Collinear improvement of the BFKL kernel in the electroproduction of two light vector mesons

Abstract

We test the performance of a RG-improved kernel in the determination of the amplitude of a physical process, the electroproduction of two light vector mesons,in the BFKL approach at the next-to-leading approximation (NLA). We find that a smooth behavior of the amplitude with the center-of-mass energy can be achieved, setting the renormalization and energy scales appearing in the subleading terms to values much closer to the kinematical scales of the process than in approaches based on unimproved kernels.

Comments: 5 pages, 3 figures, presented at the School on QCD, Low x Physics, Saturation and diffraction, Copanello, Italy, July 1-14, 2007