The Schwinger Model with Perfect Staggered Fermions

Details The Schwinger Model with Perfect Staggered Fermions The Schwinger Model with Perfect Staggered Fermions

1998-10-05

arxiv.org/abs/hep-lat/9810014v1

Nucl.Phys.Proc.Suppl. 73 (1999) 933-935

Physics

High Energy Physics

High Energy Physics - Lattice

LATTICE98(improvement), 3 pages, 5 figures

Scientific paper

10.1016/S0920-5632(99)85249-9

We construct a new perfect action for free staggered fermions, which is more local than the one obtained from the standard block average scheme. This pays off in superior properties after a short ranged truncation. This action is ``gauged by hand'' and tested in Schwinger model simulations by means of a new variant of hybrid MC. Using ``fat links'' for the gauge field, we obtain a tiny ``pion'' mass down to \beta \approx 1.5, and the ``eta'' mass follows very closely the prediction of asymptotic scaling.

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