Abstract
A combination of searches for the single production of vectorlike top quarks ((Formula presented)) is presented. These analyses are based on proton-proton collisions at (Formula presented) recorded in 2015-2018 with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of (Formula presented). The (Formula presented) decay modes considered in this combination are into a top quark and either a Standard Model Higgs boson or a (Formula presented) boson ((Formula presented) and (Formula presented)). The individual searches used in the combination are differentiated by the number of leptons ((Formula presented), (Formula presented)) in the final state. The observed data are found to be in good agreement with the Standard Model background prediction. Interpretations are provided for a range of masses and couplings of the vectorlike top quark for benchmark models and generalized representations in terms of 95% confidence level limits. For a benchmark signal prediction of a vectorlike top quark SU(2) singlet with electroweak coupling, (Formula presented), of 0.5, masses below 2.1 TeV are excluded, resulting in the most restrictive limits to date.
| Original language | English |
|---|---|
| Article number | 012012 |
| Journal | Physical Review D |
| Volume | 111 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 1 2025 |
| Externally published | Yes |
Funding
We thank CERN for the very successful operation of the LHC and its injectors, as well as the support staff at CERN and at our institutions worldwide without whom ATLAS could not be operated efficiently. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF/SFU (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref. [114]. We gratefully acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW, Poland; FCT, Portugal; MNE/IFA, Romania; MSTDI, Serbia; MSSR, Slovakia; ARIS and MVZI, Slovenia; DSI/NRF, South Africa; MICIU/AEI, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; NSTC, Taipei; TENMAK, Türkiye; STFC/UKRI, United Kingdom; DOE and NSF, U.S. Individual groups and members have received support from BCKDF, CANARIE, CRC and DRAC, Canada; CERN-CZ, FORTE and PRIMUS, Czech Republic; COST, ERC, ERDF, Horizon 2020, ICSC-NextGenerationEU and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. In addition, individual members wish to acknowledge support from Armenia: Yerevan Physics Institute (FAPERJ); CERN: European Organization for Nuclear Research (CERN PJAS); Chile: Agencia Nacional de Investigación y Desarrollo (FONDECYT 1230812, FONDECYT 1230987, FONDECYT 1240864); China: Chinese Ministry of Science and Technology (MOST-2023YFA1605700), National Natural Science Foundation of China (NSFC—12175119, NSFC 12275265, NSFC-12075060); Czech Republic: Czech Science Foundation (GACR—24-11373S), Ministry of Education Youth and Sports (FORTE CZ.02.01.01/00/22_008/0004632), PRIMUS Research Programme (PRIMUS/21/SCI/017); EU: H2020 European Research Council (ERC—101002463); European Union: European Research Council (ERC—948254, ERC 101089007), Horizon 2020 Framework Programme (MUCCA—CHIST-ERA-19-XAI-00), European Union, Future Artificial Intelligence Research (FAIR-NextGenerationEU PE00000013), Italian Center for High Performance Computing, Big Data and Quantum Computing (ICSC, NextGenerationEU); France: Agence Nationale de la Recherche (ANR-20-CE31-0013, ANR-21-CE31-0013, ANR-21-CE31-0022, ANR-22-EDIR-0002), Investissements d’Avenir Labex (ANR-11-LABX-0012); Germany: Baden-Württemberg Stiftung (BW Stiftung-Postdoc Eliteprogramme), Deutsche Forschungsgemeinschaft (DFG—469666862, DFG—CR 312/5-2); Italy: Istituto Nazionale di Fisica Nucleare (ICSC, NextGenerationEU), Ministero