Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-07-27
Eur.Phys.J.C53:525-532,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 4 figures, uses axodraw.sty; four references added; version published on Eur. Phys. J. C
Scientific paper
10.1140/epjc/s10052-007-0481-6
The use of the BFKL kernel improved by the inclusion of subleading terms generated by renormalization group (RG) analysis has been suggested to cure the instabilities in the behavior of the BFKL Green's function in the next-to-leading approximation (NLA). 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 in the 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 the approaches based on the unimproved kernel.
Caporale Francesco
Papa Alessandro
Vera Agustin Sabio
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