Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector Aad, G. Aguilar Saavedra, Juan Antonio Atlas Collaboration Hadron-Hadron scattering (experiments) 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 nonresonant 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. 2021-02-11T08:42:32Z 2021-02-11T08:42:32Z 2020 info:eu-repo/semantics/article The ATLAS collaboration., Aad, G., Abbott, B. et al. Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector. J. High Energ. Phys. 2020, 5 (2020). https://doi.org/10.1007/JHEP11(2020)005 http://hdl.handle.net/10481/66456 10.1007/JHEP11(2020)005 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España SPRINGER