dell’Università e della Ricerca (PRIN—20223N7F8K—PNRR M4.C2.1.1); Japan: Japan Society for the Promotion of Science (JSPS KAKENHI JP22H01227, JSPS KAKENHI JP22H04944, JSPS KAKENHI JP22KK0227, JSPS KAKENHI JP23KK0245); Netherlands: Netherlands Organisation for Scientific Research (NWO Veni 2020—VI.Veni.202.179); Norway: Research Council of Norway (RCN-314472); Poland: Ministry of Science and Higher Education (IDUB AGH, POB8, D4 no 9722), Polish National Agency for Academic Exchange (PPN/PPO/2020/1/00002/U/00001), Polish National Science Centre (NCN 2021/42/E/ST2/00350, NCN OPUS nr 2022/47/B/ST2/03059, NCN UMO-2019/34/E/ST2/00393, NCN & H2020 MSCA 945339, UMO-2020/37/B/ST2/01043, UMO-2021/40/C/ST2/00187, UMO-2022/47/O/ST2/00148, UMO-2023/49/B/ST2/04085, UMO-2023/51/B/ST2/00920); Slovenia: Slovenian Research Agency (ARIS grant J1-3010); Spain: Generalitat Valenciana (Artemisa, FEDER, IDIFEDER/2018/048), Ministry of Science and Innovation (MCIN & NextGenEU PCI2022-135018-2, MICIN & FEDER PID2021-125273NB, RYC2019-028510-I, RYC2020-030254-I, RYC2021-031273-I, RYC2022-038164-I), PROMETEO and GenT Programmes Generalitat Valenciana (CIDEGENT/2019/027); Sweden: Carl Trygger Foundation (Carl Trygger Foundation CTS 22∶2312), Swedish Research Council (Swedish Research Council 2023-04654, VR 2018-00482, VR 2022-03845, VR 2022-04683, VR 2023-03403, VR grant 2021-03651), Knut and Alice Wallenberg Foundation (KAW 2018.0157, KAW 2018.0458, KAW 2019.0447, KAW 2022.0358); Switzerland: Swiss National Science Foundation (SNSF—PCEFP2_194658); United Kingdom: Leverhulme Trust (Leverhulme Trust RPG-2020-004), Royal Society (NIF-R1-231091); U.S.: U.S. Department of Energy (ECA DE-AC02-76SF00515), Neubauer Family Foundation. We thank CERN for the very successful operation of the LHC and its injectors, as well as the support staff at CERN and at our institutions worldwide without whom ATLAS could not be operated efficiently. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF/SFU (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref. . We gratefully acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW, Poland; FCT, Portugal; MNE/IFA, Romania; MSTDI, Serbia; MSSR, Slovakia; ARIS and MVZI, Slovenia; DSI/NRF, South Africa; MICIU/AEI, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; NSTC, Taipei; TENMAK, Türkiye; STFC/UKRI, United Kingdom; DOE and NSF, U.S. Individual groups and members have received support from BCKDF, CANARIE, CRC and DRAC, Canada; CERN-CZ, FORTE and PRIMUS, Czech Republic; COST, ERC, ERDF, Horizon 2020, ICSC-NextGenerationEU and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. In addition, individual members wish to acknowledge support from Armenia: Yerevan Physics Institute (FAPERJ); CERN: European Organization for Nuclear Research (CERN PJAS); Chile: Agencia Nacional de Investigación y Desarrollo (FONDECYT 1230812, FONDECYT 1230987, FONDECYT 1240864); China: Chinese Ministry of Science and Technology (MOST-2023YFA1605700), National Natural Science Foundation of China (NSFC—12175119, NSFC 12275265, NSFC-12075060); Czech Republic: Czech Science Foundation (GACR—24-11373S), Ministry of Education Youth and Sports (FORTE CZ.02.01.01/00/22_008/0004632), PRIMUS Research Programme (PRIMUS/21/SCI/017); EU: H2020 European Research Council (ERC—101002463); European Union: European Research Council (ERC—948254, ERC 101089007), Horizon 2020 Framework Programme (MUCCA—CHIST-ERA-19-XAI-00), European Union, Future Artificial Intelligence Research (FAIR-NextGenerationEU PE00000013), Italian Center for High Performance Computing, Big Data and Quantum Computing (ICSC, NextGenerationEU); France: Agence Nationale de la Recherche (ANR-20-CE31-0013, ANR-21-CE31-0013, ANR-21-CE31-0022, ANR-22-EDIR-0002), Investissements d’Avenir Labex (ANR-11-LABX-0012); Germany: Baden-Württemberg Stiftung (BW Stiftung-Postdoc Eliteprogramme), Deutsche Forschungsgemeinschaft (DFG—469666862, DFG—CR 312/5-2); Italy: Istituto Nazionale di Fisica Nucleare (ICSC, NextGenerationEU), Ministero dell’Università e della Ricerca (PRIN—20223N7F8K—PNRR M4.C2.1.1); Japan: Japan Society for the Promotion of Science (JSPS KAKENHI JP22H01227, JSPS KAKENHI JP22H04944, JSPS KAKENHI JP22KK0227, JSPS KAKENHI JP23KK0245); Netherlands: Netherlands Organisation for Scientific Research (NWO Veni 2020—VI.Veni.202.179); Norway: Research Council of Norway (RCN-314472); Poland: Ministry of Science and Higher Education (IDUB AGH, POB8, D4 no 9722), Polish National Agency for Academic Exchange (PPN/PPO/2020/1/00002/U/00001), Polish National Science Centre (NCN 2021/42/E/ST2/00350, NCN OPUS nr 2022/47/B/ST2/03059, NCN UMO-2019/34/E/ST2/00393, NCN & H2020 MSCA 945339, UMO-2020/37/B/ST2/01043, UMO-2021/40/C/ST2/00187, UMO-2022/47/O/ST2/00148, UMO-2023/49/B/ST2/04085, UMO-2023/51/B/ST2/00920); Slovenia: Slovenian Research Agency (ARIS grant J1-3010); Spain: Generalitat Valenciana (Artemisa, FEDER, IDIFEDER/2018/048), Ministry of Science and Innovation (MCIN & NextGenEU PCI2022-135018-2, MICIN & FEDER PID2021-125273NB, RYC2019-028510-I, RYC2020-030254-I, RYC2021-031273-I, RYC2022-038164-I), PROMETEO and GenT Programmes Generalitat Valenciana (CIDEGENT/2019/027); Sweden: Carl Trygger Foundation (Carl Trygger Foundation CTS 22∶2312), Swedish Research Council (Swedish Research Council 2023-04654, VR 2018-00482, VR 2022-03845, VR 2022-04683, VR 2023-03403, VR grant 2021-03651), Knut and Alice Wallenberg Foundation (KAW 2018.0157, KAW 2018.0458, KAW 2019.0447, KAW 2022.0358); Switzerland: Swiss National Science Foundation (SNSF—PCEFP2_194658); United Kingdom: Leverhulme Trust (Leverhulme Trust RPG-2020-004), Royal Society (NIF-R1-231091); U.S.: U.S. Department of Energy (ECA DE-AC02-76SF00515), Neubauer Family Foundation.
| Funders | Funder number |
|---|---|
| Ministerio de Ciencia, Innovación y Universidades | |
| BSF-NSF | |
| Australian Research Council | |
| DRAC | |
| La Caixa Banking Foundation | |
| BMWFW | |
| Centre National pour la Recherche Scientifique et Technique | |
| Fundação para a Ciência e a Tecnologia | |
| European Union, Future Artificial Intelligence Research | |
| Cooperative Research Centres, Australian Government Department of Industry | |
| Center for Advancing Research Impact in Society | |
| National Science Foundation | |
| CEA-DRF | |
| Horizon 2020, ICSC-NextGenerationEU | |
| H2020 Marie Skłodowska-Curie Actions | |
| INFN-CNAF | |
| Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | |
| Nederlandse Organisatie voor Wetenschappelijk Onderzoek | |
| Ministry of Science and Technology, Taiwan | |
| Israel Science Foundation | |
| Wallenberg Foundation | |
| Leverhulme Trust | |
| Baden-Württemberg Stiftung | |
| MVZI | |
| PROMETEO | |
| Neubauer Family Foundation | |
| Staatssekretariat für Bildung, Forschung und Innovation | |
| IDUB AGH | |
| Generalitat de Catalunya | |
| Instituto Nazionale di Fisica Nucleare | |
| Austrian Science Fund | |
| Yerevan Physics Institute | |
| Agencia Nacional de Investigación y Desarrollo | |
| Bundesministerium für Bildung und Forschung | |
| Helmholtz-Gemeinschaft | |
| Danmarks Grundforskningsfond | |
| Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
| Forskningsrådet för hälsa, arbetsliv och välfärd | |
| Karlsruhe Institute of Technology | |
| Canarie | |
| GridKA | |
| Horizon 2020 Framework Programme | |
| Göran Gustafssons Stiftelser | |
