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Is electroweak baryogenesis dead?
Electroweak baryogenesis is severely challenged in its traditional settings: the Minimal Supersymmetric Standard Model, and in more general two Higgs doublet models. Fine tuning of parameters is required, or large couplings leading to a Landau pole at scales just above the new physics introduced. Th...
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Lenguaje: | eng |
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2017
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Acceso en línea: | https://dx.doi.org/10.1098/rsta.2017.0116 http://cds.cern.ch/record/2261858 |
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author | Cline, James M. |
author_facet | Cline, James M. |
author_sort | Cline, James M. |
collection | CERN |
description | Electroweak baryogenesis is severely challenged in its traditional settings: the Minimal Supersymmetric Standard Model, and in more general two Higgs doublet models. Fine tuning of parameters is required, or large couplings leading to a Landau pole at scales just above the new physics introduced. The situation is somewhat better in models with a singlet scalar coupling to the Higgs so as to give a strongly first order phase transition due to a tree-level barrier, but even in this case no UV complete models had been demonstrated to give successful baryogenesis. Here we point out some directions that overcome this limitation, by introducing a new source of CP violation in the couplings of the singlet field. A model of electroweak baryogenesis requiring no fine tuning and consistent to scales far above 1 TeV is demonstrated, in which dark matter plays the leading role in creating a CP asymmetry that is the source of the baryon asymmetry. |
id | cern-2261858 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2017 |
record_format | invenio |
spelling | cern-22618582021-09-16T11:32:05Zdoi:10.1098/rsta.2017.0116http://cds.cern.ch/record/2261858engCline, James M.Is electroweak baryogenesis dead?hep-phParticle Physics - PhenomenologyElectroweak baryogenesis is severely challenged in its traditional settings: the Minimal Supersymmetric Standard Model, and in more general two Higgs doublet models. Fine tuning of parameters is required, or large couplings leading to a Landau pole at scales just above the new physics introduced. The situation is somewhat better in models with a singlet scalar coupling to the Higgs so as to give a strongly first order phase transition due to a tree-level barrier, but even in this case no UV complete models had been demonstrated to give successful baryogenesis. Here we point out some directions that overcome this limitation, by introducing a new source of CP violation in the couplings of the singlet field. A model of electroweak baryogenesis requiring no fine tuning and consistent to scales far above 1 TeV is demonstrated, in which dark matter plays the leading role in creating a CP asymmetry that is the source of the baryon asymmetry.Electroweak baryogenesis is severely challenged in its traditional settings: the minimal supersymmetric standard model, and in more general two Higgs doublet models. Fine tuning of parameters is required, or large couplings leading to a Landau pole at scales just above the new physics introduced. The situation is somewhat better in models with a singlet scalar coupling to the Higgs so as to give a strongly first-order phase transition due to a tree-level barrier, but even in this case no UV complete models had been demonstrated to give successful baryogenesis. Here, we point out some directions that overcome this limitation, by introducing a new source of particle–antiparticle (CP) violation in the couplings of the singlet field. A model of electroweak baryogenesis requiring no fine tuning and consistent to scales far above 1 TeV is demonstrated, in which dark matter plays the leading role in creating a CP asymmetry that is the source of the baryon asymmetry.CERN-TH-2017-096arXiv:1704.08911oai:cds.cern.ch:22618582017-04-28 |
spellingShingle | hep-ph Particle Physics - Phenomenology Cline, James M. Is electroweak baryogenesis dead? |
title | Is electroweak baryogenesis dead? |
title_full | Is electroweak baryogenesis dead? |
title_fullStr | Is electroweak baryogenesis dead? |
title_full_unstemmed | Is electroweak baryogenesis dead? |
title_short | Is electroweak baryogenesis dead? |
title_sort | is electroweak baryogenesis dead? |
topic | hep-ph Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1098/rsta.2017.0116 http://cds.cern.ch/record/2261858 |
work_keys_str_mv | AT clinejamesm iselectroweakbaryogenesisdead |