The nucleon electromagnetic form factors from Lattice QCD
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We evaluate the isovector nucleon electromagnetic form factors in quenched and full QCD on the lattice using Wilson fermions. In the quenched theory we use a lattice of spatial size 3 fm at beta=6.0 enabling us to reach low momentum transfers and a lowest pion mass of about 400 MeV. In the full theory we use a lattice of spatial size 1.9 fm at beta=5.6 and lowest pion mass of about 380 MeV enabling comparison with the results obtained in the quenched theory. We compare our lattice results to the isovector part of the experimentally measured form factors.
Typos corrected, one reference added, version accepted for publication in Phys. Rev. D, 14 pages, 20 figures
Typos corrected, one reference added, version accepted for publication in Phys. Rev. D, 14 pages, 20 figures