Speaker
Description
In this talk, we discuss the possibility of detecting new SM-neutral vector bosons ($Z'$) that couple exclusively to leptons at the FCC-ee. Focusing on the $Z'$ production with a radiated photon, we show that the FCC-ee can significantly extend the unprobed parameter space by increasing the exclusion in the coupling by one to two orders of magnitude in the kinematically allowed mass range (from 10 GeV to 365 GeV), with the leading sensitivity being driven by the muon search channel. Further, we explore the possibility of improving the sensitivity of the FCC-ee to this model through the modification of the dilepton invariant mass resolution and the photon energy resolution, and conclude by taking a look at the impact of systematic uncertainties on the expected sensitivities.
