NEXT ELUSIVES AND INVISIBLESPLUS WEBINAR: "Filtered Dark Matter: Setting the Dark Matter Abundance Through a First Order Phase Transition"

January 14, 2020
3:00pm to 4:00pm

IFT Audiovisual Room

Specialist level
Joachim Kopp
CERN & Mainz Institute for Theoretical Physics & PRISMA Cluster of Excellence

IFT Audiovisual Room


Abstract: We discuss the critical role that first order phase transitions in the early Universe may play in the production of dark matter.  We describe a mechanism dubbed "Filtered Dark Matter", where it is assumed that dark matter particles acquire mass during the phase transition, making it energetically unfavourable for them to enter the expanding bubbles of the massive phase. Instead, most of them are reflected off the advancing bubble walls and quickly annihilate away in the massless phase. Only the dark matter particles which have entered the bubbles survive to constitute the observed dark matter today.  Towards the end of the talk, we will also briefly mention other ways in which phase transitions can be crucial in determining the dark matter abundance, and we discuss how such scenarios can be probed experimentally.


Please join the meeting by clicking this link:

IMPORTANT: we have changed the videoconferencing and we will use Blackboard Collaborate from now on. The interface is very similar to the Adobe Connect one; however, we encourage you to connect 5 minutes in advance to become familiar with the new system. We have tested it on Mac OS with Chrome, and Linux with Firefox, and both worked fine for us.