The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a) improvement and allows efficient access to the light quark-mass regime. FLIC fermions enable the construction of the nonperturbatively O(a)-improved conserved vector current without the difficulties associated with the fine tuning of the improvement coefficients. The simulations are performed with an O(a^2) mean-field improved plaquette-plus-rectangle gluon action on a 20^3 x 40 lattice with a lattice spacing of 0.128 fm, enabling the first simulation of baryon form factors at light quark masses on a large volume lattice. Magnetic moments, electric charge radii and magnetic radii are extracted from these form factors, and show interesting chiral nonanalytic behavior in the light quark mass regime.
@article{arxiv.hep-lat/0309186,
title = {Electromagnetic Form Factors with FLIC Fermions},
author = {J. M. Zanotti and D. B. Leinweber and A. G. Williams and J. B. Zhang},
journal= {arXiv preprint arXiv:hep-lat/0309186},
year = {2010}
}