Isolated-photon production in ep collisions at HERA

                       ZEUS Collaboration

                          Abstract

Isolated-photon production has been measured in ep collisions at a 
centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an 
integrated luminosity of 320 pb-1. Measurements of inclusive prompt-photon 
cross sections are presented as functions of the photon transverse energy 
and pseudorapidity in a wide range of exchanged-photon virtuality. In 
addition, differential gamma+jet cross sections are presented as functions 
of the jet transverse energy and pseudorapidity. Leading-logarithm 
parton-shower Monte Carlo predictions and perturbative QCD calculations 
are compared to the data.