Search for New Phenomena in Final States with Two Leptons and One or No b-Tagged Jets at root S=13 TeV Using the ATLAS Detector
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American Physical Society
Aad, G... [et al.]. Search for New Phenomena in Final States with Two Leptons and One or No b-Tagged Jets at root S=13 TeV Using the ATLAS Detector. PHYSICAL REVIEW LETTERS 127, 141801 (2021). DOI: [10.1103/PhysRevLett.127.141801]
SponsorshipANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria; Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; 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; Agencia Nacional de Investigacion y Desarrollo, Chile; Chinese Academy of Sciences; Ministry of Science and Technology, China; National Natural Science Foundation of China (NSFC); Minciencias, Colombia; MSMT CR, MPO CR; MPO CR; Committee for Collaboration of the Czech Republic; CERN, Czech Republic; DNRF, Denmark; Danish Natural Science Research Council, Denmark; Centre National de la Recherche Scientifique (CNRS); CEA-DRF/IRFU, France; Shota Rustaveli National Science Foundation of Georgia, Georgia; Federal Ministry of Education & Research (BMBF); HGF, Germany; Max Planck Society; GSRI (General Secretariat for Research and Innovation, 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); Japan Society for the Promotion of Science; CNRST, Morocco; Netherlands Organization for Scientific Research (NWO); Netherlands Government; Research Council of Norway; Ministry of Science and Higher Education, Poland; NCN, Poland; Portuguese Foundation for Science and Technology European Commission; MNE/IFA, Romania; JINR; Ministry of Education and Science of the Russian Federation of Russia; NRC KI, Russian Federation; Ministry of Education, Science & Technological Development, Serbia; Ministry of Education, Science, Research and Sport, Slovakia; Slovenian Research Agency - Slovenia; Ministry of Education, Science and Sport, Slovenia; DSI/NRF, South Africa; Spanish Government; Swedish Research Council; Wallenberg Foundation, Sweden; Secretariat for Education and Research, Switzerland; Swiss National Science Foundation (SNSF); Cantons of Bern and Geneva, Switzerland; Ministry of Science and Technology, Taiwan; Ministry of Energy & Natural Resources - Turkey; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); United States Department of Energy (DOE); National Science Foundation (NSF); EU-ESF, Greece; Greek National Strategic Reference Framework, Greece; BSF-NSF, Israel; German-Israeli Foundation for Scientific Research and Development; La Caixa Banking Foundation, Spain; CERCA Programme Generalitat de Catalunya, Spain; Generalitat Valenciana; Goran Gustafssons Stiftelse, Sweden; Royal Society of London; Leverhulme Trust
A search for new phenomena is presented in final states with two leptons and one or no b-tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is based on the full run-2 proton-proton collision dataset recorded at a center-of-mass energy off root S = 13 TeV by the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 139 fb(-1). No significant deviation from the expected background is observed in the data. Inspired by the B-meson decay anomalies, a four-fermion contact interaction between two quarks (b, s) and two leptons (ee or mu mu) is used as a benchmark signal model, which is characterized by the energy scale and coupling, Lambda and g(*), respectively. Contact interactions with Lambda/g(*) lower than 2.0 (2.4) TeV are excluded for electrons (muons) at the 95% confidence level, still far below the value that is favored by the B-meson decay anomalies. Model-independent limits are set as a function of the minimum dilepton invariant mass, which allow the results to be reinterpreted in various signal scenarios.