Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field
We compute the baryon asymmetry generated from Cold Electroweak Baryogenesis, when a dynamical Beyond-the-Standard-Model scalar singlet field triggers the spinodal transition. Using a simple potential for this additional field, we match the speed of the quench to earlier simulations with a "by-...
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| Format: | Article |
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Springer
2018
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| Online Access: | https://eprints.nottingham.ac.uk/49435/ |
| _version_ | 1848797995614601216 |
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| author | Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders |
| author_facet | Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders |
| author_sort | Mou, Zong-Gang |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We compute the baryon asymmetry generated from Cold Electroweak Baryogenesis, when a dynamical Beyond-the-Standard-Model scalar singlet field triggers the spinodal transition. Using a simple potential for this additional field, we match the speed of the quench to earlier simulations with a "by-hand" mass flip. We find that for the parameter subspace most similar to a by-hand transition, the final baryon asymmetry shows a similar dependence on quench time and is of the same magnitude. For more general parameter choices the Higgs-singlet dynamics can be very complicated, resulting in an enhancement of the final baryon asymmetry. Our results validate and generalise results of simulations in the literature and open up the Cold Electroweak Baryogenesis scenario to further model building. |
| first_indexed | 2025-11-14T20:12:44Z |
| format | Article |
| id | nottingham-49435 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:12:44Z |
| publishDate | 2018 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-494352020-05-04T19:27:53Z https://eprints.nottingham.ac.uk/49435/ Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders We compute the baryon asymmetry generated from Cold Electroweak Baryogenesis, when a dynamical Beyond-the-Standard-Model scalar singlet field triggers the spinodal transition. Using a simple potential for this additional field, we match the speed of the quench to earlier simulations with a "by-hand" mass flip. We find that for the parameter subspace most similar to a by-hand transition, the final baryon asymmetry shows a similar dependence on quench time and is of the same magnitude. For more general parameter choices the Higgs-singlet dynamics can be very complicated, resulting in an enhancement of the final baryon asymmetry. Our results validate and generalise results of simulations in the literature and open up the Cold Electroweak Baryogenesis scenario to further model building. Springer 2018-01-22 Article PeerReviewed Mou, Zong-Gang, Saffin, Paul M. and Tranberg, Anders (2018) Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field. Journal of High Energy Physics, 2018 (1). 103/1-103/22. ISSN 1029-8479 CP violation; Cosmology of theories beyond the SM; Lattice quantum field theory; Nonperturbative effects https://doi.org/10.1007/JHEP01(2018)103 doi:10.1007/JHEP01(2018)103 doi:10.1007/JHEP01(2018)103 |
| spellingShingle | CP violation; Cosmology of theories beyond the SM; Lattice quantum field theory; Nonperturbative effects Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field |
| title | Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field |
| title_full | Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field |
| title_fullStr | Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field |
| title_full_unstemmed | Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field |
| title_short | Simulations of Cold Electroweak Baryogenesis: quench from portal coupling to new singlet field |
| title_sort | simulations of cold electroweak baryogenesis: quench from portal coupling to new singlet field |
| topic | CP violation; Cosmology of theories beyond the SM; Lattice quantum field theory; Nonperturbative effects |
| url | https://eprints.nottingham.ac.uk/49435/ https://eprints.nottingham.ac.uk/49435/ https://eprints.nottingham.ac.uk/49435/ |