3 papers
hep-ph2024
New insights into axion freeze-in
Mudit Jain, Angelo Maggi, Wen-Yuan Ai +1
Freeze-in via the axion-photon coupling, , can produce axions in the early Universe. At low reheating temperatures close to the minimum allowed value $T_{\rm reh}\approx T_…
hep-ph2024
Axions and Primordial Magnetogenesis: the Role of Initial Axion Inhomogeneities
Filippo Anzuini, Angelo Maggi
The relic density of dark matter in the CDM model restricts the parameter space for a cosmological axion field, constraining the axion decay constant, the initial amplitude of t…
hep-ph2023
From QFT to Boltzmann: Freeze-in in the presence of oscillating condensates
Wen-Yuan Ai, Ankit Beniwal, Angelo Maggi +1
Scalar dark matter (DM), and axions in particular, have an irreducible abundance of particles produced by freeze-in due to portal interactions with the Standard Model plasma in the…