Speaker
Clemente Smarra
(Sissa)
Description
A local flavour symmetry acting on the quarks of the Standard Model can automatically give rise to an accidental global $U(1)$ which remains preserved from sources of explicit breaking up to a large operator dimension, while it gets spontaneously broken together with the flavour symmetry. Such non-fundamental symmetries are often endowed with a mixed QCD anomaly, so that the strong CP problem is automatically solved via the axion mechanism. We illustrate the general features required to realise this scenario, and we discuss a simple construction based on the flavour group $SU(3)×SU(2)×U(1)_F$ to illustrate how mass hierarchies can arise while ensuring at the same time a high quality Peccei-Quinn symmetry.
Faculty position
PhD student
| Topic Field | Particle Physics |
|---|
Primary authors
Clemente Smarra
(Sissa)
Enrico Nardi
(Istituto Nazionale di Fisica Nucleare)
Luc Darmé
(Laboratori Nazionali di Frascati)
