Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Flavor Violating Axions in the Early Universe

Jul 8, 2022, 11:35 AM
Room 11 (Magenta A)

Room 11 (Magenta A)

Parallel Talk Astroparticle Physics and Cosmology Astroparticle Physics and Cosmology


Seokhoon Yun (Istituto Nazionale di Fisica Nucleare)


Flavor violating axion couplings can be in action before recombination, and they can fill the early universe with an additional radiation component. Working within a model-independent framework, we consider an effective field theory for the axion field and quantify axion production. Current cosmological data exclude already a fraction of the available parameter space, and the bounds will improve significantly with future CMB-S4 surveys. Remarkably, we find that future cosmological bounds will be comparable or even stronger than the ones obtained in our terrestrial laboratories.

In-person participation Yes

Primary author

Seokhoon Yun (Istituto Nazionale di Fisica Nucleare)


Presentation materials