Work

Gravitino dark matter in the CMSSM

Year: 2004

Type: article

Abstract: 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.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2004.03.021

Authors: John Ellis, Keith A. Olive, Yudi Santoso, Vassilis C. Spanos

Institutions: European Organization for Nuclear Research, University of Minnesota

Language: English

Topic: Dark Matter and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid:

Funder: U.S. Department of Energy