https://doi.org/10.1140/epjc/s10052-025-13832-8
Regular Article - Theoretical Physics
NNLO PDFs driven by top-quark data
II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
a
maria.vittoria.garzelli@desy.de
Received:
27
July
2024
Accepted:
20
January
2025
Published online:
7
February
2025
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 
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 
, the sum of 
and 
hadroproduction, and normalized inclusive data double-differential in the invariant mass and rapidity of the 
pair at 
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 
and for the top-quark mass in the 
-scheme 
GeV, corresponding to 
GeV in the on-shell scheme. The new fit, dubbed ABMPtt, is publicly released in grids in LHAPDF format.
© The Author(s) 2025
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Funded by SCOAP3.
