Electroweak-like Baryogenesis with New Chiral Matter
  We propose a framework where a phase transition associated with a gauge
symmetry breaking that occurs (not far) above the electroweak scale sets a
stage for baryogenesis similar to the electroweak baryogenesis in the Standard
Model. A concrete realization utilizes the breaking of $SU(2)_R \times U(1)_X
\rightarrow U(1)_Y$. New chiral fermions charged under the extended gauge
symmetry have nonzero lepton numbers, which makes the $B-L$ symmetry anomalous.
The new lepton sector contains a large flavor-dependent CP violation, similar
to the Cabibbo-Kobayashi-Maskawa phase, without inducing sizable electric
dipole moments of the Standard Model particles. A bubble wall dynamics
associated with the first-order phase transition and $SU(2)_R$ sphaleron
processes generate a lepton asymmetry, which is transferred into a baryon
asymmetry via the ordinary electroweak sphaleron process. Unlike the Standard
Model electroweak baryogenesis, the new phase transition can be of the strong
first order and the new CP violation is not significantly suppressed by Yukawa
couplings, so that the observed asymmetry can be produced. The model can be
probed by collider searches for new particles and the observation of
gravitational waves. One of the new leptons becomes a dark matter candidate.
The model can be also embedded into a left-right symmetric theory to solve the
strong CP problem.
