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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 |
Authors: | ATLAS Collaboration; Álvarez Piqueras, D. ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Issue Date: | Sep-2019 |
Publisher: | Springer |
Citation: | European Physical Journal C 79: 803 (2019) |
Abstract: | A search for excited electrons produced in pp collisions at s = 13 Te via a contact interaction qq¯ → ee is presented. The search uses 36.1 fb 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 Te, the lower bound for Λ is 11 Te. In the special case of me∗=Λ, the values of me∗<4.8 Te are excluded. The presented limits on Λ are more stringent than those obtained in previous searches. |
Publisher version (URL): | http://dx.doi.org/10.1140/epjc/s10052-019-7295-1 |
URI: | http://hdl.handle.net/10261/208893 |
DOI: | 10.1140/epjc/s10052-019-7295-1 |
Identifiers: | doi: 10.1140/epjc/s10052-019-7295-1 issn: 1434-6052 |
Appears in Collections: | (IFIC) Artículos |
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