Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-11-27
Nucl.Phys. B546 (1999) 480-494
Physics
High Energy Physics
High Energy Physics - Theory
Some of the statements were made more precise, and a footnote was added. To be published in Nuclear Physics B. 19 pages
Scientific paper
10.1016/S0550-3213(99)00042-5
We study the implications of the index theorem and chiral Jacobian in lattice gauge theory, which have been formulated by Hasenfratz, Laliena and Niedermayer and by L\"{u}scher, on the continuum formulation of the chiral Jacobian and anomaly. We take a continuum limit of the lattice Jacobian factor without referring to perturbative expansion and recover the result of continuum theory by using only the general properties of the lattice Dirac operator. This procedure is based on a set of well-defined rules and thus provides an alternative approach to the conventional analysis of the chiral Jacobian and related anomaly in continuum theory. By using an explicit form of the lattice Dirac operator introduced by Neuberger, which satisfies the Ginsparg-Wilson relation, we illustrate our calculation in some detail. We also briefly comment on the index theorem with a finite cut-off from the present viewpoint.
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