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Isospin symmetry-breaking corrections for superallowed β decay in relativistic RPA approaches

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, , Citation Haozhao Liang et al 2010 J. Phys.: Conf. Ser. 205 012028 DOI 10.1088/1742-6596/205/1/012028

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1 State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China

2 Institut de Physique Nucléaire, IN2P3-CNRS and Université Paris-Sud, 91406 Orsay, France

3 School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

4 Department of Physics, University of Stellenbosch, Stellenbosch, South Africa

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1742-6596/205/1/012028

Abstract

The isospin symmetry-breaking corrections δc obtained with the self-consistent relativistic RPA approaches are presented. It is shown that the proper treatment of the Coulomb mean field is very important for extracting these corrections. The nucleus-independent Ft value, the Vud matrix element and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix are discussed. The effects of neutron-proton mass difference on the isospin symmetry-breaking corrections are also investigated.

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10.1088/1742-6596/205/1/012028