QCD axion dark matter from long-lived domain walls during matter domination

Article, Preprint English OPEN
Keisuke Harigaya; Masahiro Kawasaki;

The domain wall problem of the Peccei–Quinn mechanism can be solved if the Peccei–Quinn symmetry is explicitly broken by a small amount. Domain walls decay into axions, which may account for dark matter of the universe. This scheme is however strongly constrained by ove... View more
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