Higgs relaxation after inflation
Abstract We show that the mechanism of cosmological relaxation of the electroweak scale can take place independently of the inflation mechanism, thus relieving burdens from the original relaxion proposal. What eventually stops the (fast-rolling) relaxion field during its cosmological evolution is th...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2018-10-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP10(2018)020 |
| _version_ | 1818258313151774720 |
|---|---|
| author | Nayara Fonseca Enrico Morgante Géraldine Servant |
| author_facet | Nayara Fonseca Enrico Morgante Géraldine Servant |
| author_sort | Nayara Fonseca |
| collection | DOAJ |
| description | Abstract We show that the mechanism of cosmological relaxation of the electroweak scale can take place independently of the inflation mechanism, thus relieving burdens from the original relaxion proposal. What eventually stops the (fast-rolling) relaxion field during its cosmological evolution is the production of particles whose mass is controlled by the Higgs vacuum expectation value. We first show that Higgs particle production does not work for that purpose as the Higgs field does not track the minimum of its potential in the regime where Higgs particles get efficiently produced through their coupling to the relaxion. We then focus on gauge boson production. We provide a detailed analysis of the scanning and stopping mechanism and determine the parameter space for which the relaxion mechanism can take place after inflation, while being compatible with cosmological constraints, such as the relaxion dark matter overabundance and Big Bang Nucleosynthesis. We find that the cutoff scale can be as high as two hundreds of TeV. In this approach, the relaxion sector is responsible for reheating the visible sector. The stopping barriers of the periodic potential are large and Higgs-independent, facilitating model-building. The allowed relaxion mass ranges from 200 MeV up to the weak scale. In this scenario, the relaxion field excursion is subplanckian, and is thus many orders of magnitude smaller than in the original relaxion proposal. |
| first_indexed | 2024-12-12T17:57:33Z |
| format | Article |
| id | doaj.art-e11d7a8bfca5472fb736aae7fe847c9c |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-12T17:57:33Z |
| publishDate | 2018-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-e11d7a8bfca5472fb736aae7fe847c9c2022-12-22T00:16:41ZengSpringerOpenJournal of High Energy Physics1029-84792018-10-0120181014710.1007/JHEP10(2018)020Higgs relaxation after inflationNayara Fonseca0Enrico Morgante1Géraldine Servant2DESYDESYDESYAbstract We show that the mechanism of cosmological relaxation of the electroweak scale can take place independently of the inflation mechanism, thus relieving burdens from the original relaxion proposal. What eventually stops the (fast-rolling) relaxion field during its cosmological evolution is the production of particles whose mass is controlled by the Higgs vacuum expectation value. We first show that Higgs particle production does not work for that purpose as the Higgs field does not track the minimum of its potential in the regime where Higgs particles get efficiently produced through their coupling to the relaxion. We then focus on gauge boson production. We provide a detailed analysis of the scanning and stopping mechanism and determine the parameter space for which the relaxion mechanism can take place after inflation, while being compatible with cosmological constraints, such as the relaxion dark matter overabundance and Big Bang Nucleosynthesis. We find that the cutoff scale can be as high as two hundreds of TeV. In this approach, the relaxion sector is responsible for reheating the visible sector. The stopping barriers of the periodic potential are large and Higgs-independent, facilitating model-building. The allowed relaxion mass ranges from 200 MeV up to the weak scale. In this scenario, the relaxion field excursion is subplanckian, and is thus many orders of magnitude smaller than in the original relaxion proposal.http://link.springer.com/article/10.1007/JHEP10(2018)020Beyond Standard ModelCosmology of Theories beyond the SM |
| spellingShingle | Nayara Fonseca Enrico Morgante Géraldine Servant Higgs relaxation after inflation Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM |
| title | Higgs relaxation after inflation |
| title_full | Higgs relaxation after inflation |
| title_fullStr | Higgs relaxation after inflation |
| title_full_unstemmed | Higgs relaxation after inflation |
| title_short | Higgs relaxation after inflation |
| title_sort | higgs relaxation after inflation |
| topic | Beyond Standard Model Cosmology of Theories beyond the SM |
| url | http://link.springer.com/article/10.1007/JHEP10(2018)020 |
| work_keys_str_mv | AT nayarafonseca higgsrelaxationafterinflation AT enricomorgante higgsrelaxationafterinflation AT geraldineservant higgsrelaxationafterinflation |