Extrapolations of Lattice Meson Form Factors

Details Extrapolations of Lattice Meson Form Factors Extrapolations of Lattice Meson Form Factors

2006-07-03

arxiv.org/abs/hep-lat/0607001v3

Phys.Rev. D74 (2006) 034514; Erratum-ibid. D74 (2006) 099902

Physics

High Energy Physics

High Energy Physics - Lattice

14pp, discussion and Ref. added for disconnected diagrams

Scientific paper

10.1103/PhysRevD.74.034514

We use chiral perturbation theory to study the extrapolations necessary to make physical predictions from lattice QCD data for the electromagnetic form factors of pseudoscalar mesons. We focus on the quark mass, momentum, lattice spacing, and volume dependence and apply our results to simulations employing mixed actions of Ginsparg-Wilson valence quarks and staggered sea quarks. To determine charge radii at quark masses on the lattices currently used, we find that all extrapolations except the one to infinite volume make significant contributions to the systematic error.

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