Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/9388
Title: Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
Authors: Aad, G.
Abbott, B.
Abbott, D. C.
Abud, A.
Abeling, K.
Abhayasinghe, D. K.
Bourdarios, Adam C.
Keywords: Hadron-Hadron scattering (experiments)
Parton Distributions
Monte-Carlo
Resonance
Decay
Issue Date: 2020
Publisher: Springer
Abstract: 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 root 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.
URI: https://doi.org/10.1007/JHEP11(2020)005
https://hdl.handle.net/20.500.11851/9388
ISSN: 1029-8479
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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