High-precision determination of radiative corrections to superallowed nuclear beta decays

2025/08/21 by Chien-Yeah Seng, Seng, Chien-Yeah
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2508.15203

openalex publication_date 2025/08/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Superallowed 0⁺→ 0⁺ transitions between T=1 nuclei have been a perfect avenue avenue for determining the Cabibbo-Kobayashi-Maskawa matrix element V_ud, which imposes powerful constraints on physics beyond the Standard Model at low energies. For a long time, the precision of V_ud has been limited by uncertainties in radiative corrections that arise from non-perturbative strong interaction physics at both the hadronic and nuclear levels. In this talk, I will describe some recent efforts to pin down these corrections by combining dispersive analysis with experimental data, lattice QCD, and nuclear many-body calculations.

Citations

• An ab initio strategy for taming nuclear-structure dependence of V_ud extractions: the ¹⁰C → ¹⁰B superallowed transition
• Lattice QCD Calculation of Electroweak Box Contributions to Superallowed Nuclear and Neutron Beta Decays
• CP-Violation in the Renormalizable Theory of Weak Interaction

Related

• Nuclear beta decays and CKM unitarity
• V_ud radiative corrections with lattice input
• An ab initio strategy for taming nuclear-structure dependence of V_ud extractions: the ¹⁰C → ¹⁰B superallowed transition
• The Zα² correction to superallowed beta decays in effective field theory and implications for |V_ud|
• The current evaluation of Vud