Speaker
Description
The Future Circular Collider (FCC-ee), a proposed electron-positron collider at CERN, is designed for precision studies of the electroweak sector, Higgs boson, and flavor physics due to its high luminosity. Its Tera-Z run will produce roughly $6 \times 10^{12}$ Z bosons on-shell, making it a strong and reliable neutrino source with well-defined energies. Although they are usually treated as missing energy, a small fraction of these neutrinos will interact with the detector itself. We present simulations of neutrino production across all Z decay channels and calculate the resulting interaction rates using neutrino-nucleus cross sections and the material composition of different leading FCC-ee detector concepts, such as CLD, IDEA, and ALLEGRO. Initial results indicate that several hundred neutrino interactions could occur per detector over the entirety of the Tera-Z run. We report progress toward refining these rates with neutrino event simulations in GENIE and more realistic detector geometries. We also assess the implications of neutrino interactions at future lepton colliders and the potential for dedicated instrumentation within FCC-ee detector concepts to capture these kinds of events.