Search for leptoquark pair production decaying into te-t¯e+ or tμ-t¯μ+ in multi-lepton final states in pp collisions at s=13TeV with the ATLAS detector

ATLAS Collaboration [email protected]

Research output: Contribution to journalArticlepeer-review

Abstract

A search for leptoquark pair production decaying into te-t¯e+ or tμ-t¯μ+ in final states with multiple leptons is presented. The search is based on a dataset of pp collisions at s=13TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb-1. Four signal regions, with the requirement of at least three light leptons (electron or muon) and at least two jets out of which at least one jet is identified as coming from a b-hadron, are considered based on the number of leptons of a given flavour. The main background processes are estimated using dedicated control regions in a simultaneous fit with the signal regions to data. No excess above the Standard Model background prediction is observed and 95% confidence level limits on the production cross section times branching ratio are derived as a function of the leptoquark mass. Under the assumption of exclusive decays into te- (tμ-), the corresponding lower limit on the scalar mixed-generation leptoquark mass mLQmixd is at 1.58 (1.59) TeV and on the vector leptoquark mass mU~1 at 1.67 (1.67) TeV in the minimal coupling scenario and at 1.95 (1.95) TeV in the Yang–Mills scenario.

Original languageEnglish
Article number818
JournalEuropean Physical Journal C
Volume84
Issue number8
DOIs
StatePublished - Aug 2024

Funding

FundersFunder number
BSF-NSF
Australian Research Council
CERN DOCT
La Caixa Banking Foundation
Centre National pour la Recherche Scientifique et Technique
Fundação para a Ciência e a Tecnologia
Cooperative Research Centres, Australian Government Department of Industry
National Science Foundation
Norwegian Financial Mechanism
CEA-DRF
Science and Technology Facilities Council
H2020 Marie Skłodowska-Curie Actions
HORIZON EUROPE Marie Sklodowska-Curie Actions
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministry of Science and Technology, Taiwan
Israel Science Foundation
Wallenberg Foundation
Leverhulme Trust
PROMETEO
Staatssekretariat für Bildung, Forschung und Innovation
Javna Agencija za Raziskovalno Dejavnost RS
Generalitat de Catalunya
Bundesministerium für Wissenschaft, Forschung und Wirtschaft
Austrian Science Fund
Agencia Nacional de Investigación y Desarrollo
Bundesministerium für Bildung und Forschung
Helmholtz-Gemeinschaft
Danmarks Grundforskningsfond
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Canarie
Horizon 2020 Framework Programme
Göran Gustafssons Stiftelser
MIZŠ
European Commission
Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
U.S. Department of Energy
European Cooperation in Science and Technology
EU-ESF
RGC
Fundação de Amparo à Pesquisa do Estado de São Paulo
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
Irish Rugby Football Union
Cantons of Bern and Geneva
Chinese Academy of Sciences
Defence Science Institute
MNE
Agencia Nacional de Promoción Científica y Tecnológica
Royal Society
Minerva Foundation
National Research Foundation
Generalitat Valenciana
CERN
Ministerstvo Školství, Mládeže a Tělovýchovy
National Research Council Canada
Alexander von Humboldt-Stiftung
Multiple Sclerosis Scientific Research Foundation
Caring Futures Institute, Flinders University
Horizon 2020
British Columbia Knowledge Development Fund
Ministry of Education, Culture, Sports, Science and Technology
Norges ForskningsrådRCN-314472
Fundación BBVALEO22-1-603
Ministerio de Ciencia e InnovaciónRYC2019-028510-I
VetenskapsrådetSRC – 2017-05160, VR 2017-05092
H2020 MSC IF101033496
Center for Advancing Research Impact in SocietyJ1-3010
Fundación Bancaria Caixa d'Estalvis i Pensions de BarcelonaLCF/BQ/PI20/11760025
Japan Society for the Promotion of Science22H01227, JP21H05085, JP22H04944
Agence Nationale de la RechercheANR-20-CE31-0013, ANR-21-CE31-0013, ANR-11-LABX-0012, ANR-21-CE31-0022
MUCCACHIST-ERA-19-XAI-00
UNCESCI/013
Narodowa Agencja Wymiany AkademickiejPPN/PPO/2020/1/00002/U/00001
GenT Programmes Generalitat ValencianaCIDEGENT/2019/023, GVA-SEJI/2020/037, CIDEGENT/2019/027, CIDEGENT/2019/029
Deutsche ForschungsgemeinschaftDFG – CR 312/5-1
European Research Council948254
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungSNSF – PCEFP2_194658, RPG-2020-004, AFESD-2021-994
National Natural Science Foundation of ChinaNSFC – 12175119
European Regional Development FundIDIFEDER/2018/048
Knut och Alice Wallenbergs StiftelseKAW 2018.0157, KAW 2017.0100, KAW 2019.0447
Narodowe Centrum NaukiUMO-2020/37/B/ST2/01043, UMO-2019/34/E/ST2/00393, UMO-2021/40/C/ST2/00187
DRAC21/SCI/017
Fondo Nacional de Desarrollo Científico y Tecnológico1190886, 1210400
Instituto Nazionale di Fisica Nucleare754496
H2020 European Research CouncilHPOFHIC – 10103
DNSRCIN2P3-CNRS

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