Shinning Light on Sterile Neutrino Portal Dark Matter from Cosmology and Collider

Ang Liu, Feng-Lan Shao, Zhi-Long Han +2

Provided the dark sector consisted of a dark scalar $\varphi$ and a dark fermion $\chi$ under an exact $Z_2$ symmetry, the sterile neutrino $N$ can act as the messenger between the dark sec…