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Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects
We study the decoupling of the first two squark and slepton families in order to lower the flavour changing neutral current effects. Models with inverse sfermion mass hierarchy based upon gauged U(1) flavour symmetries provide a natural framework where decoupling can be implemented. Decoupling requi...
Autores principales: | , |
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Lenguaje: | eng |
Publicado: |
2000
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Acceso en línea: | https://dx.doi.org/10.1088/1126-6708/2000/07/048 http://cds.cern.ch/record/434802 |
_version_ | 1780895376704798720 |
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author | Brax, Ph. Savoy, Carlos A. |
author_facet | Brax, Ph. Savoy, Carlos A. |
author_sort | Brax, Ph. |
collection | CERN |
description | We study the decoupling of the first two squark and slepton families in order to lower the flavour changing neutral current effects. Models with inverse sfermion mass hierarchy based upon gauged U(1) flavour symmetries provide a natural framework where decoupling can be implemented. Decoupling requires a large gap between the Fermi scale and the supersymmetry breaking scale. Maintaining the electroweak symmetry breaking at the Fermi scale requires some fine-tuning that we investigate by solving the two-loop renormalization group equations. We show that the two-loop effects are governed by the anomaly compensated by the Green-Schwarz mechanism and can be determined from the quark and lepton masses. The electroweak breaking constraints lead to a small $\mu$ scenario where the LSP is Higgsino-like. |
id | cern-434802 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2000 |
record_format | invenio |
spelling | cern-4348022023-03-14T17:59:51Zdoi:10.1088/1126-6708/2000/07/048http://cds.cern.ch/record/434802engBrax, Ph.Savoy, Carlos A.Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC EffectsParticle Physics - PhenomenologyWe study the decoupling of the first two squark and slepton families in order to lower the flavour changing neutral current effects. Models with inverse sfermion mass hierarchy based upon gauged U(1) flavour symmetries provide a natural framework where decoupling can be implemented. Decoupling requires a large gap between the Fermi scale and the supersymmetry breaking scale. Maintaining the electroweak symmetry breaking at the Fermi scale requires some fine-tuning that we investigate by solving the two-loop renormalization group equations. We show that the two-loop effects are governed by the anomaly compensated by the Green-Schwarz mechanism and can be determined from the quark and lepton masses. The electroweak breaking constraints lead to a small $\mu$ scenario where the LSP is Higgsino-like.We study the decoupling of the first two squark and slepton families in order to lower the flavour changing neutral current effects. Models with inverse sfermion mass hierarchy based upon gauged U(1) flavour symmetries provide a natural framework where decoupling can be implemented. Decoupling requires a large gap between the Fermi scale and the supersymmetry breaking scale. Maintaining the electroweak symmetry breaking at the Fermi scale requires some fine-tuning that we investigate by solving the two-loop renormalization group equations. We show that the two-loop effects are governed by the anomaly compensated by the Green-Schwarz mechanism and can be determined from the quark and lepton masses. The electroweak breaking constraints lead to a small $\mu$ scenario where the LSP is Higgsino-like.hep-ph/0004133CERN-TH-2000-111SACLAY-SPH-T-00-46CERN-TH-2000-111SACLAY-SPHT-T-2000-046oai:cds.cern.ch:4348022000-04-14 |
spellingShingle | Particle Physics - Phenomenology Brax, Ph. Savoy, Carlos A. Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects |
title | Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects |
title_full | Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects |
title_fullStr | Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects |
title_full_unstemmed | Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects |
title_short | Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects |
title_sort | models with inverse sfermion mass hierarchy and decoupling of the susy fcnc effects |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1088/1126-6708/2000/07/048 http://cds.cern.ch/record/434802 |
work_keys_str_mv | AT braxph modelswithinversesfermionmasshierarchyanddecouplingofthesusyfcnceffects AT savoycarlosa modelswithinversesfermionmasshierarchyanddecouplingofthesusyfcnceffects |