Webinar: Dark Matter halos from parametric resonance and their signatures

por Asimina Arvanitaki (Perimeter Institute for Theoretical Physics)

martes 10 mar. 2020 15:00 → 16:00 Europe/Madrid

Online (Online)

While there is undisputed evidence for Dark Matter, its nature and
properties remain one of the biggest questions of our time. What is Dark
Matter(DM)? How is it produced? Does it have interactions other than
gravitational? In this talk, I will describe how a large class of bosonic
particles can account for the DM of the Cosmos. These particles can be much
lighter than those of the Standard Model with Compton wavelengths that are
bigger than the size of our solar system or smaller than a millimeter. In
the presence of attractive self-interactions, there is a parametric
resonance effect in the early universe that can cause growth of structure at
small scales, an effect so dramatic that can cause structures to collapse
well before matter-radiation equality. The signatures of this effect span
several experiments and orders of magntude in parameter space. When the DM
boson is heavy, the dense DM halos can alter the optimal search strategies
in direct detection experiments. When the DM boson is light, these halos may
leave their imprint in searches for dark matter substructure, primordial
gravitational waves and alter the star formation history of the universe.

Please join the meeting by clicking this link:
https://eu.bbcollab.com/guest/856b00426647492da706722b3b299f4a