s = 13 TeV ]]>

摘要

AbstractA search for physics beyond the standard model in the final state with two same-flavour leptons (electrons or muons) and two quarks produced in proton–proton collisions ats=13TeVis presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of2.3fb?1. The observed data are in good agreement with the standard model background prediction. The results of the measurement are interpreted in the framework of a recently proposed model in which a heavy Majorana neutrino,N?, stems from a composite-fermion scenario. Exclusion limits are set for the first time on the mass of the heavy composite Majorana neutrino,mN?, and the compositenes