%0 Report %T Search for non-resonant signatures of extra dimensions in high-mass dilepton final states in 139 fb<sup>−1</sup> of pp collisions at √s=13 TeV using the ATLAS detector %N ATL-PHYS-PUB-2021-021 %M PUBDB-2021-05346 %M ATL-PHYS-PUB-2021-021 %P 14 %D 2021 %Z All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PUBNOTES/ATL-PHYS-PUB-2021-021. The authors list may be incomplete! %X A search is presented for physics non-resonant new phenomena in dielectron and dimuon final states, originating from large extra spatial dimensions. The LHC proton-proton collision dataset collected by the ATLAS detector between 2015 and 2018 is analyzed, corresponding to a total integrated luminosity of up to 139 fb^-1 at p s = 13 TeV. The dilepton invariant mass spectrum is a discriminating variable. No significant deviations from the Standard Model expectation are observed. Lower limits are set on the string scale M_S between 6.6 TeV and 6.4 TeV at the 95 %K p p: colliding beams (INSPIRE) %K new physics: search for (INSPIRE) %K scale: string (INSPIRE) %K dimuon: final state (INSPIRE) %K dilepton: final state (INSPIRE) %K p p: scattering (INSPIRE) %K muon: pair production (INSPIRE) %K electron: pair production (INSPIRE) %K space-time: higher-dimensional (INSPIRE) %K dilepton: mass spectrum (INSPIRE) %K mass spectrum: (electron positron) (INSPIRE) %K mass spectrum: (muon+ muon-) (INSPIRE) %K CERN LHC Coll (INSPIRE) %K ATLAS (INSPIRE) %K statistical analysis (INSPIRE) %K lower limit (INSPIRE) %K data analysis method (INSPIRE) %K experimental results (INSPIRE) %K 13000 GeV-cms (INSPIRE) %K upper limit (INSPIRE) %K Extra Dimensions (autogen) %K Exotics (autogen) %K Non-resonant (autogen) %K Dilepton (autogen) %K EXOTICS (autogen) %F PUB:(DE-HGF)29 %9 Report %R 10.3204/PUBDB-2021-05346 %U https://bib-pubdb1.desy.de/record/472937