A1 Journal article (refereed)
Color glass condensate at next-to-leading order meets HERA data (2020)

Beuf, G., Hänninen, H., Lappi, T., & Mäntysaari, H. (2020). Color glass condensate at next-to-leading order meets HERA data. Physical Review D, 102(7), Article 074028. https://doi.org/10.1103/PhysRevD.102.074028

JYU authors or editors

Publication details

All authors or editors: Beuf, Guillaume; Hänninen, Henri; Lappi, Tuomas; Mäntysaari, Heikki

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2020

Publication date: 30/10/2020

Volume: 102

Issue number: 7

Article number: 074028

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.102.074028

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/72464

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2007.01645

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 x. 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 toward 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: particle physics; nuclear physics

Free keywords: perturbative QCD; QCD in nuclear reactions

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Ministry reporting: Yes

VIRTA submission year: 2020

JUFO rating: 2