Light $Z^{\prime }$ and Dirac fermion dark matter in the $B-L$ model

Newton Nath, Nobuchika Okada, Satomi Okada +2

We consider a $U(1{)}_{B-L}$ model with a $Z^{\prime }$ portal Dirac fermion dark matter (DM) $\chi$ of low mass which couples very weakly to the $B-L$ gauge boson $Z^{\prime }$. An arbitra…