Light dark matter in the singlet-extended MSSM
  We discuss the possibility of light dark matter in a general singlet
extension of the MSSM. Singlino LSPs with masses of a few GeV can explain the
signals reported by the CRESST, CoGeNT and possibly also DAMA experiments. The
interactions between singlinos and nuclei are mediated by a scalar whose
properties coincide with those of the SM Higgs up to two crucial differences:
the scalar has a mass of a few GeV and its interaction strengths are suppressed
by a universal factor. We show that such a scalar can be consistent with
current experimental constraints, and that annihilation of singlinos into such
scalars in the early universe can naturally lead to a relic abundance
consistent with the observed density of cold dark matter.
