Harland-Lang, LA;
Martin, AD;
Nathvani, R;
Thorne, RS;
(2019)
Ad Lucem: QED parton distribution functions in the MMHT framework.
The European Physical Journal C
, 79
(10)
, Article 811. 10.1140/epjc/s10052-019-7296-0.
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Abstract
We present the MMHT2015qed PDF set, resulting from the inclusion of QED corrections to the existing set of MMHT Parton Distribution Functions (PDFs), and which contain the photon PDF of the proton. Adopting an input distribution from the LUXqed formulation, we discuss our methods of including QED effects for the full, coupled DGLAP evolution of all partons with QED at O(α) , O(ααS) , O(α2) . While we find consistency for the photon PDF of the proton with other recent sets, building on this we also present a set of QED corrected neutron PDFs and provide the photon PDF separated into its elastic and inelastic contributions. The effect of QED corrections on the other partons and the fit quality is investigated, and the sources of uncertainty for the photon are outlined. Finally we explore the phenomenological implications of this set, giving the partonic luminosities for both the elastic and inelastic contributions to the photon and the effect of our photon PDF on fits to high mass Drell–Yan production, including the photon-initiated channel.
| Type: | Article |
|---|---|
| Title: | Ad Lucem: QED parton distribution functions in the MMHT framework |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-019-7296-0 |
| Publisher version: | https://doi.org/10.1140/epjc/s10052-019-7296-0 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Physical Sciences, Physics, Particles & Fields, Physics, DEUTERON STRUCTURE FUNCTIONS, DEEP-INELASTIC-SCATTERING, HIGH STATISTICS MEASUREMENT, PROTON STRUCTURE-FUNCTION, PRODUCTION CROSS-SECTION, MUON SCATTERING, PP COLLISIONS, ROOT-S=7 TEV, GLOBAL ANALYSIS, FINAL-STATES |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10084433 |
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