Standard-Model Tests with Superallowed {beta} Decay: Nuclear Data Applied to Fundamental Physics
- Cyclotron Institute, Texas A and M University, College Station, TX 77843 (United States)
The study of superallowed nuclear {beta} decay currently provides the most precise and convincing confirmation of the conservation of the vector current (CVC) and is a key component of the most demanding available test of the unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, a basic pillar of the Electroweak Standard Model. Experimentally, the Q-value, half-life, and branching ratio for superallowed transitions must be determined with a precision better than 0.1%. This demands metrological techniques be applied to short-lived ({approx}1 s) activities and that strict standards be employed in surveying the body of world data. The status of these fundamental studies is summarized and recent work described.
- OSTI ID:
- 20722652
- Journal Information:
- AIP Conference Proceedings, Vol. 769, Issue 1; Conference: International conference on nuclear data for science and technology, Santa Fe, NM (United States), 26 Sep - 1 Oct 2004; Other Information: DOI: 10.1063/1.1945100; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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