PT Journal
AU Centelles Chulia, S
   Srivastava, R
   Valle, JWF
TI Seesaw Dirac neutrino mass through dimension-six operators
SO Physical Review D
JI Phys. Rev. D
PY 2018
BP 035009
EP 18pp
VL 98
IS 3
DI 10.1103/PhysRevD.98.035009
LA English
AB In this paper, a follow-up of [S. C. Chulia, R. Srivastava, and J. W. F. Valle, Phys. Lett. B 781, 122 (2018)], we describe the many pathways to generate Dirac neutrino mass through dimension-six operators. By using only the standard model Higgs doublet in the external legs, one gets a unique operator 1/Lambda(2) (L) over bar (Phi) over bar (Phi) over bar Phi nu(R). In contrast, the presence of new scalars implies new possible field contractions, which greatly increase the number of possibilities. Here, we study in detail the simplest ones, involving SU(2)(L) singlets, doublets, and triplets. The extra symmetries needed to ensure the Dirac nature of neutrinos can also be responsible for stabilizing dark matter.
ER