Journal Article

PUBDB-2025-02217

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png NNLO PDFs driven by top-quark data

Alekhin, S. ; Garzelli, M. V. (Corresponding author)Extern* ; Moch, S.-O.Extern* ; Zenaiev, O.Extern*

2025
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1140/epjc/s10052-025-13832-8  doi:10.3204/PUBDB-2025-02217

Report No.: DESY-24-092; arXiv:2407.00545

Abstract: We study the impact of state-of-the-art top-quark data collected at the large hadron collider on parton distribution functions (PDFs). Following the ABMP methodology, the fit extracts simultaneously proton PDFs, the strong coupling $\alpha _s(M_Z)$ and heavy-quark masses at next-to-next-to-leading order (NNLO) accuracy in QCD. It includes recent high-statistics data on absolute total inclusive cross sections for $t\bar{t}+X$, the sum of $(t + X)$ and $(\bar{t} + X)$ hadroproduction, and normalized inclusive data double-differential in the invariant mass and rapidity of the $t\bar{t}$ pair at $\sqrt{S}=13$ TeV. The gluon PDF at large x and the top-quark mass value derived from these data are well compatible with the previous ABMP16 results, but with significantly smaller uncertainties, reduced by up to a factor of two. At NNLO in QCD we obtain for the strong coupling the value $\alpha _s^{(n_f=5)}(M_Z)= 0.1150 \pm 0.0009$ and for the top-quark mass in the ${\overline{\text{ MS }}}$-scheme $m_t(m_t) = 160.6 \pm 0.6$ GeV, corresponding to $m_t^\textrm{pole} = 170.2 \pm 0.7$ GeV in the on-shell scheme. The new fit, dubbed ABMPtt, is publicly released in grids in LHAPDF format.

Note: Eur. Phys. J. C 85 (2025) 162, 1 - 25. 33 pages, 22 figures, 4 tables, interpolation tables for top-antitop production available at https://ploughshare.web.cern.ch v2: minor revision accounting for the comments of the Referee, to be published in EPJC

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Contributing Institute(s):

1. Uni Hamburg / Theorie (UNI/TH)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)409651613 - FOR 2926: Next Generation Perturbative QCD for Hadron Structure: Preparing for the Electron-Ion Collider (409651613) (409651613)
3. 05H21GUCCA - Verbundprojekt 05H2021 (ErUM-FSP T03) - Run 3 von CMS am LHC: Präzisionsbestimmung von Partondichtefunktionen und Top-Quark-Masse (BMBF-05H21GUCCA) (BMBF-05H21GUCCA)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Alekhin, S.Extern* ; Garzelli, M. V. (Corresponding author)Extern* ; Moch, S.-O.Extern* ; Zenaiev, O.Extern*
NNLO PDFs driven by top-quark data
[10.3204/PUBDB-2024-04864]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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