Search for massive long-lived particles with large ionization signatures

Various theories beyond the Standard Model (SM) propose different solutions to address several open questions in particle physics, predicting particles with lifetimes that are long compared to SM particles. When produced at particle collider experiments such as the Large Hadron Collider (LHC) at CERN, these long-lived particles (LLPs) can travel a long distance before they decay. Their signatures are unique and require special reconstruction techniques. This talk presents a search for exotic massive and charged LLPs that deposits a large ionization within the silicon tracker of the CMS experiment. The search uses data from proton-proton collisions produced at the LHC in 2017 and 2018.