4 papers
Z' portal dark matter from post-inflationary reheating: WIMPs, FIMPs, and UFOs
Stephen E. Henrich, Yann Mambrini, Keith A. Olive
We investigate the production of dark matter (DM) via a heavy mediator during the post-inflationary reheating epoch. In particular, we study production from three mechanisms w…
Ultra-relativistic freeze-out: a bridge from WIMPs to FIMPs
Stephen E. Henrich, Yann Mambrini, Keith A. Olive
We re-examine the case for dark matter (DM) produced by ultra-relativistic freeze-out (UFO). UFO is the mechanism by which Standard Model (SM) neutrinos decouple from the radiation…
Ultra-Relativistic Freeze-Out During Reheating
Stephen E. Henrich, Mathieu Gross, Yann Mambrini +1
We perform a thorough investigation of (ultra)relativistic freeze-out (UFO) during reheating. While the standard WIMP (non-relativistic freeze-out) and FIMP (freeze-in) paradigms h…
Aspects of Gravitational Portals and Freeze-in during Reheating
Stephen E. Henrich, Yann Mambrini, Keith A. Olive
We conduct a systematic investigation of freeze-in during reheating while taking care to include both direct and indirect production of dark matter (DM) via gravitational portals a…