Regular Article - Theoretical Physics
Collinear improvement of the BFKL kernel in the electroproduction of two light vector mesons
Dipartimento di Fisica, Università della Calabria and Istituto Nazionale di Fisica Nucleare, Gruppo collegato di Cosenza, 87036, Arcavacata di Rende, Cosenza, Italy
2 Physics Department, Theory Division, CERN, 1211, Geneva 23, Switzerland
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Published online: 18 December 2007
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.
© Springer-Verlag , 2008