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Fuzzy Dark Matter from Infrared Confining Dynamics
Physical Review Letters
A very light boson of mass O(10^-22) eV may potentially be a viable dark matter (DM) candidate which can avoid phenomenological problems associated with cold DM. Such "fuzzy DM (FDM)" may naturally be an axion with a decay constant f_a ∼ 10^16 10^18 GeV, and a mass m_a ∼μ^2/f_a with μ∼ 10^2 eV. Here we propose a concrete model where μ arises as a dynamical scale from infrared confining dynamics, analogous to QCD. Our model is an alternative to the usual approach of generating μ through stringdoi:10.1103/physrevlett.118.141801 pmid:28430462 fatcat:z3u2yssz7jezrmpteiyyddljay