Speaker
Description
Many BSM models predict the existence of neutrally-charged long-lived particles (LLPs) with macroscopic lifetimes. When these LLPs decay back into SM particles, they leave a striking detector signature in the form of displaced vertices (DVs). Due to its large size and shielding provided by more inward detector systems, the ATLAS muon spectrometer (MS) is a powerful tool for such DV searches.
This talk will introduce the strategies used in reconstructing and selecting vertices from long-lived particles decaying into hadronic jets in the MS with displacements between 3 m and 14 m from the primary interaction vertex. World-leading exclusion limits obtained from Run 2 proton-proton collision data are highlighted, and the current developments for the Run 3 iteration are summarised. Further, an outlook on work regarding overhauling the vertexing algorithm is presented.