Title A search for excited leptons in pp collisions at $\sqrt{s}$ = 7 TeV Author Chatrchyan, S. Khachatryan, V. Sirunyan, A. M. Bansal, S. de Wolf, E.A. Janssen, X. Mucibello, L. Roland, B. Rougny, R. Selvaggi, M. van Haevermaet, H. Van Mechelen, P. Van Remortel, N. et al. Faculty/Department Faculty of Sciences. Physics Publication type article Publication 2011 Amsterdam , 2011 Subject Physics Source (journal) Physics letters: B. - Amsterdam, 1967, currens Volume/pages 704(2011) :3 , p. 143-162 ISSN 0370-2693 ISI 000296305800007 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract A search for excited leptons is carried out with the CMS detector at the LHC, using 36 pb−1 of pp collision data recorded at View the MathML source. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp→ℓℓ⁎, followed by the decay ℓ⁎→ℓγ, resulting in the ℓℓγ final state, where ℓ=e,μ. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of ℓ⁎ production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for ℓ⁎ production at this collision energy. The exclusion region in the compositeness scale Λ and excited lepton mass Mℓ⁎ parameter space is extended beyond previously established limits. For Λ=Mℓ⁎, excited lepton masses are excluded below 1070 GeV/c2 for e⁎ and 1090 GeV/c2 for μ⁎ at the 95% confidence level. Full text (open access) https://repository.uantwerpen.be/docman/irua/d50dc4/52e3d752.pdf E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000296305800007&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000296305800007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000296305800007&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle