News & Events
Patrick Fitzpatrick (MIT)
McDonald Institute Seminar Series
Date: December 1, 2020
Time: 2:30pm - 3:30pm
New Pathways to the Relic Abundance of Vector-Portal Dark Matter
In the conventional weakly-interacting massive particle (WIMP) paradigm the late-time density of dark matter (DM) is set by the rate of two-body annihilations, but there has been considerable recent interest in exploring alternative DM scenarios where other interactions control the final abundance. I will show that by fully exploring the parameter space of a simple, weakly-coupled dark sector, we can find a rich set of novel pathways that lead to the observed relic density of DM. In particular, we can identify and characterize a general class of mechanisms in which the DM relic abundance is determined by processes controlling the thermal coupling of the DM and Standard Model (dubbed the KINetically DEcoupling Relic — KINDER), generalizing previously-studied special cases of this behaviour.
McDonald Insititute seminars bring together experimental and theoretical astroparticle physicists and astronomers. They are held approximately fortnightly, September to November and January to March, and on an ad hoc basis outside of term. They currently take place on Tuesdays at 2:30 PM on Zoom. Contact Aaron Vincent if you would like to attend.