The growth of small-scale structures in dark matter is hard to
access with numerical, observational and conventional analytical methods.
However, information about initial conditions and the properties of dark matter are supposed to leave their footprints in these small scale structures.
I present analytical work, where we show with Kinetic Field Theory (KFT) that the dark matter density...
On the largest scales the Universe appears to be almost perfectly
homogeneous and isotropic, adhering to the cosmological principle. On smaller scales inhomogeneities and anisotropies become increasingly prominent, reflecting the origin, emergence and formation of structure in the Universe and its cosmological impact. Also, a range of tensions between various cosmological observations may...
We study leptogenesis from the decays of sterile (right-handed) neutrinos produced from bubble collisions at a first order phase transition. We explore the new parameter space opened up by this new mechanism, making comparisons with other existing leptogenesis scenarios (in particular involving bubbles), and find that bubble collisions enable leptogenesis with RHNs at the natural mass scale...
The microphysics of dark matter remains a mystery, with current data only setting upper bounds on interaction cross sections, or lower bounds on the mass in the case of a thermal relic. Going to higher redshift and smaller scales will let us improve these bounds, but more importantly, may allow us to distinguish between models with otherwise similar signals. In particular, I will present a...
