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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...

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Detalles Bibliográficos
Autores principales: Ellis, Jonathan Richard, Olive, Keith A, Santoso, Y, Spanos, V C
Lenguaje:eng
Publicado: 2003
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2004.03.021
http://cds.cern.ch/record/693409
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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
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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
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AT olivekeitha gravitinodarkmatterinthecmssm
AT santosoy gravitinodarkmatterinthecmssm
AT spanosvc gravitinodarkmatterinthecmssm