Abstract
We propose a baryogenenesis mechanism that uses a rotating condensate of a Peccei-Quinn (PQ) symmetry breaking field and the dimension-five operator that gives Majorana neutrino masses. The rotation induces charge asymmetries for the Higgs boson and for lepton chirality through sphaleron processes and Yukawa interactions. The dimension-five interaction transfers these asymmetries to the lepton asymmetry, which in turn is transferred into the baryon asymmetry through the electroweak sphaleron process. QCD axion dark matter can be simultaneously produced by dynamics of the same PQ field via kinetic misalignment or parametric resonance, favoring an axion decay constant fa ≲ 1010 GeV, or by conventional misalignment and contributions from strings and domain walls with fa ∼ 1011 GeV. The size of the baryon asymmetry is tied to the mass of the PQ field. In simple supersymmetric theories, it is independent of UV parameters and predicts the supersymmtry breaking mass scale to be mathcal{O} (10 − 104) TeV, depending on the masses of the neutrinos and whether the condensate is thermalized during a radiation or matter dominated era. The high supersymmetry breaking mass scale may be free from cosmological and flavor/CP problems. We also construct a theory where TeV scale supersymmetry is possible. Parametric resonance may give warm axions, and the radial component of the PQ field may give signals in rare kaon decays from mixing with the Higgs and in dark radiation.
Highlights
Over several decades, as the standard models of particle physics and the early universe have solidified, the outstanding problems left unaddressed by this theory have become ever more pressing
We introduced and studied the generation of the baryon asymmetry of the universe from rotation of the PQ symmetry breaking field and the dimension-five interaction H†H†– a mechanism we call lepto-axiogenesis
The rotation of the PQ symmetry breaking field corresponds to the charge asymmetry of P, which is transferred into the asymmetry of the Higgs boson H and/or the lepton chirality through Yukawa couplings and the electroweak sphalerons
Summary
As the standard models of particle physics and the early universe have solidified, the outstanding problems left unaddressed by this theory have become ever more pressing. The observed baryon asymmetry can be explained by the mechanism, the kinetic misalignment mechanism overproduces axion dark matter, unless a new ingredient is added, for example by raising the temperature of the electroweak phase transition above the weak scale. Assuming the oscillation of P is initiated by the zero-temperature mass, the observed baryon asymmetry determines the scale of supersymmetry breaking to be 30 − 700 TeV and 300 − 7000 TeV for degenerate and hierarchical neutrino masses, respectively This should be compared with Affleck-Dine baryogenesis from squarks and sleptons, where the soft mass scale is not restricted. We discuss the case where the oscillation is initiated by a thermal potential and show that TeV scale supersymmetry can be consistent with baryogenesis from the rotation of P In these two theories, one with supersymmetry and the other without, we investigate how the parameter space is restricted when we require cogenesis of the baryon asymmetry and axion dark matter.
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