An SO(10) \times SO(10)' model for common origin of neutrino masses, ordinary and dark matter-antimatter asymmetries

Abstract

We propose an SO(10) × SO(10) ′ model to simultaneously realize a seesaw for Dirac neutrino masses and a leptogenesis for ordinary and dark matter-antimatter asymmetries. A (16×16 ′ ) H scalar crossing the SO(10) and SO(10) ′ sectors plays an essential role in this seesaw-leptogenesis scenario. As a result of lepton number conservation, the lightest dark nucleon as the dark matter particle should have a determined mass around 15 GeV to explain the comparable fractions of ordinary and dark matter in the present universe. The (16 × 16′ ) H scalar also mediates a U (1) em × U (1) ′ em kinetic mixing after the ordinary and dark left-right symmetry breaking so that we can expect a dark nucleon scattering in direct detection experiments and/or a dark nucleon decay in indirect detection experiments. If a proper mirror symmetry is imposed, our Dirac seesaw will not require more unknown parameters than the canonical Majorana seesaw.

New chiral fermions, a new gauge interaction, Dirac neutrinos, and dark matter

“…That is, the introduction of new, heavy degrees of freedom necessarily renders all neutrinos and DS particles massive, but does it in a way that lepton number remains a good quantum number [9]. Examples of recent models that make use of this idea are [17].…”

Unified dark matter with intermediate symmetry breaking scales

“…We use this to develop a way of explaining the similarity of DM mass, the focus of this paper. In further work it would be interesting to see more complete theories that explore the baryogenesis of the two sectors such as in the recent work of [23] where an SO (10) × SO (10) model explored baryogenesis via leptogenesis with visible and dark QCD scales set at similar values. Our work is also related to other investigations into the possibility of a dark QCD such as [24][25][26][27][28][29][30].…”