A high-statistics study of the nucleon EM form factors, axial charge and quark momentum fraction

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We present updated results for the nucleon axial charge and electromagnetic (EM) form factors, which include a significant increase in statistics for all ensembles (up to 4000 measurements), as well as the addition of ensembles with pion masses down to $m_\pi\sim195$ MeV.

• We also present results for the average quark momentum fraction.
• The new data allows us to perform a thorough study of the systematic effects encountered in the lattice extraction.
• We concentrate on systematic effects due to excited-state contaminations for each of the quantities, which we check using several different time separations between the operators at the source and sink through a comparison of plateau fits and the summed operator insertion method (which provides a mechanism to suppress the excited-state contamination).