Neutralino Dark Matter in BMSSM Effective Theory
2009 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, no 08Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
IOP Publishing , 2009. no 08
supersymmetry and cosmology, dark matter theory
Research subject Physics
IdentifiersURN: urn:nbn:se:su:diva-33940DOI: 10.1088/1475-7516/2009/08/035ISI: 000270036800035OAI: oai:DiVA.org:su-33940DiVA: diva2:283848