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arXiv · 0708.3560

Prompt photon hadroproduction at high energies in off-shell gluon-gluon fusion

S. P. Baranov·A. V. Lipatov·N. P. Zotov
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Abstract

The amplitude for production of a single photon associated with quark pair in the fusion of two off-shell gluons is calculated. The matrix element found is applied to the inclusive prompt photon hadroproduction at high energies in the framework of kt-factorization QCD approach. The total and differential cross sections are calculated in both central and forward pseudo-rapidity regions. The conservative error analisys is performed. We used the unintegrated gluon distributions in a proton which were obtained from the full CCFM evolution equation as well as from the Kimber-Martin-Ryskin prescription. Theoretical results were compared with recent experimental data taken by the D0 and CDF collaborations at Fermilab Tevatron. Theoretical predictions for the LHC energies are given.

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S. P. Baranov, A. V. Lipatov, N. P. Zotov. 2008-02-27. Prompt photon hadroproduction at high energies in off-shell gluon-gluon fusion. https://doi.org/10.1103/physrevd.77.074024

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