dorsal/arxiv
View SchemaUp-Down Quark Mass Difference Effect in Nuclear Many-Body Systems
| Authors | S. Nakamura, K. Muto, M. Oka, S. Takeuchi, T. Oda |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9502013 |
| URL | https://arxiv.org/abs/nucl-th/9502013 |
| DOI | 10.1103/PhysRevLett.76.881 |
| Journal | Phys.Rev.Lett. 76 (1996) 881-884 |
Abstract
A charge-symmetry-breaking nucleon-nucleon force due to the up-down quark mass difference is evaluated in the quark cluster model. It is applied to the shell-model calculation for the isovector mass shifts of isospin multiplets and the isospin-mixing matrix elements in 1s0d-shell nuclei. We find that the contribution of the quark mass difference effect is large and agrees with experiment. This contribution may explain the Okamoto-Nolen-Schiffer anomaly, alternatively to the meson-mixing contribution, which is recently predicted to be reduced by the large off-shell correction.
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"abstract": "A charge-symmetry-breaking nucleon-nucleon force due to the up-down quark\nmass difference is evaluated in the quark cluster model. It is applied to the\nshell-model calculation for the isovector mass shifts of isospin multiplets and\nthe isospin-mixing matrix elements in 1s0d-shell nuclei. We find that the\ncontribution of the quark mass difference effect is large and agrees with\nexperiment. This contribution may explain the Okamoto-Nolen-Schiffer anomaly,\nalternatively to the meson-mixing contribution, which is recently predicted to\nbe reduced by the large off-shell correction.",
"arxiv_id": "nucl-th/9502013",
"authors": [
"S. Nakamura",
"K. Muto",
"M. Oka",
"S. Takeuchi",
"T. Oda"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevLett.76.881",
"journal_ref": "Phys.Rev.Lett. 76 (1996) 881-884",
"title": "Up-Down Quark Mass Difference Effect in Nuclear Many-Body Systems",
"url": "https://arxiv.org/abs/nucl-th/9502013"
},
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