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Volume 352 - XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019) - Joint Working Group 2 + Working Group 7: Small-x and Diff + Future of DIS
Collinearly improved impact-parameter dependent Balitsky-Kovchegov evolution
J. Cepila, J.G. Contreras, M. Matas*
*corresponding author
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Pre-published on: 2019 May 23
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The Balitsky-Kovchegov equation has been successfully used to describe a wide range of
processes in diffraction, saturation physics and many others. It has a wide use both in
phenomenology and theory; its solution (the scattering amplitude) has received
significant attention in the past years. However, solutions including the impact-parameter dependence
have been shown to exhibit so-called Coulomb tails, which spoil their use in phenomenology, due to an unphysical growth of the target. In this study we
show, that choosing the recently proposed collinearly improved kernel suppresses the effect
of the Coulomb tails and enables us to describe simultaneously structure function data
as well as vector meson photoproduction.
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