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

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

2005-05-14

arxiv.org/abs/hep-ph/0505128v1

Nucl.Phys.B722:65-80,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 9 figures

Scientific paper

10.1016/j.nuclphysb.2005.06.003

The procedure to improve the convergence in transverse momentum space of the NLL BFKL kernel using a w-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.

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