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Search for physics beyond the standard model in events with jetsand two same-sign or at least three charged leptons inproton-proton collisions at√s=13 TeV

A data sample of events from proton-proton col-lisions with at least two jets, and two isolated same-sign orthree or more charged leptons, is studied in a search for signa-tures of new physics phenomena. The data correspond to anintegrated luminosity of 137 fb−1at a center-of-mass energyof 13 TeV, collected in 2016–2018 by the CMS experimentat the LHC. The search is performed using a total of 168 sig-nal regions defined using several kinematic variables. Theproperties of the events are found to be consistent with theexpectations from standard model processes. Exclusion lim-its at 95% confidence level are set on cross sections for thepair production of gluinos or squarks for various decay sce-narios in the context of supersymmetric models conservingor violating R parity. The observed lower mass limits are aslarge as 2.1 TeV for gluinos and 0.9 TeV for top and bottomsquarks. To facilitate reinterpretations, model-independentlimits are provided in a set of simplified signal regions.

High energy physics ; Experimental particle physics ; LHC ; CMS ; Particle Physics Experiments ; Physics ; Vector boson scattering ; Hadron-Hadron scattering (experiments) ; Supersymmetry ; Higgs physics ; Particle and resonance production ; B physics ; Particle correlations and fluctuations ; Quarkonium ; Elementary Particles and Fields ; Beyond Standard Model ; Jets ; QCD ; Top physics ; Diboson ; Electroweak ; CKM matrix ; Top quark ; Large detector-systems performance ; Pattern recognition

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