Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-12-23
PoSDIFF2006:027,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 4 figures; proceedings of DIFFRACTION 2006, Workshop on Diffraction in High-Energy Physics, Milos (Greece), Sep. 5-10
Scientific paper
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.
Ivanov Dmitri Yu.
Papa Alessandro
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