We calculate the connected insertions of the nucleon three-point function to study the first few moments of the unpolarized structure functions of the nucleon. (The disconnected insertions are discussed elsewhere in these proceedings). The calculation employs the CP-PACS/JLQCD 2+1 dynamical clover fermions on a 16^3x32 lattice with lattice spacing a=0.1219 fm. The sequential source technique, using non-zero and zero momentum point nucleon field as the secondary source, is applied enabling a study of different currents at various momentum transfer.
@article{arxiv.0810.3241,
title = {2+1 flavor QCD calculation of <x> and <x^2>},
author = {Devdatta Mankame and Takumi Doi and Terrence Draper and Keh-Fei Liu and Thomas Streuer},
journal= {arXiv preprint arXiv:0810.3241},
year = {2010}
}
Comments
7 pages, 7 figures; Talk given at 26th International Symposium on Lattice Field Field: Lattice 2008, Williamsburg, Virginia, USA, 14-19 Jul 2008