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We compute the virtual next-to-leading corrections to the Lipatov vertex in the helicity-amplitude formalism. These agree with previous results by Fadin and collaborators, in the conventional dimensional-regularization scheme. We discuss the choice of Reggeization scale in order to minimize its impact on the next-to-leading-logarithmic corrections to the BFKL equation.
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Duca et al. (1999) studied this question.
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