Physics prospects of UV-filtered overlap quarks

Abstract

Some key features of the overlap operator with a UV-filtered Wilson kernel are discussed. The first part concerns spectral properties of the underlying shifted hermitean Wilson operator and the relation to the observed speedup of the overlap construction. Next, the localization of the filtered overlap and its axial-vector renormalization constant are discussed. Finally, results of an exploratory scaling study for $m_{ud},m_s$ and $f_{\pi },f_K$ are presented.

Comments: Talk given at Workshop on Computational Hadron Physics, Nicosia, Cyprus, 14-17 Sep 2005