Journal
NUCLEAR PHYSICS B
Volume 621, Issue 1-2, Pages 359-387Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0550-3213(01)00563-6
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We discuss the inclusion of running coupling effects in perturbative small x evolution equations. We show that a running coupling BFKL-like x-evolution equation is fully compatible, up to higher twist corrections, with the standard factorized perturbative evolution of par-ton distributions. We then use this result, combined with the well-known Airy asymptotics, to prove that the oscillations which are present in the running-coupling BFKL solution do not affect the associated splitting functions, which instead remain smooth in the small x limit. This allows us to give a prescription to include running-coupling corrections in the small-x resummation of scaling violations. We show that these corrections are small in the HERA region. (C) 2002 Published by Elsevier Science B.V.
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