Nucleon structure from 2+1 flavor lattice QCD near the physical point

Understand

We present an update on our results of nucleon form factors measured on a large-volume lattice $(8.1\rm{fm})^4$ at almost the physical point in 2+1 flavor QCD.

• The configurations are generated with the stout-smeared $\mathcal{O}(a)$ improved Wilson quark action and Iwasaki gauge action at $\beta = 1.82$, which corresponds to the lattice spacing of 0.085 fm.
• The pion mass at the simulation point is about 145 MeV.
• We determine the iso- vector electric radius and magnetic moment from nucleon electric ($G_E$) and magnetic ($G_M$) form factors.