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Against Tachyophobia
We examine the possible extension of the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), as expressed via the renormalization-group equations in terms of universal soft supersymmetry-breaking terms at the unification scale, to include tachyonic input scalar mass...
Autores principales: | , , , , |
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Lenguaje: | eng |
Publicado: |
2008
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.78.075006 http://cds.cern.ch/record/1111313 |
_version_ | 1780914295272374272 |
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author | Ellis, Jonathan Richard Giedt, Joel Lebedev, Oleg Olive, Keith Srednicki, Mark |
author_facet | Ellis, Jonathan Richard Giedt, Joel Lebedev, Oleg Olive, Keith Srednicki, Mark |
author_sort | Ellis, Jonathan Richard |
collection | CERN |
description | We examine the possible extension of the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), as expressed via the renormalization-group equations in terms of universal soft supersymmetry-breaking terms at the unification scale, to include tachyonic input scalar masses. Many models with negative masses-squared for scalars at the unification scale may be viable because the small sizes of the masses-squared allow them to change signs during the renormalization-group evolution to the electroweak scale. However, in many cases, there is, in addition to the electroweak vacuum, a much deeper high-scale vacuum located along some F- and D-flat direction in the effective potential for the MSSM. We perform a numerical search for such vacua in both the CMSSM and the NUHM. We discuss the circumstances under which the existence of such a deep charge- and color-breaking vacuum is consistent with standard cosmology. A crucial role is played by the inflation--induced scalar masses, whereas thermal effects are often irrelevant. |
id | cern-1111313 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2008 |
record_format | invenio |
spelling | cern-11113132019-09-30T06:29:59Zdoi:10.1103/PhysRevD.78.075006http://cds.cern.ch/record/1111313engEllis, Jonathan RichardGiedt, JoelLebedev, OlegOlive, KeithSrednicki, MarkAgainst TachyophobiaParticle Physics - PhenomenologyWe examine the possible extension of the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), as expressed via the renormalization-group equations in terms of universal soft supersymmetry-breaking terms at the unification scale, to include tachyonic input scalar masses. Many models with negative masses-squared for scalars at the unification scale may be viable because the small sizes of the masses-squared allow them to change signs during the renormalization-group evolution to the electroweak scale. However, in many cases, there is, in addition to the electroweak vacuum, a much deeper high-scale vacuum located along some F- and D-flat direction in the effective potential for the MSSM. We perform a numerical search for such vacua in both the CMSSM and the NUHM. We discuss the circumstances under which the existence of such a deep charge- and color-breaking vacuum is consistent with standard cosmology. A crucial role is played by the inflation--induced scalar masses, whereas thermal effects are often irrelevant.arXiv:0806.3648CERN-PH-TH-2008-135oai:cds.cern.ch:11113132008-06-24 |
spellingShingle | Particle Physics - Phenomenology Ellis, Jonathan Richard Giedt, Joel Lebedev, Oleg Olive, Keith Srednicki, Mark Against Tachyophobia |
title | Against Tachyophobia |
title_full | Against Tachyophobia |
title_fullStr | Against Tachyophobia |
title_full_unstemmed | Against Tachyophobia |
title_short | Against Tachyophobia |
title_sort | against tachyophobia |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1103/PhysRevD.78.075006 http://cds.cern.ch/record/1111313 |
work_keys_str_mv | AT ellisjonathanrichard againsttachyophobia AT giedtjoel againsttachyophobia AT lebedevoleg againsttachyophobia AT olivekeith againsttachyophobia AT srednickimark againsttachyophobia |