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Gravitino Dark Matter in the CMSSM
We consider the possibility that the gravitino might be the lightest supersymmetric particle (LSP) in the constrained minimal extension of the Standard Model (CMSSM). In this case, the next-to-lightest supersymmetric particle (NSP) would be unstable, with an abundance constrained by the concordance...
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.2004.03.021 http://cds.cern.ch/record/693409 |
_version_ | 1780902146209742848 |
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author | Ellis, Jonathan Richard Olive, Keith A Santoso, Y Spanos, V C |
author_facet | Ellis, Jonathan Richard Olive, Keith A Santoso, Y Spanos, V C |
author_sort | Ellis, Jonathan Richard |
collection | CERN |
description | We consider the possibility that the gravitino might be the lightest supersymmetric particle (LSP) in the constrained minimal extension of the Standard Model (CMSSM). In this case, the next-to-lightest supersymmetric particle (NSP) would be unstable, with an abundance constrained by the concordance between the observed light-element abundances and those calculated on the basis of the baryon-to-entropy ratio determined using CMB data. We modify and extend previous CMSSM relic neutralino calculations to evaluate the NSP density, also in the case that the NSP is the lighter stau, and show that the constraint from late NSP decays is respected only in a limited region of the CMSSM parameter space. In this region, gravitinos might constitute the dark matter. |
id | cern-693409 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2003 |
record_format | invenio |
spelling | cern-6934092019-09-30T06:29:59Zdoi:10.1016/j.physletb.2004.03.021http://cds.cern.ch/record/693409engEllis, Jonathan RichardOlive, Keith ASantoso, YSpanos, V CGravitino Dark Matter in the CMSSMParticle Physics - PhenomenologyWe consider the possibility that the gravitino might be the lightest supersymmetric particle (LSP) in the constrained minimal extension of the Standard Model (CMSSM). In this case, the next-to-lightest supersymmetric particle (NSP) would be unstable, with an abundance constrained by the concordance between the observed light-element abundances and those calculated on the basis of the baryon-to-entropy ratio determined using CMB data. We modify and extend previous CMSSM relic neutralino calculations to evaluate the NSP density, also in the case that the NSP is the lighter stau, and show that the constraint from late NSP decays is respected only in a limited region of the CMSSM parameter space. In this region, gravitinos might constitute the dark matter.hep-ph/0312262CERN-TH-2003-310FTPI-MINN-2003-37UMN-TH-2225oai:cds.cern.ch:6934092003-12-18 |
spellingShingle | Particle Physics - Phenomenology Ellis, Jonathan Richard Olive, Keith A Santoso, Y Spanos, V C Gravitino Dark Matter in the CMSSM |
title | Gravitino Dark Matter in the CMSSM |
title_full | Gravitino Dark Matter in the CMSSM |
title_fullStr | Gravitino Dark Matter in the CMSSM |
title_full_unstemmed | Gravitino Dark Matter in the CMSSM |
title_short | Gravitino Dark Matter in the CMSSM |
title_sort | gravitino dark matter in the cmssm |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/j.physletb.2004.03.021 http://cds.cern.ch/record/693409 |
work_keys_str_mv | AT ellisjonathanrichard gravitinodarkmatterinthecmssm AT olivekeitha gravitinodarkmatterinthecmssm AT santosoy gravitinodarkmatterinthecmssm AT spanosvc gravitinodarkmatterinthecmssm |