Standard‐Model Tests with Superallowed β Decay: Nuclear Data Applied to Fundamental Physics Conference Paper uri icon


  • The study of superallowed nuclear β 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 (∼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. © 2005 American Institute of Physics.

author list (cited authors)

  • Hardy, J. C.

publication date

  • January 1, 2005 11:11 AM


  • AIP  Publisher