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

Fizik Mühendisliği Bölümü

CERN
A. Alikhanian Yerevan Institute of Physics
Austrian Academy of Sciences
Indian Institute of Technology Madras
University of Antwerp
Vrije Universiteit Brussel
Université libre de Bruxelles
Korea University
Ghent University
Université catholique de Louvain
Centro Brasileiro de Pesquisas Físicas
Universidade do Estado do Rio de Janeiro
Universidade Estadual Paulista Júlio de Mesquita Filho
Bulgarian Academy of Sciences
Sofia University St. Kliment Ohridski
Universidad de Tarapacá
Beihang University
Tsinghua University
CAS - Institute of High Energy Physics
California Institute of Technology
University of Florida
Massachusetts Institute of Technology
Peking University
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
University of Split
Ruder Boskovic Institute
University of Cyprus
Charles University
Escuela Politécnica Nacional
Universidad San Francisco de Quito
Academy of Scientific Research and Technology
Al-Fayoum University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
Lappeenranta-Lahti University of Technology
Université Paris-Saclay
Laboratoire Leprince-Ringuet
Institut Pluridisciplinaire Hubert Curien
Institut de Physique des 2 Infinis de Lyon
Seoul National University
Georgian Technical University
RWTH Aachen University
Tata Institute of Fundamental Research
German Electron Synchrotron
Saha Institute of Nuclear Physics
Northwestern University
University of Kansas
University of Hamburg
Karlsruhe Institute of Technology
Demokritos National Centre for Scientific Research
National and Kapodistrian University of Athens
National Technical University of Athens
University of Ioannina
Eotvos Lorand University
Wigner Research Centre for Physics
University of Debrecen
Institute for Nuclear Research
Hungarian University of Agriculture and Life Sciences
Panjab University
University of Delhi
University of Wisconsin-Madison
Homi Bhabha National Institute
Indian Institute of Science Education and Research Pune
Isfahan University of Technology
Institute for Research for Fundamental Sciences
University College Dublin
National Institute for Nuclear Physics
University of Bari
Polytechnic University of Bari
University of Bologna
University of Catania
University of Florence
University of Genoa
University of Milan - Bicocca
University of Naples Federico II
University of Basilicata
University of Padua
University of Pavia
University of Perugia
University of Pisa
Scuola Normale Superiore di Pisa
University of Siena
University of Rome La Sapienza
University of Turin
University of Eastern Piedmont
University of Trieste
Kyungpook National University
University of California at 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
Vilnius University
University of Malaya
Universidad de Sonora
Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
Universidad Iberoamericana (UIA)
Benemerita Universidad Autonoma de Puebla
University of Montenegro
University of Canterbury
Quaid-I-Azam University
AGH University of Krakow
National Centre for Nuclear Research
University of Warsaw
Laboratório de Instrumentação e Física Experimental de Partículas
University of Belgrade
CIEMAT
Universidad Autónoma de Madrid
University of Oviedo
Universidad de Cantabria
University of Colombo
University of Ruhuna
Paul Scherrer Institute
Swiss Federal Institute of Technology Zurich
University of Zurich
National Central University
National Taiwan University
Chulalongkorn University
Cukurova University
Middle East Technical University
Bogazici University
Istanbul Technical University
Istanbul University
NASU - Institute for Single Crystals
NASU - Kharkov Institute of Physics and Technology
University of Bristol
Rutherford Appleton Laboratory
Imperial College London
University of Puerto Rico
Brunel University London
Baylor University
Catholic University of America
University of Alabama
Boston University
Brown University
University of California at Davis
University of California at Los Angeles
University of California at Riverside
University of California at 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
SUNY Buffalo
Northeastern University
University of Notre Dame
Ohio State University
Princeton University
Purdue University
Purdue University Northwest
University of Rochester
Rockefeller University
Rutgers - The State University of New Jersey, New Brunswick
University of Tennessee, Knoxville
Vanderbilt University
University of Virginia
Wayne State University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

65 Atıf (Scopus)

Özet

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.

Orijinal dil	İngilizce
Makale numarası	138290
Dergi	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Hacim	847
DOI'lar	https://doi.org/10.1016/j.physletb.2023.138290
Yayın durumu	Yayınlandı - 10 Ara 2023

Bibliyografik not

Publisher Copyright:
© 2023 The Author(s)

