Domain wall fermions in a waveguide: The phase diagram at large Yukawa coupling
- 15 March 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 51 (6) , 3026-3033
- https://doi.org/10.1103/physrevd.51.3026
Abstract
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.Keywords
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