Superlight neutralino as a dark matter particle candidate

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.503· OSTI ID:441055

Bednyakov, V A ^[1]; Klapdor-Kleingrothaus, H V ^[1]; Kovalenko, S G ^[1]

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1. Max-Planck-Institut fuer Kernphysik, Postfach 103980, D-69029, Heidelberg (Germany)

We address the question of how light the lightest supersymmetric particle neutralino can be to be a reliable cold dark matter (CDM) particle candidate. To this end we perform a combined analysis of the parameter space of the minimal supersymmetric standard model (MSSM) taking into account cosmological and accelerator constraints including those from the radiative b{r_arrow}s{gamma} decay. Appropriate grand unification (GUT) scenarios are considered. We find that the relaxation of gaugino mass unification is sufficient to obtain a phenomenologically and cosmologically viable solution of the MSSM with a neutralino as light as 3 GeV. We find good prospects for the direct detection of these superlight CDM neutralinos via elastic scattering off various nuclei in the forthcoming experiments with low-threshold DM detectors. In a certain sense, these experiments can probe the gaugino mass unification giving constraints on the possible GUT scenarios within the MSSM. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 441055
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 2 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELASTIC SCATTERING
GRAND UNIFIED THEORY
LIMITING VALUES
MASS
NEUTRINOS
NONLUMINOUS MATTER
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY