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Scientific article
Open access
English

Search for lepton-flavour violation in high-mass dilepton final states using 139 fb$^{−1}$ of pp collisions at $ \sqrt{s} $ = 13 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 2023, 82
Publication date2023
First online date2023-10-13
Abstract

A search is performed for a heavy particle decaying into different-flavour, dilepton final states, using 139 fb$^{−1}$ of proton-proton collision data at $ \sqrt{s} $ = 13 TeV collected in 2015–2018 by the ATLAS detector at the Large Hadron Collider. Final states with electrons, muons and hadronically decaying tau leptons are considered (eμ, eτ or μτ). No significant excess over the Standard Model predictions is observed. Upper limits on the production cross-section are set as a function of the mass of a Z′ boson, a supersymmetric τ-sneutrino, and a quantum black-hole. The observed 95% CL lower mass limits obtained on a typical benchmark model Z′ boson are 5.0 TeV (eμ), 4.0 TeV (eτ), and 3.9 TeV (μτ), respectively.

eng
Keywords
  • Beyond Standard Model
  • Exotics
  • Flavour Physics
  • Hadron-Hadron Scattering
  • P p: colliding beams
  • Dilepton: final state
  • Z': leptonic decay
  • Tau: hadronic decay
  • Z': mass
  • Mass: lower limit
  • Stau: mass
  • Z': model
  • Particle: heavy
  • Black hole: quantum
  • P p: scattering
  • Lepton: flavor: violation
  • Dilepton: mass spectrum
  • ATLAS
  • Muon
  • Benchmark
  • Electron
  • CERN LHC Coll
  • Supersymmetry: parameter space
  • Channel cross section: upper limit
  • Mass dependence
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Search for lepton-flavour violation in high-mass dilepton final states using 139 fb$^{−1}$ of pp collisions at $ \sqrt{s} $ = 13 TeV with the ATLAS detector. In: The journal of high energy physics, 2023, vol. 2023, p. 82. doi: 10.1007/jhep10(2023)082
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Article (Published version)
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ISSN of the journal1029-8479
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