Multi-component dark sectors: symmetries, asymmetries and conversions
Abstract We study the relic abundance of several stable particles from a generic dark sector, including the possible presence of dark asymmetries. After discussing the different possibilities for stabilising multi-component dark matter, we analyse the final relic abundance of the symmetric and asymm...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-10-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP10(2022)075 |
| _version_ | 1817983916335693824 |
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| author | Arnau Bas i Beneito Juan Herrero-García Drona Vatsyayan |
| author_facet | Arnau Bas i Beneito Juan Herrero-García Drona Vatsyayan |
| author_sort | Arnau Bas i Beneito |
| collection | DOAJ |
| description | Abstract We study the relic abundance of several stable particles from a generic dark sector, including the possible presence of dark asymmetries. After discussing the different possibilities for stabilising multi-component dark matter, we analyse the final relic abundance of the symmetric and asymmetric dark matter components, paying special attention to the role of the unavoidable conversions between dark matter states. We find an exponential dependence of the asymmetries of the heavier components on annihilations and conversions. We conclude that having similar symmetric and asymmetric components is a natural outcome in many scenarios of multi-component dark matter. This has novel phenomenological implications, which we briefly discuss. |
| first_indexed | 2024-04-13T23:39:07Z |
| format | Article |
| id | doaj.art-8f2e022a88d44ea8b35c5fb52e885b1e |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-13T23:39:07Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-8f2e022a88d44ea8b35c5fb52e885b1e2022-12-22T02:24:37ZengSpringerOpenJournal of High Energy Physics1029-84792022-10-0120221013110.1007/JHEP10(2022)075Multi-component dark sectors: symmetries, asymmetries and conversionsArnau Bas i Beneito0Juan Herrero-García1Drona Vatsyayan2Departamento de Física Teórica, Universidad de Valencia and IFIC, Universidad de Valencia-CSICDepartamento de Física Teórica, Universidad de Valencia and IFIC, Universidad de Valencia-CSICDepartamento de Física Teórica, Universidad de Valencia and IFIC, Universidad de Valencia-CSICAbstract We study the relic abundance of several stable particles from a generic dark sector, including the possible presence of dark asymmetries. After discussing the different possibilities for stabilising multi-component dark matter, we analyse the final relic abundance of the symmetric and asymmetric dark matter components, paying special attention to the role of the unavoidable conversions between dark matter states. We find an exponential dependence of the asymmetries of the heavier components on annihilations and conversions. We conclude that having similar symmetric and asymmetric components is a natural outcome in many scenarios of multi-component dark matter. This has novel phenomenological implications, which we briefly discuss.https://doi.org/10.1007/JHEP10(2022)075Models for Dark MatterParticle Nature of Dark Matter |
| spellingShingle | Arnau Bas i Beneito Juan Herrero-García Drona Vatsyayan Multi-component dark sectors: symmetries, asymmetries and conversions Journal of High Energy Physics Models for Dark Matter Particle Nature of Dark Matter |
| title | Multi-component dark sectors: symmetries, asymmetries and conversions |
| title_full | Multi-component dark sectors: symmetries, asymmetries and conversions |
| title_fullStr | Multi-component dark sectors: symmetries, asymmetries and conversions |
| title_full_unstemmed | Multi-component dark sectors: symmetries, asymmetries and conversions |
| title_short | Multi-component dark sectors: symmetries, asymmetries and conversions |
| title_sort | multi component dark sectors symmetries asymmetries and conversions |
| topic | Models for Dark Matter Particle Nature of Dark Matter |
| url | https://doi.org/10.1007/JHEP10(2022)075 |
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