Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2004-01-22
Nucl.Phys.Proc.Suppl.128:233-239,2004
Physics
High Energy Physics
High Energy Physics - Lattice
Presented by J.Zanotti at the Workshop on Lattice Hadron Physics, Cairns, Australia, 2003. 7pp, 8 figures
Scientific paper
10.1016/S0920-5632(03)02483-6
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.
Boinepalli Sharada
Leinweber Derek B. .
Williams Anthony G.
Zanotti James M.
Zhang Jian-Bo
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