Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

Isolated photons with high transverse energy have been studied in deep in-elastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb(-1) in the range of exchanged-photon virtuality 10-350 GeV2. Outgoing isolated photons with transverse energy 4 < E-T(gamma) < 15 GeV and pseudorapidity -0.7 < eta(gamma) < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2 : 5 < E-T(jet) < 35 GeV and -1.5 < eta(jet) < 1.8, respectively. Differential cross sections are presented for the following variables: the fraction of the incoming photon energy and momentum that is transferred to the outgoing photon and the leading jet; the fraction of the incoming proton energy transferred to the photon and leading jet; the differences in azimuthal angle and pseudorapidity between the outgoing photon and the leading jet and between the outgoing photon and the scattered electron. Comparisons are made with theoretical predictions: a leading-logarithm Monte Carlo simulation, a next-to-leading-order QCD prediction, and a prediction using the k(T)-factorisation approach.