Electroweak symmetry restoration in the N2HDM via domain walls
Abstract Domain walls are a type of topological defect that can arise in the early universe after the spontaneous breaking of a discrete symmetry. They can form in several beyond the Standard Model theories with an extended Higgs sector such as the Next-to-Two-Higgs-Doublet model (N2HDM). In this wo...
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SpringerOpen
2025-06-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP06(2025)072 |
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| author | Mohamed Younes Sassi Gudrid Moortgat-Pick |
| author_facet | Mohamed Younes Sassi Gudrid Moortgat-Pick |
| author_sort | Mohamed Younes Sassi |
| collection | DOAJ |
| description | Abstract Domain walls are a type of topological defect that can arise in the early universe after the spontaneous breaking of a discrete symmetry. They can form in several beyond the Standard Model theories with an extended Higgs sector such as the Next-to-Two-Higgs-Doublet model (N2HDM). In this work, we discuss the domain wall solution related to the singlet scalar of the N2HDM and demonstrate the possibility of restoring the electroweak symmetry inside and in the vicinity of the domain wall. Such symmetry restoration can have profound implications on early universe cosmology as the weak sphaleron rate inside the domain wall would, in principle, be unsuppressed compared to the rate outside the wall. We also discuss the possibility of generating CP-violating field configurations and hypermagnetic fields localized inside the domain wall. Our work is a first step towards the realization of electroweak baryogenesis mediated by domain walls in the N2HDM. |
| format | Article |
| id | doaj-art-bc9420f2cfd2484ea3e6481a405bf11f |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-bc9420f2cfd2484ea3e6481a405bf11f2025-08-20T03:42:45ZengSpringerOpenJournal of High Energy Physics1029-84792025-06-012025614510.1007/JHEP06(2025)072Electroweak symmetry restoration in the N2HDM via domain wallsMohamed Younes Sassi0Gudrid Moortgat-Pick1II. Institut für Theoretische Physik, University of HamburgII. Institut für Theoretische Physik, University of HamburgAbstract Domain walls are a type of topological defect that can arise in the early universe after the spontaneous breaking of a discrete symmetry. They can form in several beyond the Standard Model theories with an extended Higgs sector such as the Next-to-Two-Higgs-Doublet model (N2HDM). In this work, we discuss the domain wall solution related to the singlet scalar of the N2HDM and demonstrate the possibility of restoring the electroweak symmetry inside and in the vicinity of the domain wall. Such symmetry restoration can have profound implications on early universe cosmology as the weak sphaleron rate inside the domain wall would, in principle, be unsuppressed compared to the rate outside the wall. We also discuss the possibility of generating CP-violating field configurations and hypermagnetic fields localized inside the domain wall. Our work is a first step towards the realization of electroweak baryogenesis mediated by domain walls in the N2HDM.https://doi.org/10.1007/JHEP06(2025)072Baryo-and LeptogenesisEarly Universe Particle PhysicsMulti-Higgs ModelsPhase Transitions in the Early Universe |
| spellingShingle | Mohamed Younes Sassi Gudrid Moortgat-Pick Electroweak symmetry restoration in the N2HDM via domain walls Journal of High Energy Physics Baryo-and Leptogenesis Early Universe Particle Physics Multi-Higgs Models Phase Transitions in the Early Universe |
| title | Electroweak symmetry restoration in the N2HDM via domain walls |
| title_full | Electroweak symmetry restoration in the N2HDM via domain walls |
| title_fullStr | Electroweak symmetry restoration in the N2HDM via domain walls |
| title_full_unstemmed | Electroweak symmetry restoration in the N2HDM via domain walls |
| title_short | Electroweak symmetry restoration in the N2HDM via domain walls |
| title_sort | electroweak symmetry restoration in the n2hdm via domain walls |
| topic | Baryo-and Leptogenesis Early Universe Particle Physics Multi-Higgs Models Phase Transitions in the Early Universe |
| url | https://doi.org/10.1007/JHEP06(2025)072 |
| work_keys_str_mv | AT mohamedyounessassi electroweaksymmetryrestorationinthen2hdmviadomainwalls AT gudridmoortgatpick electroweaksymmetryrestorationinthen2hdmviadomainwalls |