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

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 $$3.0\, \text {fb} ^{-1} $$of proton-proton collision data at centre-of-mass energies of 7 and $$8\, \text {TeV} $$collected with the LH...

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Main Authors: Aaij, Roel (Author) , Archilli, Flavio (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Dziewiecki, Michal (Author) , Frau, Giulia (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Li, Peilian (Author) , Malygina, Hanna (Author) , Marks, Jörg (Author) , Meinert, Nis (Author) , Neubert, Sebastian (Author) , Piucci, Alessio (Author) , Sarpis, Mindaugas (Author) , Schmelling, Michael (Author) , Skidmore, Nicola (Author) , Stemmle, Simon (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Viemann, Harald (Author) , Waldi, Roland (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 22 March 2021
In: The European physical journal. C, Particles and fields
Year: 2021, Volume: 81, Issue: 3, Pages: 1-15
ISSN:1434-6052
DOI:10.1140/epjc/s10052-021-08973-5
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-021-08973-5
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Author Notes:LHCb Collaboration*
Description
Summary: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 $$3.0\, \text {fb} ^{-1} $$of proton-proton collision data at centre-of-mass energies of 7 and $$8\, \text {TeV} $$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 $$95\%$$confidence level in the heavy-neutrino mass range from 5 to $$50\, \text {GeV/}c^2 $$. 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.
Item Description:Im Titel sind "±", und "+" hochgestellt
Gesehen am 04.05.2021
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-021-08973-5

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