Searching for the light leptophilic gauge boson Z x via four-lepton final states at the CEPC* *Supported by the National Natural Science Foundation of China (11875157, 12147214)

Abstract

We investigate the possibility of detecting the leptophilic gauge boson predicted by the model via the processes and at the Circular Electron Positron Collider (CEPC) with a center of mass energy GeV and luminosity . We provide the expected sensitivities of the CEPC to the parameter space at the , , , and levels.