Speaker
Dr
Jeremy Green
(Institut für Kernphysik, Johannes Gutenberg-Universität Mainz)
Description
A lattice QCD calculation of the light and strange axial form factors $G_A$ and $G_P$ of the nucleon will be reported. Disconnected diagrams were calculated using hierarchical probing, and a clear nonzero signal was obtained. We pay special attention to renormalization, which we determined nonperturbatively, including the mixing between light and strange quarks. This calculation was done on a single ensemble with 2+1 flavours of stout-smeared Wilson-clover fermions at pion mass 317 MeV and near-physical strange quark mass.
Primary author
Dr
Jeremy Green
(Institut für Kernphysik, Johannes Gutenberg-Universität Mainz)
Co-authors
Dr
Andrew Pochinsky
(Massachusetts Institute of Technology)
Dr
Jesse Laeuchli
(College of William and Mary)
Prof.
John Negele
(Massachusetts Institute of Technology)
Prof.
Kostas Orginos
(College of William and Mary, and Jefferson Lab)
Michael Engelhardt
(New Mexico State University)
Mrs
Nesreen Hasan
(University of Wuppertal)
Dr
Sergey Syritsyn
(Jefferson Lab)
Dr
Stefan Krieg
(Bergische Universität Wuppertal and Forschungszentrum Jülich)
Prof.
Stefan Meinel
(University of Arizona and RIKEN BNL Research Center)
