Bosonic dark matter in a coherent state driven by thermal fermions
  If there is a scalar boson field interacting dominantly with a quark or a
lepton in the thermal background, its coherent oscillation can be generated
through the thermal effect and becomes a good dark matter candidate in a wide
range of the coupling and masses. We describe the general features of this
mechanism and analyze how it works in various situations considering asymptotic
limits where analytic solutions can be obtained.
