Measurement of single top-quark production in the s-channel in proton–proton collisions at p s = 13 TeV with the ATLAS detector Atlas Collaboration Aguilar Saavedra, Juan Antonio Rodríguez Chala, Mikael Hadron-Hadron Scattering Top Physics 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 pb, consistent with the Standard Model prediction of pb. 2023-10-23T08:52:39Z 2023-10-23T08:52:39Z 2023-06-27 info:eu-repo/semantics/article The ATLAS collaboration., Aad, G., Abbott, B. et al. Measurement of single top-quark production in the s-channel in proton–proton collisions at = 13 TeV with the ATLAS detector. J. High Energ. Phys. 2023, 191 (2023). [https://doi.org/10.1007/JHEP06(2023)191] https://hdl.handle.net/10481/85171 10.1007/JHEP06(2023)191 eng http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional Springer Nature