Lattice Investigations of Nucleon Structure at Light Quark Masses

Abstract

Lattice simulations of hadronic structure are now reaching a level where they are able to not only complement, but also provide guidance to current and forthcoming experimental programmes at, e.g. Jefferson Lab, COMPASS/CERN and FAIR/GSI. By considering new simulations at low quark masses and on large volumes, we review the recent progress that has been made in this exciting area by the QCDSF/UKQCD collaboration. In particular, results obtained close to the physical point for several quantities, including electromagnetic form factors and moments of ordinary parton distribution functions, show some indication of approaching their phenomenological values.

Comments: 7 pages, 7 figures. Talk presented at The XXVII International Symposium on Lattice Field Theory, Peking University, Beijing, China, July 26-31 2009