Search for Heavy Neutral Leptons in Decays of W Bosons Using a Dilepton Displaced Vertex in sqrt[s]=13  TeV pp Collisions with the ATLAS Detector

G. Aad, T.P.A. Åkesson, E.E. Corrigan, C. Doglioni, J. Geisen, E. Hansen, V. Hedberg, G. Jarlskog, B. Konya, E. Lytken, K.H. Mankinen, C. Marcon, J.U. Mjörnmark, G.A. Mullier, R. Poettgen, N.D. Simpson, E. Skorda, O. Smirnova, L. Zwalinski, ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

A search for a long-lived, heavy neutral lepton (N) in 139  fb^{-1} of sqrt[s]=13  TeV pp collision data collected by the ATLAS detector at the Large Hadron Collider is reported. The N is produced via W→Nμ or W→Ne and decays into two charged leptons and a neutrino, forming a displaced vertex. The N mass is used to discriminate between signal and background. No signal is observed, and limits are set on the squared mixing parameters of the N with the left-handed neutrino states for the N mass range 3  GeV
Original languageEnglish
Article number061803
JournalPhysical Review Letters
Volume131
Issue number6
DOIs
Publication statusPublished - 2023

Subject classification (UKÄ)

  • Subatomic Physics

Free keywords

  • article
  • boson
  • flavor
  • hadron
  • left handedness
  • lepton
  • neutrino
  • oscillation

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