Search for New Phenomena in Final States with Two Leptons and One or No b -Tagged Jets at s =13 TeV Using the ATLAS Detector

G Aad; B Abbott; DC Abbott; A Abed Abud; K Abeling; DK Abhayasinghe; SH Abidi; H Abramowicz; H Abreu; Y Abulaiti; AC Abusleme Hoffman; BS Acharya; B Achkar; L Adam; C Adam Bourdarios; L Adamczyk; L Adamek; J Adelman; A Adiguzel; S Adorni; T Adye; AA Affolder; Y Afik; C Agapopoulou; MN Agaras; J Agarwala; A Aggarwal; C Agheorghiesei; JA Aguilar-Saavedra; A Ahmad; F Ahmadov; WS Ahmed; X Ai; G Aielli; S Akatsuka; M Akbiyik; TPA Åkesson; AV Akimov; K Al Khoury; GL Alberghi; J Albert; MJ Alconada Verzini; S Alderweireldt; M Aleksa; IN Aleksandrov; C Alexa; T Alexopoulos; A Alfonsi; F Alfonsi; M Alhroob; B Ali; S Ali; M Aliev; G Alimonti; C Allaire; BMM Allbrooke; PP Allport; A Aloisio; F Alonso; C Alpigiani; E Alunno Camelia; M Alvarez Estevez; MG Alviggi; Y Amaral Coutinho; A Ambler; L Ambroz; C Amelung; D Amidei; SP Amor Dos Santos; S Amoroso; CS Amrouche; C Anastopoulos; N Andari; T Andeen; JK Anders; SY Andrean; A Andreazza; V Andrei; S Angelidakis; A Angerami; AV Anisenkov; A Annovi; C Antel; MT Anthony; E Antipov; M Antonelli; DJA Antrim; F Anulli; M Aoki; JA Aparisi Pozo; MA Aparo; L Aperio Bella; N Aranzabal; V Araujo Ferraz; C Arcangeletti; ATH Arce; E Arena; JF Arguin; S Argyropoulos; JH Arling

Journal article

Search for New Phenomena in Final States with Two Leptons and One or No b -Tagged Jets at s =13 TeV Using the ATLAS Detector

G Aad, B Abbott, DC Abbott, A Abed Abud, K Abeling, DK Abhayasinghe, SH Abidi, H Abramowicz, H Abreu, Y Abulaiti, AC Abusleme Hoffman, BS Acharya, B Achkar, L Adam, C Adam Bourdarios, L Adamczyk, L Adamek, J Adelman, A Adiguzel, S Adorni Show all

Physical Review Letters | Published : 2021

DOI: 10.1103/PhysRevLett.127.141801

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Abstract

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 of 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 μμ) is used as a benchmark signal model, which ..

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University of Melbourne Researchers

Federico Scutti Author

Elisabetta Barberio Author

Jafar Shojaii Author

G. N. Taylor Author

Grants

Awarded by Agence Nationale de la Recherche

Funding Acknowledgements

We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC, and CFI, Canada; CERN; Agencia Nacional de Investigacion y Desarrollo, Chile; CAS, MOST, and NSFC, China; Minciencias, Colombia; MSMT CR, MPO CR, and Committee for Collaboration of the Czech Republic with CERN, Czech Republic; DNRF and Danish Natural Science Research Council, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; Shota Rustaveli National Science Foundation of Georgia, Georgia; BMBF, HGF, and MPG, Germany; GSRI (General Secretariat for Research and Innovation, Greece); RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; Research Council of Norway, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; JINR; Ministry of Education and Science of the Russian Federation of Russia and NRC KI, Russian Federation; Ministry of Education, Science and Technological Development, Serbia; Ministry of Education, Science, Research and Sport, Slovakia; ARRS and Ministry of Education, Science and Sport, Slovenia; DSI/NRF, South Africa; MICINN, Spain; Swedish Research Council andWallenberg Foundation, Sweden; Secretariat for Education and Research, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada, CRC, and IVADO, Canada; Beijing Municipal Science & Technology Commission, China; COST, ERC, ERDF, Horizon 2020, and Marie Sklodowska-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 cofinanced by EU-ESF and the Greek National Strategic Reference Framework, Greece; BSF-NSF and GIF, Israel; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya, and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK), and BNL (US), the Tier-2 facilities worldwide, and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref.