dorsal/arxiv
View SchemaChiral approach to antikaons in dense matter
| Authors | Laura Tolos, Angels Ramos, Eulogio Oset |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0609046 |
| URL | https://arxiv.org/abs/nucl-th/0609046 |
Abstract
Antikaons in dense nuclear matter are studied using a chiral unitary approach which incorporates the $s$- and p-waves of the $\bar K N$ interaction. We include, in a self-consistent way, Pauli blocking effects, meson self-energies modified by nuclear short-range correlations and baryon binding potentials. We show that the on-shell factorization cannot be applied to evaluate the in-medium corrections to p-wave amplitudes. We also obtain an attractive shift for the $\Lambda$ and $\Sigma$ masses of -30 MeV at saturation density while the $\Sigma^*$ width gets sensibly increased to about 80 MeV. The moderate attraction developed by the antikaon does not support the existence of very deep and narrow bound states.
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"abstract": "Antikaons in dense nuclear matter are studied using a chiral unitary approach\nwhich incorporates the $s$- and p-waves of the $\\bar K N$ interaction. We\ninclude, in a self-consistent way, Pauli blocking effects, meson self-energies\nmodified by nuclear short-range correlations and baryon binding potentials. We\nshow that the on-shell factorization cannot be applied to evaluate the\nin-medium corrections to p-wave amplitudes. We also obtain an attractive shift\nfor the $\\Lambda$ and $\\Sigma$ masses of -30 MeV at saturation density while\nthe $\\Sigma^*$ width gets sensibly increased to about 80 MeV. The moderate\nattraction developed by the antikaon does not support the existence of very\ndeep and narrow bound states.",
"arxiv_id": "nucl-th/0609046",
"authors": [
"Laura Tolos",
"Angels Ramos",
"Eulogio Oset"
],
"categories": [
"nucl-th",
"hep-ph"
],
"title": "Chiral approach to antikaons in dense matter",
"url": "https://arxiv.org/abs/nucl-th/0609046"
},
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