Search for production of four top quarks in final states with same-sign or multiple leptons in proton-proton collisions at s = 13 TeV

. 2020 ; 80 (2) : 75. [epub] 20200131

Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid32108833

The standard model (SM) production of four top quarks ( t t ¯ t t ¯ ) in proton-proton collisions is studied by the CMS Collaboration. The data sample, collected during the 2016-2018 data taking of the LHC, corresponds to an integrated luminosity of 137 fb - 1 at a center-of-mass energy of 13 TeV . The events are required to contain two same-sign charged leptons (electrons or muons) or at least three leptons, and jets. The observed and expected significances for the t t ¯ t t ¯ signal are respectively 2.6 and 2.7 standard deviations, and the t t ¯ t t ¯ cross section is measured to be 12 . 6 - 5.2 + 5.8 fb . The results are used to constrain the Yukawa coupling of the top quark to the Higgs boson, y t , yielding a limit of | y t / y t SM | < 1.7 at 95 % confidence level, where y t SM is the SM value of y t . They are also used to constrain the oblique parameter of the Higgs boson in an effective field theory framework, H ^ < 0.12 . Limits are set on the production of a heavy scalar or pseudoscalar boson in Type-II two-Higgs-doublet and simplified dark matter models, with exclusion limits reaching 350-470 GeV and 350-550 GeV for scalar and pseudoscalar bosons, respectively. Upper bounds are also set on couplings of the top quark to new light particles.

Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt

AGH University of Science and Technology Faculty of Computer Science Electronics and Telecommunications Kraków Poland

Baylor University Waco USA

Beihang University Beijing China

Benemerita Universidad Autonoma de Puebla Puebla Mexico

Bhabha Atomic Research Centre Mumbai India

Bogazici University Istanbul Turkey

Boston University Boston USA

Brown University Providence USA

Brunel University Uxbridge UK

California Institute of Technology Pasadena USA

Carnegie Mellon University Pittsburgh USA

Catholic University of America Washington DC USA

Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules CNRS IN2P3 Villeurbanne France

Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil

Centro de Investigacion y de Estudios Avanzados del IPN Mexico City Mexico

Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid Spain

CERN European Organization for Nuclear Research Geneva Switzerland

Charles University Prague Czech Republic

Chonnam National University Institute for Universe and Elementary Particles Kwangju Korea

Chulalongkorn University Faculty of Science Department of Physics Bangkok Thailand

Cornell University Ithaca USA

Department of Physics Kyung Hee University Seoul Korea

Department of Physics University of Helsinki Helsinki Finland

Department of Physics University of Ruhuna Matara Sri Lanka

Deutsches Elektronen Synchrotron Hamburg Germany

Escuela Politecnica Nacional Quito Ecuador

Eszterhazy Karoly University Karoly Robert Campus Gyongyos Hungary

ETH Zurich Institute for Particle Physics and Astrophysics Zurich Switzerland

Fermi National Accelerator Laboratory Batavia USA

Florida Institute of Technology Melbourne USA

Florida International University Miami USA

Florida State University Tallahassee USA

Georgian Technical University Tbilisi Georgia

Ghent University Ghent Belgium

Hanyang University Seoul Korea

Helsinki Institute of Physics Helsinki Finland

Imperial College London UK

Indian Institute of Science Bangalore India

Indian Institute of Science Education and Research Pune India

Indian Institute of Technology Madras Chennai India

INFN Laboratori Nazionali di Frascati Frascati Italy

INFN Sezione di Bari Università di Bari Politecnico di Bari Bari Italy

INFN Sezione di Bologna Università di Bologna Bologna Italy

INFN Sezione di Catania Università di Catania Catania Italy

INFN Sezione di Firenze Università di Firenze Firenze Italy

INFN Sezione di Genova Università di Genova Genoa Italy

INFN Sezione di Milano Bicocca Università di Milano Bicocca Milan Italy

INFN Sezione di Napoli Università di Napoli 'Federico II' Napoli Italy Università della Basilicata Potenza Italy Università G Marconi Rome Italy

INFN Sezione di Padova Università di Padova Padova Italy Università di Trento Trento Italy

INFN Sezione di Pavia Università di Pavia Pavia Italy

INFN Sezione di Perugia Università di Perugia Perugia Italy

INFN Sezione di Pisa Università di Pisa Scuola Normale Superiore di Pisa Pisa Italy

INFN Sezione di Roma Sapienza Università di Roma Rome Italy

INFN Sezione di Torino Università di Torino Torino Italy Università del Piemonte Orientale Novara Italy

INFN Sezione di Trieste Università di Trieste Trieste Italy

Institut für Hochenergiephysik Wien Austria

Institute for High Energy Physics of National Research Centre 'Kurchatov Institute' Protvino Russia

Institute for Nuclear Problems Minsk Belarus

Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria

Institute for Nuclear Research Moscow Russia

Institute for Research in Fundamental Sciences Tehran Iran

Institute for Scintillation Materials of National Academy of Science of Ukraine Kharkov Ukraine

Institute for Theoretical and Experimental Physics named by A 1 Alikhanov of NRC 'Kurchatov Institute' Moscow Russia

Institute of Experimental Physics Faculty of Physics University of Warsaw Warsaw Poland

Institute of High Energy Physics Beijing China

Institute of Nuclear and Particle Physics NCSR Demokritos Aghia Paraskevi Greece

Institute of Nuclear Research ATOMKI Debrecen Hungary

Institute of Physics University of Debrecen Debrecen Hungary

Institute Rudjer Boskovic Zagreb Croatia

Instituto de Física de Cantabria CSIC Universidad de Cantabria Santander Spain

IRFU CEA Université Paris Saclay Gif sur Yvette France

Istanbul Technical University Istanbul Turkey

Istanbul University Istanbul Turkey

Johns Hopkins University Baltimore USA

Joint Institute for Nuclear Research Dubna Russia

Kansas State University Manhattan USA

Karlsruher Institut fuer Technologie Karlsruhe Germany

Korea University Seoul Korea

Kyungpook National University Daegu Korea

Laboratoire Leprince Ringuet CNRS IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France

