2003/07/23 by Nicola Cabibbo, Earl C. Swallow, Roland Winston · 9 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1146/annurev.nucl.53.013103.155258
published as Ann.Rev.Nucl.Part.Sci.53:39-75,2003 · 37 pages, 8 figures, 4 tables, Final version of this material is scheduled to appear in the Annual Review of Nuclear and Particle Science Vol. 53
arxiv created 2003/07/23 · openalex publication_date 2003/12/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
▪ Abstract We review the status of hyperon semileptonic decays. The central issue is the V us element of the CKM matrix, for which we obtain V us = 0.2250 ( 27 ). This value is similar in precision to the one derived from K l3 , but higher, and in better agreement with the unitarity requirement, |V ud | 2 + | us | 2 + |V ub | 2 = 1. We find that the Cabibbo model gives an excellent fit to baryon–beta-decay form-factor data (χ 2 = 2.96 for 3 degrees of freedom) with F + D = 1.2670 ± 0.0030, F − D = −0.341 ± 0.016, and no indication of flavor-SU(3)–breaking effects. We indicate the need for more experimental and theoretical work, both on hyperon beta decays and on K l3 decays.