  In supersymmetric models whose gauge group includes an additional U(1) factor
at the TeV scale, broken by the VEV of an standard model singlet S, the
parameter space can accommodate a very light neutralino not ruled out
experimentally. This higgsino-like fermion, stable if R-parity is conserved,
can make a good cold dark matter candidate. We examine the thermal relic
density of this particle and discuss the prospects for its direct detection if
it forms part of our galactic halo.

High Energy Physics - Phenomenology