Higgs stability-bound and fermionic dark matter
Higgs-portal interactions of fermionic dark matter - in contrast to fermions coupled via Yukawa interactions - can have a stabilizing effect on the standard-model Higgs potential. A non-perturbative renormalization-group analysis reveals that, similar to higher-order operators in the Higgs potential...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
25 February 2019
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| In: |
Journal of high energy physics
Year: 2019, Issue: 2 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP02(2019)166 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1007/JHEP02(2019)166
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| Author Notes: | Aaron Held and René Sondenheimer |
| Summary: | Higgs-portal interactions of fermionic dark matter - in contrast to fermions coupled via Yukawa interactions - can have a stabilizing effect on the standard-model Higgs potential. A non-perturbative renormalization-group analysis reveals that, similar to higher-order operators in the Higgs potential itself, the fermionic portal coupling can increase the metastability scale by only about one order of magnitude. Assuming a thermal freeze-out via the Higgs-portal coupling, this regime of very weakly coupled dark matter is in conflict with relic-density constraints. Conversely, fermionic dark matter with the right relic abundance requires either a low cutoff scale of the effective field theory or a strongly interacting scalar sector. This results in a triviality problem in the scalar sector which persists at the non-perturbative level. The corresponding breakdown of the effective field theory suggests a larger dark sector to be present not too far above the dark-fermion mass-scale. |
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| Item Description: | Gesehen am 18.07.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP02(2019)166 |