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

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

1994-05-10

arxiv.org/abs/nucl-th/9405009v1

Phys.Lett.B335:17-23,1994

Physics

Nuclear Physics

Nuclear Theory

13 pages

Scientific paper

10.1016/0370-2693(94)91551-2

The quark-meson coupling model which we have developed previously is extended to incorporate the $\delta$ 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 $\delta$ meson field.

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