Antistars or Antimatter Cores in Mirror Neutron Stars?

The oscillation of the neutron n into mirror neutron n′, its partner from the dark mirror sector, can gradually transform an ordinary neutron star into a mixed star consisting in part of mirror dark matter. The implications of the reverse process taking place in the mirror neutron stars depend on th...

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Bibliographic Details
Published in:Universe (Basel) 2022-06, Vol.8 (6), p.313
Main Author: Berezhiani, Zurab
Format: Article
Language:English
Subjects:
Antimatter
Astronomical research
Asymmetry
Atoms & subatomic particles
Cores
Cosmic rays
Dark matter
Dark matter (Astronomy)
Experiments
mirror matter
neutron oscillation
Neutron stars
Neutrons
Universe
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Summary:The oscillation of the neutron n into mirror neutron n′, its partner from the dark mirror sector, can gradually transform an ordinary neutron star into a mixed star consisting in part of mirror dark matter. The implications of the reverse process taking place in the mirror neutron stars depend on the sign of baryon asymmetry in the mirror sector. Namely, if it is negative, as predicted by certain baryogenesis scenarios, then n′¯−n¯ transitions create a core of our antimatter gravitationally trapped in the mirror star interior. The annihilation of accreted gas on such antimatter cores could explain the origin of γ-source candidates with an unusual spectrum compatible with baryon–antibaryon annihilation, recently identified in the Fermi LAT catalog. In addition, some part of this antimatter escaping after the mergers of mirror neutron stars can produce the flux of cosmic antihelium and also heavier antinuclei which are hunted in the AMS-02 experiment.
ISSN:2218-1997
2218-1997
DOI:10.3390/universe8060313