A simultaneous study of dark matter and phase transition: two-scalar scenario
Abstract The simplest extension of the Standard Model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. However, after imposing the invisible Higgs decay constraint...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-12-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP12(2019)077 |
| _version_ | 1819132592344006656 |
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| author | Karim Ghorbani Parsa Hossein Ghorbani |
| author_facet | Karim Ghorbani Parsa Hossein Ghorbani |
| author_sort | Karim Ghorbani |
| collection | DOAJ |
| description | Abstract The simplest extension of the Standard Model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. However, after imposing the invisible Higgs decay constraint from the LHC, the parameter space of the single scalar model shrinks to regions with only a few percentage of the DM relic abundance and when adding the direct detection bound, e.g. from XENON100, it gets excluded completely. In this paper, we extend the Standard Model with two real gauge singlet scalars, here s and s ′ , and show that the electroweak symmetry breaking may occur via different channels. Despite very restrictive first-order phase transition conditions for the two-scalar model in comparison to the single scalar model, there is a viable space of parameters in different phase transition channels that simultaneously explains a fraction or the whole dark matter relic density, a strongly first-order electroweak phase transition and still evading the direct detection bounds from the latest LUX/XENON experiments while respecting the invisible Higgs decay width constraint from the LHC. |
| first_indexed | 2024-12-22T09:33:51Z |
| format | Article |
| id | doaj.art-336dce773bec4ee9b8b1d5ec5c365888 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-22T09:33:51Z |
| publishDate | 2019-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-336dce773bec4ee9b8b1d5ec5c3658882022-12-21T18:30:53ZengSpringerOpenJournal of High Energy Physics1029-84792019-12-0120191213210.1007/JHEP12(2019)077A simultaneous study of dark matter and phase transition: two-scalar scenarioKarim Ghorbani0Parsa Hossein Ghorbani1Physics Department, Faculty of Sciences, Arak UniversityDepartment of Physics, Faculty of Science, Ferdowsi University of MashhadAbstract The simplest extension of the Standard Model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. However, after imposing the invisible Higgs decay constraint from the LHC, the parameter space of the single scalar model shrinks to regions with only a few percentage of the DM relic abundance and when adding the direct detection bound, e.g. from XENON100, it gets excluded completely. In this paper, we extend the Standard Model with two real gauge singlet scalars, here s and s ′ , and show that the electroweak symmetry breaking may occur via different channels. Despite very restrictive first-order phase transition conditions for the two-scalar model in comparison to the single scalar model, there is a viable space of parameters in different phase transition channels that simultaneously explains a fraction or the whole dark matter relic density, a strongly first-order electroweak phase transition and still evading the direct detection bounds from the latest LUX/XENON experiments while respecting the invisible Higgs decay width constraint from the LHC.https://doi.org/10.1007/JHEP12(2019)077Beyond Standard ModelCosmology of Theories beyond the SM |
| spellingShingle | Karim Ghorbani Parsa Hossein Ghorbani A simultaneous study of dark matter and phase transition: two-scalar scenario Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM |
| title | A simultaneous study of dark matter and phase transition: two-scalar scenario |
| title_full | A simultaneous study of dark matter and phase transition: two-scalar scenario |
| title_fullStr | A simultaneous study of dark matter and phase transition: two-scalar scenario |
| title_full_unstemmed | A simultaneous study of dark matter and phase transition: two-scalar scenario |
| title_short | A simultaneous study of dark matter and phase transition: two-scalar scenario |
| title_sort | simultaneous study of dark matter and phase transition two scalar scenario |
| topic | Beyond Standard Model Cosmology of Theories beyond the SM |
| url | https://doi.org/10.1007/JHEP12(2019)077 |
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