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

Date

2023

Authors

Aad, G.
Abbott, B.
Abbott, D.C.
Abed Abud, A.
Abeling, K.
Abhayasinghe, D.K.
Abidi, S.H.
Aboulhorma, A.
Abramowicz, H.
Abreu, H.

Editors

Advisors

Journal Title

Journal ISSN

Volume Title

Type:

Journal article

Citation

Physical Review Letters, 2023; 131(6):061803-1-061803-23

Statement of Responsibility

The Atlas Collaboration … G. Aad … E. K. Filmer … P. Jackson … A. X. Y. Kong … H. Potti … E. X. L. Ting … M. J. White … et al.

Conference Name

Abstract

A search for a long-lived, heavy neutral lepton (N ) in 139 fb−1 of √s = 13 TeV pp 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 < mN < 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.

School/Discipline

Dissertation Note

Provenance

Description

Access Status

Rights

© 2023 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3 .

License

Grant ID

Call number

Persistent link to this record