2 papers
hep-ph2025
Primordial Black Holes as a Factory of Axions: Extragalactic Photons from Axions
Yongsoo Jho, Tae-Geun Kim, Jong-Chul Park +2
Primordial black holes (PBHs) are significant sources of axions and axion-like particles (ALPs), provided their Hawking temperature exceeds the particles' masses. Given the predomi…
hep-ph2024
Cosmic Birefringence by Dark Photon
Sung Mook Lee, Dong Woo Kang, Jinn-Ouk Gong +3
We study the kinetic mixing between the cosmic microwave background (CMB) photon and the birefringent dark photon. These birefringent dark photon may exist in parity-violating dark…