# EPS HEP 2015

22-29 July 2015
Europe/Vienna timezone

## Study of Majorana Fermion Dark Matter

Jul 24, 2015, 4:30 PM
15m
HS33

### HS33

talk Astroparticle Physics, Cosmology, Gravitation

### Speakers

Chun-Khiang Chua Gwo-Guang Wong (Chung Yuan Christian University)

### Description

We construct a generic model of Majorana fermion dark matter (DM). Starting with two Weyl spinor multiplets $\eta_{1,2}$ having quantum numbers $(I,\mp Y)$ coupled to the standard model (SM) Higgs, six additional Weyl spinor multiplets with $(I\pm 1/2, \pm(Y\pm 1/2))$ are needed in general. It has 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 three cases: MSSM-like, reduced, and extended cases. We study the constraints from the observation of dark matter in relic density, the direct search experiments of XENON, LUX and PICO , and the indirect search experiment of Fermi-LAT. From the constraints we find the allowed range of coupling strength and the distribution of main ingredient which compose a DM particle in mass parameter space. These results are compared with each other.

### Primary author

Gwo-Guang Wong (Chung Yuan Christian University)