PoS(LATTICE 2008)163 Strangeness and glue in the nucleon from lattice QCD Takumi Doi ∗ , Mridupawan Deka, Shao-Jing Dong, Terrence Draper, Keh-Fei Liu and Devdatta Mankame Department of Physics and Astronomy, University of Kentucky, Lexington KY 40506, USA E-mail: doi@pa.uky.edu, mpdeka@pa.uky.edu, s.j.dong@uky.edu, draper@pa.uky.edu, liu@pa.uky.edu, dmmank2@uky.edu Nilmani Mathur Department of Theoretical Physics, Tata Institute of Fundamental Research, Mumbai 40005, India E-mail: nilmani@theory.tifr.res.in Thomas Streuer Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany E-mail: thomas.streuer@physik.uni-regensburg.de χ QCD collaboration We study the strangeness contribution to nucleon matrix elements using N f = 2 + 1 dynamical clover fermion configurations generated by the CP-PACS/JLQCD collaboration. In order to eval- uate the disconnected insertion (DI), we use the Z(4) stochastic method, along with unbiased subtraction from the hopping parameter expansion which reduces the off-diagonal noises in the stochastic method. Furthermore, we find that using many nucleon sources for each configuration is effective in improving the signal. Our results for the quark contribution to the first moment 〈x〉 q in the DI, and the strangeness magnetic moment show that the statistical errors are under control with these techniques. We also study the gluonic contribution to the nucleon using the overlap operator to construct the gauge field tensor, F μν . The application to the calculation of first moment, 〈x〉 G , gives a good signal in quenched lattice QCD. The XXVI International Symposium on Lattice Field Theory July 14-19 2008 Williamsburg, Virginia, USA ∗ Speaker. c  Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. http://pos.sissa.it/