The existence of cold dark matter is a major piece of evidence that there are new physics beyond the Standard Model.

My recent work:

Models and signals of a GeV dark sector mediating dark matter self-interaction.

1. M. Reece and L. T. Wang, ``Searching for the light dark gauge boson in GeV-scale experiments,''
  JHEP 0907, 051 (2009),  [arXiv:0904.1743 [hep-ph]].

2. C. Cheung, J. T. Ruderman, L. T. Wang and I. Yavin, ``Kinetic Mixing as the Origin of Light Dark Scales,''
  arXiv:0902.3246 [hep-ph].

3. M. Baumgart, C. Cheung, J. T. Ruderman, L. T. Wang and I. Yavin, ``Non-Abelian Dark Sectors and Their Collider Signatures,''
  JHEP 0904, 014 (2009), [arXiv:0901.0283 [hep-ph]].

Here is a web page which has information on searching for GeV dark sector.

Constraints on the inelastic dark matter scenario:

1. S. Nussinov, L. T. Wang and I. Yavin, ``Capture of Inelastic Dark Matter in the Sun,'' arXiv:0905.1333 [hep-ph].