Taste violations in the scalar correlator in mixed action simulations

Details Taste violations in the scalar correlator in mixed action simulations Taste violations in the scalar correlator in mixed action simulations

2007-10-02

arxiv.org/abs/0710.0804v1

PoSLAT2007:088,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 3 figures, talk presented at Lattice 2007, to appear in the proceedings

Scientific paper

We study the behavior of the isovector scalar correlator, which is particularly sensitive to lattice artifacts, using domain-wall valence quarks on a staggered sea (generated by the MILC collaboration). We analyze this according to the prediction from chiral perturbation theory determined by Prelovsek, which indicates that the leading unitarity violations come from taste breaking effects. We show that our data behaves in the way predicted by Prelovsek, thus verifying that the largest contribution to the violations of unitarity which arise at finite lattice spacing can be described by the mixed-action chiral perturbation theory.

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