Abstract
Presently, the world data for superallowed decay leads to a result in disagreement (at the confidence level) with the predictions of the minimal standard model for the unitarity of the Cabibbo-Kobayashi-Maskawa matrix. Precise data for the superallowed decay of would provide a critical test of the nucleus-dependent isospin symmetry-breaking corrections that must be calculated for these superallowed Fermi decays. The present work reports the first precise measurement of the half-life for ( ). The data were obtained at the radioactive beam facility (ISAC) at TRIUMF using a beam of ions .
- Received 16 August 2000
DOI:https://doi.org/10.1103/PhysRevLett.86.1454
©2001 American Physical Society