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hep-ph2026
Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments
Michele Cicoli, Francesco D'Eramo, Luca Di Luzio +18
The meV mass range has emerged as a focal point in axion physics, where advances in theory, cosmology, astrophysics, and experimental techniques converge. Axions in this mass range…
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…
hep-ph2024
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…