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Type: Journal article
Title: Search for high-mass dilepton resonances using 139 fb⁻¹ of pp collision data collected at √s = 13 TeV with the ATLAS detector
Other Titles: Search for high-mass dilepton resonances using 139 fb(-1) of pp collision data collected at root s = 13 TeV with the ATLAS detector
Author: Aad, G.
Abbott, B.
Abbott, D.
Abdinov, O.
Abed Abud, A.
Abeling, K.
Abhayasinghe, D.
Abidi, S.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.
Achkar, B.
Adachi, S.
Adam, L.
Adam Bourdarios, C.
Adamczyk, L.
Adamek, L.
et al.
Citation: Physics Letters B, 2019; 796:68-87
Publisher: Elsevier
Issue Date: 2019
ISSN: 0370-2693
Statement of
G. Aad … A. Duvnjak … P. Jackson … J.L. Oliver … A. Petridis … A. Qureshi … A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration]
Abstract: A search for high-mass dielectron and dimuon resonances in the mass range of 250 GeV to 6 TeV is presented. The data were recorded by the ATLAS experiment in proton–proton collisions at a centre-of-mass energy of √s = 13 TeV during Run 2 of the Large Hadron Collider and correspond to an integrated luminosity of 139 fb⁻¹. A functional form is fitted to the dilepton invariant-mass distribution to model the contribution from background processes, and a generic signal shape is used to determine the significance of observed deviations from this background estimate. No significant deviation is observed and upper limits are placed at the 95% confidence level on the fiducial cross-section times branching ratio for various resonance width hypotheses. The derived limits are shown to be applicable to spin-0, spin-1 and spin-2 signal hypotheses. For a set of benchmark models, the limits are converted into lower limits on the resonance mass and reach 4.5 TeV for the E₆-motivated Z'ψ boson. Also presented are limits on Heavy Vector Triplet model couplings.
Rights: © 2019 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP³.
RMID: 0030130985
DOI: 10.1016/j.physletb.2019.07.016
Appears in Collections:Physics publications

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