dorsal/arxiv
View SchemaStrange Particles in Dense Matter and Kaon Condensates
| Authors | G. E. Brown, C. -H. Lee, R. Rapp |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9712017 |
| URL | https://arxiv.org/abs/nucl-th/9712017 |
| DOI | 10.1016/S0375-9474(98)00312-1 |
| Journal | Nucl.Phys. A639 (1998) 455-464 |
Abstract
We discuss the role of strangeness in dense matter and especially in neutron stars. The early (in density) introduction of hyperons found in many calculations is probably delayed by the decrease in vector mean field acting on the neutron. The decrease results from both conventional many-body rescattering effects and from the movement towards asymptotic freedom at high densities. Subthreshold $K^-$-meson production by the KaoS collaboration at GSI shows that the $K^-$-mass must be substantially lowered, by $\gtrsim$ 200 MeV at $\rho\sim 2\rho_0$. It is shown that explicit chiral symmetry breaking through the kaon mass may be responsible for $\Sigma^-$-nucleon and $\Xi^-$-nucleon scalar attraction being weaker than obtained by simple quark scaling. The normal mode of the strangeness minus, charge $e^-$, excitation is constructed as a linear combination of $K^-$-meson and $\Sigma^-$, neutron-hole state. Except for zero momentum, where the terms are unmixed the "kaesobar" is a linear combination of these two components.
{
"annotation_id": "00078a31-7239-428c-801e-c5499c33531d",
"date_created": "2026-03-02T18:00:22.196000Z",
"date_modified": "2026-03-02T18:00:22.196000Z",
"file_hash": "f0d4330d029047495e07773538164bccda630967c0dd0aeefbdefb2406b98024",
"private": false,
"record": {
"abstract": "We discuss the role of strangeness in dense matter and especially in neutron\nstars. The early (in density) introduction of hyperons found in many\ncalculations is probably delayed by the decrease in vector mean field acting on\nthe neutron. The decrease results from both conventional many-body rescattering\neffects and from the movement towards asymptotic freedom at high densities.\nSubthreshold $K^-$-meson production by the KaoS collaboration at GSI shows that\nthe $K^-$-mass must be substantially lowered, by $\\gtrsim$ 200 MeV at $\\rho\\sim\n2\\rho_0$. It is shown that explicit chiral symmetry breaking through the kaon\nmass may be responsible for $\\Sigma^-$-nucleon and $\\Xi^-$-nucleon scalar\nattraction being weaker than obtained by simple quark scaling. The normal mode\nof the strangeness minus, charge $e^-$, excitation is constructed as a linear\ncombination of $K^-$-meson and $\\Sigma^-$, neutron-hole state. Except for zero\nmomentum, where the terms are unmixed the \"kaesobar\" is a linear combination of\nthese two components.",
"arxiv_id": "nucl-th/9712017",
"authors": [
"G. E. Brown",
"C. -H. Lee",
"R. Rapp"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(98)00312-1",
"journal_ref": "Nucl.Phys. A639 (1998) 455-464",
"title": "Strange Particles in Dense Matter and Kaon Condensates",
"url": "https://arxiv.org/abs/nucl-th/9712017"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "61ce2260-99cf-4d64-bc3c-0d443d7a693c",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}