Direct numerical solution of the coordinate space Balitsky-Kovchegov equation at next to leading order

Abstract

We present the first numerical solution to the next to leading order Balitsky-Kovchegov (BK) equation in coordinate space in the large-$N_{\mathrm{c}}$ limit. In addition to the dipole operator we also solve the evolution of the "conformal dipole" for which the conformal invariance breaking double logarithmic term is absent from the evolution equation. The NLO corrections are shown to slow down the evolution. We show that the solution depends strongly on the details of the initial condition, and that the solution to the equation is not positive definite with all initial conditions relevant for phenomenological applications.

arXiv comment8 pages, 10 figures. RevTeX. v2: references added, small clarifications to the text and Figs. 9 and 10, to be published in Phys. Rev. D

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