| Popis: |
We construct a generic model of Majorana fermion dark matter (DM). Starting with two Z2-odd Weyl spinor multiplets η1,2 ∼ (I,∓Y ) coupled to the standard model (SM) Higgs, eight additional Z2-odd Weyl spinor multiplets with (I± 1/2,±(Y ± 1/2)) are needed in general. It contains 13 parameters in total, five mass parameters and eight Yukawa couplings. The DM sector of the minimal extension of supersymmetric stand model (MSSM) is a special case of the model with (I,Y ) = (1/2,1/2). Therefore, this model can be viewed as an natural extension of the MSSM case. We consider the cases of MSSM-like (A), MSSM-like (B), and an extended case. We study the constraints from the observation of dark matter in relic density, the direct detection of LUX and XENON100 experiments, and the indirect detection of Fermi-LAT data. From these constraints we can find the allowed range for each coupling strength. Without considering the outlier samples, we find that the DM mass for finding H, B-, W and X-like DM particles should be greater than 445 GeV, 270 GeV, 1025 GeV, and 700 GeV respectively. |
