Domain wall fermions in a waveguide: the phase diagram at large Yukawa coupling

Details Domain wall fermions in a waveguide: the phase diagram at large Yukawa coupling Domain wall fermions in a waveguide: the phase diagram at large Yukawa coupling

1994-09-16

arxiv.org/abs/hep-lat/9409013v1

Phys.Rev. D51 (1995) 3026-3033

Physics

High Energy Physics

High Energy Physics - Lattice

Wash. U. HEP/94-61, WIS-94/37-PH, uses jnl macropackages

Scientific paper

10.1103/PhysRevD.51.3026

In this paper we return to a model with domain wall fermions in a waveguide. This model contains a Yukawa coupling $y$ which is needed for gauge invariance. A previous paper left the analysis for large values of this coupling incomplete. We fill the gap by developing a systematic expansion suitable for large $y$, and using this, we gain an analytic understanding of the phase diagram and fermion spectrum. We find that in a sense all the species doublers come back for large $y$. The conclusion that no lattice chiral gauge theory can be obtained from this approach therefore remains valid.

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