A4 Article in conference proceedings
Dipole model at Next-to-Leading Order meets HERA data (2021)


Beuf, G., Hänninen, H., Lappi, T., & Mäntysaari, H. (2021). Dipole model at Next-to-Leading Order meets HERA data. In HardProbes2020 : 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Article 101). Sissa Medialab. POS Proceedings of Science, 387. https://doi.org/10.22323/1.387.0101


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Publication details

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

Parent publication: HardProbes2020 : 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

Conference:

  • International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

Place and date of conference: Austin, Texas, 1.-6.6.2020

Journal or series: POS Proceedings of Science

eISSN: 1824-8039

Publication year: 2021

Number in series: 387

Article number: 101

Publisher: Sissa Medialab

Publication country: Italy

Publication language: English

DOI: https://doi.org/10.22323/1.387.0101

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/78507


Abstract

Deep inelastic scattering (DIS) total cross section data at small-x as measured by the HERA experiments is well described by Balitsky-Kovchegov (BK) evolution in the leading order dipole picture. Recently the full Next-to-Leading Order (NLO) dipole picture total cross sections have become available for DIS, and a working factorization scheme has been devised which subtracts the soft gluon divergence present at NLO.
We report our recently published work in which we make the first comparisons of the NLO DIS total cross sections to HERA data. The non-perturbative initial condition to BK evolution is fixed by fitting the HERA reduced cross section data. As the NLO results for the DIS total cross section are currently available only in the massless quark limit, we also fit a light-quark-only cross section constructed with a parametrization of published total and heavy quark data. We find an excellent description of the HERA data. Since the full NLO BK equation is computationally expensive, we use a number of beyond LO prescriptions for the evolution that include most important higher order corrections enhanced by large transverse logarithms, including the recent version of the equation formulated in terms of the target momentum fraction.


Keywords: particle physics; scattering (physics)


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Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 0


Last updated on 2022-20-09 at 14:47