Observation of four top quark production in proton-proton collisions at s=13TeV

The CMS collaboration

doi:10.1016/j.physletb.2023.138290

Observation of four top quark production in proton-proton collisions at s=13TeV

The CMS collaboration

European Organization for Nuclear Research
Yerevan Physics Institute
Institut für Hochenergiephysik
Indian Institute of Technology Madras
University of Antwerp
Vrjie Universiteit Brussel
Université Libre de Bruxelles
Korea University
Ghent University
University of Louvain
Centro Brasileiro de Pesquisas Fisicas
Rua São Francisco de Xavier
São Paulo State University
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
University of Sofia
Universidad de Tarapacá
Beihang University
Tsinghua University
Institute of High Energy Physics, Chinese Academy of Sciences
California Institute of Technology
University of Florida
Massachusetts Institute of Technology
State Key Laboratory of Nuclear Physics and Technology
Sun Yat-Sen University
University of Science and Technology of China
Fudan University
Rice University
Zhejiang University
Universidad de Los Andes, Colombia
Universidad de Antioquia
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split
Faculty of Science, University of Split
Ruđer Bošković Institute
University of Cyprus
Charles University
Escuela Politecnica Nacional
Universidad San Francisco de Quito
Egyptian Network of High Energy Physics
Fayoum University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
LUT University
Université Paris-Saclay
Ip Paris
Université de Strasbourg
Institut de Physique des 2 Infinis de Lyon
Seoul National University
Georgian Technical University
RWTH Aachen University
Tata Institute of Fundamental Research, Mumbai
c/o DESY
Saha Institute of Nuclear Physics
Northwestern University
University of Kansas
Universität Hamburg
Institute of Meteorology and Climate Research
NCSR Demokritos
University of Athens
National Technical University of Athens
University of Ioannina
Eötvös Loránd University
Wigner Research Centre for Physics
University of Debrecen
Institute of Nuclear Research ATOMKI
Eszterhazy Karoly University
Panjab University
University of Delhi
University of Wisconsin-Madison
An OCC of Homi Bhabha National Institute
Indian Institute of Science Education and Research (IISER)
Isfahan University of Technology
Institute for Research in Fundamental Sciences (IPM)
University College Dublin
INFN Sezione di Bari
Università degli studi di Bari Aldo Moro
Politecnico di Bari
INFN Sezione di Bologna
University of Bologna
INFN Sezione di Catania
Università degli Studi di Catania
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
University of Florence
LNF-INFN
Sezione di Genova
University of Genoa
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
INFN Sezione di Napoli
University of Naples Federico II
Università degli Studi della Basilicata
INFN
University of Padova
INFN Sezione di Pavia
University of Pavia
INFN Sezione di Perugia
University of Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Pisa
Scuola Normale Superiore di Pisa
University of Siena
Sezione di Roma
University of Rome
INFN Sezione di Torino
University of Turin
Laboratory of Molecular Pathology
INFN Sezione di Trieste
University of Trieste
Kyungpook National University
University of California, Santa Barbara
Sungkyunkwan University
Texas Tech University
Chonnam National University
Texas A&M University
Hanyang University
Kansas State University
Sejong University
University of Illinois at Chicago
Kyung Hee University
University of Seoul
Florida State University
Yonsei University
American University of the Middle East
Riga Technical University
University of Latvia (LU)
Vilnius University
University Malaya
Universidad de Sonora
CINVESTAV-IPN
Universidad Iberoamericana
Benemerita Universidad Autonoma de Puebla
University of Montenegro
University of Canterbury
Quaid-i-Azam University
Agh University of Science and Technology Faculty of Computer Science
National Centre for Nuclear Research
University of Warsaw
Lisboa
University of Belgrade
University of Belgrade
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
Universidad Autónoma de Madrid
University of Oviedo
CSIC-Univ. Cantabria
University of Colombo
University of Ruhuna
Paul Scherrer Institut
ETH Zurich
University of Zurich
National Central University
National Taiwan University
Chulalongkorn University
Cukurova University
Middle East Technical University (METU)
Bogazici University
Istanbul Technical University
Istanbul University
Academy of Science of Ukraine
Kharkov Institute of Physics and Technology
University of Bristol
CCLRC Rutherford Appleton Laboratory
Imperial College London
University of Puerto Rico
Brunel University London
Baylor University
Catholic University of America
University of Alabama
Boston University
Women and Infants Hospital of Rhode Island-Warren Alpert Medical School of Brown University
University of California, Davis
University of California, Los Angeles
University of California, Riverside
University of California, San Diego
Carnegie Mellon University
University of Colorado Boulder
Cornell University
Fermi National Accelerator Laboratory
Florida Institute of Technology
University of Iowa
Johns Hopkins University
Lawrence Livermore National Laboratory
University of Maryland, College Park
University of Minnesota Twin Cities
University of Mississippi
University of Nebraska-Lincoln
University at Buffalo, The State University of New York
Northeastern University
University of Notre Dame
The Ohio State University
Princeton University
Purdue University
Purdue University Northwest
University of Rochester
The Rockefeller University
Rutgers University–New Brunswick
University of Tennessee
Vanderbilt University
University of Virginia
Wayne State University

