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Title: Search for Z′ bosons decaying to pairs of heavy Majorana neutrinos in proton-proton collisions at √<i>s</i> = 13 TeV
Other Titles: Search for Z' bosons decaying to pairs of heavy Majorana neutrinos in proton-proton collisions at $\sqrt{s}$ = 13 TeV
Authors: Tumasyan, A
Adam, W
Andrejkovic, JW
Bergauer, T
Chatterjee, S
Damanakis, K
Dragicevic, M
Escalante Del Valle, A
Hussain, PS
Jeitler, M
Krammer, N
Wezenbeek, L
Benecke, A
Bruno, G
Bury, F
Caputo, C
David, P
Delaere, C
Donertas, IS
Giammanco, A
Jaffel, K
Jain, S
Lemaitre, V
Mondal, K
Prisciandaro, J
Taliercio, A
Tran, TT
Vischia, P
Wertz, S
Alves, GA
Coelho, E
Hensel, C
Moraes, A
Rebello Teles, P
Aldá Júnior, WL
Alves Gallo Pereira, M
Barroso Ferreira Filho, M
Brandao Malbouisson, H
Carvalho, W
Chinellato, J
Da Costa, EM
Da Silveira, GG
Coldham, K
Cole, JE
Khan, A
Kyberd, P
Reid, ID
CMS Collaboration
Lechner, L
Liko, D
Mikulec, I
Paulitsch, P
Pitters, FM
Schieck, J
Schöfbeck, R
Schwarz, D
Templ, S
Waltenberger, W
Wulz, CE
Darwish, MR
Janssen, T
Kello, T
Rejeb Sfar, H
Van Mechelen, P
Bols, ES
D’Hondt, J
De Moor, A
Delcourt, M
El Faham, H
Lowette, S
Moortgat, S
Morton, A
Müller, D
Sahasransu, AR
Tavernier, S
Van Doninck, W
Vannerom, D
Clerbaux, B
De Lentdecker, G
Favart, L
Hohov, D
Jaramillo, J
Lee, K
Mahdavikhorrami, M
Makarenko, I
Malara, A
Paredes, S
Pétré, L
Postiau, N
Starling, E
Thomas, L
Vanden Bemden, M
Vander Velde, C
Vanlaer, P
Dobur, D
Knolle, J
Lambrecht, L
Mestdach, G
Niedziela, M
Rendón, C
Roskas, C
Samalan, A
Skovpen, K
Tytgat, M
Van Den Bossche, N
Vermassen, B
Keywords: beyond standard model;hadron-hadron scattering
Issue Date: 24-Nov-2023
Publisher: Springer Nature on behalf of SISSA
Citation: Tumasyan, A. et al. on behalf of the CMS Collaboration (2023) 'Search for Z′ bosons decaying to pairs of heavy Majorana neutrinos in proton-proton collisions at √<i>s</i> = 13 TeV', Journal of High Energy Physics, 2023 (11), 181, pp. 1 - 43. doi: 10.1007/JHEP11(2023)181.
Abstract: A search for the production of pairs of heavy Majorana neutrinos (Nℓ) 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 √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 μ) 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 Nℓ, as functions of Nℓ and Z' boson masses (mNℓ and mZ′, respectively) for mZ′ from 0.4 to 4.6 TeV and mNℓ from 0.1 TeV to mZ′/2. In the theoretical framework of a left-right symmetric model, exclusion bounds in the mNℓ−mZ′ plane are presented in both the electron and muon channels. The observed upper limit on mZ′ reaches up to 4.42 TeV. These are the most restrictive limits to date on the mass of Nℓ as a function of the Z' boson mass.
Description: A preprint version of the article is available at arXiv:2307.06959v2 [hep-ex], . Comments: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at (CMS Public Pages). Report number: CMS-EXO-20-006, CERN-EP-2023-115.
ISSN: 1126-6708
Other Identifiers: ORCiD: A. Tumasyan
ORCiD: Joanne E. Cole
ORCiD: Akram Khan
ORCiD: Paul Kyberd
ORCiD: Ivan D. Reid
arXiv:2307.06959v2 [hep-ex]
Appears in Collections:Dept of Electronic and Electrical Engineering Research Papers

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