Evidence for the H → bb decay with the ATLAS detector

The ATLAS collaboration

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108 Scopus citations

Abstract

A search for the decay of the Standard Model Higgs boson into a bb pair when produced in association with a W or Z boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 36.1 fb-1, were collected in proton-proton collisions in Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13TeV. Final states containing zero, one and two charged leptons (electrons or muons) are considered, targeting the decays Z → νν, W → ℓν and Z → ℓℓ. For a Higgs boson mass of 125 GeV, an excess of events over the expected background from other Standard Model processes is found with an observed significance of 3.5 standard deviations, compared to an expectation of 3.0 standard deviations. This excess provides evidence for the Higgs boson decay into b-quarks and for its production in association with a vector boson. The combination of this result with that of the Run 1 analysis yields a ratio of the measured signal events to the Standard Model expectation equal to 0.90 ± 0.18(stat.)+0.21 -0.19(syst.). Assuming the Standard Model production cross-section, the results are consistent with the value of the Yukawa coupling to b-quarks in the Standard Model.

Original languageEnglish
Article number24
Pages (from-to)1-69
Number of pages69
JournalJournal of High Energy Physics
Volume2017
Issue number12
DOIs
StatePublished - 1 Dec 2017

Funding

FundersFunder number
AvH Foundation
Benoziyo Center, Israel
CEA-DSM/IRFU
Canada Council
Cantons of Bern and Geneva
DNSRCIN2P3-CNRS
DST/NRF
EU-ESF
In-vestissements d’Avenir Labex
MES of Russia
MESTD
MNE/IFA
MSMT
MSSR
Marie Sklo dowska-Curie Actions
Minerva, Israel
RGC
Région Auvergne
VSC CR
National Science Foundation1624739, 1707971, 1404209
National Science Foundation
U.S. Department of Energy
Semiconductor Research Corporation
Biomedical Research Foundation of Northwest Louisiana
Human Growth Foundation
Massachusetts Department of Fish and Game
Alabama Space Grant Consortium
Fuel Cell Technologies Program
Brookhaven National Laboratory
Appalachian Regional Commission
Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)
Ontario Innovation Trust
Canarie
Poultry Industry Council
National Research Council Sri Lanka
Horizon 2020 Framework Programme645479
Horizon 2020 Framework Programme
Biomedical Research Foundation
Arizona-Nevada Academy of Science
CERN
Compute Canada
National Research Council
College of Arts and Sciences, University of Nebraska-Lincoln
Glycemic Index Foundation
Natural Sciences and Engineering Research Council of Canada
Canada Foundation for Innovation
Science and Technology Facilities CouncilST/J005533/1, ST/I005846/1, ST/N000307/1, ST/K001361/1, ST/N000331/1, ST/H001158/2, ST/K003666/1, GRIDPP, ST/L005662/1, PP/E000452/1, ST/J004804/1, ST/J00488X/1, ST/M006417/1, ST/H001158/1, 1653101, ST/K001329/1, ST/N000277/1, 1659192, 1668509
Science and Technology Facilities Council
Leverhulme Trust
Royal Society
British Skin Foundation
Japan Society for the Promotion of Science London
European Commission
European Research Council
Australian Research Council
National Stroke Foundation
Capital Markets CRC Limited
Singapore Eye Research Institute
Central Remedial Clinic
Helmholtz-Gemeinschaft
Deutsche Forschungsgemeinschaft
Agence Nationale de la Recherche
Japan Society for the Promotion of Science26247038, 17K05464, 15K17633, 15H02092
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Danmarks Grundforskningsfond
German-Israeli Foundation for Scientific Research and Development
Canada Foundation for Innovation
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
Fundação para a Ciência e a Tecnologia
Bundesministerium für Bildung und Forschung
Chinese Academy of Sciences
Austrian Science Fund
Generalitat de Catalunya
Comisión Nacional de Investigación Científica y Tecnológica
Agencia Nacional de Promoción Científica y Tecnológica
Fonds Québécois de la Recherche sur la Nature et les Technologies
Ministerstvo Zdravotnictví Ceské Republiky
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerio de Economía y Competitividad
Generalitat Valenciana
Bundesministerium für Wissenschaft, Forschung und Wirtschaft
General Secretariat for Research and Technology
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Ministry of Science and Technology
Joint Institute for Nuclear Research
Israel Science Foundation
Instituto Nazionale di Fisica Nucleare
Max-Planck-Gesellschaft
Narodowe Centrum Nauki
Javna Agencija za Raziskovalno Dejavnost RS
Narodowym Centrum Nauki
Ministerstwo Nauki i Szkolnictwa Wyższego
Shota Rustaveli National Science Foundation
Israeli Centers for Research Excellence
Centre National pour la Recherche Scientifique et Technique
Horizon 2020
British Columbia Knowledge Development Fund
European Regional Development Fund
Marianne and Marcus Wallenberg Foundation
Fondation Partager le Savoir
National Research Center "Kurchatov Institute"
Ministry of Health of the Russian Federation

    Keywords

    • Hadron-Hadron scattering (experiments)
    • Higgs physics

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