SUSY GUTs dark matter

Details SUSY GUTs dark matter SUSY GUTs dark matter

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nuphb.370..445l&link_type=abstract

Nuclear Physics B, Volume 370, Issue 2, p. 445-471.

Physics

Nuclear Physics

53

Scientific paper

We examine the cosmology of the lightest neutralino (χ) in a minimal SUSY GUT model. Our analysis incorporates the ensuing relations among the squark, slepton, and gaugino masses, and takes into account the recent experimental constraints on the parameter space. We consider a general neutralino state and compute its cosmological relic density resulting from pair annihilation into all allowed final states. Our analysis reveals a rich structure of resonances due to s-channel exchanges, and shows that some previous studies using pure neutralino states in ``nearly'' pure regions of parameter space give rather poor estimates for mχ < MW. We show that in the regions of parameter space favored by cosmology, the neutralino is a ``nearly'' pure bino state with mχ>~ 100 GeV. The SUSY GUTs mass relations then imply m~l >~ 200 GeV and mq,g >~ 600 GeV, all well within the reach of future hadron colliders.

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