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

Research paper by Gunnar Bali, Sara Collins, Meinulf Göckeler, Rudolf Rödl, Andreas Schäfer, Andre Sternbeck

Indexed on: 19 Jan '16Published on: 19 Jan '16Published in: High Energy Physics - Lattice



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.