Search for t(t)over-bar resonances in fully hadronic final states in pp collisions at √s=13 TeV with the ATLAS detector



Aad, G, Abbott, B, Abbott, DC, Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2944 more authors) (2020) Search for t(t)over-bar resonances in fully hadronic final states in pp collisions at √s=13 TeV with the ATLAS detector JOURNAL OF HIGH ENERGY PHYSICS, 2020 (10). 61-. ISSN 1029-8479, 1029-8479

Access the full-text of this item by clicking on the Open Access link.

Abstract

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 tt¯ 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. [Figure not available: see fulltext.]

Item Type: Article
Additional Information: 40 pages in total, author list starting page 24, 4 figures, 2 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2018-48/
Uncontrolled Keywords: Jet substructure, Beyond Standard Model, Hadron-Hadron scattering (experiments), Heavy quark production, Jets
Depositing User: Symplectic Admin
Date Deposited: 02 Nov 2020 11:26
Last Modified: 16 Jun 2026 08:45
DOI: 10.1007/JHEP10(2020)061
Open Access URL: https://link.springer.com/article/10.1007%2FJHEP10...
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3105908
Disclaimer: The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.