Symmetry Parameter Constraints from a Lower Bound on Neutron-matter Energy
Abstract
We propose the existence of a lower bound on the energy of pure neutron matter (PNM) on the basis of unitary-gas considerations. We discuss its justification from experimental studies of cold atoms as well as from theoretical studies of neutron matter. We demonstrate that this bound results in limits to the density-dependent symmetry energy, which is the difference between the energies of symmetric nuclear matter and PNM. In particular, this bound leads to a lower limit to the volume symmetry energy parameter S 0. In addition, for assumed values of S 0 above this minimum, this bound implies both upper and lower limits to the symmetry energy slope parameter L ,which describes the lowest-order density dependence of the symmetry energy. A lower bound on neutron-matter incompressibility is also obtained. These bounds are found to be consistent with both recent calculations of the energies of PNM and constraints from nuclear experiments. Our results are significant because several equations of state that are currently used in astrophysical simulations of supernovae and neutron star mergers, as well as in nuclear physics simulations of heavy-ion collisions, have symmetry energy parameters that violate these bounds. Furthermore, below the nuclear saturation density, the bound on neutron-mattermore »
- Authors:
-
[1];
[2];
[3];
[4]
- Univ. of Washington, Seattle, WA (United States); Michigan State Univ., East Lansing, MI (United States)
- Stony Brook Univ., NY (United States)
- Kyoto Univ. (Japan)
- Matej Bel Univ. (Slovakia); Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States); State Univ. of New York (SUNY), Albany, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1537293
- Grant/Contract Number:
- FG02-00ER41132; FG02-87ER40317
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 848; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Astronomy & Astrophysics
Citation Formats
Tews, Ingo, Lattimer, James M., Ohnishi, Akira, and Kolomeitsev, Evgeni E. Symmetry Parameter Constraints from a Lower Bound on Neutron-matter Energy. United States: N. p., 2017.
Web. doi:10.3847/1538-4357/aa8db9.
Tews, Ingo, Lattimer, James M., Ohnishi, Akira, & Kolomeitsev, Evgeni E. Symmetry Parameter Constraints from a Lower Bound on Neutron-matter Energy. United States. https://doi.org/10.3847/1538-4357/aa8db9
Tews, Ingo, Lattimer, James M., Ohnishi, Akira, and Kolomeitsev, Evgeni E. Fri .
"Symmetry Parameter Constraints from a Lower Bound on Neutron-matter Energy". United States. https://doi.org/10.3847/1538-4357/aa8db9. https://www.osti.gov/servlets/purl/1537293.
@article{osti_1537293,
title = {Symmetry Parameter Constraints from a Lower Bound on Neutron-matter Energy},
author = {Tews, Ingo and Lattimer, James M. and Ohnishi, Akira and Kolomeitsev, Evgeni E.},
abstractNote = {We propose the existence of a lower bound on the energy of pure neutron matter (PNM) on the basis of unitary-gas considerations. We discuss its justification from experimental studies of cold atoms as well as from theoretical studies of neutron matter. We demonstrate that this bound results in limits to the density-dependent symmetry energy, which is the difference between the energies of symmetric nuclear matter and PNM. In particular, this bound leads to a lower limit to the volume symmetry energy parameter S 0. In addition, for assumed values of S 0 above this minimum, this bound implies both upper and lower limits to the symmetry energy slope parameter L ,which describes the lowest-order density dependence of the symmetry energy. A lower bound on neutron-matter incompressibility is also obtained. These bounds are found to be consistent with both recent calculations of the energies of PNM and constraints from nuclear experiments. Our results are significant because several equations of state that are currently used in astrophysical simulations of supernovae and neutron star mergers, as well as in nuclear physics simulations of heavy-ion collisions, have symmetry energy parameters that violate these bounds. Furthermore, below the nuclear saturation density, the bound on neutron-matter energies leads to a lower limit to the density-dependent symmetry energy, which leads to upper limits to the nuclear surface symmetry parameter and the neutron-star crust–core boundary. We also obtain a lower limit to the neutron-skin thicknesses of neutron-rich nuclei. Above the nuclear saturation density, the bound on neutron-matter energies also leads to an upper limit to the symmetry energy, with implications for neutron-star cooling via the direct Urca process.},
doi = {10.3847/1538-4357/aa8db9},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 848,
place = {United States},
year = {Fri Oct 20 00:00:00 EDT 2017},
month = {Fri Oct 20 00:00:00 EDT 2017}
}
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Constraining nuclear matter parameters with GW170817
text, January 2018
- Carson, Zack; Steiner, Andrew W.; Yagi, Kent
- arXiv
Comparing treatments of weak reactions with nuclei in simulations of core-collapse supernovae
text, January 2018
- Nagakura, Hiroki; Furusawa, Shun; Togashi, Hajime
- arXiv
A General-relativistic Determination of the Threshold Mass to Prompt Collapse in Binary Neutron Star Mergers
text, January 2019
- Köppel, Sven; Bovard, Luke; Rezzolla, Luciano
- arXiv
Three-Dimensional Supernova Explosion Simulations of 9-, 10-, 11-, 12-, and 13-M$_{\odot}$ Stars
text, January 2019
- Burrows, Adam; Radice, David; Vartanyan, David
- arXiv
The impact of the crust equation of state on the analysis of GW170817
text, January 2019
- Gamba, Rossella; Read, Jocelyn S.; Wade, Leslie E.
- arXiv
Relativistic self-energy decomposition of nuclear symmetry energy and equation of state of neutron matter within QCD sum rules
text, January 2019
- Cai, Bao-Jun; Chen, Lie-Wen
- arXiv
Signatures for quark matter from multi-messenger observations
text, January 2019
- Alford, Mark G.; Han, Sophia; Schwenzer, Kai
- arXiv
Cooling timescale for protoneutron stars and properties of nuclear matter: Effective mass and symmetry energy at high densities
text, January 2019
- Nakazato, Ken'ichiro; Suzuki, Hideyuki
- arXiv
Effects of nuclear symmetry energy and equation of state on neutron star properties
text, January 2019
- Ji, Fan; Hu, Jinniu; Bao, Shishao
- arXiv