Speaker
Krzysztof Jodlowski
(National Centre for Nuclear Research)
Description
I will discuss dark matter production mechanism based on decays of a messenger WIMP-like state into a pair of dark matter particles that are self-interacting via exchange of a light, stable mediator. A natural by-product of this mechanism is a possibility of a late time transition to subdominant dark radiation component which increases the present-day Hubble rate. Simple realization of the proposed mechanism was studied in a Higgs portal dark matter model. We found a significant region of the parameter space that leads to a mild relaxation of the Hubble tension while simultaneously having the potential of addressing small-scale structure problems of ΛCDM.
| Are you are a member of the APS Division of Particles and Fields? | No |
|---|
Authors
Andrzej Hryczuk
(National Centre for Nuclear Research, Poland)
Krzysztof Jodlowski
(National Centre for Nuclear Research)
