Updated running quark and lepton parameters at various scales

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Authors: Stefan Antusch, Kevin Hinze, Shaikh Saad
Cited by: 5
References: 45

Abstract

In light of the recent Particle Data Group (PDG) release, we revisit the running quark and lepton Yukawa couplings, together with the quark mixing parameters, across a range of energy scales. The 2024 PDG determinations of low-energy fermion masses feature significantly smaller uncertainties, resulting from a reduced estimate of systematic errors compared to the more conservative treatment in the 2022 analysis. To assess the impact of these changes, we present running parameters obtained using both the 2022 and 2024 datasets, within the frameworks of the Standard Model (SM) and its minimal supersymmetric extension (MSSM). The evolved values, along with their associated 1 σ uncertainties, are given within the SM framework at benchmark scales of M Z and 10 3 , 3 × 10 3 , 10 4 , 10 5 , 10 7 , 10 9 , 10 12 , and 10 16 GeV . Within the MSSM, we additionally provide Grand-Unified-Theory-scale results for different choices of tan β , assuming supersymmetry breaking scales of 3 and 10 TeV, including an approximate way for taking supersymmetric loop threshold corrections into account. We furthermore discuss implications of the updated results for constructing and testing theories beyond the SM.

Fields of Study & Subjects

Particle physics theoretical and experimental studies Neutrino Physics Research International Science and Diplomacy

Publication details

Journal / source
Physical review. D/Physical review. D.
Publisher
American Physical Society (APS)
Volume
113
Issue
9
Publication date
23 March 2026
Language
EN