Compact Muon Solenoid
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| CMS-PAS-B2G-24-013 | ||
| Search for single production of a vector-like B' quark decaying to tW in the single-lepton final state | ||
| CMS Collaboration | ||
| 2026-03-15 | ||
| Abstract: A search is presented for the single production of a narrow-width vector-like B' quark that decays to a t quark and a W boson, with one of the decay products yielding an electron or muon. The data were collected from 2016 to 2018 by the CMS experiment at the LHC in proton-proton collisions at $ \sqrt{s}= $ 13 TeV, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. The search is performed in a single-lepton final state, where the B' quark candidate is reconstructed from an electron or muon, missing transverse momentum, and one or more jets. The originating particles of large-radius jets are identified using a neural-network-based tagger, and the dominant background contributions are modeled from data using a neural autoregressive flow network. This search is the first to be sensitive to single production of narrow-width B' quarks via the electroweak interaction, excluding singlet B' quarks with $ \Gamma/m_{B'}=5% $ for masses between 0.8 and 1.23$ \mathrm{TeV} $. Limits are also placed on the single production cross section for B' quarks produced in association with t quarks, and on the coupling of the B' quark to electroweak bosons. | ||
| Links: CDS record (PDF) ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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