APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Ken'ichi Saikawa (Max-Planck-Institute )
Title: Stellar hints for axion hunters
Date (JST): Wed, Aug 08, 2018, 13:30 - 14:30
Place: Seminar Room A
Related File: 2078.pdf
Abstract: The current observations of stars at different evolutionary stages show a mild preference for additional energy losses than the standard case. We discuss the possibility to explain such excessive energy losses in terms of the axion, the hypothetical pseudo Nambu-Goldstone boson predicted by the Peccei-Quinn solution to the strong CP problem. We explore whether typical axion models such as DFSZ-type and KSVZ-type models can accommodate all or a part of the stellar cooling anomalies, and provide the best fit of their parameters. These fits generically prefer an axion mass around 10 meV, and such a preferred mass range can be probed by future experiments. We also show that the axion in this mass range can be the main constituent of dark matter.