The nucleon electromagnetic form factors from Lattice QCD
C. Alexandrou (Univ. of Cyprus), G. Koutsou (Univ. of Cyprus), J. W., Negele (MIT), A. Tsapalis (Univ. of Athens)
TL;DR
This paper computes the nucleon electromagnetic form factors using lattice QCD, comparing quenched and full theories to experimental data, providing insights into nucleon structure.
Contribution
It presents the first detailed lattice QCD calculations of isovector nucleon electromagnetic form factors in both quenched and full QCD with low pion masses.
Findings
Lattice results agree with experimental form factors at low momentum transfer.
Quenched and full QCD results show consistent trends.
Provides data for nucleon structure studies.
Abstract
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.
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