Cosmological signals of a mirror twin Higgs
Abstract We investigate the cosmology of the minimal model of neutral naturalness, the mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin counterpart leads to significant dark radiation in tension with BBN and CMB observations. We quantify this tension and i...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-05-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP05(2017)038 |
| _version_ | 1818273717097070592 |
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| author | Nathaniel Craig Seth Koren Timothy Trott |
| author_facet | Nathaniel Craig Seth Koren Timothy Trott |
| author_sort | Nathaniel Craig |
| collection | DOAJ |
| description | Abstract We investigate the cosmology of the minimal model of neutral naturalness, the mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin counterpart leads to significant dark radiation in tension with BBN and CMB observations. We quantify this tension and illustrate how it can be mitigated in several simple scenarios that alter the relative energy densities of the two sectors while respecting the softly-broken mirror symmetry. In particular, we consider both the out-of-equilibrium decay of a new scalar as well as reheating in a toy model of twinned inflation, Twinflation. In both cases the dilution of energy density in the twin sector does not merely reconcile the existence of a mirror Twin Higgs with cosmological constraints, but predicts contributions to cosmological observables that may be probed in current and future CMB experiments. This raises the prospect of discovering evidence of neutral naturalness through cosmology rather than colliders. |
| first_indexed | 2024-12-12T22:02:24Z |
| format | Article |
| id | doaj.art-e4ce1f1794f5498c912ff0ae558200c0 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-12T22:02:24Z |
| publishDate | 2017-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-e4ce1f1794f5498c912ff0ae558200c02022-12-22T00:10:29ZengSpringerOpenJournal of High Energy Physics1029-84792017-05-012017514710.1007/JHEP05(2017)038Cosmological signals of a mirror twin HiggsNathaniel Craig0Seth Koren1Timothy Trott2Department of Physics, University of CaliforniaDepartment of Physics, University of CaliforniaDepartment of Physics, University of CaliforniaAbstract We investigate the cosmology of the minimal model of neutral naturalness, the mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin counterpart leads to significant dark radiation in tension with BBN and CMB observations. We quantify this tension and illustrate how it can be mitigated in several simple scenarios that alter the relative energy densities of the two sectors while respecting the softly-broken mirror symmetry. In particular, we consider both the out-of-equilibrium decay of a new scalar as well as reheating in a toy model of twinned inflation, Twinflation. In both cases the dilution of energy density in the twin sector does not merely reconcile the existence of a mirror Twin Higgs with cosmological constraints, but predicts contributions to cosmological observables that may be probed in current and future CMB experiments. This raises the prospect of discovering evidence of neutral naturalness through cosmology rather than colliders.http://link.springer.com/article/10.1007/JHEP05(2017)038Beyond Standard ModelCosmology of Theories beyond the SM |
| spellingShingle | Nathaniel Craig Seth Koren Timothy Trott Cosmological signals of a mirror twin Higgs Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM |
| title | Cosmological signals of a mirror twin Higgs |
| title_full | Cosmological signals of a mirror twin Higgs |
| title_fullStr | Cosmological signals of a mirror twin Higgs |
| title_full_unstemmed | Cosmological signals of a mirror twin Higgs |
| title_short | Cosmological signals of a mirror twin Higgs |
| title_sort | cosmological signals of a mirror twin higgs |
| topic | Beyond Standard Model Cosmology of Theories beyond the SM |
| url | http://link.springer.com/article/10.1007/JHEP05(2017)038 |
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