Vector potential versus color charge density in low-x evolution - art. no.014012

We reconsider the evolution equations for multigluon correlators derived by Jalilian-Marian, Kovner, and Weigert. We show how to derive these equation s directly in terms of vector potentials (or color field strength) avoiding the introduction of the concept of color charge density in the intermediat e steps. The two step procedure of deriving the evolution of the charge den sity correlators followed by the solution of classical equations for the ve ctor potentials is shown to be consistent with direct derivation of evoluti on for vector potentials. In the process we correct some computational erro rs of Jalilian-Marian, Kovner, and Weigert and present the corrected evolut ion equations which have a somewhat simpler appearance.