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Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at √s=13  TeV

Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at √s=13  TeV
Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at √s=13  TeV
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 35.9  fb−1. 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 VℓN is the matrix element describing the mixing of N with the standard model neutrino of flavor ℓ. 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.
1079-7114
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, Alexander , The CMS Collaboration (2018) Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at √s=13  TeV. Physical Review Letters, 120. (doi:10.1103/PhysRevLett.120.221801).

Record type: Article

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 35.9  fb−1. 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 VℓN is the matrix element describing the mixing of N with the standard model neutrino of flavor ℓ. 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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e-pub ahead of print date: 29 May 2018
Published date: 29 May 2018

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Local EPrints ID: 421564
URI: https://eprints.soton.ac.uk/id/eprint/421564
ISSN: 1079-7114
PURE UUID: f39c5fd8-ef56-498b-8f60-523cab3607a6
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 15 Jun 2018 16:30
Last modified: 15 Mar 2019 01:33

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Author: Alexander Belyaev ORCID iD

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