Singlet-assisted electroweak phase transition at two loops
Fuente:
arXiv
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2021
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866916145327505408 |
|---|---|
| author | Niemi, Lauri Schicho, Philipp Tenkanen, Tuomas V. I. |
| author_facet | Niemi, Lauri Schicho, Philipp Tenkanen, Tuomas V. I. |
| contents | We investigate the electroweak phase transition in the real-singlet extension of the Standard Model at two-loop level, building upon existing one-loop studies. We calculate the effective potential in the high-temperature approximation and detail the required resummations at two-loop order. In typical strong-transition scenarios, we find deviations of order $20\% - 50\%$ from one-loop results in transition strength and critical temperature for both one- and two-step phase transitions. For extremely strong transitions, the discrepancy with one-loop predictions is even larger, presumably due to sizable scalar couplings in the tree-level potential. Along the way, we obtain a dimensionally-reduced effective theory applicable for non-perturbative lattice studies of the model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2103_07467 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Singlet-assisted electroweak phase transition at two loops Niemi, Lauri Schicho, Philipp Tenkanen, Tuomas V. I. High Energy Physics - Phenomenology We investigate the electroweak phase transition in the real-singlet extension of the Standard Model at two-loop level, building upon existing one-loop studies. We calculate the effective potential in the high-temperature approximation and detail the required resummations at two-loop order. In typical strong-transition scenarios, we find deviations of order $20\% - 50\%$ from one-loop results in transition strength and critical temperature for both one- and two-step phase transitions. For extremely strong transitions, the discrepancy with one-loop predictions is even larger, presumably due to sizable scalar couplings in the tree-level potential. Along the way, we obtain a dimensionally-reduced effective theory applicable for non-perturbative lattice studies of the model. |
| title | Singlet-assisted electroweak phase transition at two loops |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2103.07467 |