Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
Publisher
DOI
10.1007/JHEP11(2020)005
Journal
JOURNAL OF HIGH ENERGY PHYSICS
Issue
ISSN
1029-8479
Metadata
Show full item recordAbstract
A search for new physics with non-resonant signals in dielectron and dimuon final states in the mass range above 2 TeV is presented. This is the first search for non-resonant signals in dilepton final states at the LHC to use a background estimate from the data. The data, corresponding to an integrated luminosity of 139 fb−1, were recorded by the ATLAS experiment in proton-proton collisions at a center-of-mass energy of 𝑠√
s
= 13 TeV during Run 2 of the Large Hadron Collider. The benchmark signal signature is a two-quark and two-lepton contact interaction, which would enhance the dilepton event rate at the TeV mass scale. To model the contribution from background processes a functional form is fit to the dilepton invariant-mass spectra in data in a mass region below the region of interest. It is then extrapolated to a high-mass signal region to obtain the expected background there. No significant deviation from the expected background is observed in the data. Upper limits at 95% CL on the number of events and the visible cross-section times branching fraction for processes involving new physics are provided. Observed (expected) 95% CL lower limits on the contact interaction energy scale reach 35.8 (37.6) TeV.
Authors
Aaboud, M; Aad, G; Abbott, B; Abdinov, O; Abeloos, B; Abhayasinghe, DK; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, HCollections
- Particle Physics [971]
Licence information
Copyright statements
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as 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.
Related items
Showing items related by title, author, creator and subject.
-
Combinations of single-top-quark production cross-section measurements and vertical bar f(LV)V(tb)vertical bar determinations at root s=7 and 8 TeV with the ATLAS and CMS experiments
Aaboud, M; Aad, G; Abbott, B; Abbott, DC; Abdinov, O; Abud, AA; Abhayasinghe, DK; Abidi, SH; AbouZeid, OS; Abraham, NL (2019-05-16) -
Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV
Aad, G; Abbott, B; Abbott, DC; Abud, AA; Abeling, K; Abhayasinghe, DK; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, H (2020-08-12) -
Combination of inclusive and differential t(t)over-bar charge asymmetry measurements using ATLAS and CMS data at root S=7 and 8 TeV
Aaboud, MY; Aad, G; Abbott, B; Abdinov, O; Abeloos, B; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, H; Abreu, H (2018-04-09)