dorsal/arxiv
View SchemaSuperfluidity of $\Sigma^-$ hyperons in $\beta$-stable neutron star matter
| Authors | Isaac Vidana, Laura Tolos |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0405010 |
| URL | https://arxiv.org/abs/nucl-th/0405010 |
| DOI | 10.1103/PhysRevC.70.028802 |
| Journal | Phys.Rev. C70 (2004) 028802 |
Abstract
In this work we evaluate the $^1S_0$ energy gap of $\Sigma^-$ hyperons in $\beta$-stable neutron star matter. We solve the BCS gap equation for an effective $\Sigma^-\Sigma^-$ pairing interaction derived from the most recent parametrization of the hyperon-hyperon interaction constructed by the Nijmegen group. We find that the $\Sigma^-$ hyperons are in a $^1S_0$ superfluid state in the density region $\sim 0.27-0.7$ fm$^{-3}$, with a maximum energy gap of order 8 MeV at a total baryon number density of $\sim 0.37$ fm$^{-3}$ and a $\Sigma^-$ fraction of about 8%. We examine the implications on neutron star cooling.
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"abstract": "In this work we evaluate the $^1S_0$ energy gap of $\\Sigma^-$ hyperons in\n$\\beta$-stable neutron star matter. We solve the BCS gap equation for an\neffective $\\Sigma^-\\Sigma^-$ pairing interaction derived from the most recent\nparametrization of the hyperon-hyperon interaction constructed by the Nijmegen\ngroup. We find that the $\\Sigma^-$ hyperons are in a $^1S_0$ superfluid state\nin the density region $\\sim 0.27-0.7$ fm$^{-3}$, with a maximum energy gap of\norder 8 MeV at a total baryon number density of $\\sim 0.37$ fm$^{-3}$ and a\n$\\Sigma^-$ fraction of about 8%. We examine the implications on neutron star\ncooling.",
"arxiv_id": "nucl-th/0405010",
"authors": [
"Isaac Vidana",
"Laura Tolos"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.70.028802",
"journal_ref": "Phys.Rev. C70 (2004) 028802",
"title": "Superfluidity of $\\Sigma^-$ hyperons in $\\beta$-stable neutron star matter",
"url": "https://arxiv.org/abs/nucl-th/0405010"
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