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Prompt photons in photoproduction at HERA II |
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| Abstract |
Prompt photon cross sections are measured for photons with a transverse energy
of the photon in the range 6 < E_T^gamma < 15 GeV and pseudorapidity range
-1.0 < ta^gamma < 2.4. Cross sections for prompt photon events with an
additional hadronic jet are measured as a function of the transverse energy
and pseudorapidity of the jet and of the momentum fractions x_gamma and
x_proton of the incident photon and proton carried by the constituents
participating in the hard scattering process. Additionaly, the transverse
correlation between the photon and the jet is studied. The results are compared
with predictions of a next-to-leading order calculation and a calculation based
on the $k_T$ factorisation approach. |
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