• Open Access

Search for Heavy Neutral Leptons in Events with Three Charged Leptons in Proton-Proton Collisions at s=13TeV

A. M. Sirunyan et al. (CMS Collaboration)
Phys. Rev. Lett. 120, 221801 – Published 29 May 2018
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Abstract

A search for a heavy neutral lepton N of Majorana nature decaying into a W boson and a charged lepton is performed using the CMS detector at the LHC. The targeted signature consists of three prompt charged leptons in any flavor combination of electrons and muons. The data were collected in proton-proton collisions at a center-of-mass energy of 13 TeV, with an integrated luminosity of 35.9fb1. The search is performed in the N mass range between 1 GeV and 1.2 TeV. The data are found to be consistent with the expected standard model background. Upper limits are set on the values of |VeN|2 and |VμN|2, where VN is the matrix element describing the mixing of N with the standard model neutrino of flavor . These are the first direct limits for N masses above 500 GeV and the first limits obtained at a hadron collider for N masses below 40 GeV.

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  • Received 8 February 2018

DOI:https://doi.org/10.1103/PhysRevLett.120.221801

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.

© 2018 CERN, for the CMS Collaboration

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Vol. 120, Iss. 22 — 1 June 2018

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