The amplitude for the forward electroproduction of two light vector mesons can be written completely within perturbative QCD in the Regge limit with next-To-leading accuracy, thus providing the first example of a physical application of the BFKL approach at the next-To-leading order. Recently, a numerical determination of the amplitude has been obtained in the case of equal photon virtualities, by using a definite representation for the amplitude and a definite optimization method for the perturbative series. Here, we study the main systematic effects in the previous determination, by considering a different representation of the amplitude and different optimization methods of the perturbative series. Moreover, we compare our result for the differential cross section at the minimum |t| with a different approach, based on collinear kernel improvement.

NLO BFKL at work: The electroproduction of two light vector mesons

Papa A.
Membro del Collaboration Group
;
2006

Abstract

The amplitude for the forward electroproduction of two light vector mesons can be written completely within perturbative QCD in the Regge limit with next-To-leading accuracy, thus providing the first example of a physical application of the BFKL approach at the next-To-leading order. Recently, a numerical determination of the amplitude has been obtained in the case of equal photon virtualities, by using a definite representation for the amplitude and a definite optimization method for the perturbative series. Here, we study the main systematic effects in the previous determination, by considering a different representation of the amplitude and different optimization methods of the perturbative series. Moreover, we compare our result for the differential cross section at the minimum |t| with a different approach, based on collinear kernel improvement.
High-energy perturbative Quantum Chromodynamics
BFKL resummation
Vector meson electroproduction
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11770/293952
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