Yann Mambrini - "Alternative scenarios for dark matter productions in the Early Universe, and its consequences"

Tuesday 12 Nov 2019, 14:30 → 16:00 Europe/Rome

Aula B (Via della Vasca Navale 84)

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.

SeminarRomapdf.pdf