Search for t¯t resonances in fully hadronic final states in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications, T.M. Carter, M. Faucci Giannelli, A. Hasib, M.P. Heath, S. Palazzo, A. Søgaard, A. Strubig, E.P. Takeva, A.J. Taylor, N. Themistokleous, E.M. Villhauer

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This paper presents a search for new heavy particles decaying into a pair of top
quarks using 139 fb−1 of proton-proton collision data recorded at a centre-of-mass energy of √s = 13 TeV with the ATLAS detector at the Large Hadron Collider. The search is performed using events consistent with pair production of high-transverse-momentum top quarks and their subsequent decays into the fully hadronic final states. The analysis is optimized for resonances decaying into a t¯t pair with mass above 1.4 TeV, exploiting a dedicated multivariate technique with jet substructure to identify hadronically decaying
top quarks using large-radius jets and evaluating the background expectation from data. No significant deviation from the background prediction is observed. Limits are set on the production cross-section times branching fraction for the new Z′ boson in a topcolor-assisted-technicolor model. The Z′ boson masses below 3.9 and 4.7 TeV are excluded at 95% confidence level for the decay widths of 1% and 3%, respectively.
Original languageEnglish
Article number61
Pages (from-to)1-42
Number of pages42
Journal Journal of High Energy Physics
Volume2020
Issue number10
DOIs
Publication statusPublished - 9 Oct 2020

Keywords / Materials (for Non-textual outputs)

  • Jet substructure
  • Beyond Standard Model
  • Hadron-Hadron scattering (experiments0
  • Heavy quark production
  • Jets

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