Universal features of JIMWLK and BK evolution at small x

Details Universal features of JIMWLK and BK evolution at small x Universal features of JIMWLK and BK evolution at small x

2003-09-26

arxiv.org/abs/hep-ph/0309306v1

Nucl.Phys. A739 (2004) 183-226

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages

Scientific paper

10.1016/j.nuclphysa.2004.03.219

In this paper we present the results of numerical studies of the JIMWLK and BK equations with a particular emphasis on the universal scaling properties and phase space structure involved. The results are valid for near zero impact parameter in DIS. We demonstrate IR safety due to the occurrence of a rapidity dependent saturation scale Q_s(\tau). Within the set of initial conditions chosen both JIMWLK and BK equations show remarkable agreement. We point out the crucial importance of running coupling corrections to obtain consistency in the UV. Despite the scale breaking induced by the running coupling we find that evolution drives correlators towards an asymptotic form with near scaling properties. We discuss asymptotic features of the evolution, such as the \tau- and A-dependence of Q_s away from the initial condition.

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