Photoproduction of the isolated photon at HERA in NLO QCD

Abstract

The NLO QCD calculation for the photoproduction of the isolated photon with a large pT at the HERA ep collider is presented. The single resolved photon contribution and the QCD corrections of order alpha_s to the Born term are consistently included. The NNLO contributions, the box and the double resolved photon subprocesses, are sizeable and are taken into account in addition. The importance of the isolation cut, as well as the influence of other experimental cuts on pT and final photon rapidity distributions are discussed in detail. The investigation of the renormalization scale dependence is performed in order to estimate the size of missing higher order QCD corrections. Results are compared with experimental data and with the prediction of a different NLO calculation.

latex file, 16 pages, 14 ps figures, formulae corrected, small improvements in the text

References in corpus (3)

• Isolated prompt photon photoproduction at NLO
• Is a Large Intrinsic k_T Needed to Describe Photon + Jet Photoproduction at HERA?
• Study of the effective transverse momentum of partons in the proton using prompt photons in photoproduction at HERA

Cited by in corpus (15)

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• Study of non-collinear parton dynamics in the prompt photon photoproduction at HERA
• Isolated photon + jet photoproduction as a tool to constrain the gluon distribution in the proton and the photon
• High Energy Photoproduction
• Production of pizero and eta mesons at large transverse momenta in pi-p and pi-Be interactions at 515 GeV/c
• Photoproduction of isolated photons at HERA in NLO QCD
• Prompt photon production in photoproduction, DIS and hadronic collisions
• Real and Virtual Photoproduction of Large-pt Particles at NLO
• Prompt-photon plus jet photoproduction with ZEUS at DESY HERA in the parton Reggeization approach
• On QCD analysis of stucture function $F_2^{\gamma }$ in alternative approach