  In this paper, we study properties of baryons by using a holographic dual of
QCD on the basis of the D4/D8-brane configuration, where baryons are described
by a soliton. We first determine the asymptotic behavior of the soliton
solution, which allows us to evaluate well-defined currents associated with the
U(N_f)_L \times U(N_f)_R chiral symmetry. Using the currents, we compute static
quantities of baryons such as charge radii and magnetic moments, and make a
quantitative test with experiments. It is emphasized that not only the nucleon
but also excited baryons, such as \Delta, N(1440), N(1535) etc., can be
analyzed systematically in this model. We also investigate the form factors and
find that our form factors agree well with the results that are
well-established empirically. With the form factors, the effective
baryon-baryon-meson cubic coupling constants among their infinite towers in the
model can be determined. Some physical implications following from these
results are discussed.
