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Title: Search for Heavy Neutral Leptons in Decays of W Bosons Using a Dilepton Displaced Vertex in Formula Presented Collisions with the ATLAS Detector [2]
Authors: Filmer, E.K.
Jackson, P.
Kong, A.X.Y.
Potti, H.
Ruggeri, T.A.
Sharma, A.S.
Ting, E.X.L.
Keywords: Bosons
Germanium alloys
Germanium compounds
Particle detectors
Tellurium compounds
ATLAS detectors
Charged leptons
Flavor oscillations
Large Hadron Collider
Large-hadron colliders
Mixing parameters
Neutrino mass
W bosons
Issue Date: 2023
Publisher: American Physical Society
Abstract: A search for a long-lived, heavy neutral lepton ( N ) in 139 fb - 1 of s = 13 TeV p p collision data collected by the ATLAS detector at the Large Hadron Collider is reported. The N is produced via W → N μ or W → N e 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 < m N < 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. © 2023 CERN, for the ATLAS Collaboration.
ISSN: 0031-9007
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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