Suppression of excited-state effects in lattice determination of nucleon electromagnetic form factors
classification
✦ hep-lat
keywords
factorsformnucleonexcited-stateabilityableapproachingconjunction
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We study the ability of a variety of fitting techniques to extract the ground state matrix elements of the vector current from ratios of nucleon three- and two-point functions that contain contaminations from excited states. Extending our high-statistics study of nucleon form factors, we are able to demonstrate that the treatment of excited-state contributions in conjunction with approaching the physical pion mass has a significant impact on the $Q^2$-dependence of the form factors.
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