Prompt photons at HERA

Peter John Bussey


The ZEUS detector at HERA has been used to measure the photoproduction
of isolated photons in diffractive photoproduction events and deep inelastic
scattering (DIS). In the diffractive analysis, cross sections were compared to
predictions from the RAPGAP Monte Carlo simulation. First evidence is seen
for the direct-photon direct-Pomeron interaction. Cross sections in DIS were
evaluated for a number of kinematic two-particle variables and compared to
predictions from the AFG and BLZ theoretical models.


HERA; diffraction; photoproduction; deep inelastic scattering; prompt photons; Pomeron

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