Interplay of antikaons with hyperons in nuclei and in neutron stars

Possible coexistence of antikaons and hyperons in nuclei and in neutron stars is investigated based on the same interaction model within the relativistic mean-field theory. It is shown that the ground state of multi-strangeness nuclei is given by multi-hypernuclei without bound K super(-) mesons. In...

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Bibliographic Details
Published in:EPJ Web of conferences 2014-01, Vol.73, p.5007-1-05007-5
Main Authors: Muto, Takumi, Maruyama, Toshiki, Tatsumi, Toshitaka
Format: Article
Language:English
Subjects:
Condensing
Ground state
High density
Hyperons
Kaons
Neutron stars
Nuclei
Softening
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Summary:Possible coexistence of antikaons and hyperons in nuclei and in neutron stars is investigated based on the same interaction model within the relativistic mean-field theory. It is shown that the ground state of multi-strangeness nuclei is given by multi-hypernuclei without bound K super(-) mesons. In neutron stars, on the other hand, kaon condensation appears in hyperon-mixed matter for a moderate K super(-) potential depth, but it leads to significant softening of the equation of state. Some repulsive effect at high density should be taken into account so as to be consistent with recent observations of massive neutron stars.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/20147305007