A note on the exact lattice chiral symmetry in the overlap formalism

Details A note on the exact lattice chiral symmetry in the overlap formalism A note on the exact lattice chiral symmetry in the overlap formalism

1998-10-10

arxiv.org/abs/hep-lat/9810024v1

Physics

High Energy Physics

High Energy Physics - Lattice

22pages, LaTeX2e

Scientific paper

Using the grassman-number-integral representation of the vacuum overlap formula, it is shown that the symmetry of the auxiliary quantum fermion system in the overlap formalism induces exact chiral symmetry of the action of the type given by Luscher under the chiral transformation $\delta \psi_n = \gamma_5(1-a D)\psi_n$ and $ \delta \bar \psi_n = \bar \psi_n \gamma_5$. With this relation, we consider the connection between the covariant form of the anomaly discussed in the context of the overlap formula and the axial anomaly associated to the exact chiral symmetry in the action formalism. The covariant gauge current in the overlap formalism is translated to the action formalism and its explicit expression is obtained.

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