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    Aiola, S.; Artamonov, A.; Balagura, V.; Belavin, V.; Belous, K.; Bhom, J.; Birch, M.; Bjørn, M.; Blake, T.; Boelhauve, J. A.; Brea Rodriguez, A.; Bursche, A.; Calabrese, R.; Campoverde Quezada, A. F.; Capelli, S.; Cardini, A.; Chatzikonstantinidis, G.; Couturier, B.; Davis, A.; Dean, C. T.; Di Nezza, P.; Durham, J. M.; Fernandez-tenllado Arribas, J. M.; Filippov, S.; Fiorini, M.; Franco Lima, V.; Gallas Torreira, A.; Garau, M.; Gaspar, C.; Giugliano, C.; Graciani Diaz, R.; Grillo, L.; Gromov, S.; Haefeli, G.; Haines, S. C.; Hansmann-Menzemer, S.; Hennequin, A. M.; Heuel, J.; Hulsbergen, W.; Idzik, M.; Jost, B.; Kang, Y.; Kenzie, M.; Ketel, T.; Klimaszewski, K.; Kondybayeva, A.; Kopciewicz, P.; Koppenburg, P.; Kucharczyk, M.; Lesiak, T.; Li, H.; Li, L.; Lisovskyi, V.; Maciuc, F.; Macko, V.; Madejczyk, O.; Manera Escalero, R.; Marinangeli, M.; Matiunin, V.; McCann, M.; Merli, A.; O’Hanlon, D. P.; Onderwater, C. J. G.; Pais, P. R.; Palutan, M.; Parkes, C.; Poliakova, M.; Popov, A.; Poslavskii, S.; Pullen, H.; Quagliani, R.; Ratnikov, F.; Ruf, T.; Saborido Silva, J. J.; Sciubba, A.; Shchutska, L.; Shekhtman, L.; Skiba, I.; Stagni, F.; Stevens, H.; Sun, Y.; Swallow, P. N.; T’Jampens, S.; Tomassetti, L.; Torres Machado, D.; Tou, D. Y.; Traill, M.; Tran, M. T.; Tuci, G.; Usachov, A.; Ustyuzhanin, A.; Van Hecke, H.; Vecchi, S.; Vorobyev, A.; Waldi, R.; Wotton, S. A.; Xu, M.; Xu, Q.; Yuan, X.; Zenaiev, O.

    The European physical journal. C, Particles and fields, 03/2021, Letnik: 81, Številka: 3
    Journal Article

    Abstract A search is performed for heavy neutrinos in the decay of a W boson into two muons and a jet. The data set corresponds to an integrated luminosity of approximately $$3.0\, \text {fb} ^{-1} $$ 3.0 fb - 1 of proton–proton collision data at centre-of-mass energies of 7 and $$8\, \text {TeV} $$ 8 TeV collected with the LHCb experiment. Both same-sign and opposite-sign muons in the final state are considered. Data are found to be consistent with the expected background. Upper limits on the coupling of a heavy neutrino with the Standard Model neutrino are set at $$95\%$$ 95 % confidence level in the heavy-neutrino mass range from 5 to $$50\, \text {GeV/}c^2 $$ 50 GeV/ c 2 . These are of the order of $$10^{-3}$$ 10 - 3 for lepton-number-conserving decays and of the order of $$10^{-4}$$ 10 - 4 for lepton-number-violating heavy-neutrino decays.