arXiv:hep-lat/9805027·v3·High Energy Physics — Lattice
Witten's SU(2) anomaly on the lattice
Abstract
Witten's anomaly for SU(2) with a single I=1/2 Weyl fermion in four dimension is shown to be reproduced by the lattice overlap. The mechanism is based on Berry's phase, and on the analyticity of the matrix by which the overlap is defined.
Comments: additional minor changes, 11 pages, 6 figures, plain TeX with epsf