文摘
A search for excited leptons is carried out with the CMS detector at the LHC, using of pp collision data recorded at . The search is performed for associated production of a lepton and an oppositely charged excited lepton , followed by the decay , resulting in the mlns="""">??¦Ã final state, where . No excess of events above the standard model expectation is observed. Interpreting the findings in the context of production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for production at this collision energy. The exclusion region in the compositeness scale mlns="""">¦« and excited lepton mass parameter space is extended beyond previously established limits. For , excited lepton masses are excluded below for and for at the 95 % confidence level.
