Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis
Abstract The quantum chromodynamics axion with a decay constant near the Grand Unification (GUT) scale has an ultralight mass near a neV. We show, however, that axion-like particles with masses near the keV–PeV range with GUT-scale decay constants are also well...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2023
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| Online Access: | https://hdl.handle.net/1721.1/146945 |
| _version_ | 1811071997928538112 |
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| author | Foster, Joshua W. Kumar, Soubhik Safdi, Benjamin R. Soreq, Yotam |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Foster, Joshua W. Kumar, Soubhik Safdi, Benjamin R. Soreq, Yotam |
| author_sort | Foster, Joshua W. |
| collection | MIT |
| description | Abstract
The quantum chromodynamics axion with a decay constant near the Grand Unification (GUT) scale has an ultralight mass near a neV. We show, however, that axion-like particles with masses near the keV–PeV range with GUT-scale decay constants are also well motivated in that they naturally arise from axiverse theories with dark c gauge groups. We demonstrate that the correct dark matter abundance may be achieved by the heavy axions in these models through the misalignment mechanism in combination with a period of early matter domination from the long-lived dark glueballs of the same gauge group. Heavy axion dark matter may decay to two photons, yielding mono-energetic electromagnetic signatures that may be detectable by current or next-generation space-based telescopes. We project the sensitivity of next-generation telescopes including Athena, AMEGO, and e-ASTROGAM to such decaying axion dark matter. If the dark sector contains multiple confining gauge groups, then the observed primordial baryon asymmetry may also be achieved in this scenario through spontaneous baryogenesis. We present explicit orbifold constructions where the dark gauge groups unify with the SM at the GUT scale and axions emerge as the fifth components of dark gauge fields with bulk Chern-Simons terms. |
| first_indexed | 2024-09-23T08:59:16Z |
| format | Article |
| id | mit-1721.1/146945 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:59:16Z |
| publishDate | 2023 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1469452023-12-08T20:21:55Z Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis Foster, Joshua W. Kumar, Soubhik Safdi, Benjamin R. Soreq, Yotam Massachusetts Institute of Technology. Center for Theoretical Physics Abstract The quantum chromodynamics axion with a decay constant near the Grand Unification (GUT) scale has an ultralight mass near a neV. We show, however, that axion-like particles with masses near the keV–PeV range with GUT-scale decay constants are also well motivated in that they naturally arise from axiverse theories with dark c gauge groups. We demonstrate that the correct dark matter abundance may be achieved by the heavy axions in these models through the misalignment mechanism in combination with a period of early matter domination from the long-lived dark glueballs of the same gauge group. Heavy axion dark matter may decay to two photons, yielding mono-energetic electromagnetic signatures that may be detectable by current or next-generation space-based telescopes. We project the sensitivity of next-generation telescopes including Athena, AMEGO, and e-ASTROGAM to such decaying axion dark matter. If the dark sector contains multiple confining gauge groups, then the observed primordial baryon asymmetry may also be achieved in this scenario through spontaneous baryogenesis. We present explicit orbifold constructions where the dark gauge groups unify with the SM at the GUT scale and axions emerge as the fifth components of dark gauge fields with bulk Chern-Simons terms. 2023-01-03T13:54:20Z 2023-01-03T13:54:20Z 2022-12-20 2022-12-25T04:11:24Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/146945 Journal of High Energy Physics. 2022 Dec 20;2022(12):119 PUBLISHER_CC en https://doi.org/10.1007/JHEP12(2022)119 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Foster, Joshua W. Kumar, Soubhik Safdi, Benjamin R. Soreq, Yotam Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis |
| title | Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis |
| title_full | Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis |
| title_fullStr | Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis |
| title_full_unstemmed | Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis |
| title_short | Dark Grand Unification in the axiverse: decaying axion dark matter and spontaneous baryogenesis |
| title_sort | dark grand unification in the axiverse decaying axion dark matter and spontaneous baryogenesis |
| url | https://hdl.handle.net/1721.1/146945 |
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