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MAN/HEP/2018/001
CERN-TH-2018-037
IFJPAN-IV-2018-4
UWTHPH-2018-3
MCnet-18-03
MAN-HEP-2018-001
MCNET-18-03
arXiv:1802.08531
JHEP 1805 (2018) 044

by: Ángeles Martínez, René (Cracow, INP) et al.

Abstract:
We consider soft-gluon evolution at the amplitude level. Our evolution includes Coulomb exchanges and applies to generic hard-scattering processes involving any number of coloured partons. We emphasise the special role played by a Lorentz-invariant evolution variable, which coincides with the transverse momentum of the latest emission in a suitably defined dipole zero-momentum frame. We also relate the evolution algorithm, which was used originally in the derivation of super-leading logarithms, to renormalization group evolution equations that have been encountered recently. Handling large colour matrices presents the most significant challenge to numerical implementations and we present a means to expand systematically about the leading colour approximation.
Link: 
http://inspirehep.net/record/1657200
Publ date: 
Monday, February 26, 2018 - 02:30