A new aspect of the mass density of relic neutralinos - INSPIRE

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A new aspect of the mass density of relic neutralinos

M.M. Nojiri
(
- KEK, Tsukuba
)

Sep, 1990

5 pages

Published in:

Phys.Lett.B 261 (1991) 76-80

Published: 1991

DOI:

10.1016/0370-2693(91)91328-S

PDG: Other bounds on

{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}

from astrophysics and cosmology

Report number:

KEK-TH-263,
KEK-PREPRINT-90-101

reference search28 citations

Citations per year

Abstract: (Elsevier)

A cosmological constraint to the low energy minimal supersymmetric model, in which the lightest neutralino state is stable, is reconsidered. We show that the mass relation between squarks and sleptons imposed by the model can be essential in estimating the mass density of relic neutralinos. The mass relation leads to drastically different and smaller allowed regions of parameter space. If the lightest neutralino is gaugino-like and lighter than W, the condition Ω < 1 requires that the squark and gluino are nearly degenerate in mass.

sparticle: neutral particle
postulated particle: LSP
mass: density
density: mass
supersymmetry
cosmological model
postulated particle: squark
postulated particle: slepton
sparticle: mass spectrum
mass spectrum: sparticle

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