| Speaker: | Keisuke Harigaya (U. Chicago) |
|---|---|
| Title: | Cosmology of Axion Rotation |
| Date (JST): | Mon, Aug 07, 2023, 13:30 - 15:00 |
| Place: | Seminar Room A |
| Abstract: | We will introduce new cosmological dynamics of the 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. We also discuss cosmological signals of the scenario. |
