摘要
We look at the prospects for detecting light bosons, X, at proposed Z factories assuming a production of 1012 Z bosons. Such a large yield is within the design goals of future FCC-ee and CEPC colliders. Specifically, we look at the cases where X is either a singlet scalar that mixes with the standard model Higgs or a vector boson with mass 1≲MX≲80 GeV. We find that several channels are particularly promising for discovery prospects. In particular, Z→ffX and Z→VQX give a promising signal above a very clean standard model background. We also discuss several channels that have too large a background to be useful.