Resonance searches for flavour anomalies

In “A B-anomaly motivated Z′ boson at the energy and precision frontiers”, we perform an in-depth analysis of a specific Z’ boson model (a stipulated heavy sibling of the Z boson of the SM), which could explain anomalies that are currently observed in B-meson decays. We analyse the potential for discovering this Z’ boson at the High-Luminosity Large Hadron Collider (HL-LHC), focusing on resonant di-lepton channels, and clarify how a potential discovery can be cross-validated in a dijet bump-hunt. If the HL-LHC fails to detect the Z’ boson directly, future precision measurements at facilities like the Future Circular Electron Collider (FCC-ee) running at the Z-pole could observe its indirect effects through quantum effects. A 100 TeV proton-proton collider (a potential follow-up from FCC-ee) will have the sensitivity to explore the entire parameter space favoured by flavour anomalies, enabling a comprehensive analysis of the model. (Read more)