4.3 Article

An all-poles approximation to collinear resummations in the Regge limit of perturbative

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NUCLEAR PHYSICS B
卷 722, 期 1-2, 页码 65-80

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DOI: 10.1016/j.nuclphysb.2005.06.003

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The procedure to improve the convergence in transverse momentum space of the NLL BFKL kernel using a omega-shift is revisited. An accurate approximation to this shift only depending on transverse momenta is presented. This approximation is based on a Bessel function of the first kind with argument depending on the strong coupling and a double logarithm of the ratio of transverse scales. A comparison between different renormalization schemes is also included. (c) 2005 Elsevier B.V. All rights reserved.

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