Progress in top-quark pair production cross section calculations and impact on parton distribution functions of the proton

2024/10/30 by Alim Ablat, Sayipjamal Dulat, Ablat, Alim +15 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Superconducting Materials and Applications

paper · pdf · doi:10.48550/arxiv.2411.00055

openalex publication_date 2024/10/30 · openalex created_date 2024/11/14 · openalex updated_date 2026/07/28

Abstract

We discuss the impact of eligible top-quark pair production differential cross-section measurements at the LHC with a collision energy of 13 TeV on the parton distribution functions (PDFs) of the proton as well as the impact of approximate next-to-next-to-next-to-leading order (aN³LO) QCD corrections combined with next-to-leading order (NLO) electroweak (EW) corrections on t t observables. We illustrate the effects on the gluon PDF at large x from an optimal baseline selection of data in NNLO global fits, and show comparisons between the theory prediction for t t total and differential cross sections at aN³LO QCD combined with NLO EW and recent measurements from the ATLAS and CMS collaborations at the LHC.

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