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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

ContributorsATLAS Collaboration
Collection
  • Open Access - SCOAP3
Publication date2018
Abstract

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.

Citation (ISO format)
ATLAS Collaboration. 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. In: The European Physical Journal. C, Particles and Fields, 2018, vol. 78, n° 7, p. 565. doi: 10.1140/epjc/s10052-018-5995-6
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Article (Published version)
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ISSN of the journal1434-6044
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Creation08/06/2018 8:23:39 AM
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