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



Aad, G, Abbott, B, Abbott, DC, Abeling, K, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC
et al (show 2889 more authors) (2023) Search for Heavy Neutral Leptons in Decays of W Bosons Using a Dilepton Displaced Vertex in p s=13 TeV pp Collisions with the ATLAS Detector PHYSICAL REVIEW LETTERS, 131 (6). 061803-. ISSN 0031-9007, 1079-7114

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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.

Item Type: Article
Uncontrolled Keywords: ATLAS Collaboration
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 29 Aug 2023 08:12
Last Modified: 23 May 2026 07:46
DOI: 10.1103/PhysRevLett.131.061803
Open Access URL: https://journals.aps.org/prl/abstract/10.1103/Phys...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3172372
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