Cosmological evolution of scalar fields and gravitino dark matter in gauge mediation at low reheating temperatures

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2010/02/003· OSTI ID:22272969

Ferrantelli, Andrea ^[1]; McDonald, John ^[2]

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1. University of Helsinki and Helsinki Institute of Physics, P.O.Box 64, FIN-00014 University of Helsinki (Finland)
2. Cosmology and Astroparticle Physics Group, University of Lancaster, Lancaster LA1 4YB (United Kingdom)

We consider the dynamics of the supersymmetry-breaking scalar field and the production of dark matter gravitinos via its decay in a gauge-mediated supersymmetry breaking model with metastable vacuum. We find that the scalar field amplitude and gravitino density are extremely sensitive to the parameters of the hidden sector. For the case of an O'Raifeartaigh sector, we show that the observed dark matter density can be explained by gravitinos even for low reheating temperatures T{sub R}∼<10GeV. Such low reheating temperatures may be implied by detection of the NLSP at the LHC if its thermal freeze-out density is in conflict with BBN.

• OSTI ID: 22272969
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2010, Issue 02; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMOLOGICAL MODELS
COSMOLOGY
DENSITY
GRAVITONS
NONLUMINOUS MATTER
PARTICLE PRODUCTION
SCALAR FIELDS
SUPERSYMMETRY
SYMMETRY BREAKING