Lepton Flavour Violation in SUSY SO(10)

Abstract

The study of rare processes, which are suppressed or even forbidden in the Standard Model (SM) of particle physics, has been considered for a long time a powerful tool in order to shed light on new physics, especially for testing low-energy supersymmetry (SUSY). Indeed, taking into account the fact that neutrinos have mass and mix, the Standard Model predicts Lepton Flavour Violating (LFV) processes in the charged sector to occur at a negligible rate [1]. As a consequence, the discovery of such processes would be an unambigous signal of physics beyond the Standard Model. In the present years, we are experiencing a great experimental effort in searching for LFV processes; several experiments are currently running, under construction or in project. Among them, it is worth to mention the B-factories, which are looking for LFV decays of the τ lepton [2], the MEG (μ → eγ) experiment at PSI [3], which is starting to take data, the approved μ → e conversion in nuclei experiment PRIME at the PRISM facility of J-PARK [4] and, finally, the proposal for a high luminosity SuperB (or Super Flavour) factory [5]. The current limits and the future experimental sensitivities to the main LFV processes are given in Table 1.