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Search for heavy neutral leptons in [Formula omitted] decays

Aaij, R ; Abellán Beteta, C ; Ackernley, T ; Adeva, B ; Adinolfi, M ; Afsharnia, H ; Aidala, C. A

The European physical journal. C, Particles and fields, 2021-03, Vol.81 (3) [Periódico revisado por pares]

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Título:
Search for heavy neutral leptons in [Formula omitted] decays
Autor: Aaij, R ; Abellán Beteta, C ; Ackernley, T ; Adeva, B ; Adinolfi, M ; Afsharnia, H ; Aidala, C. A
Assuntos: Collisions (Nuclear physics)
É parte de: The European physical journal. C, Particles and fields, 2021-03, Vol.81 (3)
Descrição: 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 [Formula omitted] of proton-proton collision data at centre-of-mass energies of 7 and [Formula omitted] 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 [Formula omitted] confidence level in the heavy-neutrino mass range from 5 to [Formula omitted]. These are of the order of [Formula omitted] for lepton-number-conserving decays and of the order of [Formula omitted] for lepton-number-violating heavy-neutrino decays.
Editor: Springer
Idioma: Inglês

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