The one loop gluon emission light cone wave function

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http://hdl.handle.net/10138/299819

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Lappi , T & Paatelainen , R 2017 , ' The one loop gluon emission light cone wave function ' , Annals of Physics , vol. 379 , pp. 34-66 . https://doi.org/10.1016/j.aop.2017.02.002

Title: The one loop gluon emission light cone wave function
Author: Lappi, T.; Paatelainen, R.
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2017-04
Language: eng
Number of pages: 33
Belongs to series: Annals of Physics
ISSN: 0003-4916
URI: http://hdl.handle.net/10138/299819
Abstract: Light cone perturbation theory has become an essential tool to calculate cross sections for various small-x dilute-dense processes such as deep inelastic scattering and forward proton-proton and proton-nucleus collisions. Here we set out to do one loop calculations in an explicit helicity basis in the four dimensional helicity scheme. As a first process we calculate light cone wave function for one gluon emission to one-loop order in Hamiltonian perturbation theory on the light front. We regulate ultraviolet divergences with transverse dimensional regularization and soft divergences using a cut-off on longitudinal momentum. We show that when all the renormalization constants are combined, the ultraviolet divergences can be absorbed into the standard QCD running coupling constant, and give an explicit expression for the remaining finite part. (C) 2017 Elsevier Inc. All rights reserved.
Subject: Light cone perturbation theory
Gluon emission
COLOR GLASS CONDENSATE
FRONT QCD
QUANTUM ELECTRODYNAMICS
INFINITE-MOMENTUM
EVOLUTION
RENORMALIZATION
CHROMODYNAMICS
SCATTERING
COLLISIONS
114 Physical sciences
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