Seminario di Fisica Teorica INFN/DIFI

Start date

19/02/2025 13:00

End date

19/02/2025 15:00

Place

Dipartimento di Fisica - A501

Speakers

Dr. Arsenii Titov
Padova University

We formulate general conditions under which the strong CP problem is solved by spontaneous CP violation. Quark mass matrix elements are polynomials in the CP-breaking order parameters, engineered such that their determinant is a real constant. These conditions can be realised in supersymmetric theories with an anomaly-free local flavour symmetry, suggesting a unified solution to the strong CP problem and the flavour puzzle.  Our solution can be implemented using either a local U(1) symmetry or modular invariance. We present concrete modular-invariant realisations. Heavy vector-like quarks are in general not required, but their presence allows for models where coloured particles fill non-singlet representations of the finite modular groups.