paper

Phases Of Adjoint QCD And Dualities

arXiv:1710.03258 · doi:10.21468/SciPostPhys.5.1.007

Abstract

We study 2+1 dimensional gauge theories with a Chern-Simons term and a fermion in the adjoint representation. We apply general considerations of symmetries, anomalies, and renormalization group flows to determine the possible phases of the theory as a function of the gauge group, the Chern-Simons level , and the fermion mass. We propose an inherently quantum mechanical phase of adjoint QCD with small enough , where the infrared is described by a certain Topological Quantum Field Theory (TQFT). For a special choice of the mass, the theory has supersymmetry. There this TQFT is accompanied by a massless Majorana fermion - a Goldstino signaling spontaneous supersymmetry breaking. Our analysis leads us to conjecture a number of new infrared fermion-fermion dualities involving , , and gauge theories. It also leads us to suggest a phase diagram of gauge theories with a fermion in the traceless symmetric/antisymmetric tensor representation of the gauge group.

41 pages, 19 figures; new tests of the proposal and additional references. references added. small additions and typos corrected

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