A1 Journal article (refereed)
Predictions for exclusive Υ photoproduction in ultraperipheral Pb+Pb collisions at the LHC at next-to-leading order in perturbative QCD (2023)
Eskola, K. J., Flett, C. A., Guzey, V., Löytäinen, T., & Paukkunen, H. (2023). Predictions for exclusive Υ photoproduction in ultraperipheral Pb+Pb collisions at the LHC at next-to-leading order in perturbative QCD. European Physical Journal C, 83(8), Article 758. https://doi.org/10.1140/epjc/s10052-023-11927-8
JYU authors or editors
Publication details
All authors or editors: Eskola, Kari J.; Flett, Christopher A.; Guzey, Vadim; Löytäinen, Topi; Paukkunen, Hannu
Journal or series: European Physical Journal C
ISSN: 1434-6044
eISSN: 1434-6052
Publication year: 2023
Publication date: 29/08/2023
Volume: 83
Issue number: 8
Article number: 758
Publisher: Springer
Publication country: Germany
Publication language: English
DOI: https://doi.org/10.1140/epjc/s10052-023-11927-8
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/88891
Web address of parallel published publication (pre-print): https://arxiv.org/abs/2303.03007
Abstract
We present predictions for the rapidity-differential cross sections of exclusive Υ photoproduction in ultraperipheral collisions (UPCs) of lead ions at the Large Hadron Collider (LHC). We work in the framework of collinear factorization at next-to-leading order (NLO) in perturbative QCD, modeling the generalized parton distributions (GPDs) through the Shuvaev transform of nuclear parton distribution functions (nPDFs). Our direct NLO predictions depend significantly on nPDF uncertainties and on the choices of the factorization and renormalization scales, but to a much lesser degree on GPD modeling. To tame the scale dependence and to account for the fact that the NLO calculations generally underpredict the photoproduction measurements on protons, we also present alternative, data-driven predictions. In this approach the underlying photoproduction cross sections on lead are found by combining their nuclear modifications calculated at NLO with the measured photoproduction cross sections on protons. The data-driven strategy reduces the uncertainties associated with the scale choices, and essentially eliminates the effects of GPD modeling thereby leaving the cross sections sensitive mainly to the input nPDFs. Our estimates indicate that the process is measurable in Pb+Pb collisions at the LHC.
Keywords: particle physics; quantum chromodynamics
Contributing organizations
Related projects
- Applications of perturbative Quantum Chromo Dynamics in high-energy nuclear collisions
- Paukkunen, Hannu
- Research Council of Finland
- Nuclear parton distributions and QCD matter properties from LHC data
- Eskola, Kari
- Research Council of Finland
- Center of Excellence in Quark Matter
- Eskola, Kari
- Research Council of Finland
- Center of Excellence in Quark Matter
- Paukkunen, Hannu
- Research Council of Finland
Ministry reporting: Yes
VIRTA submission year: 2023
JUFO rating: 2