  By adopting the nonlinear realization of chiral symmetry, a holographic model
for the baryon octet is proposed. The mass spectra of the baryon octet and
their low-lying excited states are calculated, which show good consistency with
experiments. The couplings of pion to nucleons are derived in two gauges and
are shown to be equivalent with each other. It also shows that only derivative
couplings of pion to nucleons appear in this holographic model. The coupling
constant is then calculated.
