Search for new physics with multileptons and jets in $35.9~\mathrm{fb}^{-1}$ of pp collision data at $\sqrt{s}=13~\mathrm{TeV}$

A search for new physics is carried out in events with at least 3 electrons or muons and jets. Results are based on the sample of $35.9~\mathrm{fb}^{-1}$ of proton-proton collision data produced by the LHC at a center-of-mass energy of 13 TeV and collected by the CMS experiment. Events are classified according to the number of b jets, missing transverse momentum, hadronic transverse energy, and the invariant mass of opposite-charge, same-flavor dilepton pairs. No significant excess above the standard model background expectation is observed. The results are interpreted using simplified models of supersymmetry. Exclusion limits are set in the context of four different simplified supersymmetric models with pair production of gluino or 3$^\text{rd}$ generation squarks. In a model with gluino pair production, with subsequent decay into a top quark-antiquark pair and a neutralino, gluinos with masses smaller than 1610 GeV are excluded for light neutralinos. In a model with pair of bottom squarks production, the masses of sbottoms are excluded up to 840 GeV for light charginos.