Hypernuclei and the hyperon problem in neutron stars

Bedaque, Paulo F.; Steiner, Andrew W.

doi:10.1103/PhysRevC.92.025803

Title: Hypernuclei and the hyperon problem in neutron stars

Journal Article · Mon Aug 17 00:00:00 EDT 2015 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.92.025803· OSTI ID:1265720

Bedaque, Paulo F. ^[1]; Steiner, Andrew W. ^[2]

Univ. of Maryland, College Park, MD (United States). Dept. of Physics
Univ. of Washington, Seattle, WA (United States). Inst. for Nuclear Theory

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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-00OR22725; FG02-93ER-40762

OSTI ID:: 1265720

Alternate ID(s):: OSTI ID: 1211572

Journal Information:: Physical Review C, Nuclear Physics, Vol. 92, Issue 2; ISSN 0556-2813

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar Cromartie, H. T.; Fonseca, E.; Ransom, S. M. Nature Astronomy https://doi.org/10.1038/s41550-019-0880-2	journal	September 2019

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