The Gauged Thirring Model

Abstract

We propose the gauged Thirring model as a natural gauge-invariant generalization of the Thirring model, four-fermion interaction of current-current type. In the strong gauge-coupling limit, the gauged Thirring model reduces to the recently proposed reformulation of the Thirring model as a gauge theory. Especially, we pay attention to the effect coming from the kinetic term for the gauge boson field, which was originally the auxiliary field without the kinetic term. In 3 + 1 dimensions, we find the nontrivial phase structure for the gauged Thirring model, based on the Schwinger-Dyson equation for the fermion propagator as well as the gauge-invariant effective potential for the chiral order parameter. Within this approximation, we study the renormalization group flows (lines of constant physics) and find a signal for nontrivial continuum limit with nonvanishing renormalized coupling constant and large anomalous dimension for the gauged Thirring model in 3+1 dimensions, at least for small number of flavors $N_f$. Finally we discuss the (perturbatively) renormalizable extension of the gauged Thirring model.

68 pages + 10 figures, LaTeX (figures are not included)

Cited by in corpus (10)

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• Dynamical fermion mass generation at a tricritical point in strongly coupled U(1) lattice gauge theory
• Finite Field-dependent Symmetry in Thirring Model
• Strong coupling limits and quantum isomorphisms of the gauged Thirring model
• Gauged Thirring Model in the Heisenberg Picture
• Electroweak symmetry breaking in other terms
• Excitonic gap generation in thin-film topological insulators
• Effective quantum electrodynamics: One-dimensional model of the relativistic hydrogen-like atom
• Nonperturbative Aspects of the two-dimensional Massive Gauged Thirring Model