Search for excited electrons singly produced in proton–proton collisions at √ s = 13 TeV with the ATLAS experiment at the LHC Aaboud, M. Aguilar Saavedra, Juan Antonio Atlas Collaboration 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. 2019-10-31T11:30:03Z 2019-10-31T11:30:03Z 2019-09-26 info:eu-repo/semantics/article Aaboud, M., Kupco, A., Webb, S., Dreyer, T., Wang, Y., Jakobs, K., ... & Schovancova, J. (2019). Search for excited electrons singly produced in proton-proton collisions at $\sqrt {s}= 13$ TeV with the ATLAS experiment at the LHC (No. arXiv: 1906.03204). ATLAS-EXOT-2017-22-003. http://hdl.handle.net/10481/57640 10.1140/epjc/s10052-019-7295-1 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Springer Nature