| European Commission | |
| European Cooperation in Science and Technology | |
| EU-ESF | |
| International Council of Shopping Centers | |
| RGC | |
| Fundação de Amparo à Pesquisa do Estado de São Paulo | |
| PRIMUS | |
| Institutul de Fizică Atomică | |
| Natural Sciences and Engineering Research Council of Canada | |
| Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science | |
| GenT Programmes Generalitat Valenciana, Spain | |
| National Science and Technology Council | |
| Irish Rugby Football Union | |
| Cantons of Bern and Geneva | |
| Chinese Academy of Sciences | |
| Defence Science Institute | |
| MSTDI | |
| MNE | |
| Agencia Nacional de Promoción Científica y Tecnológica | |
| Royal Society | |
| Minerva Foundation | |
| CERN-CZ | |
| National Research Foundation | |
| Ministerstwo Edukacji i Nauki | |
| Generalitat Valenciana | |
| CERN | |
| National Research Council Canada | |
| Brookhaven National Laboratory | |
| Alexander von Humboldt-Stiftung | |
| Multiple Sclerosis Scientific Research Foundation | |
| Caring Futures Institute, Flinders University | |
| British Columbia Knowledge Development Fund | |
| Ministry of Education, Culture, Sports, Science and Technology | |
| UK Research and Innovation | |
| Australian Education International, Australian Government | |
| Vetenskapsrådet | VR 2018-00482, 2021-03651, VR 2022-04683, VR 2023-03403, VR 2022-03845, 2023-04654 |
| Japan Society for the Promotion of Science | JP23KK0245, JP22H04944, JP22H01227, JP22KK0227 |
| European Research Council | 101089007, 948254 |
| The Slovenian Research and Innovation Agency | J1-3010 |
| FAIR-NextGenerationEU | PE00000013 |
| Agence Nationale de la Recherche | ANR-20-CE31-0013, ANR-22-EDIR-0002, ANR-21-CE31-0013, ANR-21-CE31-0022 |
| Carl Tryggers Stiftelse för Vetenskaplig Forskning | CTS 22∶2312 |
| Science and Technology Facilities Council | ST/T002816/1 |
| H2020 European Research Council | ERC—101002463 |
| GenT Programmes Generalitat Valenciana | CIDEGENT/2019/027 |
| Ministero dell’Istruzione, dell’Università e della Ricerca | PRIN—20223N7F8K—PNRR M4.C2.1.1 |
| Narodowe Centrum Nauki | H2020 MSCA 945339, UMO-2022/47/O/ST2/00148, UMO-2020/37/B/ST2/01043, UMO-2023/51/B/ST2/00920, UMO-2019/34/E/ST2/00393, 2021/42/E/ST2/00350, 2022/47/B/ST2/03059, UMO-2021/40/C/ST2/00187, UMO-2023/49/B/ST2/04085 |
| Deutsche Forschungsgemeinschaft | DFG—469666862, DFG—CR 312/5-2 |
| National Natural Science Foundation of China | NSFC—12175119, 12275265, NSFC-12075060 |
| European Regional Development Fund | IDIFEDER/2018/048 |
| Ministerstvo Školství, Mládeže a Tělovýchovy | PRIMUS/21/SCI/017, CZ.02.01.01/00/22_008/0004632 |
| DNSRC | IN2P3-CNRS |
| Grantová Agentura České Republiky | GACR—24-11373S |
| U.S. Department of Energy | ECA DE-AC02-76SF00515 |
| Norges Forskningsråd | RCN-314472 |
| Knut och Alice Wallenbergs Stiftelse | KAW 2022.0358, KAW 2018.0157, KAW 2018.0458, KAW 2019.0447 |
| Fondo Nacional de Desarrollo Científico y Tecnológico | 1230987, 1230812, 1240864 |
| Investissements d’Avenir Labex | ANR-11-LABX-0012 |
| Ministerio de Ciencia e Innovación | PID2021-125273NB, RYC2021-031273-I, RYC2022-038164-I, PCI2022-135018-2, RYC2020-030254-I, RYC2019-028510-I |
| MUCCA | CHIST-ERA-19-XAI-00 |
| Ministry of Science and Technology of the People's Republic of China | MOST-2023YFA1605700 |
| Narodowa Agencja Wymiany Akademickiej | PPN/PPO/2020/1/00002/U/00001 |
| North Dakota Game and Fish Department | CC-IN2P3 |
| Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | RPG-2020-004, NIF-R1-231091, SNSF—PCEFP2_194658 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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