engleski

Search for new physics in top quark production in dilepton final states in proton-proton collisions at root s=13 TeV

A search for new physics in top quark production is performed in proton-proton collisions at 13 TeV. The data set corresponds to an integrated luminosity of 35.9 fb(-1) collected in 2016 with the CMS detector. Events with two opposite-sign isolated leptons (electrons or muons), and b quark jets in the final state are selected. The search is sensitive to new physics in top quark pair production and in single top quark production in association with a W boson. No significant deviation from the standard model expectation is observed. Results are interpreted in the framework of effective field theory and constraints on the relevant effective couplings are set, one at a time, using a dedicated multivariate analysis. This analysis differs from previous searches for new physics in the top quark sector by explicitly separating tW from t (t) over bar events and exploiting the specific sensitivity of the tW process to new physics.

High energy physics ; Experimental particle physics ; LHC ; CMS ; Physics ; Beyond two generations ; Excited top quark ; Hadron-Hadron scattering (experiments) ; Supersymmetry ; Beyond Standard Model ; Lepton production ; Data acquisition concepts ; Detector control systems (detector and experiment monitoring and slow-control systems, architecture, hardware, algorithms, databases) ; Modular electronics ; Optical detector readout concepts ; Particle Physics Experiments ; Data ; Higgs ; Muon

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