Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

(ATLAS Collaboration)

doi:10.1103/PhysRevD.97.072003

Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

(ATLAS Collaboration)

Mohamed I University
Aix-Marseille Université
University of Oklahoma
Azerbaijan National Academy of Sciences
Université Paris-Saclay
University of Toronto
University of California at Santa Cruz
University of Sussex
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
The University of Tokyo
AGH University of Science and Technology
Northern Illinois University
Ludwig Maximilian University of Munich
Rutherford Appleton Laboratory
Alexandru Ioan Cuza University of Iaşi
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
NOVA University Lisbon
Boston University
Joint Institute for Nuclear Research
University of Rome Tor Vergata
Kyoto University
Lund University
University of Geneva
RAS - P.N. Lebedev Physics Institute
University of Bologna
University of Victoria BC
Universidad Nacional de La Plata
Radboud University Nijmegen
CERN
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
Czech Technical University in Prague
University of Salento
The University of Chicago
Columbia University
University of Oregon
Council for Scientific and Industrial Research
University of Birmingham
University of Naples Federico II
University of Copenhagen
University of Washington
University of Glasgow
University of Valencia
University of California at Berkeley
Universidade Federal do Rio de Janeiro
University of Oxford
Brandeis University
University of Michigan, Ann Arbor
University of Coimbra
University of Sheffield
University of Texas at Austin
Heidelberg University
University of Bern
University of Milan
Université Clermont Auvergne
University of Amsterdam
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Moscow Engineering Physics Institute
University of California at Irvine
High Energy Accelerator Research Organization, Tsukuba
Michigan State University
Duke University
Royal Holloway University of London
University of Montreal
University of Iowa
Queen Mary University of London
University of Cambridge
University of Bonn
Alikhanov Institute for Theoretical and Experimental Physics
Johannes Gutenberg University Mainz
German Electron Synchrotron
United States Department of Energy
Comenius University
University of Cape Town
University of Illinois
University of Siegen
University of Science and Technology of China
CAS - Institute of High Energy Physics
TRIUMF
CEA-IRFU/CNRS/Université Paris Diderot
University of Rome La Sapienza
Cracow
Simon Fraser University
Yale University
Louisiana Tech University
Weizmann Institute of Science
University of Pennsylvania School of Arts and Sciences
University of Wisconsin-Madison
University of Louisville
University of Wuppertal
University of Melbourne
University of Genoa
Max Planck Institute for Physics (Werner Heisenberg Institute)
University of Innsbruck
SLAC National Accelerator Laboratory
Shanghai Jiao Tong University
Universidad Autónoma de Madrid
Lancaster University
Russian Research Centre Kurchatov Institute
An-Najah National University
California State University Fresno
Ohio State University
CNRS/IN2P3
Tufts University
University of Fribourg
University of Göttingen
New York University
Bahcesehir University
Gaziantep University
Stony Brook University
University College London
Carleton University
University of Hassan II Casablanca
National Center for Energy, Nuclear Science and Technology
Uppsala University
Université Savoie Mont Blanc
Université Grenoble Alpes
University of Massachusetts
Stockholm University
Oskar Klein Centre
University of Manchester
University of Pittsburgh
Humboldt University of Berlin
University of Pisa
Technische Universität Dresden
Pontificia Universidad Católica de Chile
Lomonosov Moscow State University
Institute for High Energy Physics
Chinese University of Hong Kong
Institute for High Energy Physics
Universidad de Buenos Aires
University of Texas at Arlington
Tokyo Metropolitan University
University of Edinburgh
Universidad Técnica Federico Santa Maria
Slovak Academy of Sciences
University of Bergen
University of Freiburg
University of Oslo
University of Liverpool
TU Dortmund University
Academia Sinica - Institute of Physics
SUNY Albany
Ankara University
Indiana University Bloomington
University of Calabria
Oklahoma State University
Charles University
Autonomous University of Barcelona
University of Porto
Istanbul Bilgi University
Roma Tre University
Universidade Federal de Juiz de Fora
Harvard University
Tomsk State University
Iowa State University
Nanjing University
Tsinghua University
The Collaborative Innovation Center of Quantum Matter (CICQM)
Kobe University
University of Chinese Academy of Sciences
Mohammed V University in Rabat
University of Arizona
National Tsing Hua University
Aristotle University of Thessaloniki
Czech Academy of Sciences
McGill University
Palacký University Olomouc
University of Ljubljana
University of Udine
University of Lisbon
University of Naples Parthenope
University of British Columbia
Institute of Particle Physics
University of Alberta
Tbilisi State University
Universidade Federal de São João del-Rei
Universidade de São Paulo
Shandong University
Justus Liebig University Giessen
University of Adelaide
Cadi Ayyad University
University of Warwick
University of Pavia
National and Kapodistrian University of Athens
Peter the Great St. Petersburg Polytechnic University
Southern Methodist University
City University of New York
Nagasaki Institute of Applied Science
University of the Aegean
West University of Timisoara
ICREA
University of New Mexico
Bogazici University
University of Tsukuba
A. Alikhanian Yerevan Institute of Physics
University of Würzburg
Osaka University
Belarus Academy of Sciences
Shinshu University
University of the Witwatersrand
Nagoya University
Belarusian State University
Waseda University
Tokyo Institute of Technology
INFN-TIFPA
University of Trento
University of Texas at Dallas
Georgian National Academy of Sciences
Ilia State University
York University
KTH Royal Institute of Technology
Kyushu University
Georgian Technical University
Ochanomizu University
Manhattan College
University of Belgrade
Istanbul Aydin University
Hellenic Open University
Hong Kong University of Science and Technology
University of Sydney
The University of Hong Kong
Universidad Antonio Nariño
California State University Sacramento
Moscow Institute of Physics and Technology
Hiroshima Institute of Technology
Okayama University
University of Minho
Jagiellonian University in Kraków
National Institute for Research and Development of Isotopic and Molecular Technologies
University Politehnica of Bucharest
IN2P3 - Institut National de Physique Nucléaire et de Physique Des Particules
Sun Yat-Sen University
Bulgarian Academy of Sciences
TOBB University of Economics and Technology
Kyoto University of Education
Stanford University
Wigner Research Centre for Physics
Transilvania University of Brasov
Giresun Universitesi
University of Malaya

