Speaker
Kai Murai
(Tohoku University)
Description
An axion can couple to photons in a parity-violating manner. Through this coupling, variations in the axion field induce a rotation of the linear polarization plane of photons, i.e., cosmic birefringence. Recently, a hint of isotropic cosmic birefringence has been reported in the EB cross-correlation of the CMB data. In this talk, I will explain the relation between the EB signal and cosmic birefringence induced by the axion and discuss its implication for the properties of the axion.
Primary author
Kai Murai
(Tohoku University)
