Year: 2026
Type: preprint
Abstract: We investigate the impact of resummation-scale variations on parton distribution function (PDF) determinations. These variations introduce an additional source of theoretical uncertainty related to the evolution of PDFs and strong coupling $α_s$ that has never previously been accounted for in PDF fits. Using the open-source xFitter framework, we quantify this uncertainty in fits to HERA deep-inelastic scattering data and examine its implications for predictions of top-quark pair production at the LHC. We show that the resulting resummation-scale uncertainties have a sizable impact on LHC observables, highlighting the importance of including this source of uncertainty in precision QCD analyses.
Source: arXiv (Cornell University)
Institutions: Malayer University, Institute for Research in Fundamental Sciences, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, University of Cagliari, Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata, Link Campus University, Deutsches Elektronen-Synchrotron DESY, Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, University of Oxford, University of Zurich, University of Sharjah, Universität Hamburg
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7214804848