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Scaling tests of the improved Kogut-Susskind quark action

The MILC collaboration, C. Bernard, T. Burch, T. A. DeGrand, C. E. DeTar, S. Gottlieb, U. M. Heller, J. Hetrick, K. Orginos, R. L. Sugar, D. Toussaint

hep-latarXiv:hep-lat/9912018

Abstract

Improved lattice actions for Kogut-Susskind quarks have been shown to improve rotational symmetry and flavor symmetry. In this work we find improved scaling behavior of the rho and nucleon masses expressed in units of a length scale obtained from the static quark potential, and better behavior of the Dirac operator in instanton backgrounds.

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