Conveners
Baryongenesis
- Luca Vecchi
In this talk, we will revisit a class of lepton-flavor non-universal $U(1)$ gauge extensions of the Standard Model that provide a robust mechanism to generate neutrino masses and mixing angles via a high-scale seesaw while ensuring exact proton stability to all orders in the effective field theory. This framework naturally realizes minimal thermal leptogenesis, offering a viable explanation...
We propose a scenario for cogenesis of baryon asymmetry and dark matter driven by Majoron realizing spontaneous leptogenesis. It can be achieved assuming either an initial kinetic motion or a conventional misalignment with symmetry non-restoration.
A derivative coupling of an axion like particle (ALP) with a B − L current may lead to the baryon asymmetry of the Universe via spontaneous leptogenesis provided a lepton number breaking interaction prevails in thermal equilibrium. Conventionally, such scenario works only for heavy ALPs and high reheating temperature due to the fact that the same lepton number breaking contribution is tied up...
The matter-antimatter asymmetry of the Universe represents one of the main open questions in particle physics and cosmology. In this talk, we will present a novel realization of cold baryogenesis, a mechanism involving the formation and decay of topological defects associated with the gauge group of the Standard Model known as SU(2) textures, that relies on the out-of-equilibrium dynamics...
I will discuss the implications of precision measurements of light element abundances in concordance with the Cosmic Microwave Background for scenarios of physics
beyond the Standard Model that generate large inhomogeneities. I will show that precision Big Bang nucleosynthesis (BBN) imposes strong constraints on any mechanism that
produces large scale inhomogeneities at temperatures of the...
