Figure 2: CAST excluded region (95% CL) in the ma–ga γ–plane. | Nature Physics

Figure 2: CAST excluded region (95% CL) in the ma–ga γ–plane.

From: New CAST limit on the axion–photon interaction

Figure 2

Solid black line: Envelope of all CAST results from 2003–2011 data11,12,13,14,15,16. Solid red line: Exclusion from the data here presented. Diagonal yellow band: Typical QCD axion models (upper and lower bounds set according to a prescription given in ref. 49). Diagonal green line: The benchmark KSVZ axion model with E/N = 0, where gaγ = (E/N−1.92)α/(2πfa), with fa the axion decay constant.

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