Measurement of dijet photoproduction in association with a leading neutron with ZEUS at HERA

The cross section of dijet photoproduction in association with a leading 
neutron, e+ p -> e+ n j j X, was measured with the ZEUS detector using 
an integrated luminosity of 45.4 pb-1. Leading neutron energy and momentum 
spectra were measured for neutron energies E_n > 180 GeV, and neutron 
production angles theta_n < 0.75 mrad. The fraction of dijet events with 
a leading neutron in the final state was studied as a function of the 
jet kinematic variables. Predictions of a one-pion-exchange model are 
compared to the data.