Collinearly improved kernel suppresses Coulomb tails in the impact-parameter dependent Balitsky-Kovchegov evolution

Collinearly improved kernel suppresses Coulomb tails in the impact-parameter dependent Balitsky-Kovchegov evolution

We solved the impact-parameter dependent Balitsky-Kovchegov equation with the recently proposed collinearly improved kernel. We find that the solutions do not present the Coulomb tails that have affected previous studies. We also show that once choosing an adequate initial condition it is possible t...

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Veröffentlicht in:Physical review. D 2019-03, Vol.99 (5)
Hauptverfasser: Cepila, J, Contreras, J G, Matas, M
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Kernels
Parameters
Vector mesons
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Contreras, J G
Matas, M
description We solved the impact-parameter dependent Balitsky-Kovchegov equation with the recently proposed collinearly improved kernel. We find that the solutions do not present the Coulomb tails that have affected previous studies. We also show that once choosing an adequate initial condition it is possible to obtain a reasonable description of HERA data on the structure function of the proton, as well as on the cross section for the exclusive production of a J/ψ vector meson off proton targets. As a further application of the solutions, we computed the impact-parameter dependent Weizsäcker-Williams gluon distribution.
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subjects Kernels
Parameters
Vector mesons
title Collinearly improved kernel suppresses Coulomb tails in the impact-parameter dependent Balitsky-Kovchegov evolution
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