Model-Independent Bounds on Kinetic Mixing

Figure 2

95% CL exclusions in the (𝑚_𝑍′,𝜖). The cyan region is excluded for a “wide” 𝑍^′ and the purple region is for a “narrow” 𝑍^′. The blue region shows the bounds placed by CDF on direct production of 𝑍^′s. The inset illustrates the constraints on 𝑚_𝑍′ near the 𝑍⁰ pole. The bound from the (𝑔−2)_𝜇 is shown in dark grey, and the light grey, dashed region shows the sensitivity from model-dependent BaBar searches.