Search Publications

Primordial black holes from inflation with nonminimal derivative coupling

Wu, Puxun; Yu, Hongwei; Fu, Chengjie

We propose a novel enhancement mechanism of the curvature perturbations in the nonminimal derivative coupling inflation model with a coupling parameter related to the inflaton field. By considering a special form of the coupling parameter as a function of the inflaton, a period of ultra-slow-roll inflation can be realized due to the gravitationall…

Light dark matter from leptogenesis

Falkowski, Adam; Kuflik, Eric; Levi, Noam +1 more

We consider the implications of a shared production mechanism between the baryon asymmetry of the universe and the relic abundance of dark matter, that does not result in matching asymmetries. We present a simple model within a two sector leptogenesis framework, in which right handed sterile neutrinos decay out of equilibrium to both the standard …