Yann Mambrini (Orsay): Alternative scenarios for dark matter productions in the Early Universe, and its consequences

Montag, 24. Februar 2020 14:00

Ort: Seminarraum, Boltzmanngasse 5. 5. Stock

Despite very indirect but clear astrophysical and cosmological evidences of the presence of dark matter in our Universe, its nature is still unknown. Not only the recent direct detection limits exclude the simplest electroweak extensions of the Standard Model like Higgs portal but even question the WIMP paradigm. Recently, refined cosmological analysis on the reheating mechanism combined with the freeze-in mechanism showed that EeV dark matter particles can be produced from the thermal bath at very early stages of the reheating. From GUT constructions to high-scale supergravity, several motivated models enter in this category.

We wil detail in this seminar how the production mechanism appears naturally in several motivated UV extensions of the Standard Model, and how ~EeV signals observed by present and future neutrino detectors could be a signature of such mechanism.


Seminarraum, Boltzmanngasse 5, 5. Stock