Speaker
Seokhoon Yun
(KIAS)
Description
TBAThe physics of conversion of the photon to ALP (axion-like particle) induced by the conventional ALP coupling to the photon in the presence of the background magnetic field has been well studied. This interesting phenomenological aspect can be used to probe a signal of the new physics beyond the standard model. As an example, the EDGES anomaly of the 21cm signal and the spectral irregularities of the Fermi-LAT data can be explained by the conversion of the photon to ALP. However, the corresponding ALP mass and coupling are in a severe tension with the present constraints. With this motivations, I will talk about our recent work on the photon-ALP-dark photon oscillation as an alternative possibility to resolve such difficulties.