Exceptional Configurations with the Clover Action

Details Exceptional Configurations with the Clover Action Exceptional Configurations with the Clover Action

1998-09-14

arxiv.org/abs/hep-lat/9809099v1

Nucl.Phys.Proc.Suppl. 73 (1999) 506-508

Physics

High Energy Physics

High Energy Physics - Lattice

LATTICE98(improvement)

Scientific paper

10.1016/S0920-5632(99)85119-6

We study exceptional modes of both the Wilson and the clover action in order to understand why quenched clover spectroscopy suffers so severely from exceptional configurations. We show that a large clover coefficient can make the exceptional modes extremely localized and thus very sensitive to short distance fluctuations. We contrast this with the case of the Wilson action where exceptional modes correspond to large instantons. These modes are broadly extended and suffer much less from discretization errors.

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