arXiv:1102.3407·v1·High Energy Physics — Lattice
Baryon Axial Charges and Momentum Fractions with N_f=2+1 Dynamical Fermions
M. Göckeler · Ph. Hägler · R. Horsley · Y. Nakamura · D. Pleiter · P. E. L. Rakow · A. Schäfer · G. Schierholz · H. Stüben · F. Winter · J. M. Zanotti
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.
Comments: 7 pages, Talk presented at the XXVIII International Symposium on Lattice Filed Theory, Lattice2010, June 14-19,2010, Villasimius, Sardinia Italy