Speaker
Tae Hyun Jung
(KIAS)
Description
We consider a chiral gauge theory from which light composite Dirac
neutrinos dynamically emerge, augmented by a QCD axion to solve the strong CP
problem. We show that an interplay between the composite sector and the axion
can also simultaneously lead to successful baryogenesis and generate a correct
dark matter abundance via “co-genesis” without contradicting present constraints.
We predict ∆Neff ≥ 0.14 and m_a in the range O(10) µeV–O(10) meV, which can
be firmly tested by upcoming CMB experiments and axion searches.