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and corresponding to an integrated luminosity of 138fb⁻¹. Events with two same-sign, three, or four charged leptons (electrons and muons) and additional jets are analyzed. Compared to previous results in these channels, updated identification techniques for charged leptons and jets originating from the hadronization of b quarks, as well as a revised multivariate analysis strategy to distinguish the signal process from the main backgrounds, lead to an improved expected signal significance of 4.9 standard deviations above the background-only hypothesis. Four top quark production is observed with a significance of 5.6 standard deviations, and its cross section is measured to be 17.7_−3.5^+3.7(stat)_−1.9^+2.3(syst)fb, in agreement with the available standard model predictions.

langue originale	Anglais
Numéro d'article	138290
journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	847
Les DOIs	https://doi.org/10.1016/j.physletb.2023.138290
état	Publié - 10 déc. 2023

Accès au document

10.1016/j.physletb.2023.138290

Autres fichiers et liens

Lien vers la publication dans Scopus

Contient cette citation

@article{8155b36b271d46c6b4ad1b9897b2dd99,

title = "Observation of four top quark production in proton-proton collisions at s=13TeV",

abstract = "The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and corresponding to an integrated luminosity of 138fb−1. Events with two same-sign, three, or four charged leptons (electrons and muons) and additional jets are analyzed. Compared to previous results in these channels, updated identification techniques for charged leptons and jets originating from the hadronization of b quarks, as well as a revised multivariate analysis strategy to distinguish the signal process from the main backgrounds, lead to an improved expected signal significance of 4.9 standard deviations above the background-only hypothesis. Four top quark production is observed with a significance of 5.6 standard deviations, and its cross section is measured to be 17.7−3.5+3.7(stat)−1.9+2.3(syst)fb, in agreement with the available standard model predictions.",

keywords = "CMS, Top quark",

author = "\{The CMS collaboration\} and A. Hayrapetyan and A. Tumasyan and W. Adam and Andrejkovic, \{J. W.\} and T. Bergauer and S. Chatterjee and K. Damanakis and M. Dragicevic and \{Escalante Del Valle\}, A. and Hussain, \{P. S.\} and M. Jeitler and N. Krammer and D. Liko and I. Mikulec and J. Schieck and R. Sch{\"o}fbeck and D. Schwarz and M. Sonawane and S. Templ and W. Waltenberger and Wulz, \{C. E.\} and Darwish, \{M. R.\} and T. Janssen and \{Van Mechelen\}, P. and Bols, \{E. S.\} and J. D'Hondt and S. Dansana and \{De Moor\}, A. and M. Delcourt and \{El Faham\}, H. and S. Lowette and I. Makarenko and D. M{\"u}ller and Sahasransu, \{A. R.\} and S. Tavernier and M. Tytgat and \{Van Putte\}, S. and D. Vannerom and B. Clerbaux and \{De Lentdecker\}, G. and L. Favart and A. Cappati and O. Davignon and \{De Wit\}, A. and \{Granier de Cassagnac\}, R. and M. Nguyen and C. Ochando and R. Salerno and A. Zabi and A. Zghiche",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s)",

