Effect of nucleon structure variation in super-allowed Fermi beta-decay
Date
1995
Authors
Saito, K.
Thomas, A.
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Journal article
Citation
Physics Letters B: Nuclear Physics and Particle Physics, 1995; B363(3):157-161
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Abstract
There is a well known anomaly between the value of the Fermi decay constant extracted from super-allowed Fermi beta-decay of nuclear isotriplets and that required by unitarity of the Cabibbo-Kobayashi-Maskawa matrix. This discrepancy remains at the level of a few tenths of a percent after the most rigorous investigation of conventional nuclear and radiative corrections. Within the framework of the quark-meson coupling model of nuclear matter, which has been previously applied successfully to phenomena such as nuclear saturation and nuclear charge symmetry violation, we show that it is possible to understand a significant fraction of the observed anomaly. © 1995.