Volume 469 - 31st International Workshop on Deep Inelastic Scattering (DIS2024) - WG2: Small-x, Diffraction and Vector Mesons
Global fits of proton PDFs with non-linear corrections from gluon recombination
P. Duwentäster*, V. Guzey, I. Helenius and H. Paukkunen
*: corresponding author
Full text: pdf
Pre-published on: December 27, 2024
Published on: January 16, 2025
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 $x$. The non-linear evolution is implemented in the HOPPET and 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.
DOI: https://doi.org/10.22323/1.469.0094
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