Ultralight Dark Matter from the Edge of Field Space

by Mathias Becker

Thursday 11 Dec 2025, 13:30 → 14:30 Europe/Zurich

4/2-037 - TH meeting room (CERN)

I will present a new framework for ultralight dark matter based on a scalar field that experiences boundaries in field space. Such boundaries give rise to wallions, excitations whose masses are exponentially suppressed yet radiatively stable. After introducing the basic setup, I will discuss how wallions behave in the early universe and how these boundaries may form dynamically.