Electromagnetic Form Factors with FLIC Fermions

Preprint

30 September 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-lat/0309186

Abstract

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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Version 1, 2003-09-30, ArXiv
Published version: Nuclear Physics B - Proceedings Supplements, 129-130, 287.

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