Measurement of Vud with 0+→0+ nuclear beta decays | Conference Paper individual record
abstract

Results from superallowed 0+→0+ nuclear beta decays today provide the best value for Vud, with an uncertainty of ±0.02%. Some 150 independent measurements of 13 separate superallowed transitions covering a wide range of parent nuclei from 10C to 74Rb constitute a very robust data set. Excellent consistency among the average results for all 13 transitions - an expected consequence of the conservation of vector current (CVC) - also confirms the validity of the small transition-dependent theoretical corrections that have been applied to account for isospin-symmetry breaking. With CVC consistency established, the value of the vector coupling constant, GV, has been extracted from the data and used to determine -Vud- = 0.97425 (22). © 2013 AIP Publishing LLC.

authors
author list (cited authors)
Hardy, J. C., & Towner, I. S.
publication date
2013
publisher
Aip Publisher
published in
keywords
  • V-udBeta-decay