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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

Aad G.
•
Abbott B.
•
Abbott D. C.
altro
Zwalinski L.
2023
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
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<15 GeV. For the first time, limits are given for both single-flavor and multiflavor mixing scenarios motivated by neutrino flavor oscillation results for both the normal and inverted neutrino-mass hierarchies.
DOI
10.1103/PhysRevLett.131.061803
Archivio
https://hdl.handle.net/11390/1259584
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85173626178
https://ricerca.unityfvg.it/handle/11390/1259584
Diritti
open access
google-scholar
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