Observing Chiral Nonanalytic Behavior with FLIC Fermions
نویسندگان
چکیده
First results from lattice QCD revealing the chiral nonanalytic behavior of nucleon and ∆ 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 ∆ magnetic moments is derived to next to next to leading nonanalytic order. Numerical simulation results for the proton and ∆ 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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