One-loop corrections to light cone wave functions : The dipole picture DIS cross section

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http://hdl.handle.net/10138/314227

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Hänninen , H , Lappi , T & Paatelainen , R 2018 , ' One-loop corrections to light cone wave functions : The dipole picture DIS cross section ' , Annals of Physics , vol. 393 , pp. 358-412 . https://doi.org/10.1016/j.aop.2018.04.015

Title: One-loop corrections to light cone wave functions : The dipole picture DIS cross section
Author: Hänninen, H.; Lappi, T.; Paatelainen, R.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
Date: 2018-06
Language: eng
Number of pages: 55
Belongs to series: Annals of Physics
ISSN: 0003-4916
URI: http://hdl.handle.net/10138/314227
Abstract: We develop methods needed to perform loop calculations in light cone perturbation theory using a helicity basis, refining the method introduced in our earlier work. In particular this includes implementing a consistent way to contract the four-dimensional tensor structures from the helicity vectors with d -dimensional tensors arising from loop integrals, in a way that can be fully automatized. We demonstrate this explicitly by calculating the one-loop correction to the virtual photon to quark–antiquark dipole light cone wave function. This allows us to calculate the deep inelastic scattering cross section in the dipole formalism to next-to-leading order accuracy. Our results, obtained using the four dimensional helicity scheme, agree with the recent calculation by Beuf using conventional dimensional regularization, confirming the regularization scheme independence of this cross section.
Subject: Light-cone perturbation theory
QCD
Small-x
DIS
Color glass Condensate
EVOLUTION
REGULARIZATION
114 Physical sciences
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