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|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|
|Citation:||European Physical Journal C, 2019; 79(9):803-1-803-30|
|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 (http://creativecommons.org/licenses/by/4.0/), 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.|
|Appears in Collections:||Physics publications|
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