Baryon Axial Charges and Momentum Fractions with N_f=2+1 Dynamical Fermions

Abstract

We report on recent results of the QCDSF/UKQCD Collaboration on investigations of baryon structure using configurations generated with N_f=2+1 dynamical flavours of O(a) improved Wilson fermions. With the strange quark mass as an additional dynamical degree of freedom in our simulations we avoid the need for a partially quenched approximation when investigating the properties of particles containing a strange quark, e.g. the hyperons. In particular, we will focus on the nucleon and hyperon axial charges and quark momentum fractions.

arXiv comment7 pages, Talk presented at the XXVIII International Symposium on Lattice Filed Theory, Lattice2010, June 14-19,2010, Villasimius, Sardinia Italy

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• Patterns of flavour symmetry breaking in hadron matrix elements involving u, d and s quarks
• Status of Average-x from Lattice QCD
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