Color Glass Condensate at next-to-leading order meets HERA data
Abstract
We perform the first dipole picture fit to HERA inclusive cross section data using the full next-to-leading order (NLO) impact factor combined with an improved Balitsky-Kovchegov evolution including the dominant effects beyond leading logarithmic accuracy at low . We find that three different formulations of the evolution equation that have been proposed in the recent literature result in a very similar description of HERA data, and robust predictions for future deep inelastic scattering experiments. We find evidence pointing towards a significant nonperturbative contribution to the structure function for light quarks, which stresses the need to extend the NLO impact factor calculation to massive quarks.
Keywords
Cite
@article{arxiv.2007.01645,
title = {Color Glass Condensate at next-to-leading order meets HERA data},
author = {G. Beuf and H. Hänninen and T. Lappi and H. Mäntysaari},
journal= {arXiv preprint arXiv:2007.01645},
year = {2020}
}
Comments
20 pages, 9 figures. v2: matches published version. Fit results available at https://doi.org/10.5281/zenodo.4229269