(F)
• Goldstone Boson Scattering with a Light Composite Scalar
• Spectrum of QCD with one flavor: A window for supersymmetric dynamics
• Exploring gauge theories with adjoint matter on the lattice
• Lattice simulations of adjoint QCD with one Dirac overlap fermion
• SU(2) gauge theory with one and two adjoint fermions towards the continuum limit