Speaker
Mikko Laine
(AEC, ITP, U. Bern)
Description
There has been recent interest in leptogenesis induced by "light"
right-handed neutrinos, with masses in the 1 - 100 GeV range. We
review the form of rate equations applying to this system, as well as
the computation of rate coefficients to leading order in Standard
Model couplings. The resulting non-linear system is solved
numerically, taking into account that right-handed neutrinos are
neither in kinetic, nor in chemical, nor in helicity-flip
equilibrium. The possibility of producing the observed baryon
asymmetry is confirmed. A remaining challenge is to scan the full
parameter space of right-handed neutrino masses and Yukawa couplings,
searching for islands that can be confronted with experiment.
Primary author
Mikko Laine
(AEC, ITP, U. Bern)
Co-author
Jacopo Ghiglieri
(CERN)
