Flavoured axion-like particles

Flavoured axion-like particles

Flavoured axion-like particles Pseudo Nambu-Goldstone bosons (also known as axion-like particles) with flavour-violating couplings to the Standard Model (SM) fermions are a generic consequence of spontaneously-broken global U(1) symmetries, if the SM fermions carry...
The first image of a black hole

The first image of a black hole

The first image of a black hole I will briefly discuss how the first image of a black hole was obtained by the EHT collaboration. In particular, I will describe the theoretical aspects that have allowed us to model the dynamics of the plasma accreting onto the black...
Spin of primordial black holes

Spin of primordial black holes

Spin of primordial black holes We discuss the spin of primordial black holes (PBH) formed during radiation domination under the assumption of Gaussian statistics. They are formed by the collapse of rare fluctuations. We argue that their angular momentum is quadratic...