Isospin corrections to super-allowed beta decays in nuclei

N. Auerbach

doi:10.1088/1742-6596/533/1/012001

Isospin corrections to super-allowed beta decays in nuclei

N. Auerbach^*

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

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 δ_cas a function of the mass number A are derived. These corrections affect the values of the V_udmatrix 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
Article number	012001
Journal	Journal of Physics: Conference Series
Volume	533
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/533/1/012001
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

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10.1088/1742-6596/533/1/012001

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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.",

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AB - 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.

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Y2 - 16 September 2013 through 22 September 2013

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Isospin corrections to super-allowed beta decays in nuclei

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