Laboratório de Instrumentação e Física Experimental de Partículas Lisbon Portugal

Lappeenranta University of Technology Lappeenranta Finland

Lawrence Livermore National Laboratory Livermore USA

Massachusetts Institute of Technology Cambridge USA

Middle East Technical University Physics Department Ankara Turkey

Moscow Institute of Physics and Technology Moscow Russia

MTA ELTE Lendület CMS Particle and Nuclear Physics Group Eötvös Loránd University Budapest Hungary

National and Kapodistrian University of Athens Athens Greece

National Central University Chung Li Taiwan

National Centre for Nuclear Research Swierk Poland

National Centre for Particle Physics Universiti Malaya Kuala Lumpur Malaysia

National Centre for Physics Quaid 1 Azam University Islamabad Pakistan

National Institute of Chemical Physics and Biophysics Tallinn Estonia

National Institute of Science Education and Research HBNI Bhubaneswar India

National Research Nuclear University 'Moscow Engineering Physics Institute' Moscow Russia

National Research Tomsk Polytechnic University Tomsk Russia

National Scientific Center Kharkov Institute of Physics and Technology Kharkov Ukraine

National Taiwan University Taipei Taiwan

National Technical University of Athens Athens Greece

Northeastern University Boston USA

Northwestern University Evanston USA

Novosibirsk State University Novosibirsk Russia

P N Lebedev Physical Institute Moscow Russia

Panjab University Chandigarh India

Paul Scherrer Institut Villigen Switzerland

Petersburg Nuclear Physics Institute Gatchina Russia

Princeton University Princeton USA

Purdue University Northwest Hammond USA

Purdue University West Lafayette USA

Rice University Houston USA

Riga Technical University Riga Latvia

Rutgers The State University of New Jersey Piscataway USA

Rutherford Appleton Laboratory Didcot UK

RWTH Aachen University 1 Physikalisches Institut Aachen Germany

RWTH Aachen University 3 Physikalisches Institut A Aachen Germany

RWTH Aachen University 3 Physikalisches Institut B Aachen Germany

Saha Institute of Nuclear Physics HBNI Kolkata India

Sejong University Seoul Korea

Seoul National University Seoul Korea

Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russia

State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China

State University of New York at Buffalo Buffalo USA

Sungkyunkwan University Suwon Korea

Tata Institute of Fundamental Research A Mumbai India

Tata Institute of Fundamental Research B Mumbai India

Tbilisi State University Tbilisi Georgia

Texas A and M University College Station USA

Texas Tech University Lubbock USA

The Ohio State University Columbus USA

The University of Alabama Tuscaloosa USA

The University of Iowa Iowa City USA

The University of Kansas Lawrence USA

Tomsk State University Tomsk Russia

Tsinghua University Beijing China

ukurova University Physics Department Science and Art Faculty Adana Turkey

Universidad Autónoma de Madrid Madrid Spain

Universidad Autónoma de San Luis Potosí San Luis Potosí Mexico

Universidad de Antioquia Medellin Colombia

Universidad de Los Andes Bogotá Colombia

Universidad de Oviedo Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias Oviedo Spain

Universidad de Sonora Hermosillo Mexico

Universidad Iberoamericana Mexico City Mexico

Universidad San Francisco de Quito Quito Ecuador

Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil

Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil

Universität Zürich Zurich Switzerland

Université Catholique de Louvain Louvain la Neuve Belgium

Université de Lyon Université Claude Bernard Lyon 1 CNRS IN2P3 Institut de Physique Nucléaire de Lyon Villeurbanne France

Université de Strasbourg CNRS IPHC UMR 7178 Strasbourg France

Université Libre de Bruxelles Brussels Belgium

Universiteit Antwerpen Antwerp Belgium

University College Dublin Dublin Ireland

University of Auckland Auckland New Zealand

University of Belgrade Faculty of Physics and VINCA Institute of Nuclear Sciences Belgrad Serbia

University of Bristol Bristol UK

University of California Davis USA

University of California Los Angeles USA

University of California Riverside Riverside USA

University of California San Diego La Jolla USA

University of California Santa Barbara Department of Physics Santa Barbara USA

University of Canterbury Christchurch New Zealand

University of Colombo Colombo Sri Lanka

University of Colorado Boulder Boulder USA

University of Cyprus Nicosia Cyprus

University of Delhi Delhi India

University of Florida Gainesville USA

University of Hamburg Hamburg Germany

University of Illinois at Chicago Chicago USA

University of Ioánnina Ioannina Greece

University of Maryland College Park USA

University of Minnesota Minneapolis USA

University of Mississippi Oxford USA

University of Montenegro Podgorica Montenegro

University of Nebraska Lincoln Lincoln USA

University of Notre Dame Notre Dame USA

University of Puerto Rico Mayaguez USA

University of Rochester Rochester USA

University of Seoul Seoul Korea

University of Sofia Sofia Bulgaria

University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia

University of Split Faculty of Science Split Croatia

University of Tennessee Knoxville USA

University of Virginia Charlottesville USA

University of Wisconsin Madison Madison WI USA

Vanderbilt University Nashville USA

Vilnius University Vilnius Lithuania

Vrije Universiteit Brussel Brussels Belgium

Wayne State University Detroit USA

Wigner Research Centre for Physics Budapest Hungary

Yerevan Physics Institute Yerevan Armenia

Zhejiang University Hangzhou China

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