Collaboration, ATLAS
(2019)
Search for heavy neutral leptons in decays of $W$ bosons produced in 13
TeV $pp$ collisions using prompt and displaced signatures with the ATLAS
detector.
JHEP, 10 (10).
p. 265.
Abstract
The problems of neutrino masses, matter-antimatter asymmetry, and dark matter could be successfully addressed by postulating right-handed neutrinos with Majorana masses below the electroweak scale. In this work, leptonic decays of $W$ bosons extracted from 32.9 fb$^{-1}$ to 36.1 fb$^{-1}$ of 13 TeV proton-proton collisions at the LHC are used to search for heavy neutral leptons (HNLs) that are produced through mixing with muon or electron neutrinos. The search is conducted using the ATLAS detector in both prompt and displaced leptonic decay signatures. The prompt signature requires three leptons produced at the interaction point (either $\mu\mu e$ or $e e\mu$) with a veto on same-flavour opposite-charge topologies. The displaced signature comprises a prompt muon from the $W$ boson decay and the requirement of a dilepton vertex (either $\mu\mu$ or $\mu e$) displaced in the transverse plane by 4-300 mm from the interaction point. The search sets constraints on the HNL mixing to muon and electron neutrinos for HNL masses in the range 4.5-50 GeV.
| Item Type: | Article |
|---|---|
| Additional Information: | 44 pages in total, author list starting page 28, 6 figures, 6 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2017-26/ |
| Uncontrolled Keywords: | hep-ex, hep-ex |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 16 Dec 2019 09:32 |
| Last Modified: | 19 Jan 2023 00:12 |
| DOI: | 10.1007/JHEP10(2019)265 |
| Open Access URL: | https://link.springer.com/article/10.1007%2FJHEP10... |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3066603 |
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