Fig 1. Overall Axion photon coupling parameter space. (Last updated on Nov 8, 2020)

The colored region above the blue dashed line is excluded by CAST experiments [1,2], and green dashed lines are excluded by IAXO experiment [3].

The QCD axion band is expressed in a bright peach area.

Fig 2. Parameter space about Axion mass of µeV . Constraints are given by ADMX [4,5,6], UF [7],HAYSTAC[8], RBF [9,10], CAPP-8TB [11]