The smallness of neutrino masses provides a tantalizing allusion to physics beyond the standard model (SM). Heavy neutral leptons (HNL), such as hypothetical sterile neutrinos, accommodate a way to explain this observation, through the see-saw mechanism. If they exist, HNL could also provide answers about the dark matter nature, and baryon asymmetry of the universe. A search for the production...
Heavy neutrinos with masses below the electroweak scale can simultaneously
generate the light neutrino masses via the seesaw mechanism and the baryon asymmetry of the universe via leptogenesis.
The requirement to explain these phenomena imposes constraints on the mass spectrum of the heavy neutrinos, their flavor mixing pattern and their CP properties.
We combine bounds...
In this talk, I will show how the cosmological and astrophysical implications of a dark matter-neutrino coupling allow us to exclude a large region of the parameter space for different simplified dark matter models.
We propose a model in which the pattern of the mass matrix for the inverse seesaw originates from a dynamical breaking of a global B-L symmetry.
The smallness of the off-diagonal parameters in the mass matrix is hence explained in a natural way by the symmetry-breaking vacuum expectation value of a scalar field.
To ensure an anomaly free theory we introduce additional degrees of freedom whose...
Heavy neutrino states can be up-scattered from neutral-current interactions between neutrinos and nuclei in several new physics models. If the incoming neutrino is energetic enough, the heavy neutrino may travel some distance before decaying. In this talk, we consider the tau neutrinos created by the flavor oscillation of the atmospheric muon neutrino flux as a source of such events. At...
This talk features the state-of-the-art measurements of CP violation in decays of beauty hadrons, performed using data taken at the LHC. Special focus is put on the most recent analyses performed by the LHCb experiment.
