dorsal/arxiv
View SchemaThe properties of \bar{K} in the nuclear medium
| Authors | A. Ramos, E. Oset |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9906016 |
| URL | https://arxiv.org/abs/nucl-th/9906016 |
| DOI | 10.1016/S0375-9474(99)00846-5 |
| Journal | Nucl.Phys. A671 (2000) 481-502 |
Abstract
The self-energy of the K^- meson in nuclear matter is calculated in a self-consistent microscopic approach, using a \bar{K}N interaction obtained from the lowest-order meson-baryon chiral Lagrangian. The effective \bar{K}N interaction in the medium is derived by solving the coupled-channel Bethe-Salpeter equation including Pauli blocking on the nucleons, mean-field binding potentials for the baryons and the self-energy of the \pi and \bar{K} mesons. The incorporation of the self-consistent {\bar K} self-energy in the description, in addition to the Pauli blocking effects, yields a weaker attractive in-medium {\bar K}N interaction and a \Lambda(1405) which dissolves faster with increasing matter density, as a result of the {\bar K} spectral function being spread out over a wide range of energies. These effects are further magnified when the intermediate pions are dressed.
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"abstract": "The self-energy of the K^- meson in nuclear matter is calculated in a\nself-consistent microscopic approach, using a \\bar{K}N interaction obtained\nfrom the lowest-order meson-baryon chiral Lagrangian. The effective \\bar{K}N\ninteraction in the medium is derived by solving the coupled-channel\nBethe-Salpeter equation including Pauli blocking on the nucleons, mean-field\nbinding potentials for the baryons and the self-energy of the \\pi and \\bar{K}\nmesons. The incorporation of the self-consistent {\\bar K} self-energy in the\ndescription, in addition to the Pauli blocking effects, yields a weaker\nattractive in-medium {\\bar K}N interaction and a \\Lambda(1405) which dissolves\nfaster with increasing matter density, as a result of the {\\bar K} spectral\nfunction being spread out over a wide range of energies. These effects are\nfurther magnified when the intermediate pions are dressed.",
"arxiv_id": "nucl-th/9906016",
"authors": [
"A. Ramos",
"E. Oset"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(99)00846-5",
"journal_ref": "Nucl.Phys. A671 (2000) 481-502",
"title": "The properties of \\bar{K} in the nuclear medium",
"url": "https://arxiv.org/abs/nucl-th/9906016"
},
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