Search for heavy neutral leptons in B-meson decays



Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Abudinen, F, Ackernley, T, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C
et al (show 1175 more authors) (2026) Search for heavy neutral leptons in B-meson decays JOURNAL OF HIGH ENERGY PHYSICS, 2026 (3). 178-. ISSN 1126-6708, 1029-8479

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Abstract

A search for long-lived heavy neutral leptons produced in B-meson decays and decaying to a μ±π final state is performed with data collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb−1. The results are interpreted in both lepton-number-conserving and lepton-number-violating scenarios. No significant excess is observed. Constraints are placed on the squared mixing element |U<inf>μN</inf>|2 to the active muon neutrino, under the assumption that couplings to other lepton flavours are negligible, in the mass range of 1.6–5.5 GeV.

Item Type: Article
Uncontrolled Keywords: Exotics, Beyond Standard Model, Hadron-Hadron Scattering
Divisions: Faculty of Humanities & Social Sciences
Faculty of Science & Engineering
Faculty of Science & Engineering > School of Engineering
Faculty of Science & Engineering > School of Physical Sciences
Faculty of Science & Engineering > School of Physical Sciences > Physics
Faculty of Humanities & Social Sciences > School of the Arts
Faculty of Humanities & Social Sciences > School of the Arts > Architecture
Faculty of Science & Engineering > School of Engineering > Civil and Environmental Engineering
Depositing User: Symplectic Admin
Date Deposited: 13 Apr 2026 09:00
Last Modified: 22 May 2026 16:55
DOI: 10.1007/JHEP03(2026)178
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3197867
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