Fig. 5: The experimental limits on the vector coupling constant gV of the Z’ particle.
From: Constraints on exotic spin-velocity-dependent interactions

The black solid line and red dotted line are set by this work by searching for the exotic spin-dependent force. The blue dashed line is set by the g−2 experiment41,44,45, the brown dotted-dashed line is set by the neutrino production in the expansion of the early universe41, the green dashed line, is from the analysis of the supernova SN1987 cooling44. The shaded areas are the parameter space excluded by the corresponding experiments.