Mathematics – Logic
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nrdm.book.....d&link_type=abstract
The neutralino relic density in minimal N = 1 supergravity., by Drees, M.; Nojiri, M. M.. Deutsches Elektronen-Synchrotron (DESY
Mathematics
Logic
Scientific paper
The authors compute the cosmic relic (dark matter) density of the lightest supersymmetric particle (LSP) in the framework of minimal N = 1 supergravity models with radiative breaking of the electroweak gauge symmetry. They find that a cosmologically interesting relic density emerges naturally over wide regions of parameter space. However, the requirement that relic neutralinos do not overclose the universe does not lead to upper bounds on SUSY breaking parameters that are strictly valid for all combinations of parameters and of interest for existing or planned collider experiments. The authors also find that requiring the LSP to provide all dark matter predicted by inflationary models imposes a strict lower bound of 40 GeV on the common scalar mass m at the Planck scale, while the lightest sleptons would have to be heavier than 100 GeV. Fortunately, a large relic neutralino density does not exclude the possibility that charginos, neutralinos, gluinos and squarks are all within the reach of LEP200 and the Tevatron.
Drees Manuel
Nojiri Mihoko M.
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