Nucleon structure from 2+1 flavor lattice QCD near the physical point
Department of Physics, Tohoku University, Sendai, Miyagi 980-8578, Japan
2 Department of Physics, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
3 RIKEN Advanced Institute for Computational Science, Kobe, Hyogo 650-0047, Japan
4 Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
5 Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
* Speaker, e-mail: firstname.lastname@example.org
Published online: 26 March 2018
We present an update on our results of nucleon form factors measured on a large-volume lattice (8:1fm)4 at almost the physical point in 2+1 flavor QCD. The configurations are generated with the stout-smeared O(a) improved Wilson quark action and Iwasaki gauge action at β = 1:82, which corresponds to the lattice spacing of 0.085 fm. The pion mass at the simulation point is about 145 MeV. We determine the isovector electric radius and magnetic moment from nucleon electric (GE) and magnetic (GM) form factors. We also report on preliminary results of the axial-vector (FA), induced pseudo-scalar (FP) and pseudo-scalar (GP) form factors in order to verify the axial Ward-Takahashi identity in terms of the nucleon matrix elements, which may be called as the generalized Goldberger-Treiman relation.
© The Authors, published by EDP Sciences, 2018
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