Parity Invariant Lattice Regularization of Three-Dimensional Gauge-Fermion System

Details Parity Invariant Lattice Regularization of Three-Dimensional Gauge-Fermion System Parity Invariant Lattice Regularization of Three-Dimensional Gauge-Fermion System

1997-03-15

arxiv.org/abs/hep-th/9703109v3

Nucl.Phys. B508 (1997) 371-387

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, TeX, 3 eps figures; Conclusions on the global gauge anomaly has changed following a recent paper by Kikukawa and Neu

Scientific paper

10.1016/S0550-3213(97)00630-5

In three dimensions, the effective action for the gauge field induced by integrating out a massless Dirac fermion is known to give either a parity-invariant or a parity-violating result, depending on the regularization scheme. We construct a lattice formulation of the massless Dirac fermion using the overlap formalism. We show that the result is parity invariant in contrast to the formulation using Wilson fermions in the massless limit. This facilitates a non-perturbative study of three-dimensional massless Dirac fermions interacting with a gauge field in a parity invariant setting with no need for fine-tuning.

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