Antistars or Antimatter Cores in Mirror Neutron Stars?
The oscillation of the neutron <i>n</i> into mirror neutron <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>n</mi><mo>′</mo></msup></semantics></math&...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/8/6/313 |
| _version_ | 1797481712355115008 |
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| author | Zurab Berezhiani |
| author_facet | Zurab Berezhiani |
| author_sort | Zurab Berezhiani |
| collection | DOAJ |
| description | The oscillation of the neutron <i>n</i> into mirror neutron <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>n</mi><mo>′</mo></msup></semantics></math></inline-formula>, 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><msup><mi>n</mi><mo>′</mo></msup><mo>¯</mo></mover><mo>−</mo><mover accent="true"><mi>n</mi><mo>¯</mo></mover></mrow></semantics></math></inline-formula> 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula>-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. |
| first_indexed | 2024-03-09T22:18:29Z |
| format | Article |
| id | doaj.art-b43bcc22576f422bb8a30ea58bb863d1 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T22:18:29Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-b43bcc22576f422bb8a30ea58bb863d12023-11-23T19:19:07ZengMDPI AGUniverse2218-19972022-05-018631310.3390/universe8060313Antistars or Antimatter Cores in Mirror Neutron Stars?Zurab Berezhiani0Dipartimento di Fisica e Chimica, Università di L’Aquila, 67100 Coppito, L’Aquila, ItalyThe oscillation of the neutron <i>n</i> into mirror neutron <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>n</mi><mo>′</mo></msup></semantics></math></inline-formula>, 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><msup><mi>n</mi><mo>′</mo></msup><mo>¯</mo></mover><mo>−</mo><mover accent="true"><mi>n</mi><mo>¯</mo></mover></mrow></semantics></math></inline-formula> 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula>-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.https://www.mdpi.com/2218-1997/8/6/313dark mattermirror matterneutron oscillationantimatter |
| spellingShingle | Zurab Berezhiani Antistars or Antimatter Cores in Mirror Neutron Stars? Universe dark matter mirror matter neutron oscillation antimatter |
| title | Antistars or Antimatter Cores in Mirror Neutron Stars? |
| title_full | Antistars or Antimatter Cores in Mirror Neutron Stars? |
| title_fullStr | Antistars or Antimatter Cores in Mirror Neutron Stars? |
| title_full_unstemmed | Antistars or Antimatter Cores in Mirror Neutron Stars? |
| title_short | Antistars or Antimatter Cores in Mirror Neutron Stars? |
| title_sort | antistars or antimatter cores in mirror neutron stars |
| topic | dark matter mirror matter neutron oscillation antimatter |
| url | https://www.mdpi.com/2218-1997/8/6/313 |
| work_keys_str_mv | AT zurabberezhiani antistarsorantimattercoresinmirrorneutronstars |