Speaker
Nicola Barbieri
Description
We present updated constraints on the coupling of thermally-produced axion-like particles with photons and gluons, derived from recent cosmic microwave background (CMB) and baryon acoustic oscillation datasets. Additionally, we improve upon previous studies by using a more accurate axion distribution function obtained from solving the full Boltzmann equation, thereby incorporating spectral distortions arising from a non-instantaneous decoupling. Our analysis provides constraints based on the latest available observational data and includes forecasts for next-generation CMB experiments.
