Superallowed Fermi beta decay | Zendy

J. C. Hardy | Zendy; I. S. Towner | Zendy

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Superallowed Fermi beta decay

Author(s) -

J. C. Hardy,

I. S. Towner

Publication year - 1998

Publication title -

nuclear theory

Language(s) - English

Resource type - Conference proceedings

DOI - 10.1063/1.57367

Subject(s) - unitarity , physics , beta decay , fermi gamma ray space telescope , beta (programming language) , nuclear physics , particle physics , coupling (piping) , coupling constant , range (aeronautics) , measure (data warehouse) , reliability (semiconductor) , matrix (chemical analysis) , quality (philosophy) , quantum mechanics , chemistry , computer science , data mining , mechanical engineering , power (physics) , materials science , chromatography , engineering , composite material , programming language

Superallowed $0^+ \to 0^+$ nuclear beta decay provides a direct measure ofthe weak vector coupling constant, $\GV$. We survey current world data on thenine accurately determined transitions of this type, which range from the decayof $^{10}$C to that of $^{54}$Co, and demonstrate that the results confirmconservation of the weak vector current (CVC) but differ at the 98% confidencelevel from the unitarity condition for the Cabibbo-Kobayashi-Maskawa (CKM)matrix. We examine the reliability of the small calculated corrections thathave been applied to the data, and assess the likelihood of even higher qualitynuclear data becoming available to confirm or deny the discrepancy. Some of therequired experiments depend upon the availability of intense radioactive beams.Others are possible today.Comment: 6 pages, LaTeX with aipproc.sty and epsf.sty; Talk at Int. Conf. on Exotic Nuclei and Atomic Masses (ENAM98), Michigan, June 199

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