Nucleon generalized form factors from lattice QCD with nearly physical quark masses

TL;DR

This paper computes nucleon generalized form factors using lattice QCD with near-physical quark masses, providing insights into nucleon structure and quark angular momentum.

Contribution

It presents the first lattice QCD determination of nucleon generalized form factors at near-physical pion masses with detailed excited-state analysis.

Findings

Generalized form factors determined at pion mass 150 MeV

Isovector quark angular momentum calculated

Excited-state contamination carefully analyzed

Abstract

We determine generalized form factors of the nucleon from lattice simulations with $N_f = 2$ mass-degenerate non-perturbatively improved Wilson-Sheikholeslami-Wohlert fermions down to a pion mass of 150 MeV. We also present the resulting isovector quark angular momentum. Possible excited-state contaminations are investigated with correlated simultaneous fits.