  After a quarter of century of intense search for new physics beyond the
Standard Model (SM), two ideas stand out to naturally cope with (i) small
neutrino masses and (ii) a light higgs boson : Seesaw and SUSY. The combination
of these two ideas, i.e. SUSY seesaw exhibits a potentially striking signature:
a strong (or even very strong) enhancement of lepton flavour violation (LFV),
which on the contrary remains unobservable in the SM seesaw. Indeed, even when
supersymmetry breaking is completely flavour blind, Renormalisation Group
running effects are expected to generate large lepton flavour violating entries
at the weak scale. In Grand Unified theories, these effects can be felt even in
hadronic physics. We explicitly show that in a class of SUSY SO(10) GUTs there
exist cases where LFV and CP violation in B-physics can constitute a major road
in simultaneously confirming the ideas of Seesaw and low-energy SUSY.

High Energy Physics - Phenomenology