130 citations · 934 across the 27 of their papers we have counts for
3 papers · 2 filters
Thermal QCD Axions across Thresholds
Francesco D'Eramo, Fazlollah Hajkarim, Seokhoon Yun
Thermal axion production in the early universe goes through several mass thresholds, and the resulting rate may change dramatically across them. Focusing on the KSVZ and DFSZ frame…
Thermal axion production at low temperatures: a smooth treatment of the QCD phase transition
Francesco D'Eramo, Fazlollah Hajkarim, Seokhoon Yun
We study thermal axion production around the confinement scale. At higher temperatures, we extend current calculations to account for the masses of heavy quarks, whereas we quantif…
Axion Dark Matter in the Time of Primordial Black Holes
Nicolás Bernal, Fazlollah Hajkarim, Yong Xu
We investigate the production of QCD axion dark matter in a nonstandard cosmological era triggered by primordial black holes (PBHs) that fully evaporate before the onset of BBN. Ev…