Talk presented by Wolfgang Bietenholz

Parallel Session: Chiral Fermions I

Tuesday June 29th, 14.50 - 15.10, Room 7

Improved Overlap Fermions

Abstract: We test exact and approximate Ginsparg-Wilson fermions with respect to their chiral and scaling behavior in the 2-flavor Schwinger model. We first consider explicit approximate GW fermions in a short range, then we proceed to their chiral correction by means of the "overlap formula'', and finally we discuss a numerically efficient perturbative chiral correction. In this way we combine very good chiral and scaling properties with a relatively modest computational effort.

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