Scalar Dark Matter Candidates in Two Inert Higgs Doublet Model
  We study a two scalar inert doublet model (IDMS$_3$) which is stabilized by a $S_3$ symmetry. We consider two scenarios: i) two of the scalars in each charged sector are mass degenerated due to a residual $Z_2$ symmetry, ii) there is no mass degeneracy because of the introduction of soft terms that break the $Z_2$ symmetry. We show that both scenarios provide good dark matter candidates for some range of parameters. 
E. C. F. S. Fortes, A. C. B. Machado, J. Monta\~no, and V. Pleitez
hep-ph hep-ex