  The current status of lattice-QCD numerical calculations by joint LHP, RBC,
and UKQCD collaborations of nucleon isovector vector- and axialvector-current
form factors using a 2+1-flavor dynamical domain-wall fermions lattice QCD
ensemble generated jointly by RBC and UKQCD collaborations are presented. The
lattice spacing is set at about 0.1141(3) fm, and the lattice spatial extent is
48 spacings or about 5.4750(14) fm. The strange and degenerate up and down
quark mass values are set at their essentially physical values to provide the
physical $\Omega$ mass and a degenerate pion mass of 0.1392(2) GeV. Our nucleon
mass estimate is about 0.947(6) GeV. Possible excited-state contaminations in
the calculated vector- and axialvector-current form factors are hidden below
larger statistical noises. The numerical details of the form-factor shape
parameters, such as the mean squared radii, the anomalous magnetic moment, or
the pseudoscalar coupling extracted from the form factors, are described, along
with comparisons of different approaches used to extract them.
