Speaker
Prof.
Luca Visinelli
(University of Salerno & INFN)
Description
The QCD axion provides a compelling solution to the strong-CP problem and a leading dark-matter candidate. Its relic abundance depends on the epoch of Peccei–Quinn symmetry breaking and the thermal history of the early Universe. This talk examines how axion dark matter can populate the 0.49–1.49 μeV mass window targeted by haloscopes in Frascati National Laboratories. Although standard post-inflationary predictions generally favour larger masses, this range is compatible with pre-inflationary misalignment and can also arise from late entropy production or modified axion mass–decay-constant relations. A signal revealed in a haloscope would probe both axion microphysics and otherwise inaccessible pre-BBN cosmology.
Author
Prof.
Luca Visinelli
(University of Salerno & INFN)