24-28 June 2019
CERN
Europe/Zurich timezone
There is a live webcast for this event.

Spontaneous dark-matter mass generation along cosmological attractors in string theory

25 Jun 2019, 15:30
15m
4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room

CERN

100
Show room on map

Speaker

Thibaut Coudarchet (Ecole Polytechnique)

Description

I will talk about a new scenario for generating a relic density of non-relativistic dark matter in the framework of heterotic string theory with spontaneously broken supersymmetry and at finite temperature. In this scenario, contrary to the standard thermal freeze-out process, dark-matter particles are produced while they are still relativistic and then decouple from the thermal bath because of a sudden increase of their mass above the universe temperature. The mass increase is sourced by the destabilization of a modulus triggered when the temperature of the universe drops below the supersymmetry breaking scale. This phase transition is enforced to take place in certain models thanks to a cosmological attractor mechanism.

Presentation Materials