Superallowed decays within and beyond the standard model - Archive ouverte HAL
Article Dans Une Revue The European physical journal. A, Hadrons and Nuclei Année : 2023

Superallowed decays within and beyond the standard model

Résumé

This note reviews the role of superallowed transitions in determining the strength of the weak interaction among the lightest quarks and in searching for new physics beyond the standard electroweak model. The two sets of superallowed decays in nuclei considered here are pure Fermi and mirror transitions. The first have been scrutinized for more than 50 years. The most relevant results are presented and the role of the nucleus-dependent radiative correction and nucleus-independent inner radiative correction are reviewed. In this context, the systematic study of mirror transitions started about 15 years ago. Despite the significant progress made since then, the data is still limited by experimental uncertainties. Combining the results from all superallowed transitions, which are fully consistent, provides a test of unitarity of the first row of the Cabibbo-Kobayashi-Maskawa matrix, which displays a 2$\sigma $ tension with the standard model.

Dates et versions

hal-04114586 , version 1 (02-06-2023)

Identifiants

Citer

Adam Falkowski, Martín González-Alonso, Oscar Naviliat-Cuncic, Nathal Severijns. Superallowed decays within and beyond the standard model. The European physical journal. A, Hadrons and Nuclei, 2023, 59 (5), pp.113. ⟨10.1140/epja/s10050-023-01030-7⟩. ⟨hal-04114586⟩
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