Speaker
Kairui Zhang
(University of Oklahoma-Norman)
Description
We present a thermal dark matter (DM) scenario in which a phase transition after freeze-out changes both the DM spectrum and the dominant annihilation process, allowing an enhanced present-day annihilation rate with suppressed direct detection. The surviving relic differs in mass and composition from the original state. We find relic-compatible solutions with present-day annihilation rates more than an order of magnitude above the canonical thermal value, without tuning to a mediator resonance, while satisfying direct-detection bounds.
Authors
Anibal Medina
(The University of Melbourne)
Carlos E.M. Wagner
Kairui Zhang
(University of Oklahoma-Norman)
Peisi Huang