Prof. Dr. Gudrun Hiller

The charm sector provides new and unique insights into flavor and BSM physics, complementing longstanding programs with kaons and B-mesons. We report status and  progress in null test observables from theory on rare decays of charm mesons and baryons into invisibles, photons and leptons, and where flavor experiments are currently pushing this frontier. We also give prospects of the reach in Tera-Z-facilities such as FCC-ee, CEPC and STCF, where charm rates are unprecendented in a clean environment.