Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

The ATLAS collaboration

doi:10.1016/j.physletb.2018.07.035

Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

The ATLAS collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

306 Scopus citations

Abstract

The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb⁻¹, and considering Higgs boson decays into bb¯, WW^⁎, τ⁺τ⁻, γγ, and ZZ^⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb⁻¹ at 7 TeV and 20.3 fb⁻¹ at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) ₋₁₀₀ ⁺¹¹⁰ (syst.) fb, in agreement with the Standard Model prediction.

Original language	English
Pages (from-to)	173-191
Number of pages	19
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	784
DOIs	https://doi.org/10.1016/j.physletb.2018.07.035
State	Published - 10 Sep 2018

Funding

Funders	Funder number
Departamento Administrativo de Ciencia, Tecnología e Innovación
Agence Nationale de la Recherche
Australian Research Council
Ministry of Education and Science
Centre National pour la Recherche Scientifique et Technique
Fundação para a Ciência e a Tecnologia
Labex
Comisión Nacional de Investigación Científica y Tecnológica
University of Washington College of Arts and Sciences
Narodowe Centrum Nauki
CEA-DRF
H2020 Marie Skłodowska-Curie Actions
Région Auvergne
American Roentgen Ray Society
Japan Society for the Promotion of Science
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministry of Science and Technology, Taiwan
Israel Science Foundation
Wallenberg Foundation
Society of Abdominal Radiology
Cummings Foundation
Leverhulme Trust
Arizona-Nevada Academy of Science
Javna Agencija za Raziskovalno Dejavnost RS
Generalitat de Catalunya
Instituto Nazionale di Fisica Nucleare
Bundesministerium für Wissenschaft, Forschung und Wirtschaft
Austrian Science Fund
Biomedical Research Foundation of Northwest Louisiana
Department of Science and Technology, Ministry of Science and Technology, India
MSMT
Türkiye Atom Enerjisi Kurumu
MSSR
Ministerio de Economía y Competitividad
Azərbaycan Respirator Cəmiyyəti
Max-Planck-Gesellschaft
Bundesministerium für Bildung und Forschung
Northern Ireland Community Relations Council
Canada Foundation for Innovation
Helmholtz-Gemeinschaft
Danmarks Grundforskningsfond
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Czech Republic
Singapore Eye Research Institute
Canarie
Ontario Innovation Trust
MIZŠ
Deutsche Forschungsgemeinschaft
United States-Israel Binational Science Foundation
European Commission
Neurosurgical Research Foundation
Ministry of Science and Technology
Thales Group
MESTD
U.S. Department of Energy
EU-ESF
RGC
National Research Council
Bundesministerium für Bildung und Frauen
Fundação de Amparo à Pesquisa do Estado de São Paulo
Human Growth Foundation
National Science Foundation	1812377, 1624739
Israeli Centers for Research Excellence
Biomedical Research Foundation
Karolinska Institutet
MES of Russia
California Department of Fish and Wildlife
National Research Center "Kurchatov Institute"
Institutul de Fizică Atomică
Bloom's Syndrome Foundation
Natural Sciences and Engineering Research Council of Canada
Seventh Framework Programme	335696
General Secretariat for Research and Technology
Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science
Fundació Catalana de Trasplantament
Iowa Science Foundation
Scientific Education and Research Institute
Consejo Nacional de Innovación, Ciencia y Tecnología
German-Israeli Foundation for Scientific Research and Development
Narodowym Centrum Nauki
Strategic Research Council
Fonds Québécois de la Recherche sur la Nature et les Technologies
Cantons of Bern and Geneva
Canada Council for the Arts
Chinese Academy of Sciences
VSC CR
Glycemic Index Foundation
Compute Canada
MNE
Agencia Nacional de Promoción Científica y Tecnológica
Royal Society
Minerva Foundation
European Research Council
European Regional Development Fund
Ministerstwo Nauki i Szkolnictwa Wyższego
IRFU
Generalitat Valenciana
CERN
Joint Institute for Nuclear Research
Fondation Partager le Savoir
National Research Council Canada
Ministerstvo Průmyslu a Obchodu
Alexander von Humboldt-Stiftung
Council on grants of the President of the Russian Federation
Horizon 2020
British Columbia Knowledge Development Fund
Ministry of Education, Culture, Sports, Science and Technology
National Natural Science Foundation of China
Not added	ST/J005533/1, 1813540, ST/M000753/1, ST/N000307/1, ST/L003449/1, ST/H001158/2, GRIDPP, ST/K001310/1, ST/L006162/1, ST/N000447/1, ST/J004804/1, ST/K001329/1, ST/N000420/1
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	169025
DNSRC	IN2P3-CNRS

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10.1016/j.physletb.2018.07.035

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@article{f5ebb5b1f6c74fa59280c29c751dfa09,

title = "Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector",

abstract = "The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb−1, and considering Higgs boson decays into bb¯, WW⁎, τ+τ−, γγ, and ZZ⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb−1 at 7 TeV and 20.3 fb−1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100 +110 (syst.) fb, in agreement with the Standard Model prediction.",

author = "{The ATLAS collaboration} and M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B. Abeloos and Abhayasinghe, {D. K.} and Abidi, {S. H.} and AbouZeid, {O. S.} and Abraham, {N. L.} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, {B. S.} and S. Adachi and L. Adamczyk and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, {A. A.} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, {J. A.} and F. Ahmadov and G. Aielli and S. Akatsuka and {\AA}kesson, {T. P.A.} and E. Akilli and Akimov, {A. V.} and Alberghi, {G. L.} and J. Albert and P. Albicocco and {Alconada Verzini}, {M. J.} and S. Alderweireldt and M. Aleksa and Aleksandrov, {I. N.} and L. Barak and G. Bella and Y. Benhammou and Biswal, {J. P.} and T. Cao and H. Cohen and E. Etzion and G. Koren and O. Kuprash and Lutz, {M. S.} and Y. Oren and M. Pitt and D. Reikher and A. Soffer",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s)",

year = "2018",

month = sep,

day = "10",

doi = "10.1016/j.physletb.2018.07.035",

language = "אנגלית",

volume = "784",

pages = "173--191",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

AU - The ATLAS collaboration

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - AbouZeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adachi, S.

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Alconada Verzini, M. J.

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Barak, L.

AU - Bella, G.

AU - Benhammou, Y.

AU - Biswal, J. P.

AU - Cao, T.

AU - Cohen, H.

AU - Etzion, E.

AU - Koren, G.

AU - Kuprash, O.

AU - Lutz, M. S.

AU - Oren, Y.

AU - Pitt, M.

AU - Reikher, D.

AU - Soffer, A.

PY - 2018/9/10

Y1 - 2018/9/10

N2 - The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb−1, and considering Higgs boson decays into bb¯, WW⁎, τ+τ−, γγ, and ZZ⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb−1 at 7 TeV and 20.3 fb−1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100 +110 (syst.) fb, in agreement with the Standard Model prediction.

AB - The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb−1, and considering Higgs boson decays into bb¯, WW⁎, τ+τ−, γγ, and ZZ⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb−1 at 7 TeV and 20.3 fb−1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100 +110 (syst.) fb, in agreement with the Standard Model prediction.

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U2 - 10.1016/j.physletb.2018.07.035

DO - 10.1016/j.physletb.2018.07.035

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AN - SCOPUS:85051211826

SN - 0370-2693

VL - 784

SP - 173

EP - 191

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

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