Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton–proton collisions at √ s = 13 TeV with the ATLAS detector Aaboud, M. Aguilar Saavedra, Juan Antonio Atlas Collaboration A search for new heavy particles that decay into top-quark pairs is performed using data collected from proton–proton collisions at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The integrated luminosity of the data sample is 36.1 fb−1. Events consistent with top-quark pair production are selected by requiring a single isolated charged lepton, missing transverse momentum and jet activity compatible with a hadronic top-quark decay. Jets identified as likely to contain b-hadrons are required to reduce the background from other Standard Model processes. The invariant mass spectrum of the candidate top-quark pairs is examined for local excesses above the background expectation. No significant deviations from the Standard Model predictions are found. Exclusion limits are set on the production cross-section times branching ratio for hypothetical Z bosons, Kaluza–Kein gluons and Kaluza–Klein gravitons that decay into top-quark pairs. 2020-11-26T12:17:07Z 2020-11-26T12:17:07Z 2018-07-09 journal article Aaboud, M., Aad, G., Abbott, B., Abeloos, B., Abidi, S. H., AbouZeid, O. S., ... & Acharya, B. S. (2018). Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton–proton collisions at $$\sqrt {s}= 13$$$$\text {TeV} $$ TeV with the ATLAS detector. The European Physical Journal C, 78(7), 565. [https://doi.org/10.1140/epjc/s10052-018-5995-6] http://hdl.handle.net/10481/64514 10.1140/epjc/s10052-018-5995-6 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Springer