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

136 Citations (Scopus)

Abstract

A search for the associated production of the Higgs boson with a top quark pair (ttH) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb-1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy s=13 TeV at the Large Hadron Collider. Higgs boson decays to WW∗, ττ, and ZZ∗ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. The best fit for the ttH production cross section is σ(ttH)=790-210+230 fb, in agreement with the Standard Model prediction of 507-50+35 fb. The combination of this result with other ttH searches from the ATLAS experiment using the Higgs boson decay modes to bb, γγ and ZZ∗→4, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the ttH production mode.

Original language	English
Article number	072003
Journal	Physical Review D
Volume	97
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.97.072003
Publication status	Published - 1 Apr 2018

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevD.97.072003

Cite this

@article{3a8f2983ee0746dca6a247e769f3dd62,

title = "Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector",

abstract = "A search for the associated production of the Higgs boson with a top quark pair (ttH) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb-1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy s=13 TeV at the Large Hadron Collider. Higgs boson decays to WW∗, ττ, and ZZ∗ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. The best fit for the ttH production cross section is σ(ttH)=790-210+230 fb, in agreement with the Standard Model prediction of 507-50+35 fb. The combination of this result with other ttH searches from the ATLAS experiment using the Higgs boson decay modes to bb, γγ and ZZ∗→4, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the ttH production mode.",

author = "\{(ATLAS Collaboration)\} and M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B. Abeloos 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 T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, \{J. A.\} and Ahlen, \{S. P.\} 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 Alderweireldt, \{S. C.\} and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and G. Alexander and T. Alexopoulos and M. Alhroob and B. Ali and M. Aliev and G. Alimonti and J. Alison and Alkire, \{S. P.\} and C. Allaire and Allbrooke, \{B. M.M.\} and Allen, \{B. W.\} and Connell, \{S. H.\} and N. Govender and L. Truong",

note = "Publisher Copyright: {\textcopyright} 2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.",

year = "2018",

month = apr,

day = "1",

doi = "10.1103/PhysRevD.97.072003",

language = "English",

volume = "97",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "7",

}

TY - JOUR

T1 - Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

AU - (ATLAS Collaboration)

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B.

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 - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahlen, S. P.

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. C.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Ali, B.

AU - Aliev, M.

AU - Alimonti, G.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allaire, C.

AU - Allbrooke, B. M.M.

AU - Allen, B. W.

AU - Connell, S. H.

AU - Govender, N.

AU - Truong, L.

N1 - Publisher Copyright: © 2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - A search for the associated production of the Higgs boson with a top quark pair (ttH) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb-1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy s=13 TeV at the Large Hadron Collider. Higgs boson decays to WW∗, ττ, and ZZ∗ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. The best fit for the ttH production cross section is σ(ttH)=790-210+230 fb, in agreement with the Standard Model prediction of 507-50+35 fb. The combination of this result with other ttH searches from the ATLAS experiment using the Higgs boson decay modes to bb, γγ and ZZ∗→4, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the ttH production mode.

AB - A search for the associated production of the Higgs boson with a top quark pair (ttH) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb-1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy s=13 TeV at the Large Hadron Collider. Higgs boson decays to WW∗, ττ, and ZZ∗ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. The best fit for the ttH production cross section is σ(ttH)=790-210+230 fb, in agreement with the Standard Model prediction of 507-50+35 fb. The combination of this result with other ttH searches from the ATLAS experiment using the Higgs boson decay modes to bb, γγ and ZZ∗→4, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the ttH production mode.

UR - https://www.scopus.com/pages/publications/85046831163

U2 - 10.1103/PhysRevD.97.072003

DO - 10.1103/PhysRevD.97.072003

M3 - Article

AN - SCOPUS:85046831163

SN - 2470-0010

VL - 97

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 072003

ER -

Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this