Abstract
A search for long-lived, massive particles predicted by many theories beyond the Standard
Model is presented. The search targets final states with large missing transverse momentum and at
least one high-mass displaced vertex with five or more tracks, and uses 32.8 fb−1 of
√s = 13 TeV pp collision data collected by the ATLAS detector at the LHC. The observed
yield is consistent with the expected background. The results are used to extract 95% CL exclusion
limits on the production of long-lived gluinos with masses up to 2.37 TeV and lifetimes of
O(10−2)–O(10) ns in a simplified model inspired by Split Supersymmetry.