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Type: Journal article
Title: Search for excited electrons singly produced in proton–proton collisions at √s = 13Te with the ATLAS experiment at the LHC
Other Titles: Search for excited electrons singly produced in proton-proton collisions at root s = 13Te with the ATLAS experiment at the LHC
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abbott, D.
Abdinov, O.
Abeloos, B.
Abhayasinghe, D.
Abidi, S.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.
Adachi, S.
Adam, L.
Bourdarios, C.
Adamczyk, L.
Adamek, L.
Adelman, J.
et al.
Citation: European Physical Journal C, 2019; 79(9):803-1-803-30
Publisher: Springer Nature
Issue Date: 2019
ISSN: 1434-6044
Statement of
M. Aaboud … A. Duvnjak … P. Jackson … J.L. Oliver … A. Petridis … A. Qureshi … A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration]
Abstract: A search for excited electrons produced in pp collisions at s√ = 13 TeV via a contact interaction qq¯→ee* is presented. The search uses 36.1 fb⁻¹ of data collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider. Decays of the excited electron into an electron and a pair of quarks (eqq¯) are targeted in final states with two electrons and two hadronic jets, and decays via a gauge interaction into a neutrino and a W boson (νW) are probed in final states with an electron, missing transverse momentum, and a large-radius jet consistent with a hadronically decaying W boson. No significant excess is observed over the expected backgrounds. Upper limits are calculated for the pp→ee*→eeqq¯ and pp→ee*→eνW production cross sections as a function of the excited electron mass me* at 95% confidence level. The limits are translated into lower bounds on the compositeness scale parameter Λ of the model as a function of me*. For me*<0.5 TeV, the lower bound for Λ is 11 TeV. In the special case of me*=Λ, the values of me∗<4.8 TeV are excluded. The presented limits on Λ are more stringent than those obtained in previous searches.
Rights: © CERN for the benefit of the ATLAS collaboration 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP³.
RMID: 1000002082
DOI: 10.1140/epjc/s10052-019-7295-1
Appears in Collections:Physics publications

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