The Resummed Gluon Anomalous Dimension and Structure Functions at Small x

Abstract

The impact of the resummed next-to-leading logarithmic small-$x$ contributions to the anomalous dimension ${\gamma }_{gg}$ is evaluated for the unpolarized parton densities and structure functions of the nucleon. These new terms diminish the gluon distribution and overcompensate the contribution caused by the resummed leading logarithmic small-$x$ anomalous dimension and the quarkonic anomalous dimensions beyond next-to-leading order.

Comments: 8 pages latex, including 2 eps figures