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. © 2021, CERN for the benefit of the LHCb collaboration.

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

Pappagallo, M.;
2021-01-01

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. © 2021, CERN for the benefit of the LHCb collaboration.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/379245
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