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 3.0fb-1 of proton–proton collision data at centre-of-mass energies of 7 and 8TeV 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 % confidence level in the heavy-neutrino mass range from 5 to 50GeV/c2. These are of the order of 10 - 3 for lepton-number-conserving decays and of the order of 10 - 4 for lepton-number-violating heavy-neutrino decays.

Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Search for heavy neutral leptons in W+→μ+μ±jet decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 81(3) [10.1140/epjc/s10052-021-08973-5].

Search for heavy neutral leptons in W+→μ+μ±jet decays

Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Gotti C.;Martinazzoli L.;Martinelli M.;Petruzzo M.;Shields E. B.;
2021

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 3.0fb-1 of proton–proton collision data at centre-of-mass energies of 7 and 8TeV 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 % confidence level in the heavy-neutrino mass range from 5 to 50GeV/c2. These are of the order of 10 - 3 for lepton-number-conserving decays and of the order of 10 - 4 for lepton-number-violating heavy-neutrino decays.
Articolo in rivista - Articolo scientifico
LHCb
English
2021
81
3
248
none
Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Search for heavy neutral leptons in W+→μ+μ±jet decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 81(3) [10.1140/epjc/s10052-021-08973-5].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/399774
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