The measurement and interpretation of superallowed $0^+ \to 0^+$ nuclear $\beta$ decay - INSPIRE

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The measurement and interpretation of superallowed $0^+ \to 0^+$ nuclear $\beta$ decay

Dec 12, 2013

29 pages

Published in:

J.Phys.G 41 (2014) 11, 114004

Published: Oct 14, 2014

e-Print:

1312.3587 [nucl-ex]

DOI:

10.1088/0954-3899/41/11/114004

View in:

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Abstract: (IOP)

Measurements of the decay strength of superallowed 0(+)→ 0(+) nuclear β transitions shed light on the fundamental properties of weak interactions. Because of their impact, such measurements were first reported 60 years ago in the early 1950s and have continued unabated ever since, always taking advantage of improvements in experimental techniques to achieve ever higher precision. The results helped first to shape the Electroweak Standard Model but more recently have evolved into sensitively testing that model's predictions. Today they provide the most demanding test of vector-current conservation and of the unitarity of the Cabibbo–Kobayashi–Maskawa matrix, as well as the most restrictive limit on the presence of a scalar current. Here, we review the experimental and theoretical methods that have been, and are being, used to characterize superallowed 0(+)→ 0(+) β transitions and to extract fundamentally important parameters from their analysis.

Note:

32 pages, 9 figures

superallowed beta decay
half-lives
Q values
branching ratios
CKM unitarity
electroweak interaction: standard model
nucleus: semileptonic decay
CKM matrix: unitarity
weak interaction
review

References(98)

Figures(9)

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