Search for single production of a vector-like B' quark decaying to a top quark and a W boson in the single-lepton final state in proton-proton collisions at √s = 13 TeV

@misc{collaboration2026search,
  title = {{Search for single production of a vector-like B' quark decaying to a top quark and a W boson in the single-lepton final state in proton-proton collisions at $\sqrts$ = 13 TeV}},
  author = {CMS Collaboration},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.01423},
  eprint = {2606.01423},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.01423},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Search for single production of a vector-like B' quark decaying to a top quark and a W boson in the single-lepton final state in proton-proton collisions at √s = 13 TeV
AU  - CMS Collaboration
PY  - 2026
DA  - 2026/10/12
PB  - arXiv
DO  - 10.48550/arxiv.2606.01423
UR  - https://arxiv.org/abs/2606.01423
AB  - 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. This search targets a single-lepton final state, where a muon or electron originates either from the semileptonic decay of the t quark or from the leptonic decay of the W boson, with the other particle decaying hadronically. The (semi-)leptonic portion of the event is reconstructed from an electron or muon, missing transverse momentum, and a small-radius jet identified as a b quark jet if the muon or electron originates from the t quark. The hadronic portion of the event is reconstructed as a single large-radius jet. The originating particle of the large-radius jet is identified using a neural-network-based tagger, and the dominant background contributions are modeled from data using a neural autoregressive flow network. The data were collected from 2016 to 2018 by the CMS experiment at the LHC in proton-proton collisions at √s = 13 TeV, corresponding to an integrated luminosity of 138 fb^−1. This search is the most sensitive to date to the production of single narrow-width B' quarks. It excludes electroweak-singlet B' quarks with Γ/m_B' = 5% for masses between 0.8 and 1.23 TeV. Limits are also placed on the production cross section of single B' quarks produced in association with t quarks, and on the coupling factor of the B' quark to electroweak bosons.
ER  -