Searches for Long-lived Particles with Muon Detector Showers in the B-Parking Dataset

This talk will provide an overview of the developments made exploiting the search for long-lived particles (LLPs) using the muon detector showers (MDS) strategy. Some early results from Run 2 demonstrated the capability of using the CMS detector in a novel fashion to search for LLPs. By treating the muon sub-detector as a calorimeter, we are able to create a nearly background free region to search for LLPs. Searching for LLPs using MDSs have provided very stringent limits for the decay of neutral LLPs with large mean proper decay lengths; this method has since been applied using more information from the muon system to achieve even stronger limits. This method has been used to set the limits for multiple types of LLPs including heavy neutral leptons, LLPs produced from decays of the Higgs boson, and LLPs produced from the decay of vector like lepton. A recent result includes the search for long-lived particles produced in the decay of B-meson.