Publication
Title
Search for Z′ bosons decaying to pairs of heavy Majorana neutrinos in proton-proton collisions at √s=13 TeV
Author
Institution/Organisation
CMS Collaboration
Abstract
A search for the production of pairs of heavy Majorana neutrinos (N-& ell;) from the decays of Z ' bosons is performed using the CMS detector at the LHC. The data were collected in proton-proton collisions at a center-of-mass energy of root s = 13 TeV, with an integrated luminosity of 138 fb(-1). The signature for the search is an excess in the invariant mass distribution of the final-state objects, two same-flavor leptons (e or mu) and at least two jets. No significant excess of events beyond the expected background is observed. Upper limits at 95% confidence level are set on the product of the Z ' production cross section and its branching fraction to a pair of N-& ell;, as functions of N-& ell; and Z ' boson masses (m(N & ell;) and m(Z '), respectively) for m(Z ') from 0.4 to 4.6 TeV and m(N & ell;) from 0.1 TeV to m(Z ')/2. In the theoretical framework of a left-right symmetric model, exclusion bounds in the m(N & ell;)-m(Z ') plane are presented in both the electron and muon channels. The observed upper limit on m(Z ') reaches up to 4.42 TeV. These are the most restrictive limits to date on the mass of N as a function of the Z ' boson mass.
Language
English
Source (journal)
Journal of high energy physics. - Bristol
Publication
Bristol : 2023
ISSN
1126-6708
1029-8479 [online]
DOI
10.1007/JHEP11(2023)181
Volume/pages
11 (2023) , p. 1-44
Article Reference
181
ISI
001116685900001
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
AMVA4NewPhysics: Advanced Multi-Variate Analysis for New Physics Searches at the LHC
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 01.02.2024
Last edited 07.02.2024
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