Abstract
Isospin corrections to the super-allowed beta decay matrix elements are evaluated in perturbation theory using the notion of the giant isovector monopole state. The calculation avoids the separation into different contributions and therefore presents a consistent, systematic and more transparent approach. Explicit expressions for δcas a function of the mass number A are derived. These corrections affect the values of the Vudmatrix element in the Cabbibo-Maskawa-Kobayashi matrix. Also, it is pointed out that in some nuclei with a low number of excess neutrons (protons) Coulomb mixing with the anti-analog state can introduce significant isospin impurities in the isobaric analog state.
Original language | English |
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Article number | 012001 |
Journal | Journal of Physics: Conference Series |
Volume | 533 |
Issue number | 1 |
DOIs | |
State | Published - 2014 |
Event | 20th International School on Nuclear Physics, Neutron Physics and Applications, Varna 2013 - Varna, Bulgaria Duration: 16 Sep 2013 → 22 Sep 2013 |