DISCRETE 2024 in Ljubljana

Non-vanilla Axion Solutions to the Strong CP Problem

3 Dec 2024, 17:30

15m

Urška 1 (Exhibition and Convention center )

Parallel Session Talk Parallel track Neutrinos and ALPs 1

Speaker

Felix Yu (Johannes Gutenberg University Mainz)

Description

I discuss the status of model-building for the strong CP problem, emphasizing the phenomenology non-vanilla models that enhance or lighten the axion mass. Particular importance is placed on the emergence of the global Higgs symmetries in multi-scalar field theories and various explicit, anomalous, and soft-breaking contributions to select the Peccei-Quinn symmetry and the axion. Models with enhanced axion masses feature new colored states that may be accessible at high-energy colliders, while models that lighten the axion mass generally involve fine-tuning. Nonetheless, such fine-tuning can be ameliorated with a Nelson-Barr extension.

Presentation materials

FY_Non-vanilla_Axions.pdf