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arXiv · 1302.0773

Taste-split staggered actions: eigenvalues, chiralities and Symanzik improvement

Stephan Durr
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Abstract

The eigenvalue spectra of staggered fermions with an Adams and/or Hoelbling mass term are studied. The chiralities of the eigenmodes reflect whether the chirality linked to the unflavored approximate (γ_5 \times 1) or the flavored exact (γ_5 \times ξ_5) staggered symmetry is considered, and which one of the RR, LR, RL, LL eigenmode definitions is used. In either case a sensitivity to the topological charge of the gauge background is found. We discuss how to remove the leading cut-off effects of these actions by means of a properly tuned improvement term and/or the overlap procedure. The combination of Symanzik improvement and link smearing radically improves the properties of the physical branch.

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Stephan Durr. 2013-07-26. Taste-split staggered actions: eigenvalues, chiralities and Symanzik improvement. https://doi.org/10.1103/physrevd.87.114501

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