Photons in the proton : implications for the LHC
Abstract
We construct a set of parton distribution functions (PDFs), based on the recent NNPDF4.0 PDF set, that also include a photon PDF. The photon PDF is constructed using the LuxQED formalism, while QED evolution accounting for O(alpha), O(alpha alphas) and O(alpha^2) corrections is implemented and benchmarked by means of the EKO code. We investigate the impact of QED effects on NNPDF4.0, and compare our results both to our previous NNPDF3.1QED PDF set and to other recent PDF sets that include the photon. We assess the impact of photon-initiated processes and electroweak corrections on a variety of representative LHC processes, and find that they can reach the 5% level in vector boson pair production at large invariant mass.
Main Authors
Format
Articles
Research article
Published
2024
Series
Subjects
Publication in research information system
Publisher
Springer
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202406064369Use this for linking
Review status
Peer reviewed
ISSN
1434-6044
DOI
https://doi.org/10.1140/epjc/s10052-024-12731-8
Language
English
Published in
European Physical Journal C
Citation
- Ball, R. D., Barontini, A., Candido, A., Carrazza, S., Cruz-Martinez, J., Del Debbio, L., Forte, S., Giani, T., Hekhorn, F., Kassabov, Z., Laurenti, N., Magni, G., Nocera, E. R., Rabemananjara, T. R., Rojo, J., Schwan, C., Stegeman, R., & Ubiali, M. (2024). Photons in the proton : implications for the LHC. European Physical Journal C, 84(4), Article 540. https://doi.org/10.1140/epjc/s10052-024-12731-8
License
Funder(s)
Research Council of Finland
Research Council of Finland
Funding program(s)
Academy Research Fellow, AoF
Centre of Excellence, AoF
Akatemiatutkija, SA
Huippuyksikkörahoitus, SA
Additional information about funding
R. D. B, L. D. D., and R. S. are supported by the U.K. Science and Technology Facility Council (STFC) grant ST/T000600/1. F. H. is supported by the Academy of Finland project 358090 and is funded as a part of the Center of Excellence in Quark Matter of the Academy of Finland, project 346326. E. R. N. is supported by the Italian Ministry of University and Research (MUR) through the “Rita Levi-Montalcini” Program. M. U. and Z. K. are supported by the European Research Council under the European Union’s Horizon 2020 research and innovation Programme (grant agreement n.950246), and partially by the STFC consolidated grant ST/L000385/1. J. R. is partially supported by NWO, the Dutch Research Council. C. S. is supported by the German Research Foundation (DFG) under reference number DE 623/6-2.
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