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.

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Journal Article

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.

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Duke Authors

Cited Authors

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Published Date

  • January 2018

Published In

Volume / Issue

  • 78 / 7

Start / End Page

  • 565 -

PubMed ID

  • 30395135

Pubmed Central ID

  • 30395135

Electronic International Standard Serial Number (EISSN)

  • 1434-6052

International Standard Serial Number (ISSN)

  • 1434-6044

Digital Object Identifier (DOI)

  • 10.1140/epjc/s10052-018-5995-6

Language

  • eng