$\nu$DFSZ: a technically natural non-supersymmetric model of neutrino masses, baryogenesis, the strong CP problem, and dark matter

We describe a minimal extension of the standard model by three right-handed neutrinos, a scalar doublet, and a scalar singlet (the “$\nu$DFSZ”) which serves as an existence proof that weakly coupled high-scale physics can naturally explain phenomenological shortcomings of the SM. The $\nu$DFSZ can explain neutrino masses, baryogenesis, the strong CP problem, and dark matter, and remains calculably natural despite a hierarchy of scales up to $\sim 10^{11}$ GeV. It predicts a SM-like Higgs boson, (maximally) TeV-scale scalar states, intermediate-scale hierarchical leptogenesis ($10^5$\text{ GeV}$\lesssim M_{N}\lesssim 10^7$\text{ GeV}$$), and axionic dark matter.