dorsal/arxiv
View SchemaEquation of State of Hypermatter in beta Equilibrium in a Quark Model with Excluded Volume Correction
| Authors | R. M. Aguirre, A. L. De Paoli |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9907087 |
| URL | https://arxiv.org/abs/nucl-th/9907087 |
Abstract
We study the effects of the finite size of the baryons on the equation of state of homogeneous hadronic matter with hyperons. The finite extension of hadrons is introduced in order to improve the perfomance of field theoretical models at very high densities, simulating the short-range hard-core repulsive part of the baryon-baryon potential. We choose the Quark Meson Coupling model to describe the baryon dynamics because this model provides a density dependent radius of the bag. In addition we calculate finite size corrections for the Zimanyi-Moszkowski model in order to make a definite comparison. In both cases finite size effects are implemented through a Van der Waals like correction in the normalization of the baryon fields. In this approach we investigate $\beta$-stable matter in conditions that could be found in the interior of massive stars. We find that the excluded volume corrections contribute significantly for densities above twice the symmetric nuclear matter saturation density, although for the quark model the results strongly depends upon the equilibrium conditions for the confinement volume immersed in a dense medium.
{
"annotation_id": "7bf18f06-cad5-4a84-bde9-dfb242ced1cc",
"date_created": "2026-03-02T18:00:25.206000Z",
"date_modified": "2026-03-02T18:00:25.206000Z",
"file_hash": "c49424c4577e02d9078de684d05419aa099c6f42598fcac6502cee60ef3a84f4",
"private": false,
"record": {
"abstract": "We study the effects of the finite size of the baryons on the equation of\nstate of homogeneous hadronic matter with hyperons. The finite extension of\nhadrons is introduced in order to improve the perfomance of field theoretical\nmodels at very high densities, simulating the short-range hard-core repulsive\npart of the baryon-baryon potential. We choose the Quark Meson Coupling model\nto describe the baryon dynamics because this model provides a density dependent\nradius of the bag. In addition we calculate finite size corrections for the\nZimanyi-Moszkowski model in order to make a definite comparison. In both cases\nfinite size effects are implemented through a Van der Waals like correction in\nthe normalization of the baryon fields. In this approach we investigate\n$\\beta$-stable matter in conditions that could be found in the interior of\nmassive stars. We find that the excluded volume corrections contribute\nsignificantly for densities above twice the symmetric nuclear matter saturation\ndensity, although for the quark model the results strongly depends upon the\nequilibrium conditions for the confinement volume immersed in a dense medium.",
"arxiv_id": "nucl-th/9907087",
"authors": [
"R. M. Aguirre",
"A. L. De Paoli"
],
"categories": [
"nucl-th"
],
"title": "Equation of State of Hypermatter in beta Equilibrium in a Quark Model with Excluded Volume Correction",
"url": "https://arxiv.org/abs/nucl-th/9907087"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "441d7072-43dc-4ff7-ba05-24f7d621edda",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}