3 papers
hep-ph2025
Aspects of Sommerfeld Enhancement in the light of Halo gamma-ray excess
Yongsoo Jho, Jeonghwan Park, Min Gi Park +1
We examine Sommerfeld enhancement in dark matter annihilation as a potential origin of the halo-like gamma-ray excess near GeV reported by Totani. A minimal model w…
hep-ph2025
Superheavy Supersymmetric Dark Matter for the origin of KM3NeT Ultra-High Energy signal
Yongsoo Jho, Seong Chan Park, Chang Sub Shin
We propose an explanation for the recently reported ultra-high-energy neutrino signal at KM3NeT, which shows no clear association with known astrophysical sources. While decaying d…
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…