Measurement of single top-quark production in the s-channel in proton–proton collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications, T.M. Carter, R.Y. Gonzalez Andana, A. Hasib, M.P. Heath, S. Palazzo, V.A. Parrish, E.A. Pender, E.P. Takeva, N. Themistokleous, E.M. Villhauer, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A measurement of single top-quark production in the s-channel is performed in
proton–proton collisions at a centre-of-mass energy of 13 TeV with the ATLAS detector at the CERN Large Hadron Collider. The dataset corresponds to an integrated luminosity of 139 fb−1. The analysis is performed on events with an electron or muon, missing transverse momentum and exactly two b-tagged jets in the final state. A discriminant based on matrix element calculations is used to separate single-top-quark s-channel events from the main background contributions, which are top-quark pair production and W -boson production in
association with jets. The observed (expected) signal significance over the background-only hypothesis is 3.3 (3.9) standard deviations, and the measured cross-section is σ = 8.2+3.5−2.9 pb, consistent with the Standard Model prediction of σSM = 10.32+0.40−0.36 pb.
Original languageEnglish
Article number191
Pages (from-to)1-46
Number of pages46
Journal Journal of High Energy Physics
Volume2023
Issue number6
DOIs
Publication statusPublished - 27 Jun 2023

Keywords / Materials (for Non-textual outputs)

  • Hadron-Hadron Scattering
  • Top Physics

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