The Supersymmetric Origin of Matter

The Minimal Supersymmetric extension of the Standard Model (MSSM) can provide the correct neutralino relic abundance and baryon number asymmetry of the universe. Both may be efficiently generated in the presence of CP violating phases, light charginos and neutralinos, and a light top squark. Due to...

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Bibliographic Details
Published inarXiv.org
Main Authors Balazs, C, Carena, M, Menon, A, Morrissey, D E, Wagner, C E M
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.01.2009
Subjects
Baryons
Cosmology
Decay rate
Dipole moments
Electric dipoles
Fermions
Gamma emission
Large Hadron Collider
Searching
Supersymmetry
Universe
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Summary:The Minimal Supersymmetric extension of the Standard Model (MSSM) can provide the correct neutralino relic abundance and baryon number asymmetry of the universe. Both may be efficiently generated in the presence of CP violating phases, light charginos and neutralinos, and a light top squark. Due to the coannihilation of the neutralino with the light stop, we find a large region of parameter space in which the neutralino relic density is consistent with WMAP and SDSS data. We perform a detailed study of the additional constraints induced when CP violating phases, consistent with the ones required for baryogenesis, are included. We explore the possible tests of this scenario from present and future electron Electric Dipole Moment (EDM) measurements, direct neutralino detection experiments, collider searches and the b -> s gamma decay rate. We find that the EDM constraints are quite severe and that electron EDM experiments, together with stop searches at the Tevatron and Higgs searches at the LHC, will provide a definite test of our scenario of electroweak baryogenesis in the next few years.
ISSN:2331-8422
DOI:10.48550/arxiv.0412264