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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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Autor principal: Cline, James M.
Lenguaje:eng
Publicado: 2017
Materias:
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.
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institution Organización Europea para la Investigación Nuclear
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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