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Phenomenological Constraints on Patterns of Supersymmetry Breaking
Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A_0 and B_0 at the input scale. In such models, the value of tan beta can be calculated as a function of the scalar masses m_0 and the gaugino masses m_{1/2}, which w...
Autores principales: | , , , |
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Lenguaje: | eng |
Publicado: |
2003
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2003.08.056 http://cds.cern.ch/record/617702 |
_version_ | 1780900310409019392 |
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author | Ellis, John R. Olive, Keith A. Santoso, Yudi Spanos, Vassilis C. |
author_facet | Ellis, John R. Olive, Keith A. Santoso, Yudi Spanos, Vassilis C. |
author_sort | Ellis, John R. |
collection | CERN |
description | Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A_0 and B_0 at the input scale. In such models, the value of tan beta can be calculated as a function of the scalar masses m_0 and the gaugino masses m_{1/2}, which we assume to be universal. The experimental constraints on sparticle and Higgs masses, b to s gamma decay and the cold dark matter density Omega_{CDM} h^2 can then be used to constrain tan beta in such specific models of supersymmetry breaking. In the simplest Polonyi model with A_0 = (3 - sqrt{3})m_0 = B_0 + m_0, we find 11 < tan beta < 20 (tan beta ~ 4.15) for mu > 0 (mu < 0). We also discuss other models with A_0 = B_0 + m_0, finding that only the range -1.9 < A_0/m_0 < 2.5 is allowed for mu > 0, and the range 1.25 < A_0/m_0 < 4.8 for mu < 0. In these models, we find no solutions in the rapid-annihilation `funnels' or in the `focus-point' region. We also discuss the allowed range of tan beta in the no-scale model with A_0 = B_0 = 0. In all these models, most of the allowed regions are in the chi - stau_1 coannihilation `tail'. |
id | cern-617702 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2003 |
record_format | invenio |
spelling | cern-6177022023-03-14T19:59:53Zdoi:10.1016/j.physletb.2003.08.056http://cds.cern.ch/record/617702engEllis, John R.Olive, Keith A.Santoso, YudiSpanos, Vassilis C.Phenomenological Constraints on Patterns of Supersymmetry BreakingParticle Physics - PhenomenologySpecific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A_0 and B_0 at the input scale. In such models, the value of tan beta can be calculated as a function of the scalar masses m_0 and the gaugino masses m_{1/2}, which we assume to be universal. The experimental constraints on sparticle and Higgs masses, b to s gamma decay and the cold dark matter density Omega_{CDM} h^2 can then be used to constrain tan beta in such specific models of supersymmetry breaking. In the simplest Polonyi model with A_0 = (3 - sqrt{3})m_0 = B_0 + m_0, we find 11 < tan beta < 20 (tan beta ~ 4.15) for mu > 0 (mu < 0). We also discuss other models with A_0 = B_0 + m_0, finding that only the range -1.9 < A_0/m_0 < 2.5 is allowed for mu > 0, and the range 1.25 < A_0/m_0 < 4.8 for mu < 0. In these models, we find no solutions in the rapid-annihilation `funnels' or in the `focus-point' region. We also discuss the allowed range of tan beta in the no-scale model with A_0 = B_0 = 0. In all these models, most of the allowed regions are in the chi - stau_1 coannihilation `tail'.Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A 0 and B 0 at the input scale. In such models, the value of tan β can be calculated as a function of the scalar masses m 0 and the gaugino masses m 1/2 , which we assume to be universal. The experimental constraints on sparticle and Higgs masses, b → sγ decay and the cold dark matter density Ω CDM h 2 can then be used to constrain tan β in such specific models of supersymmetry breaking. In the simplest Polonyi model with A 0 =(3− 3 )m 0 =B 0 +m 0 , we find 11≲tan β ≲20 (tan β ≃4.15) for μ >0 ( μ <0). We also discuss other models with A 0 = B 0 + m 0 , finding that only the range −1.9≲ A 0 / m 0 ≲2.5 is allowed for μ >0, and the range 1.25≲ A 0 / m 0 ≲4.8 for μ <0. In these models, we find no solutions in the rapid-annihilation ‘funnels’ or in the ‘focus-point’ region. We also discuss the allowed range of tan β in the no-scale model with A 0 = B 0 =0. In all these models, most of the allowed regions are in the χ− τ ̃ 1 coannihilation ‘tail’.Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A_0 and B_0 at the input scale. In such models, the value of tan beta can be calculated as a function of the scalar masses m_0 and the gaugino masses m_{1/2}, which we assume to be universal. The experimental constraints on sparticle and Higgs masses, b to s gamma decay and the cold dark matter density Omega_{CDM} h^2 can then be used to constrain tan beta in such specific models of supersymmetry breaking. In the simplest Polonyi model with A_0 = (3 - sqrt{3})m_0 = B_0 + m_0, we find 11 < tan beta < 20 (tan beta ~ 4.15) for mu > 0 (mu < 0). We also discuss other models with A_0 = B_0 + m_0, finding that only the range -1.9 < A_0/m_0 < 2.5 is allowed for mu > 0, and the range 1.25 < A_0/m_0 < 4.8 for mu < 0. In these models, we find no solutions in the rapid-annihilation `funnels' or in the `focus-point' region. We also discuss the allowed range of tan beta in the no-scale model with A_0 = B_0 = 0. In all these models, most of the allowed regions are in the chi - stau_1 coannihilation `tail'.hep-ph/0305212CERN-TH-2003-107UMN-TH-2201-03FTPI-MINN-03-12CERN-TH-2003-107FTPI-MINN-2003-12UMN-TH-2201oai:cds.cern.ch:6177022003-05-20 |
spellingShingle | Particle Physics - Phenomenology Ellis, John R. Olive, Keith A. Santoso, Yudi Spanos, Vassilis C. Phenomenological Constraints on Patterns of Supersymmetry Breaking |
title | Phenomenological Constraints on Patterns of Supersymmetry Breaking |
title_full | Phenomenological Constraints on Patterns of Supersymmetry Breaking |
title_fullStr | Phenomenological Constraints on Patterns of Supersymmetry Breaking |
title_full_unstemmed | Phenomenological Constraints on Patterns of Supersymmetry Breaking |
title_short | Phenomenological Constraints on Patterns of Supersymmetry Breaking |
title_sort | phenomenological constraints on patterns of supersymmetry breaking |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/j.physletb.2003.08.056 http://cds.cern.ch/record/617702 |
work_keys_str_mv | AT ellisjohnr phenomenologicalconstraintsonpatternsofsupersymmetrybreaking AT olivekeitha phenomenologicalconstraintsonpatternsofsupersymmetrybreaking AT santosoyudi phenomenologicalconstraintsonpatternsofsupersymmetrybreaking AT spanosvassilisc phenomenologicalconstraintsonpatternsofsupersymmetrybreaking |