Wash-In Leptogenesis

We present a leptogenesis mechanism based on the standard type-I seesaw model that successfully operates at right-handed-neutrino masses as low few 100 TeV. This mechanism, which we dub "wash-in leptogenesis", does not require any CP violation in neutrino sector and can be implemented even regime of strong wash-out. The key idea behind wash-in is to generalize freeze-out nonminimal cosmological background chemical potentials all particles equilibrium temperature are allowed take arbitrary values. sets stage for building plethora new baryogenesis models where generated high temperatures reprocessed generate nonvanishing B-L asymmetry temperatures. As concrete examples, discuss after axion inflation context grand unification.