Constraints on Two-Component Dark Matter

Abstract

We study 'Higgs Portal' 2-component Dark Matter scenario with two interacting cold Dark Matter (DM) candidates: a neutral scalar singlet ($\phi$) and a neutral Majorana fermion ($\nu$). The relic abundance of $\phi$ and $\nu$ is found assuming thermal DM production and solving the Boltzmann equations. We scan over the parameter space of the model to determine regions consistent with the WMAP data for DM relic abundance and the XENON100 direct detection limits for the DM-nucleus cross section.

Comments: 7 pages, 3 figures, contribution to the proceedings of the conference "Matter To The Deepest, Recent Developments In Physics Of Fundamental Interactions, XXXVII International Conference of Theoretical Physics" (1-6 September, Ustron, Poland), v2: typo in authors name corrected