Search for Long-Lived Particles via Muon Detector Shower at the CMS Experimen

We have searched for Long-Lived Particles (LLPs) that decays in the muon chambers in the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider with Run 3 Data. Long lived particles are predicted by many Beyond the Standard Model (BSM) theories, such as the Supersymmetry and Hidden Valley Models, and can serve as a viable candidate for the Dark Matters (DM). The search targets LLPs that decays and creating a muon chamber shower (MDS) at the CMS Experiment, characterized by a rechits in the muon detectors unmatched to muons or punch through jets. The search targets boosted LLPs associated with a high missing transversal momentum (MET) of greater than 200 GeV, with a large mass range of 7-55 GeV. We show the estimated sensitivity and convergences study this time.