Franconi, Laura; Haug, Sigve; Weber, Michele; Anders, John Kenneth; Fehr, Armin; Beck, Hans Peter; Ereditato, Antonio; Lehmann, Niklaus; Miucci, Antonio; Weston, Thomas Daniel (2020). Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector. Journal of High Energy Physics, 2020(11) Springer 10.1007/JHEP11(2020)005
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Aad2020_Article_SearchForNewNon-resonantPhenom.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (2MB) | Preview |
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√ = 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.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 08 Faculty of Science > Physics Institute |
UniBE Contributor: |
Franconi, Laura, Haug, Sigve, Weber, Michele, Anders, John Kenneth, Ilg, Armin, Beck, Hans Peter, Ereditato, Antonio, Lehmann, Niklaus, Miucci, Antonio, Weston, Thomas Daniel |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
20 Apr 2021 16:26 |
Last Modified: |
02 Mar 2023 23:34 |
Publisher DOI: |
10.1007/JHEP11(2020)005 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt |
BORIS DOI: |
10.48350/155555 |
URI: |
https://boris.unibe.ch/id/eprint/155555 |
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