Title
A search for excited leptons in pp collisions at <tex>$\sqrt{s}$</tex> = 7 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
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→&#8467;&#8467;&#8270;, followed by the decay &#8467;&#8270;→&#8467;γ, resulting in the &#8467;&#8467;γ final state, where &#8467;=e,μ. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of &#8467;&#8270; production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for &#8467;&#8270; production at this collision energy. The exclusion region in the compositeness scale Λ and excited lepton mass M&#8467;&#8270; parameter space is extended beyond previously established limits. For Λ=M&#8467;&#8270;, excited lepton masses are excluded below 1070 GeV/c2 for e&#8270; and 1090 GeV/c2 for μ&#8270; at the 95% confidence level.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/d50dc4/52e3d752.pdf
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