EPJ Web Conf.
Volume 175, 201835th International Symposium on Lattice Field Theory (Lattice 2017)
|Number of page(s)||8|
|Section||6 Hadron Structure|
|Published online||26 March 2018|
Nucleon average quark momentum fraction with Nf = 2+1 Wilson fermions
PRISMA Cluster of Excellence and Institut für Kernphysik, Johann-Joachim-Becher-Weg 45, University of Mainz,, 55099 Mainz, Germany
2 Helmholtz Institute Mainz, University of Mainz, 55099 Mainz, Germany
* Speaker, e-mail: firstname.lastname@example.org
Published online: 26 March 2018
We report on an analysis of the average quark momentum fraction of the nucleon and related quantities using Nf = 2 + 1 Wilson fermions. Computations are performed on four CLS ensembles covering three values of the lattice spacing at pion masses down to Mπ ≈ 200 MeV. Several source-sink separations (~ 1:0 fm to ~ 1:4 fm) are used to assess the excited-state contamination. To gain further insight, the generalized pencil-of-functions approach has been implemented to reduce the excited-state contamination in the relevant two-and three-point functions. Preliminary results are shown for the isovector nucleon charges from vector, axial vector and tensor derivative (twist-2) operators.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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