Search for excited electrons and muons in √s=8 TeV proton–proton collisions with the ATLAS detector
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Aad-2013-Search for excited e.pdf
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Author(s)
Taylor, Frank E.
Date Issued
September 2013
Journal
New Journal of Physics
Publisher
IOP Publishing
Citation
Aad, G, T Abajyan, B Abbott, J Abdallah, S Abdel Khalek, O Abdinov, R Aben, et al. “Search for excited electrons and muons in $\sqrt {s}=8$ TeV proton–proton collisions with the ATLAS detector.” New Journal of Physics 15, no. 9 (September 1, 2013): 093011.
Version
Final published version
Abstract
The ATLAS detector at the Large Hadron Collider is used to search for excited electrons and excited muons in the channel pp → ℓℓ* → ℓℓγ, assuming that excited leptons are produced via contact interactions. The analysis is based on 13 fb[superscript −1] of pp collisions at a centre-of-mass energy of 8 TeV. No evidence for excited leptons is found, and a limit is set at the 95% credibility level on the cross section times branching ratio as a function of the excited-lepton mass m[subscript ℓ*]. For m[subscript ℓ*] ≥ 0.8 TeV, the respective upper limits on σB(ℓ* → ℓγ) are 0.75 and 0.90 fb for the e* and μ* searches. Limits on σB are converted into lower bounds on the compositeness scale Λ. In the special case where Λ = m[subscript ℓ*], excited-electron and excited-muon masses below 2.2 TeV are excluded.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1088/1367-2630/15/9/093011
