Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-58840
CMS Collaboration, including the following authors; Amsler, C; Chiochia, V; Snoek, H; Verzetti, M; Favaro, C; Aguiló, E; De Visscher, S; Otyugova, P; Schmitt, A; Millan, B; Ivova, M; Storey, J (2011). A search for excited leptons in pp Collisions at √s = 7 TeV. Physics Letters B, 704(3):143-162.
A search for excited leptons is carried out with the CMS detector at the LHC, using 36 inverse picobarns of pp collision data recorded at sqrt(s) = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp to l l*, followed by the decay l* to l gamma, resulting in the l l gamma final state, where l = electron or muon. 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 Lambda and excited lepton mass M(l*) parameter space is extended beyond previously established limits. For Lambda = M(l*), excited lepton masses are excluded below 1070 GeV/c^2 for e* and 1090 GeV/c^2 for mu* at the 95% confidence level.
|Other titles:||A search for excited leptons in pp Collisions at sqrt(s) = 7 TeV|
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Physics Institute|
|Deposited On:||13 Feb 2012 10:28|
|Last Modified:||07 Dec 2012 11:43|
|ISSN:||0370-2693 (P) 1873-2445 (E)|
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