Deep inelastic prompt photon production at HERA in the kt-factorization approach

Abstract

We investigate the prompt photon production in deep inelastic scattering at HERA in the framework of kt-factorization QCD approach. Our study is based on the off-shell partonic amplitude e q* -> e gamma q, where the photon radiation from the leptons as well as from the quarks is taken into account. The unintegrated quark densities in a proton are determined using the Kimber-Martin-Ryskin prescription. The conservative error analisys is performed. We investigate both inclusive and jet associated prompt photon production rates. Our predictions are compared with the recent experimental data taken by the H1 and ZEUS collaborations. We demonstrate that in the kt-factorization approach the contribution from the quark radiation subprocess (QQ mechanism) is enhanced as compared to the leading-order collinear approximation.

18 pages, 7 figures

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Cited by in corpus (11)

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• Study of non-collinear parton dynamics in the prompt photon photoproduction at HERA
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• A new phenomenological Investigation of $KMR$ and $MRW$ $unintegrated$ parton distribution functions
• $KMR$ $k_t$-factorization procedure for the description of the $LHCb$ forward hadron-hadron $Z^0$ production at $\sqrt{s}=13TeV$
• A detail study of the LHC and TEVATRON hadron-hadron prompt-photon pair production experiments in the angular ordering constraint k_t-factorization approaches
• Measurement of isolated photons accompanied by jets in deep inelastic ep scattering
• Isolated prompt photon pair production at hadron colliders with kt-factorization
• Phenomenology of kt-factorization for inclusive top quark pair production at hadron colliders
• The analysis of Drell-Yan lepton pair production in the P-P(P) colliders using different angular ordering constraints and $k_t$-factorization approach