13 research outputs found
Nucleon structure from 2+1 flavor lattice QCD near the physical point
We present an update on our results of nucleon form factors measured on a
large-volume lattice at almost the physical point in 2+1
flavor QCD. The configurations are generated with the stout-smeared
improved Wilson quark action and Iwasaki gauge action at
, which corresponds to the lattice spacing of 0.085 fm. The pion
mass at the simulation point is about 145 MeV. We determine the iso- vector
electric radius and magnetic moment from nucleon electric () and magnetic
() form factors. We also report on preliminary results of the axial-vector
(), induced pseudo-scalar () and pseudo-scalar () 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.Comment: 8 pages, 12 figures; talk presented at the 35th International
Symposium on Lattice Field Theory, 18-24 June 2017, Granada, Spai
Nucleon form factors on a large volume lattice near the physical point in 2+1 flavor QCD
We present results for the isovector nucleon form factors measured on a 964 lattice at almost the physical pion mass with a lattice spacing of 0.085 fm in 2+1 flavor QCD. The configurations are generated with the stout-smeared O(a)-improved Wilson quark action and the Iwasaki gauge action at β=1.82. The pion mass at the simulation point is about 146 MeV. A large spatial volume of (8.1 fm)3 allows us to investigate the form factors in the small momentum transfer region. We determine the isovector electric radius and magnetic moment from nucleon electric (GE) and magnetic (GM) form factors as well as the axial-vector coupling gA. We also report on the results of the axial-vector (FA), induced pseudoscalar (FP) and pseudoscalar (GP) form factors in order to verify the axial Ward-Takahashi identity in terms of the nucleon matrix elements, which may be called the generalized Goldberger-Treiman relation
A Multi-Inner-World Genetic Algorithm Using Multiple Heuristics to Optimize Delivery Schedule
Nucleon structure from 2+1 flavor lattice QCD near the physical point
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