Effects of Pairing Correlations on the Isospin-Symmetry Correction to Super-Allowed 0+ → 0+ Fermi Transitions Within the Higher Tamm-Dancoff Approach
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en
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Ce document a été publié dans
International Journal of Modern Physics E. 2011-02, vol. 20, p. 274-280
World Scientific Publishing
Résumé en anglais
Super-allowed 0+ → 0+ Fermi transitions provide a test at low energy of the Standard Model of elementary interactions. The isospin-symmetry breaking due to the electromagnetic interaction at a nuclear level is a fundamental ...Lire la suite >
Super-allowed 0+ → 0+ Fermi transitions provide a test at low energy of the Standard Model of elementary interactions. The isospin-symmetry breaking due to the electromagnetic interaction at a nuclear level is a fundamental theoretical tool for the understanding of weak processes beyond the Standard Model. Within the Higher Tamm-Dancoff description of correlated nuclear states, we calculate the isospin-symmetry breaking correction δc to the Fermi transition matrix element. A sensitivity study on the T = 0 pairing correlations is carried out and some tests of model ingredients are performed. The obtained correction is of the order of 0.15~0.2% for plausible strengths in the T = 1 and T = 0 channels of the residual interaction. This is expected to constitute a lower bound.< Réduire
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