Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects
Abstract Simple scalar-singlet extensions of the Standard Model with a (spontaneously broken) Z 2 symmetry allow for a strong first order electroweak phase transition, as sought in order to realize electroweak baryogenesis. However they generically also lead to the emergence of phenomenologically pr...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-10-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP10(2022)019 |
| _version_ | 1811194979119267840 |
|---|---|
| author | Andrei Angelescu Florian Goertz Aika Tada |
| author_facet | Andrei Angelescu Florian Goertz Aika Tada |
| author_sort | Andrei Angelescu |
| collection | DOAJ |
| description | Abstract Simple scalar-singlet extensions of the Standard Model with a (spontaneously broken) Z 2 symmetry allow for a strong first order electroweak phase transition, as sought in order to realize electroweak baryogenesis. However they generically also lead to the emergence of phenomenologically problematic domain walls. Here we present a framework with a real scalar singlet that features a different thermal history that avoids this problem by never restoring the Z 2 symmetry in the early universe. This is accomplished by considering D > 4 operators that emerge on general grounds, understanding the model as the low energy tail of a more complete theory, like for example in composite Higgs scenarios. Sticking to the latter framework, we present a concrete SO(6)/SO(5) composite realization of the idea. To this end, we additionally provide a complete classification of the structure of the Higgs potential (and the Yukawa couplings) in SO(6)/SO(5) models with fermions in the 1, 6, 15 or 20′ of SO(6). |
| first_indexed | 2024-04-12T00:36:12Z |
| format | Article |
| id | doaj.art-68c1990da6624b36acdc22403eee49f9 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-12T00:36:12Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-68c1990da6624b36acdc22403eee49f92022-12-22T03:55:09ZengSpringerOpenJournal of High Energy Physics1029-84792022-10-0120221013110.1007/JHEP10(2022)019Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defectsAndrei Angelescu0Florian Goertz1Aika Tada2Max-Planck-Institut für KernphysikMax-Planck-Institut für KernphysikMax-Planck-Institut für KernphysikAbstract Simple scalar-singlet extensions of the Standard Model with a (spontaneously broken) Z 2 symmetry allow for a strong first order electroweak phase transition, as sought in order to realize electroweak baryogenesis. However they generically also lead to the emergence of phenomenologically problematic domain walls. Here we present a framework with a real scalar singlet that features a different thermal history that avoids this problem by never restoring the Z 2 symmetry in the early universe. This is accomplished by considering D > 4 operators that emerge on general grounds, understanding the model as the low energy tail of a more complete theory, like for example in composite Higgs scenarios. Sticking to the latter framework, we present a concrete SO(6)/SO(5) composite realization of the idea. To this end, we additionally provide a complete classification of the structure of the Higgs potential (and the Yukawa couplings) in SO(6)/SO(5) models with fermions in the 1, 6, 15 or 20′ of SO(6).https://doi.org/10.1007/JHEP10(2022)019Baryo-and LeptogenesisCompositenessPhase Transitions in the Early Universe |
| spellingShingle | Andrei Angelescu Florian Goertz Aika Tada Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects Journal of High Energy Physics Baryo-and Leptogenesis Compositeness Phase Transitions in the Early Universe |
| title | Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects |
| title_full | Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects |
| title_fullStr | Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects |
| title_full_unstemmed | Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects |
| title_short | Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects |
| title_sort | z2 non restoration and composite higgs singlet assisted baryogenesis w o topological defects |
| topic | Baryo-and Leptogenesis Compositeness Phase Transitions in the Early Universe |
| url | https://doi.org/10.1007/JHEP10(2022)019 |
| work_keys_str_mv | AT andreiangelescu z2nonrestorationandcompositehiggssingletassistedbaryogenesiswotopologicaldefects AT floriangoertz z2nonrestorationandcompositehiggssingletassistedbaryogenesiswotopologicaldefects AT aikatada z2nonrestorationandcompositehiggssingletassistedbaryogenesiswotopologicaldefects |