Hypernuclei and the hyperon problem in neutron stars
Abstract
The likely presence of $$\Lambda$$ baryons in dense hadronic matter tends to soften the equation of state to an extend that the observed heaviest neutron stars are difficult to explain. Here we analyze this "hyperon problem" with a phenomenological approach. First, we review what can be learned about the interaction of $$\Lambda$$ particle with dense matter from the observed hypernuclei and extend this phenomenological analysis to asymmetric matter. We add to this the current knowledge on non-strange dense matter, including its uncertainties, to conclude that the interaction between $$\Lambda$$s and dense matter has to become repulsive at densities below three times the nuclear saturation density.
- Authors:
-
- Univ. of Maryland, College Park, MD (United States). Dept. of Physics
- Univ. of Washington, Seattle, WA (United States). Inst. for Nuclear Theory
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1265720
- Alternate Identifier(s):
- OSTI ID: 1211572
- Grant/Contract Number:
- AC05-00OR22725; FG02-93ER-40762
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C, Nuclear Physics
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 0556-2813
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Bedaque, Paulo F., and Steiner, Andrew W. Hypernuclei and the hyperon problem in neutron stars. United States: N. p., 2015.
Web. doi:10.1103/PhysRevC.92.025803.
Bedaque, Paulo F., & Steiner, Andrew W. Hypernuclei and the hyperon problem in neutron stars. United States. https://doi.org/10.1103/PhysRevC.92.025803
Bedaque, Paulo F., and Steiner, Andrew W. Mon .
"Hypernuclei and the hyperon problem in neutron stars". United States. https://doi.org/10.1103/PhysRevC.92.025803. https://www.osti.gov/servlets/purl/1265720.
@article{osti_1265720,
title = {Hypernuclei and the hyperon problem in neutron stars},
author = {Bedaque, Paulo F. and Steiner, Andrew W.},
abstractNote = {The likely presence of $\Lambda$ baryons in dense hadronic matter tends to soften the equation of state to an extend that the observed heaviest neutron stars are difficult to explain. Here we analyze this "hyperon problem" with a phenomenological approach. First, we review what can be learned about the interaction of $\Lambda$ particle with dense matter from the observed hypernuclei and extend this phenomenological analysis to asymmetric matter. We add to this the current knowledge on non-strange dense matter, including its uncertainties, to conclude that the interaction between $\Lambda$s and dense matter has to become repulsive at densities below three times the nuclear saturation density.},
doi = {10.1103/PhysRevC.92.025803},
journal = {Physical Review C, Nuclear Physics},
number = 2,
volume = 92,
place = {United States},
year = {Mon Aug 17 00:00:00 EDT 2015},
month = {Mon Aug 17 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
journal, September 2019
- Cromartie, H. T.; Fonseca, E.; Ransom, S. M.
- Nature Astronomy