Programme

P.22 -- Poster, VCTP-49

Date: Wednesday, 31 July 2024

Time: 08:30 - 10:00

Dark charge: Probing neutrino mass and dark matter

Phung Van Dong

Phenikaa Institute for Advanced Study, Phenikaa University, Yen Nghia, Ha Dong, Hanoi, Vietnam

I show that neutrino mass and dark matter can be explained in a gauge framework for only right-handed neutrinos \nu_{1,2,3R}. This theory assigns \nu_{1,2,3R} an abelian dark charge to be D=0, -1, and +1, respectively. It also imposes an inert Higgs doublet \eta and two Higgs singlets \xi, \phi with dark charge D=+1, -1, and +2, respectively. Hence, the dark charge is broken by \phi down to a dark parity P_D=(-1)^D, for which \nu_{2,3R}, \eta, and \xi are odd, whereas all other fields are even. The lightest of the odd fields is stabilized by P_D, responsible for dark matter. Neutrino masses are induced by a scotoseesaw, in which the seesaw part is mediated by \nu_{1R}, while the scotogenic part is mediated by \nu_{2,3R}. Hence, the hierarchy of atmospheric and solar mass splittings is explained by those between the tree-level and loop-level contributions.

Presenter: Phung Van Dong