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

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

2010-01-26

arxiv.org/abs/1001.4782v1

Phys.Rev.D81:094034,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures

Scientific paper

10.1103/PhysRevD.81.094034

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.

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