Finansman

Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440 , 724704 , 752730 , 758316 , 765710 , 824093 , 884104 , and COST Action CA16108 (European Union); the Leventis Foundation ; the Alfred P. Sloan Foundation ; the Alexander von Humboldt Foundation ; the Belgian Federal Science Policy Office ; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the “Excellence of Science – EOS” – be.h project n. 30820817 ; the Beijing Municipal Science & Technology Commission , No. Z191100007219010; The Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Hellenic Foundation for Research and Innovation (HFRI), Project Number 2288 (Greece); the Deutsche Forschungsgemeinschaft (DFG), under Germany's Excellence Strategy – EXC 2121 “Quantum Universe” – 390833306 , and under project number 400140256 - GRK2497; the Hungarian Academy of Sciences , the New National Excellence Program - ÚNKP, the NKFIH research grants K 124845 , K 124850 , K 128713 , K 128786 , K 129058 , K 131991 , K 133046 , K 138136 , K 143460 , K 143477 , 2020-2.2.1-ED-2021-00181 , and TKP2021-NKTA-64 (Hungary); the Council of Science and Industrial Research , India; the Latvian Council of Science ; the Ministry of Education and Science , project no. 2022/WK/14 , and the National Science Center , contracts Opus 2021/41/B/ST2/01369 and 2021/43/B/ST2/01552 (Poland); the Fundação para a Ciência e a Tecnologia , grant CEECIND/01334/2018 (Portugal); the National Priorities Research Program by Qatar National Research Fund ; MCIN/AEI/10.13039/501100011033 , ERDF “a way of making Europe”, and the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu , grant MDM-2017-0765 and Programa Severo Ochoa del Principado de Asturias (Spain); the Chulalongkorn Academic into Its 2nd Century Project Advancement Project , and the National Science, Research and Innovation Fund via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation , grant B05F650021 (Thailand); the Kavli Foundation ; the Nvidia Corporation ; the SuperMicro Corporation ; the Welch Foundation , contract C-1845 ; and the Weston Havens Foundation (USA). We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid and other centers for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC, the CMS detector, and the supporting computing infrastructure provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , FAPERGS , and FAPESP (Brazil); MES and BNSF (Bulgaria); CERN ; CAS , MOST , and NSFC (China); Minciencias (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER , ERC PUT and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS / IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRI (Greece); NKFIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP , CINVESTAV , CONACYT , LNS , SEP , and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MES and NSC (Poland); FCT (Portugal); MESTD (Serbia); MCIN/AEI and PCTI (Spain); MoSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); MHESI and NSTDA (Thailand); TUBITAK and TENMAK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA).

Finansörler	Finansör numarası
Chulalongkorn Academic
ERC PUT
Excellence of Science	30820817
GSRI
MSES
MoER
National Science, Research and Innovation Fund	B05F650021
PCTI
Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu	MDM-2017-0765
Programa Severo Ochoa del Principado de Asturias
National Science Foundation
U.S. Department of Energy
Alfred P. Sloan Foundation
Welch Foundation	C-1845
Hispanics in Philanthropy
Kavli Foundation
Maryland Ornithological Society
Alexander von Humboldt-Stiftung
NVIDIA
Qatar National Research Fund	MCIN/AEI/10.13039/501100011033
Ministry of Education and Science	2022/WK/14
Direktion für Entwicklung und Zusammenarbeit
Secretaría de Educación Pública
Weston Havens Foundation
Louisiana Academy of Sciences
CERN
Cosmetic Surgery Foundation
Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu
Science and Technology Facilities Council
European Research Council
European Cooperation in Science and Technology	CA16108
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
Ministry of Education - Singapore
Department of Atomic Energy, Government of India
Taighde Éireann - Research Ireland
Helmholtz-Gemeinschaft
Deutsche Forschungsgemeinschaft	390833306, 400140256 - GRK2497
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
Ministerstvo Školství, Mládeže a Tělovýchovy
National Science Council
Fundação para a Ciência e a Tecnologia	CEECIND/01334/2018
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Academy of Finland
Bundesministerium für Bildung und Forschung
Chinese Academy of Sciences
Austrian Science Fund
Fonds De La Recherche Scientifique - FNRS
Belgian Federal Science Policy Office
Ministry of Science and Technology of the People's Republic of China
Fonds Wetenschappelijk Onderzoek
Agentschap voor Innovatie door Wetenschap en Technologie
Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture
Consejo Nacional de Ciencia y Tecnología
Ministerio de Educación, Cultura y Deporte
Bulgarian National Science Fund
Ministry of Business, Innovation and Employment
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Ministry of Science, ICT and Future Planning
National Research Foundation of Korea
Magyar Tudományos Akadémia
Instituto Nazionale di Fisica Nucleare
A.G. Leventis Foundation
National Science and Technology Development Agency
Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
Narodowe Centrum Nauki	2021/41/B/ST2/01369, 2021/43/B/ST2/01552
Secretaría de Educación Superior, Ciencia, Tecnología e Innovación
Universiti Malaya
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu
Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
Ministry of Science and Technology, Taiwan
National Academy of Sciences of Ukraine
Centre National de la Recherche Scientifique
Ministerio de Ciencia e Innovación
Universidad Autónoma de San Luis Potosí
Latvijas Zinātnes Padome
Ministry of Education and Science
Institute for Research in Fundamental Sciences
Benemérita Universidad Autónoma de Puebla
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Horizon 2020	724704, 758316, 824093, 675440, 752730, 765710, 884104
European Regional Development Fund
Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional
Pakistan Atomic Energy Commission
Ministry of Science,Technology and Research
Beijing Municipal Science and Technology Commission, Adminitrative Commission of Zhongguancun Science Park	Z191100007219010
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal	K 128713, K 143460, K 124850, K 128786, K 131991, K 133046, K 138136, K 129058, K 143477, 2020-2.2.1-ED-2021-00181, K 124845, TKP2021-NKTA-64
Agencia Estatal de Investigación
Institut National de Physique Nucléaire et de Physique des Particules
Hellenic Foundation for Research and Innovation
Ministry of Higher Education, Science, Research and Innovation, Thailand
Laboratorio Nacional de Supercómputo del Sureste de Mexico

Belgeye Erişim

10.1016/j.physletb.2023.138290

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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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 D. Hohov and J. Jaramillo and A. Khalilzadeh and K. Lee and M. Mahdavikhorrami and A. Malara and S. Paredes and L. P{\'e}tr{\'e} and A. Cakir",

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",

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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 - Hohov, D.

AU - Jaramillo, J.

AU - Khalilzadeh, A.

AU - Lee, K.

AU - Mahdavikhorrami, M.

AU - Malara, A.

AU - Paredes, S.

AU - Pétré, L.

AU - Cakir, 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

Özet

Bibliyografik not

Finansman

Belgeye Erişim

Diğer Dosyalar ve Linkler

Parmak izi

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