Electroweak phase transition in a dark sector with CP violation
Abstract In this paper, we investigate the possibility of a strong first-order electroweak phase transition (SFOEWPT) in the model ‘CP in the Dark’. The Higgs sector of the model consists of two scalar doublets and one scalar singlet with a specific discrete symmetry. After spontaneous symmetry brea...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11612-w |
| _version_ | 1797789611437588480 |
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| author | Lisa Biermann Margarete Mühlleitner Jonas Müller |
| author_facet | Lisa Biermann Margarete Mühlleitner Jonas Müller |
| author_sort | Lisa Biermann |
| collection | DOAJ |
| description | Abstract In this paper, we investigate the possibility of a strong first-order electroweak phase transition (SFOEWPT) in the model ‘CP in the Dark’. The Higgs sector of the model consists of two scalar doublets and one scalar singlet with a specific discrete symmetry. After spontaneous symmetry breaking the model has a Standard-Model-like phenomenology and a hidden scalar sector with a viable Dark Matter candidate supplemented by explicit CP violation that solely occurs in the hidden sector. The model ‘CP in the Dark’ has been implemented in the C++ code BSMPT v2.3 which performs a global minimisation of the finite-temperature one-loop corrected effective potential and searches for SFOEWPTs. An SFOEWPT is found to be allowed in a broad range of the parameter space. Furthermore, there are parameter scenarios where spontaneous CP violation is generated at finite temperature. The in addition spontaneously broken $${\mathbb {Z}}_2$$ Z 2 symmetry then leads to mixing between the dark and the visible sector so that CP violation in the dark is promoted at finite temperature to the visible sector and thereby provides additional sources of CP violation that are not restricted by the electric dipole moment measurements at zero temperature. Thus, ‘CP in the Dark’ provides a promising candidate for the generation of the baryon asymmetry of the universe through electroweak baryogenesis. |
| first_indexed | 2024-03-13T01:53:08Z |
| format | Article |
| id | doaj.art-0c3cf5d2ccdb42baa1d98b3f265b9e10 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-03-13T01:53:08Z |
| publishDate | 2023-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-0c3cf5d2ccdb42baa1d98b3f265b9e102023-07-02T11:24:36ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-05-0183511410.1140/epjc/s10052-023-11612-wElectroweak phase transition in a dark sector with CP violationLisa Biermann0Margarete Mühlleitner1Jonas Müller2Institute for Theoretical Physics, Karlsruhe Institute of TechnologyInstitute for Theoretical Physics, Karlsruhe Institute of TechnologyInstitute for Theoretical Physics, Karlsruhe Institute of TechnologyAbstract In this paper, we investigate the possibility of a strong first-order electroweak phase transition (SFOEWPT) in the model ‘CP in the Dark’. The Higgs sector of the model consists of two scalar doublets and one scalar singlet with a specific discrete symmetry. After spontaneous symmetry breaking the model has a Standard-Model-like phenomenology and a hidden scalar sector with a viable Dark Matter candidate supplemented by explicit CP violation that solely occurs in the hidden sector. The model ‘CP in the Dark’ has been implemented in the C++ code BSMPT v2.3 which performs a global minimisation of the finite-temperature one-loop corrected effective potential and searches for SFOEWPTs. An SFOEWPT is found to be allowed in a broad range of the parameter space. Furthermore, there are parameter scenarios where spontaneous CP violation is generated at finite temperature. The in addition spontaneously broken $${\mathbb {Z}}_2$$ Z 2 symmetry then leads to mixing between the dark and the visible sector so that CP violation in the dark is promoted at finite temperature to the visible sector and thereby provides additional sources of CP violation that are not restricted by the electric dipole moment measurements at zero temperature. Thus, ‘CP in the Dark’ provides a promising candidate for the generation of the baryon asymmetry of the universe through electroweak baryogenesis.https://doi.org/10.1140/epjc/s10052-023-11612-w |
| spellingShingle | Lisa Biermann Margarete Mühlleitner Jonas Müller Electroweak phase transition in a dark sector with CP violation European Physical Journal C: Particles and Fields |
| title | Electroweak phase transition in a dark sector with CP violation |
| title_full | Electroweak phase transition in a dark sector with CP violation |
| title_fullStr | Electroweak phase transition in a dark sector with CP violation |
| title_full_unstemmed | Electroweak phase transition in a dark sector with CP violation |
| title_short | Electroweak phase transition in a dark sector with CP violation |
| title_sort | electroweak phase transition in a dark sector with cp violation |
| url | https://doi.org/10.1140/epjc/s10052-023-11612-w |
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