Baryogenesis and Dark Matter in $U(1)$ Extensions

TL;DR

This paper reviews models extending the Standard Model with a $U(1)$ symmetry that simultaneously address baryogenesis and dark matter origins, aligning with current neutrino data and cosmological observations.

Contribution

It discusses specific $U(1)$ extension models that generate baryon asymmetry and dark matter, with some models preserving lepton number and matching neutrino mixing data.

Findings

Models produce correct baryon asymmetry

Dark matter to baryon ratio matches observations

Neutrino mass hierarchy consistent with experiments

Abstract

A brief review is given of some recent works where baryogenesis and dark matter have a common origin within the $U(1)$ extensions of the standard model and of the minimal supersymmetric standard model. The models considered generate the desired baryon asymmetry and the dark matter to baryon ratio. In one model all of the fundamental interactions do not violate lepton number, and the total $B-L$ in the Universe vanishes. In addition, one may also generate a normal hierarchy of neutrino masses and mixings in conformity with the current data. Specifically one can accommodate $\theta_{13}\sim 9^{\circ}$ consistent with the data from Daya Bay reactor neutrino experiment.