Further studies of the photoproduction of isolated photons with a jet at HERA
Streszczenie
In this extended analysis using the ZEUS detector at HERA, the photoproduction of isolated
photons together with a jet is measured for different ranges of the fractional photon energy,
x_γ^{meas}, contributing to the photon-jet final state. Cross sections are evaluated in the
photon transverse-energy and pseudorapidity ranges 6 < E_T^γ < 15 GeV and −0.7 < η^γ < 0.9,
and for jet transverse-energy and pseudorapidity ranges 4 < E_T^{jet} < 35 GeV and −1.5 < η^{jet} < 1.8,
for an integrated luminosity of 374 pb^{−1}. The kinematic observables studied
comprise the transverse energy and pseudorapidity of the photon and the jet, the azimuthal
difference between them, the fraction of proton energy taking part in the interaction, and
the difference between the pseudorapidities of the photon and the jet. Higher-order
theoretical calculations are compared to the results.
Instytucja finansująca badania
We appreciate the contributions to the construction, maintenance and operation of the ZEUS detector made by many people who are not listed as authors. The HERA machine group and the DESY computing staff are especially acknowledged for their success in providing excellent operation of the collider and the data-analysis environment. We thank the DESY directorate for their strong support and encouragement. We also thank M. Fontannaz, G. Heinrich, A. Lipatov, M. Malyshev and N. Zotov for providing assistance and theoretical results. Article funded by SCOAP3Collections
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