Speaker
Andreas Ringwald
(DESY)
Description
A minimal extension of the Standard Model (SM) providing a
complete and consistent picture of particle physics and
cosmology up to the Planck scale is presented. We add to the
SM three right-handed SM-singlet neutrinos, a new
vector-like color triplet fermion and a complex SM singlet
scalar ? whose vacuum expectation value at ?1011 GeV breaks
lepton number and a Peccei-Quinn symmetry simultaneously.
Primordial inflaton is produced by a combination of ? and
the SM Higgs. Baryogenesis proceeds via thermal
leptogenesis. At low energies, the model reduces to the SM,
augmented by seesaw-generated neutrino masses, plus the
axion, which solves the strong CP problem and accounts for
the dark matter in the Universe. The model can be probed
decisively by the next generation of cosmic microwave
background and axion dark matter experiments.
Primary author
Andreas Ringwald
(DESY)
