  Differential cross sections for dijet photoproduction in association with a
leading neutron using the reaction e^+ + p --> e^+ + n + jet + jet + X_r have
been measured with the ZEUS detector at HERA using an integrated luminosity of
6.4 pb^{-1}. The fraction of dijet events with a leading neutron in the final
state was studied as a function of the jet kinematic variables. The cross
sections were measured for jet transverse energies E^{jet}_T > 6 GeV, neutron
energy E_n > 400 GeV, and neutron production angle theta_n < 0.8 mrad. The data
are broadly consistent with factorization of the lepton and hadron vertices and
with a simple one-pion-exchange model.
