arXiv:hep-ph/0212379·v2·High Energy Physics — Phenomenology
Light Relic Neutralinos
A. Bottino🇮🇹 · N. Fornengo🇮🇹 · S. Scopel (U. of Torino and INFN - Torino)🇮🇹
Abstract
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.
Comments: 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