Nonperturbative tuning of $O(a^2)$ improved staggered fermions

Details Nonperturbative tuning of $O(a^2)$ improved staggered fermions Nonperturbative tuning of $O(a^2)$ improved staggered fermions

2001-10-15

arxiv.org/abs/hep-lat/0110120v1

Nucl.Phys.Proc.Suppl.106:777-779,2002

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages. Lattice 2001 proceedings

Scientific paper

10.1016/S0920-5632(01)01840-0

We perform a nonperturbative tuning of the coefficients in the $O(a^2)$ improved action for staggered fermions. The mass splitting for the pions of different doubler flavor is used as a measure of the symmetry breaking effects introduced by $O(a^2)$ discretization errors. We find that the flavor nondegeneracy can be somewhat reduced but not eliminated by such a tuning, indicating the need for new terms in the action to reduce the nondegeneracy.

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