Particle Physics Seminar: Expect the Unexpected

Abstract:

In the absence of evidence for new physics at the LHC, it is important to think beyond the standard scenarios of natural theories and the signatures they predict. I will motivate two non-standard theories that may address the naturalness problem: supersymmetric models with R-parity violation and models of neutral naturalness. Both scenarios predict non-standard LHC signatures in the form of displaced decays. 

We derive the first limits on classes of non-standard supersymmetric models with long-lived lightest superpartners, as well as the first constraints on a displaced Higgs boson with a lifetime less than 10 cm. After obtaining the results from LHC Run 1, we propose search strategies and present projections for LHC Run 2.