6533b82bfe1ef96bd128d85c
RESEARCH PRODUCT
Filtered Dark Matter at a First Order Phase Transition.
Andrew J. LongJoachim KoppJoachim KoppMichael J. BakerMichael J. Bakersubject
PhysicsPhase transition530 PhysicsCritical phenomenaDark matterFOS: Physical sciencesGeneral Physics and Astronomyhep-phAstrophysics10192 Physics InstituteAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciences010306 general physicsMerge (version control)Particle Physics - Phenomenologydescription
We describe a new mechanism of dark matter production in the early Universe, based on the dynamics of a first order phase transition. We assume 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. The bubbles eventually merge as the phase transition is completed, and only the dark matter particles which have entered the bubbles survive to constitute the observed dark matter today. This mechanism can produce dark matter with masses from the GeV scale to above the PeV scale, including a large region of viable parameter space beyond the Griest--Kamionkowski bound. Current and future direct detection and collider experiments can probe much of the viable parameter space.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-10-09 | Physical review letters |