Diffusion into infra-red and unitarization of the BFKL pomeron

Details Diffusion into infra-red and unitarization of the BFKL pomeron Diffusion into infra-red and unitarization of the BFKL pomeron

2001-10-25

arxiv.org/abs/hep-ph/0110325v2

Phys.Rev.D65:074037,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 10 figures, some references corrected

Scientific paper

10.1103/PhysRevD.65.074037

The BFKL pomeron in perturbative QCD is plagued by the lack of unitarity and diffusion into the infra-red region of gluon virtualities. These two problems are intimately related. We perform numerical studies of the evolution equation proposed by Balitsky and Kovchegov which unitarizes the BFKL pomeron. We show how diffusion into the infra-red region is suppressed due to the emergence of a saturation scale and scaling behaviour. We study universality of this phenomenon as well as its dependence on subleading corrections to the BFKL pomeron such as the running coupling and kinematic constraint. These corrections are very important for phenomenological applications.

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