Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-04-09
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, LaTeX, 1 eps-figure is included
Scientific paper
To find the region of applicability of the leading log(1/x) approximation for parton distributions in the small x region and to fix the argument of the QCD running coupling it is necessary to know radiative corrections to the kernel of the BFKL equation. The next-to-leading corrections to the BFKL kernel are expressed in terms of the two-loop correction to the gluon Regge trajectory, one-loop correction to the Reggeon-Reggeon-gluon vertex, and contributions from two-gluon and quark-antiquark production in the quasi-multi-Regge kinematics. We calculate differential and total cross sections of the two gluon production. Differential cross section can be applied for description of two jet production in the quasi-multi-Regge kinematics; the total cross section defines corresponding correction to the BFKL kernel. To escape the infrared divergencies we use dimensional regularization of the Feynman integrals.
Fadin Victor S.
Kotsky M. I.
Lipatov Lev N.
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