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The Nolen-Schiffer anomaly and isospin symmetry breaking in nuclear matter

K. Saito·A. W. Thomas
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Abstract

The quark-meson coupling model which we have developed previously is extended to incorporate the $δ$ meson. It is then used to study the Nolen-Schiffer anomaly and isospin symmetry breaking in nuclear matter. We find that, in combination with the {\it u-d\/} mass difference, the difference between quark scalar densities in protons and neutrons generates an effective neutron-proton mass difference of the right magnitude. Finally we find that isospin symmetry breaking in the quark condensates can be directly related to the $δ$ meson field.

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K. Saito, A. W. Thomas. 1994-05-10. The Nolen-Schiffer anomaly and isospin symmetry breaking in nuclear matter. https://doi.org/10.1016/0370-2693(94)91551-2

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