Seminario INFN di Fenomenologia delle Particelle Elementari

I'll review the hints of lepton flavour universality violation that have recently been observed in B-physiscs observables. In light of this, I'll review the most significant contraint given by low energy data on possible model building approaches. As I will show, an interesting solution is introducing a gauge vector leptoquark. This can be achieved in a PS3 model: the detailed study of the phenomenology of this model shows a deep link between the high energy dynamics and the yukawa couplings as well as interesting signatures in low energy observables.