Minimal Dirac seesaw accompanied by Dirac fermionic dark matter

Pei-Hong Gu

The $SU(3{)}_c^{}\times SU(2{)}_L^{}\times U(1{)}_Y^{}$ standard model is extended by a $U(1{)}_{B-L}^{}$ gauge symmetry with four right-handed neutrinos. Because of their Yukawa coupling…