Grigorios Chachamis, Martin Hentschinski, José Daniel Madrigal, Agustín Sabio Vera
Lipatov's high-energy effective action is a useful tool for computations in the Regge limit beyond leading order. Recently, a regularisation/subtraction prescription has been proposed that allows to apply this formalism to calculate next-to-leading order corrections in a consistent way. We illustrate this procedure with the computation of the gluon Regge trajectory at two loops.
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http://arxiv.org/abs/1206.5101
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