eprintid: 10205270
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/20/52/70
datestamp: 2025-02-27 16:09:11
lastmod: 2025-02-27 16:09:11
status_changed: 2025-02-27 16:09:11
type: proceedings_section
metadata_visibility: show
sword_depositor: 699
creators_name: Thorne, RS
creators_name: Cridge, T
creators_name: Harland-Lang, L
title: MSHT Updates 2024
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
note: © Copyright owned by the author(s) under the terms of the Creative Commons
Attribution-NonCommercial-NoDerivatives 4.0 International License (https://creativecommons.org/licenses/by-nc-nd/4.0/deed.en).
abstract: We present various recent updates related to the MSHT20 PDF sets, and particularly to the MSHT20 approximate N3LO (aN3LO) PDFs. These include an investigation of including either inclusive jet data or dijet data, the detailed treatment of Z pT data, and the impact on the gluon PDF in particular. We also very briefly summarize the determination of the strong coupling via an aN3LO global PDF fit, finding αS(MZ2 ) = 0.1170 ± 0.016, and of including QED corrections in the aN3LO analysis. Finally we consider the preliminary finding associated with the effect of improved knowledge of the N3LO splitting functions on the aN3LO PDFs. In particular we note a moderate impact on the gluon distribution, i.e. within the uncertainty, and a more limited impact on the gluon-gluon luminosity unless strong rapidity cuts are imposed. Hence, we conclude that while details of our aN3LO PDFs will change with more precise splitting functions, only relatively minor effects on predictions are likely to result.
date: 2025
date_type: published
publisher: PoS
official_url: https://pos.sissa.it/
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2360267
lyricists_name: Thorne, Robert
lyricists_id: RTHOR15
actors_name: Thorne, Robert
actors_id: RTHOR15
actors_role: owner
full_text_status: public
pres_type: paper
publication: Proceedings of Science
volume: 469
pagerange: 1-5
event_title: DIS2024
book_title: Proceedings of Science
citation:        Thorne, RS;    Cridge, T;    Harland-Lang, L;      (2025)    MSHT Updates 2024.                     In:  Proceedings of Science.  (pp. pp. 1-5).  PoS       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10205270/1/DIS2024proc.pdf