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

Summary, in English

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

• Author: 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
• Department/s: Particle and nuclear physics; eSSENCE: The e-Science Collaboration; Lithosphere and Biosphere Science
• Publishing year: 2023
• Language: English
• Publication/Series: Physical Review Letters
• Volume: 131
• Issue: 6
• Links: http://dx.doi.org/10.1103/PhysRevLett.131.061803
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Keywords: article; boson; flavor; hadron; left handedness; lepton; neutrino; oscillation
• Status: Published
• ISBN/ISSN/Other: ISSN: 1079-7114