Search for non-resonant signatures of extra dimensions in high-mass dilepton final states in 139 fb$^{-1}$ of $pp$ collisions at $\sqrt {s}$=13 TeV using the ATLAS detector

ATLAS Collaboration

Report

PUBDB-2021-05346

Search for non-resonant signatures of extra dimensions in high-mass dilepton final states in 139 fb$^{-1}$ of $pp$ collisions at $\sqrt {s}$=13 TeV using the ATLAS detector

ATLAS Collaboration (Collaboration author)DESY*

2021

14 pp. (2021) [10.3204/PUBDB-2021-05346]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2021-05346

Report No.: ATL-PHYS-PUB-2021-021

Abstract: 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 % credibility level for the electron and muon channel respectively in the GRW convention.

Keyword(s): p p: colliding beams ; new physics: search for ; scale: string ; dimuon: final state ; dilepton: final state ; p p: scattering ; muon: pair production ; electron: pair production ; space-time: higher-dimensional ; dilepton: mass spectrum ; mass spectrum: (electron positron) ; mass spectrum: (muon+ muon-) ; CERN LHC Coll ; ATLAS ; statistical analysis ; lower limit ; data analysis method ; experimental results ; 13000 GeV-cms ; upper limit ; Extra Dimensions ; Exotics ; Non-resonant ; Dilepton ; EXOTICS

Note: 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!

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