Asymptotic safety in the dark
Abstract We explore the Renormalization Group flow of massive uncharged fermions — a candidate for dark matter — coupled to a scalar field through a Higgs portal. We find that fermionic fluctuations can lower the bound on the scalar mass that arises from vacuum stability. Further, we discuss that de...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-08-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP08(2018)147 |
| _version_ | 1819261397022801920 |
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| author | Astrid Eichhorn Aaron Held Peter Vander Griend |
| author_facet | Astrid Eichhorn Aaron Held Peter Vander Griend |
| author_sort | Astrid Eichhorn |
| collection | DOAJ |
| description | Abstract We explore the Renormalization Group flow of massive uncharged fermions — a candidate for dark matter — coupled to a scalar field through a Higgs portal. We find that fermionic fluctuations can lower the bound on the scalar mass that arises from vacuum stability. Further, we discuss that despite the perturbative nonrenormalizability of the model, it could be ultraviolet complete at an asymptotically safe fixed point. In our approximation, this simple model exhibits two mechanisms for asymptotic safety: a balance of fermionic and bosonic fluctuations generates a fixed point in the scalar self-interaction; asymptotic safety in the portal coupling is triggered through a balance of canonical scaling and quantum fluctuations. As a consequence of asymptotic safety in the dark sector, the low-energy value of the portal coupling could become a function of the dark fermion mass and the scalar mass, thereby reducing the viable parameter space of the model. |
| first_indexed | 2024-12-23T19:41:09Z |
| format | Article |
| id | doaj.art-c0acc6d69c334e27bb89d4f3a8d7e40c |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-23T19:41:09Z |
| publishDate | 2018-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-c0acc6d69c334e27bb89d4f3a8d7e40c2022-12-21T17:33:39ZengSpringerOpenJournal of High Energy Physics1029-84792018-08-012018812510.1007/JHEP08(2018)147Asymptotic safety in the darkAstrid Eichhorn0Aaron Held1Peter Vander Griend2Institut für Theoretische Physik, Universität HeidelbergInstitut für Theoretische Physik, Universität HeidelbergInstitut für Theoretische Physik, Universität HeidelbergAbstract We explore the Renormalization Group flow of massive uncharged fermions — a candidate for dark matter — coupled to a scalar field through a Higgs portal. We find that fermionic fluctuations can lower the bound on the scalar mass that arises from vacuum stability. Further, we discuss that despite the perturbative nonrenormalizability of the model, it could be ultraviolet complete at an asymptotically safe fixed point. In our approximation, this simple model exhibits two mechanisms for asymptotic safety: a balance of fermionic and bosonic fluctuations generates a fixed point in the scalar self-interaction; asymptotic safety in the portal coupling is triggered through a balance of canonical scaling and quantum fluctuations. As a consequence of asymptotic safety in the dark sector, the low-energy value of the portal coupling could become a function of the dark fermion mass and the scalar mass, thereby reducing the viable parameter space of the model.http://link.springer.com/article/10.1007/JHEP08(2018)147Renormalization GroupBeyond Standard ModelEffective Field Theories |
| spellingShingle | Astrid Eichhorn Aaron Held Peter Vander Griend Asymptotic safety in the dark Journal of High Energy Physics Renormalization Group Beyond Standard Model Effective Field Theories |
| title | Asymptotic safety in the dark |
| title_full | Asymptotic safety in the dark |
| title_fullStr | Asymptotic safety in the dark |
| title_full_unstemmed | Asymptotic safety in the dark |
| title_short | Asymptotic safety in the dark |
| title_sort | asymptotic safety in the dark |
| topic | Renormalization Group Beyond Standard Model Effective Field Theories |
| url | http://link.springer.com/article/10.1007/JHEP08(2018)147 |
| work_keys_str_mv | AT astrideichhorn asymptoticsafetyinthedark AT aaronheld asymptoticsafetyinthedark AT petervandergriend asymptoticsafetyinthedark |