The perfect action for non-degenerate staggered fermions

Details The perfect action for non-degenerate staggered fermions The perfect action for non-degenerate staggered fermions

1996-10-22

arxiv.org/abs/hep-lat/9610029v2

Nucl.Phys. B490 (1997) 331-348

Physics

High Energy Physics

High Energy Physics - Lattice

14 pages, Latex2e, 1 Latex figure, some minor changes and two references added

Scientific paper

10.1016/S0550-3213(97)00070-9

The perfect action of free staggered fermions is calculated by blocking from the continuum for degenerate and non-degenerate flavor masses. The symmetry structure, connecting flavor transformations and translations, is explained directly from the blocking scheme. It is convenient to use a modified Fourier transformation, respecting this connection, to treat the spin-flavor structure of the blockspins. The perfect action remains local in the non-degenerate case; it is explicitly calculated in two dimensions. I finally comment on the relation of the blocking scheme to the transition from Dirac-K\"ahler fermions to staggered fermions.

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