year = "2023",

month = dec,

day = "10",

doi = "10.1016/j.physletb.2023.138290",

language = "English",

volume = "847",

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

issn = "0370-2693",

}

TY - JOUR

T1 - Observation of four top quark production in proton-proton collisions at s=13TeV

AU - The CMS collaboration

AU - Hayrapetyan, A.

AU - Tumasyan, A.

AU - Adam, W.

AU - Andrejkovic, J. W.

AU - Bergauer, T.

AU - Chatterjee, S.

AU - Damanakis, K.

AU - Dragicevic, M.

AU - Escalante Del Valle, A.

AU - Hussain, P. S.

AU - Jeitler, M.

AU - Krammer, N.

AU - Liko, D.

AU - Mikulec, I.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Schwarz, D.

AU - Sonawane, M.

AU - Templ, S.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Darwish, M. R.

AU - Janssen, T.

AU - Van Mechelen, P.

AU - Bols, E. S.

AU - D'Hondt, J.

AU - Dansana, S.

AU - De Moor, A.

AU - Delcourt, M.

AU - El Faham, H.

AU - Lowette, S.

AU - Makarenko, I.

AU - Müller, D.

AU - Sahasransu, A. R.

AU - Tavernier, S.

AU - Tytgat, M.

AU - Van Putte, S.

AU - Vannerom, D.

AU - Clerbaux, B.

AU - De Lentdecker, G.

AU - Favart, L.

AU - Cappati, A.

AU - Davignon, O.

AU - De Wit, A.

AU - Granier de Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Salerno, R.

AU - Zabi, A.

AU - Zghiche, A.

PY - 2023/12/10

Y1 - 2023/12/10

N2 - The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and corresponding to an integrated luminosity of 138fb−1. Events with two same-sign, three, or four charged leptons (electrons and muons) and additional jets are analyzed. Compared to previous results in these channels, updated identification techniques for charged leptons and jets originating from the hadronization of b quarks, as well as a revised multivariate analysis strategy to distinguish the signal process from the main backgrounds, lead to an improved expected signal significance of 4.9 standard deviations above the background-only hypothesis. Four top quark production is observed with a significance of 5.6 standard deviations, and its cross section is measured to be 17.7−3.5+3.7(stat)−1.9+2.3(syst)fb, in agreement with the available standard model predictions.

AB - The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and corresponding to an integrated luminosity of 138fb−1. Events with two same-sign, three, or four charged leptons (electrons and muons) and additional jets are analyzed. Compared to previous results in these channels, updated identification techniques for charged leptons and jets originating from the hadronization of b quarks, as well as a revised multivariate analysis strategy to distinguish the signal process from the main backgrounds, lead to an improved expected signal significance of 4.9 standard deviations above the background-only hypothesis. Four top quark production is observed with a significance of 5.6 standard deviations, and its cross section is measured to be 17.7−3.5+3.7(stat)−1.9+2.3(syst)fb, in agreement with the available standard model predictions.

KW - CMS

KW - Top quark

UR - https://www.scopus.com/pages/publications/85182843712

U2 - 10.1016/j.physletb.2023.138290

DO - 10.1016/j.physletb.2023.138290

M3 - Article

AN - SCOPUS:85182843712

SN - 0370-2693

VL - 847

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

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

M1 - 138290

ER -

Observation of four top quark production in proton-proton collisions at s=13TeV

Résumé

Accès au document

Autres fichiers et liens

Empreinte digitale

Contient cette citation