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Search for pair production of Higgs bosons in the bb¯ bb¯ final state using proton-proton collisions at √s=13 TeV with the ATLAS detector

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Published
Article number30
<mark>Journal publication date</mark>31/01/2019
<mark>Journal</mark>Journal of High Energy Physics
Issue number1
Volume2019
Number of pages49
Publication StatusPublished
Early online date3/01/19
<mark>Original language</mark>English

Abstract

A search for Higgs boson pair production in the bb¯ bb¯ final state is carried out with up to 36.1 fb−1 of LHC proton-proton collision data collected at s=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to bb¯ bb¯ are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.[Figure not available: see fulltext.]. © 2019, The Author(s).

Bibliographic note

Export Date: 21 February 2019 Funding details: Ministerstwo Nauki i Szkolnictwa Wyższego, MNiSW Funding details: Australian Research Council, ARC Funding details: Fuel Cell Technologies Program, FCT Funding details: Joint Institute for Nuclear Research, JINR Funding details: British Columbia Knowledge Development Fund, BCKDF Funding details: German-Israeli Foundation for Scientific Research and Development, GIF Funding details: Consejo Nacional de Innovación, Ciencia y Tecnología, CONICYT Funding details: Ministry of Science and Technology, MOST Funding details: Iowa Science Foundation, ISF Funding details: Ministerstvo Průmyslu a Obchodu, MPO Funding details: American Roentgen Ray Society, ARRS Funding details: School for Advanced Research, SAR Funding details: Japan Society for the Promotion of Science, JSPS Funding details: Campus France Funding details: Türkiye Atom Enerjisi Kurumu, TAEK Funding details: Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science Funding details: European Research Council, ERC Funding details: Labex Funding details: European Cooperation in Science and Technology, COST Funding details: Science and Technology Facilities Council, STFC Funding details: Leverhulme Trust Funding details: Human Growth Foundation, HGF Funding details: Cummings Foundation, CFI Funding details: Thales Group, Thales Funding details: Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP Funding details: Narodowym Centrum Nauki, NCN Funding details: Max-Planck-Gesellschaft, MPG Funding details: National Natural Science Foundation of China, NSFC Funding details: Bundesministerium für Bildung und Forschung, BMBF Funding details: Natural Sciences and Engineering Research Council of Canada, NSERC, NRC Funding details: Instituto Nazionale di Fisica Nucleare, INFN Funding details: Horizon 2020 Funding details: Nederlandse Organisatie voor Wetenschappelijk Onderzoek, NWO Funding details: Danmarks Grundforskningsfond, DNRF Funding details: Juvenile Diabetes Research Foundation United States of America, JDRF Funding details: Agence Nationale de la Recherche, ANR Funding details: Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq Funding details: Chinese Academy of Sciences, CAS Funding details: Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Funding details: European Geosciences Union, EGU Funding details: Canarie Funding details: European Regional Development Fund, FEDER Funding details: CERN Funding details: Arizona-Nevada Academy of Science, ANAS Funding details: General Secretariat for Research and Technology, GSRT Funding details: Ministry of Education, Culture, Sports, Science and Technology, MEXT Funding details: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF Funding details: Singapore Eye Research Institute, SERI Funding details: Ministry of Education and Science, MES Funding details: Agencia Nacional de Promoción Científica y Tecnológica, ANPCyT Funding details: CRC Health Group, CRC Funding details: Ministerio de Economía y Competitividad, MEC Funding details: Centre National pour la Recherche Scientifique et Technique, CNRST Funding details: Brookhaven National Laboratory, BNL Funding details: TRIUMF Funding details: Alabama Space Grant Consortium, ASGC Funding details: Poultry Industry Council, PIC Funding text 1: 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; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZSˇ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, 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, CRC and Compute Canada, Canada; COST, ERC, ERDF, Horizon 2020, and Marie Sklo dowska-Curie Actions, European Union; Investissements d’ Avenir Labex and Idex, 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 GIF, Israel; CERCA Programme Generalitat de Catalunya, Spain; The Royal Society and Leverhulme Trust, United Kingdom. Funding text 2: 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 (U.K.) and BNL (U.S.A.), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. [72].