Flavour Violating Axions

Abstract

I review the physics case for flavour violating axions. In particular, I argue that relaxing the assumption of the universality of the Peccei-Quinn current opens up new pathways, including: the relaxation of the Supernova bound on the axion mass, a possible connection with the Standard Model flavour puzzle and the experimental opportunity of discovering the axion via flavoured axion searches.

arXiv comment9 pages, 2 figures. Talk given at the Workshop `Flavour changing and conserving processes' 29-31 August 2019 (Capri Island, Italy). v2: references added

References in corpus (18)

• The QCD axion, precisely
• New experimental approaches in the search for axion-like particles
• Supernova 1987A Constraints on Sub-GeV Dark Sectors, Millicharged Particles, the QCD Axion, and an Axion-like Particle
• Physics potential of the International Axion Observatory (IAXO)
• Flaxion: a minimal extension to solve puzzles in the standard model
• Improved axion emissivity from a supernova via nucleon-nucleon bremsstrahlung
• Redefining the Axion Window
• Stellar Recipes for Axion Hunters
• Hadronic axion window and the big-bang nucleosynthesis
• Topological Susceptibility and QCD Axion Mass: QED and NNLO corrections
• A viable QCD axion in the MeV mass range
• Astrophobic Axions
• Flavourful Axion Phenomenology
• $U(1)$ flavour symmetries as Peccei-Quinn symmetries
• The quest for $\mu \to e\gamma$: present and future
• Search for the Familon via $B^{\pm }\to {\pi }^{\pm }{X}^0$, $B^{\pm }\to K^{\pm }{X}^0$, and $B^0\to K_S^0{X}^0$ Decays
• The NA62 experiment at CERN: status and perspectives
• The NA62 experiment at CERN: status and perspectives