Moments of structure functions for $N_f=2$ near the physical point

Abstract

We report on our on-going study of the lower moments of iso-vector polarised and unpolarised structure functions, $g_A$ and $⟨x{⟩}_{u-d}$, respectively, and the iso-vector scalar and tensor charge, for $N_f=2$ non-perturbatively improved clover fermions. With pion masses which go down to about 150 MeV, we investigate finite volume effects and excited state contributions.

Comments: 7 pages, 4 figures, presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany