Observing Chiral Nonanalytic Behavior with FLIC Fermions

Details Observing Chiral Nonanalytic Behavior with FLIC Fermions Observing Chiral Nonanalytic Behavior with FLIC Fermions

2003-08-29

arxiv.org/abs/nucl-th/0308083v1

Nucl.Phys.A737:177-181,2004

Physics

Nuclear Physics

Nuclear Theory

Invited talk at FB17, the 17th International Conference on Few-body Problems in Physics, Durham, NC, June 5-10, 2003, 5 pages,

Scientific paper

10.1016/j.nuclphysa.2004.03.060

First results from lattice QCD revealing the chiral nonanalytic behavior of nucleon and Delta baryon magnetic moments are presented. Numerical simulations in the light quark mass regime employing the nonperturbatively O(a)-improved conserved vector current are enabled via FLIC fermions. Quenched chiral perturbation theory for the nucleon and Delta magnetic moments is derived to next to next to leading nonanalytic order. Numerical simulation results for the proton and Delta baryon magnetic moments in quenched QCD reveal dramatic signatures of the quenched meson cloud, which are in accord with the predictions of quenched chiral perturbation theory.

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