dorsal/arxiv
View SchemaThe baryon-decuplet in the chiral dynamics of Lambda-hyperons in nuclear matter
| Authors | J. Martin Camalich, M. J. Vicente Vacas |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0611082 |
| URL | https://arxiv.org/abs/nucl-th/0611082 |
| DOI | 10.1103/PhysRevC.75.035207 |
| Journal | Phys.Rev.C75:035207,2007 |
Abstract
We study the long range part of the $\Lambda$-hyperon optical potential in nuclei using Quantum Many Body techniques and flavor-SU(3) Chiral Lagrangians as starting point. More precisely, we study the contributions to the $\Lambda$-hyperon optical potential due to the long-range two-pion exchange, with $\Sigma$ and $\Sigma^*$ baryons in the internal baryonic lines and considering Nh and $\Delta$h excitations. We also consider the contribution to the spin-orbit potentials that comes out from these terms. Our results support a natural explanation of the smallness of the $\Lambda$-nuclear spin-orbit interaction and shows the importance of the $\Sigma^*$ and $\Delta$ degrees of freedom for the hyperon-nucleus interactions.
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"abstract": "We study the long range part of the $\\Lambda$-hyperon optical potential in\nnuclei using Quantum Many Body techniques and flavor-SU(3) Chiral Lagrangians\nas starting point. More precisely, we study the contributions to the\n$\\Lambda$-hyperon optical potential due to the long-range two-pion exchange,\nwith $\\Sigma$ and $\\Sigma^*$ baryons in the internal baryonic lines and\nconsidering Nh and $\\Delta$h excitations. We also consider the contribution to\nthe spin-orbit potentials that comes out from these terms. Our results support\na natural explanation of the smallness of the $\\Lambda$-nuclear spin-orbit\ninteraction and shows the importance of the $\\Sigma^*$ and $\\Delta$ degrees of\nfreedom for the hyperon-nucleus interactions.",
"arxiv_id": "nucl-th/0611082",
"authors": [
"J. Martin Camalich",
"M. J. Vicente Vacas"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.75.035207",
"journal_ref": "Phys.Rev.C75:035207,2007",
"title": "The baryon-decuplet in the chiral dynamics of Lambda-hyperons in nuclear matter",
"url": "https://arxiv.org/abs/nucl-th/0611082"
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