Simple singlet fermionic dark-matter model under the new results of dark matter search

The simple singlet fermionic dark matter (DM) extension of standard model (SM) is studied in this paper, we study this model more completely, we consider that the dark matter mass in a much wide range, and we have studied the influence of mixing angle θ in this model. We also update the value of f_T, from the recent lattice simulation to give a more accurate spin-independent elastic dark matter-nucleon scattering cross-section. We find that WMAP and CDMS, XENON experiments together give a stringent constraint to this model, the coupling constant in the dark sector must be much small in case of that mass of DM is light, when DM is heavy light Higgs may be excluded. The Higgs decay is also studied in some benchmark points.