Programme

O.14 -- Oral, VCTP-50

Date: Tuesday, 5 August 2025

Time: 16:00 - 16:25

Towards a dark grand unification

Phung Van Dong (1), Le Duc Thien (2)

(1) Phenikaa Institute for Advanced Study, Phenikaa University, Yen Nghia, Ha Dong, Hanoi, Vietnam; (2) Industry High School, Chi Lang, Dong Tien, Hoa Binh, Vietnam

I show that the trinification encompasses the dark sector of the universe. The trinification gauge symmetry contains a matter parity that assigns the new fields to be odd, while the normal fields to be even. The lightest of the odd fields, either a neutral fermion or a neutral scalar, is stabilized by the matter parity, responsible for dark matter. The odd vector field cannot be a dark matter candidate as ruled out by direct detection experiment. This setup suppresses dangerous flavor-changing neutral currents due to down-type quark mixings naturally by the matter parity. Neutrino masses and phenomenological processes are hinted.

Presenter: Phung Van Dong