Isospin-symmetry-breaking corrections to superallowed Fermi beta decay: Formalism and schematic models

Details Isospin-symmetry-breaking corrections to superallowed Fermi beta decay: Formalism and schematic models Isospin-symmetry-breaking corrections to superallowed Fermi beta decay: Formalism and schematic models

2008-05-05

arxiv.org/abs/0805.0603v2

Phys.Rev.C78:035501,2008

Physics

Nuclear Physics

Nuclear Theory

8 pages; NT@UW-08-08; added reference, published version

Scientific paper

10.1103/PhysRevC.78.035501

We study the formalism to include isospin-symmetry-breaking corrections when extracting the up-down Cabibbo-Kobayashi-Maskawa matrix element from superallowed 0+ -> 0+ nuclear beta decay. We show that there are no first order isospin-symmetry-breaking corrections to the relevant nuclear matrix elements. We find corrections to the treatment of Towner and Hardy, and assess these using schematic models of increasing complexity.

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