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Title
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Search for new physics in the τ lepton plus missing transverse momentum final state in proton-proton collisions at √s=13 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| A search for physics beyond the standard model (SM) in the final state with a hadronically decaying tau lepton and a neutrino is presented. This analysis is based on data recorded by the CMS experiment from proton-proton collisions at a center-of-mass energy of 13TeV at the LHC, corresponding to a total integrated luminosity of 138 fb(-1). The transverse mass spectrum is analyzed for the presence of new physics. No significant deviation from the SM prediction is observed. Limits are set on the production cross section of a W' boson decaying into a tau lepton and a neutrino. Lower limits are set on the mass of the sequential SM-like heavy charged vector boson and the mass of a quantum black hole. Upper limits are placed on the couplings of a new boson to the SM fermions. Constraints are put on a nonuniversal gauge interaction model and an effective field theory model. For the first time, upper limits on the cross section of t-channel leptoquark (LQ) exchange are presented. These limits are translated into exclusion limits on the LQ mass and on its coupling in the t-channel. The sensitivity of this analysis extends into the parameter space of LQ models that attempt to explain the anomalies observed in B meson decays. The limits presented for the various interpretations are the most stringent to date. Additionally, a model-independent limit is provided. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2023
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP09(2023)051
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Volume/pages
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9
(2023)
, p. 1-52
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Article Reference
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051
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ISI
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001090971800001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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