Speaker
ALESSANDRO VALENTI
Description
Froggatt-Nielsen models typically predict the existence of a light axion-like particle, pushing the new dynamic to a very high scale.
In this talk I will focus on models based on $Z_N$ discrete symmetries, which are counterexamples in which the new scale might in fact be much lower.
I will first chart the allowed parameter space from a set of theoretical considerations, and then focus on two models based on $Z_4$ and $Z_8$ symmetries. For these, I will introduce explicit renormalizable UV completions and study the models' phenomenology in detail, highlighting the interplay between the effects of the ALP and of the UV fields.
