Neutralino dark matter in BMSSM effective theory

Journal Article · Sat Aug 01 04:00:00 EDT 2009 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2009/08/035· OSTI ID:22273243

Berg, Marcus; Edsjö, Joakim; Lundström, Erik; Sjörs, Stefan ^[1]; Gondolo, Paolo ^[2]

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1. Oskar Klein Center for Cosmoparticle Physics and Cosmology, Particle Astrophysics and String Theory (CoPS), Department of Physics, Stockholm University, Albanova, SE-106 91 Stockholm (Sweden)
2. Department of Physics and Astronomy, University of Utah, 115 South 1400 East, Salt Lake City, UT 84112 (United States)

We study thermal neutralino dark matter in an effective field theory extension of the MSSM, called ''Beyond the MSSM'' (BMSSM) in Dine, Seiberg and Thomas (2007). In this class of effective field theories, the field content of the MSSM is unchanged, but the little hierarchy problem is alleviated by allowing small corrections to the Higgs/higgsino part of the Lagrangian. We perform parameter scans and compute the dark matter relic density. The light higgsino LSP scenario is modified the most; we find new regions of parameter space compared to the standard MSSM. This involves interesting interplay between the WMAP dark matter bounds and the LEP chargino bound. We also find some changes for gaugino LSPs, partly due to annihilation through a Higgs resonance, and partly due to coannihilation with light top squarks in models that are ruled in by the new effective terms.

• OSTI ID: 22273243
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 08 Vol. 2009; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ANNIHILATION
ASTROPHYSICS
COMPARATIVE EVALUATIONS
CORRECTIONS
COSMOLOGY
FIELD THEORIES
HIGGS BOSONS
HIGGS MODEL
LAGRANGIAN FUNCTION
NONLUMINOUS MATTER
PARTICLE IDENTIFICATION
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
VISIBLE RADIATION