Oral Presentation

Cosmic birefringence by the rotating ALP

Author(s): 直川史寛

Presenter: Fumihiro Naokawa (the University of Tokyo)

Cosmic birefringence is a recently reported CMB signal of cosmological parity violation. This signal is a promising probe of new physics and Axion-Like Particle (ALP) is attracting attention as its origin. I will talk about my ongoing work on new model of ALP which can produce cosmic birefringence, and discuss its effect on EB-power spectrum of CMB observations.