Collinearly improved impact-parameter dependent Balitsky-Kovchegov evolution

Apr 10, 2019, 5:35 PM
Cavallerizza Reale - Aula Magna

Cavallerizza Reale - Aula Magna

Via Verdi, 9 Turin
Parallel Session Talk WG2: Low-x and Diffraction Joint WG2+WG7: Small-x and Diff + Future of DIS


Marek Matas


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 and its solution (the scattering amplitude) has received
significant attention in the past years. However, the impact-parameter dependent solutions
have been shown to exhibit so-called Coulomb tails, which spoil its
phenomenological use 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 the structure function data
as well as vector meson photo-production. As an example of the application of these new
scattering amplitudes we present the impact-parameter dependent Weiszacker-Williams
gluon distribution which can be measured at the future facilities such as the EIC.

Primary author

Presentation materials