Large-x power laws of parton distributions remain inconclusive
Abstract
Focusing on hadron scattering at large partonic momentum fractions , we compare nonperturbative QCD predictions for the asymptotic behavior of DIS structure functions and parton distribution functions (PDFs) to the and dependence of phenomenological PDFs. In the CT18 NNLO global QCD analysis, higher-order radiative contributions and functional mimicry of PDF parametrizations result in about one unit of uncertainty in the effective powers of falloff of nucleon PDFs. Similar uncertainties are present in the case of the pion PDF, an object of growing interest in phenomenology.
Keywords
Cite
@article{arxiv.2112.14329,
title = {Large-x power laws of parton distributions remain inconclusive},
author = {Aurore Courtoy and Pavel M. Nadolsky},
journal= {arXiv preprint arXiv:2112.14329},
year = {2021}
}
Comments
To be submitted to the proceedings of the 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman (HADRON2021), 26-31 July (2021), Mexico City (Mexico). Contains style files for submission to Suplementos de la Revista Mexicana de F\'isica