
arXiv: hep-ph/0212379
handle: 2318/1653994
The relic abundance and the scalar cross-section off nucleon for light neutralinos (of mass below about 45 GeV) are evaluated in an effective MSSM model without GUT-inspired relations among gaugino masses. It is shown that these neutralinos may provide a sizeable contribution to the matter density in the Universe and produce measurable effects in WIMP direct detection experiments. These properties are elucidated in terms of simple analytical arguments.
11 pages, 4 figures, typeset with ReVTeX4. The paper may also be found at http://www.to.infn.it/~fornengo/papers/light.ps.gz Some comments and references added
High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), Astroparticle Physics, High Energy Physics - Phenomenology (hep-ph), Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics, High Energy Physics - Experiment
High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), Astroparticle Physics, High Energy Physics - Phenomenology (hep-ph), Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics, High Energy Physics - Experiment
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