The Zoom link for the Sydney-CPPC seminars is The seminars are open to everyone.


Cosmology of Axion Rotation

by Keisuke Harigaya (University of Chicago)


We will introduce new cosmological dynamics of the QCD axion, where the axion field rotates in field space. Axion dark matter may be produced from the kinetic energy of the rotation and the required axion decay constant is much below the prediction of the conventional evolutions. The angular momentum of the rotation is transferred into baryon asymmetry through baryon number violating interactions. We discuss the electroweak sphaleron process and some beyond-standard model processes and predictions on the parameters of each theory.