TY  - JOUR
AU  - Alekhin, S.
AU  - Garzelli, M. V.
AU  - Moch, S.-O.
AU  - Zenaiev, O.
TI  - NNLO PDFs driven by top-quark data
JO  - The European physical journal / C
VL  - 85
IS  - 2
SN  - 1434-6044
CY  - Heidelberg
PB  - Springer
M1  - PUBDB-2025-02217
M1  - arXiv:2407.00545
M1  - DESY-24-092
SP  - 162
PY  - 2025
N1  - 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
AB  - 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 α<sub>s</sub>(M<sub>Z</sub>) 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―t+X, the sum of (t + X) and (―t + X) hadroproduction, and normalized inclusive data double-differential in the invariant mass and rapidity of the t―t pair at √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 α<sub>s</sub><sup>(n<sub>f</sub>=5)</sup>(M<sub>Z</sub>) = 0.1150 ±0.0009 and for the top-quark mass in the ―\text MS -scheme m<sub>t</sub>(m<sub>t</sub>) = 160.6 ±0.6 GeV, corresponding to m<sub>t</sub><sup>pole</sup> = 170.2 ±0.7 GeV in the on-shell scheme. The new fit, dubbed ABMPtt, is publicly released in grids in LHAPDF format.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1140/epjc/s10052-025-13832-8
UR  - https://bib-pubdb1.desy.de/record/632668
ER  -