Measurement of single top-quark production in the s-channel in proton–proton collisions at p s = 13 TeV with the ATLAS detector
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Hadron-Hadron ScatteringTop Physics
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]
SponsorshipANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria; Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ); Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada (NSERC); NRC, Canada; Canada Foundation for Innovation; CERN; ANID, Chile; Chinese Academy of Sciences; Ministry of Science and Technology, China; National Natural Science Foundation of China (NSFC); Minciencias, Colombia; MEYS CR, Czech Republic; National Research Foundation of Korea; Danish Natural Science Research Council; Centre National de la Recherche Scientifique (CNRS); CEA-DRF/IRFU, France; SRNSFG, Georgia; Federal Ministry of Education & Research (BMBF); HGF, Germany; Max Planck Society; GSRI, Greece; RGC, China; Hong Kong SAR, China; Israel Science Foundation; Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; Netherlands Organization for Scientific Research (NWO) Netherlands Government; RCN, Norway; MEiN, Poland; Fundacao para a Ciencia e a Tecnologia (FCT); MNE/IFA, Romania; Ministry of Education, Science & Technological Development, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia; MIZS, Slovenia; DSI/NRF, South Africa; Spanish Government; SRC, Sweden; Wallenberg Foundation, Sweden; SERI, Switzerland; Swiss National Science Foundation (SNSF); Canton of Bern, Switzerland; Canton of Geneva, Switzerland; Ministry of Science and Technology, Taiwan; TENMAK, Turkiye; UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC); United States Department of Energy (DOE); National Science Foundation (NSF); BCKDF, Canada; CANARIE, Canada; Compute Canada, Canada; CRC, Canada; PRIMUS, Czech Republic; UNCE, Czech Republic; COST, European Union; European Union (EU) European Research Council (ERC); European Union (EU) Marie Curie Actions; Horizon 2020, European Union; European Union (EU) Marie Curie Actions; Agence Nationale de la Recherche (ANR); German Research Foundation (DFG); Alexander von Humboldt Foundation; Herakleitos programme - EU-ESF, Greece; Thales Group; Aristeia programme - EU-ESF, Greece; Greek NSRF, Greece; BSF-NSF, Israel; MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN, Poland; Polish National Agency for Academic Exchange (NAWA); La Caixa Banking Foundation, Spain; https://www.webofscience.com/wos/alldb/full-record/WOS:001035243000001#:~:text=CERCA%20Programme%20Generalitat%20de%20Catalunya%2C%20Spain; PROMETEO Programme Generalitat Valenciana, Spain; GenT Programme Generalitat Valenciana, Spain; https://www.webofscience.com/wos/alldb/full-record/WOS:001035243000001#:~:text=Goran%20Gustafssons%20Stiftelse%2C%20Sweden; Royal Society; Leverhulme Trust
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.