Electromagnetic Form Factors with FLIC Fermions

Details Electromagnetic Form Factors with FLIC Fermions Electromagnetic Form Factors with FLIC Fermions

2003-09-30

arxiv.org/abs/hep-lat/0309186v1

Nucl.Phys.Proc.Suppl.129:287-289,2004

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2003 (matrix), 3 pages, 3 figures

Scientific paper

10.1016/S0920-5632(03)02558-1

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.

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