Search for long-lived particles decaying to <i>e</i><SUP>±</SUP>μ<SUP>∓</SUP>ν



Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 975 more authors) (2021) Search for long-lived particles decaying to <i>e</i><SUP>±</SUP>μ<SUP>∓</SUP>ν. EUROPEAN PHYSICAL JOURNAL C, 81 (3). 261-.

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Abstract

Long-lived particles decaying to $e^\pm \mu^\mp \nu$, with masses between 7 and $50$ GeV/c$^2$ and lifetimes between 2 and $50$ ps, are searched for by looking at displaced vertices containing electrons and muons of opposite charges. The search is performed using $5.4$ fb$^{-1}$ of $pp$ collisions collected with the LHCb detector at a centre-of-mass energy of $\sqrt{s} = 13$ TeV. Three mechanisms of production of long-lived particles are considered: the direct pair production from quark interactions, the pair production from the decay of a Standard-Model-like Higgs boson with a mass of $125$ GeV/c$^2$, and the charged current production from an on-shell $W$ boson with an additional lepton. No evidence of these long-lived states is obtained and upper limits on the production cross-section times branching fraction are set on the different production modes.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-027.html (LHCb public pages)
Uncontrolled Keywords: hep-ex, hep-ex
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 21 Apr 2021 10:20
Last Modified: 16 Oct 2023 16:19
DOI: 10.1140/epjc/s10052-021-08994-0
Open Access URL: https://link.springer.com/content/pdf/10.1140/epjc...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3120041