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https://hdl.handle.net/2440/129593
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Type: | Journal article |
Title: | Search for tt¯ resonances in fully hadronic final states in pp collisions at √s = 13 TeV with the ATLAS detector |
Other Titles: | Search for tt -bar resonances in fully hadronic final states in pp collisions at root s = 13 TeV with the ATLAS detector |
Author: | Aad, G. Abbott, B. Abbott, D.C. Abed Abud, A. Abeling, K. Abhayasinghe, D.K. Abidi, S.H. AbouZeid, O.S. Abraham, N.L. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B.S. Achkar, B. Adam, L. Adam Bourdarios, C. Adamczyk, L. Adamek, L. Adelman, J. Adersberger, M. et al. |
Citation: | The Journal of High Energy Physics, 2020; 2020(10):061-1-061-42 |
Publisher: | Springer Nature |
Issue Date: | 2020 |
ISSN: | 1029-8479 1029-8479 |
Statement of Responsibility: | G. Aad … D. Duvnjak … P. Jackson … A.X.Y. Kong … J.L. Oliver … A. Petridis … A. Qureshi … A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration] |
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. |
Keywords: | Jet substructure; beyond Standard Model; hadron-hadron scattering (experiments); heavy quark production; jets |
Rights: | Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP³. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
DOI: | 10.1007/JHEP10(2020)061 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1007/jhep10(2020)061 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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hdl_129593.pdf | Published Version | 1.61 MB | Adobe PDF | View/Open |
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