Improved bilinears in lattice QCD with non-degenerate quarks

Details Improved bilinears in lattice QCD with non-degenerate quarks Improved bilinears in lattice QCD with non-degenerate quarks

2005-11-04

arxiv.org/abs/hep-lat/0511014v3

Phys.Rev. D73 (2006) 034504

Physics

High Energy Physics

High Energy Physics - Lattice

49 pages, no figures; minor improvements in wording, further typos corrected, published version

Scientific paper

10.1103/PhysRevD.73.034504

We describe the extension of the improvement program for bilinear operators composed of Wilson fermions to non-degenerate dynamical quarks. We consider two, three and four flavors, and both flavor non-singlet and singlet operators. We find that there are many more improvement coefficients than with degenerate quarks, but that, for three or four flavors, nearly all can be determined by enforcing vector and axial Ward identities. The situation is worse for two flavors, where many more coefficients remain undetermined.

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