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A Matter-Antimatter Universe?
We ask whether the universe can be a patchwork consisting of distinct regions of matter and antimatter. We demonstrate that, after recombination, it is impossible to avoid annihilation near regional boundaries. We study the dynamics of this process to estimate two of its signatures: a contribution t...
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
1997
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1086/305328 http://cds.cern.ch/record/329585 |
| _version_ | 1780891067442266112 |
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| author | Cohen, Andrew G. De Rujula, A. Glashow, S.L. |
| author_facet | Cohen, Andrew G. De Rujula, A. Glashow, S.L. |
| author_sort | Cohen, Andrew G. |
| collection | CERN |
| description | We ask whether the universe can be a patchwork consisting of distinct regions of matter and antimatter. We demonstrate that, after recombination, it is impossible to avoid annihilation near regional boundaries. We study the dynamics of this process to estimate two of its signatures: a contribution to the cosmic diffuse gamma-ray background and a distortion of the cosmic microwave background. The former signal exceeds observational limits unless the matter domain we inhabit is virtually the entire visible universe. On general grounds, we conclude that a matter-antimatter symmetric universe is empirically excluded. |
| id | cern-329585 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1997 |
| record_format | invenio |
| spelling | cern-3295852023-03-12T05:49:49Zdoi:10.1086/305328http://cds.cern.ch/record/329585engCohen, Andrew G.De Rujula, A.Glashow, S.L.A Matter-Antimatter Universe?Astrophysics and AstronomyWe ask whether the universe can be a patchwork consisting of distinct regions of matter and antimatter. We demonstrate that, after recombination, it is impossible to avoid annihilation near regional boundaries. We study the dynamics of this process to estimate two of its signatures: a contribution to the cosmic diffuse gamma-ray background and a distortion of the cosmic microwave background. The former signal exceeds observational limits unless the matter domain we inhabit is virtually the entire visible universe. On general grounds, we conclude that a matter-antimatter symmetric universe is empirically excluded.We ask whether the universe can be a patchwork consisting of distinct regions of matter and antimatter. We demonstrate that, after recombination, it is impossible to avoid annihilation near regional boundaries. We study the dynamics of this process to estimate two of its signatures: a contribution to the cosmic diffuse gamma-ray background and a distortion of the cosmic microwave background. The former signal exceeds observational limits unless the matter domain we inhabit is virtually the entire visible universe. On general grounds, we conclude that a matter-antimatter symmetric universe is empirically excluded.astro-ph/9707087BUHEP-97-19CERN-TH-97-154BU-HEP-97-19CERN-TH-97-154oai:cds.cern.ch:3295851997-07-08 |
| spellingShingle | Astrophysics and Astronomy Cohen, Andrew G. De Rujula, A. Glashow, S.L. A Matter-Antimatter Universe? |
| title | A Matter-Antimatter Universe? |
| title_full | A Matter-Antimatter Universe? |
| title_fullStr | A Matter-Antimatter Universe? |
| title_full_unstemmed | A Matter-Antimatter Universe? |
| title_short | A Matter-Antimatter Universe? |
| title_sort | matter-antimatter universe? |
| topic | Astrophysics and Astronomy |
| url | https://dx.doi.org/10.1086/305328 http://cds.cern.ch/record/329585 |
| work_keys_str_mv | AT cohenandrewg amatterantimatteruniverse AT derujulaa amatterantimatteruniverse AT glashowsl amatterantimatteruniverse AT cohenandrewg matterantimatteruniverse AT derujulaa matterantimatteruniverse AT glashowsl matterantimatteruniverse |