Global fits of proton PDFs with non-linear corrections from gluon recombination
Abstract
We present numerical studies of the leading non-linear corrections to the DGLAP evolution equations of parton distribution functions (PDFs) resulting from gluon recombination, which reduce the pace of evolution at small momentum fractions . The non-linear evolution is implemented in the \textsc{HOPPET} and \textsc{xFitter} toolkits and used to carry out fits of proton PDFs using lepton-proton deep inelastic scattering data from HERA, BCDMS and NMC. While we do not find evidence for non-linear effects, we are able to set upper limits for their strength. We also quantify the potential impact of longitudinal structure function measurements at the Electron-Ion Collider and the Large Hadron Electron Collider on future fits.
Keywords
Cite
@article{arxiv.2406.12936,
title = {Global fits of proton PDFs with non-linear corrections from gluon recombination},
author = {Pit Duwentäster and Vadim Guzey and Ilkka Helenius and Hannu Paukkunen},
journal= {arXiv preprint arXiv:2406.12936},
year = {2024}
}
Comments
to appear in the proceedings of the 31st International Workshop on Deep Inelastic Scattering (DIS2024), 8-12 April 2024, Grenoble, France