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Nuclear Theory

arXiv:2108.03324 (nucl-th)
[Submitted on 6 Aug 2021 (v1), last revised 9 Oct 2023 (this version, v3)]

Title:Beta equilibrium under neutron star merger conditions

Authors:Mark G. Alford, Alexander Haber, Steven P. Harris, Ziyuan Zhang
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Abstract:We calculate the nonzero-temperature correction to the beta equilibrium condition in nuclear matter under neutron star merger conditions, in the temperature range $1\,$MeV$ < T \lesssim 5\,$MeV. We improve on previous work by using a consistent description of nuclear matter based on the IUF and SFHo relativistic mean field models. This includes using relativistic dispersion relations for the nucleons, which we show is essential in these models. We find that the nonzero-temperature correction can be of order $10$ to $20\,$MeV, and plays an important role in the correct calculation of Urca rates, which can be wrong by factors of $10$ or more if it is neglected.
Comments: v2: version published in Universe, minor changes in nomenclature, 20 pages, 14 figures v3: corrected typo in Eq.(C19)
Subjects: Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE)
Report number: INT-PUB-21-017
Cite as: arXiv:2108.03324 [nucl-th]
  (or arXiv:2108.03324v3 [nucl-th] for this version)
  https://doi.org/10.48550/arXiv.2108.03324
Journal reference: Universe 2021, 7(11), 399
Related DOI: https://doi.org/10.3390/universe7110399

Submission history

From: Alexander Haber [view email]
[v1] Fri, 6 Aug 2021 22:40:50 UTC (6,722 KB)
[v2] Tue, 2 Nov 2021 18:59:50 UTC (3,372 KB)
[v3] Mon, 9 Oct 2023 15:44:49 UTC (3,374 KB)
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