Domain wall fermion and chiral gauge theories on the lattice with exact gauge invariance
Author:
- Yoshio KikukawaYKYoshio Kikukawa
- 15 March 2002
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 65 (7)
Abstract
We discuss how to construct anomaly-free chiral gauge theories on the lattice with exact gauge invariance in the framework of domain wall fermion. Chiral gauge coupling is realized by introducing a five-dimensional gauge field which interpolates between two different four-dimensional gauge fields at boundaries. The five-dimensional dependence is compensated by a local and gauge-invariant counter term. The cohomology problem to obtain the counter term is formulated in 5+1 dimensional space, using the Chern-Simons current induced from the five-dimensional Wilson fermion. We clarify the connection to the invariant construction based on the Ginsparg-Wilson relation using overlap Dirac operator. Formula for the measure and the effective action of Weyl fermions are obtained in terms of five-dimensional lattice quantities.Comment: 46 pages, LaTeX, references added and updated, minor text correctionKeywords
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