Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector

ATLAS Collaboration

doi:10.1103/PhysRevLett.131.151902

Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector

ATLAS Collaboration

Aix-Marseille Université
University of Oklahoma
University of Massachusetts
CERN
University of Göttingen
Royal Holloway University of London
University of Toronto
University of Copenhagen
University of Sussex
Technion-Israel Institute of Technology
University of Oregon
Argonne National Laboratory
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
Johannes Gutenberg University Mainz
Université Grenoble Alpes
AGH University of Krakow
Northern Illinois University
Ludwig Maximilian University of Munich
Bogazici University
University of Geneva
Rutherford Appleton Laboratory
University of California at Santa Cruz
Université Paris-Saclay
Université Clermont Auvergne
Radboud University Nijmegen
Alexandru Ioan Cuza University of Iaşi
University of Alberta
Iowa State University
University of Freiburg
Sorbonne Université
Institute for High Energy Physics
University of Rome La Sapienza
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
Instituto de Física Teórica de la Universidad Autónoma de Madrid
Joint Institute for Nuclear Research
McGill University
University of California at Berkeley
University of Rome Tor Vergata
Kyoto University
Lund University
Russian Academy of Sciences
University of Bologna
University of Victoria BC
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Amsterdam
Czech Technical University in Prague
Academia Sinica - Institute of Physics
Tomsk State University
University of Birmingham
University of Naples Federico II
Universidad Nacional de La Plata
University of Washington
Universidad Autónoma de Madrid
Universidade Federal do Rio de Janeiro
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German Electron Synchrotron
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Oskar Klein Centre
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Novosibirsk State University
Oklahoma State University
University of California at Irvine
High Energy Accelerator Research Organization, Tsukuba
University of Valencia
Universidade Federal de Juiz de Fora
Duke University
University of Montreal
Nagoya University
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The University of Tokyo
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University of Illinois at Urbana-Champaign
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University of Pittsburgh
University of Wuppertal
CAS - Institute of High Energy Physics
TRIUMF
Aristotle University of Thessaloniki
Institute of Nuclear Physics Polish Academy of Sciences
Simon Fraser University
Yale University
University of Belgrade
University of Texas at Arlington
The University of Sydney
Weizmann Institute of Science
University of Bonn
University of Wisconsin-Madison
University of Louisville
University of Melbourne
University of Genoa
University College London
Max Planck Institute for Physics (Werner Heisenberg Institute)
SLAC National Accelerator Laboratory
University of Science and Technology of China
Russian Research Centre Kurchatov Institute
Lancaster University
An-Najah National University
University of Glasgow
Mohammed V University in Rabat
University of Cambridge
University of Siegen
The California State University
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Ivane Javakhishvili Tbilisi State University
Moscow Institute of Physics and Technology
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Ben-Gurion University of the Negev
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University of Naples Parthenope
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Institute of Particle Physics
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Pontificia Universidad Católica de Chile
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University of Texas at Dallas
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INFN-TIFPA
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Nagasaki Institute of Applied Science
California State University Fresno
The University of Chicago
Alikhanov Institute for Theoretical and Experimental Physics
Jagiellonian University in Kraków
University of the Aegean
Lomonosov Moscow State University
Centro Studi e Ricerche Enrico Fermi
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Belarus Academy of Sciences
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SUNY Albany
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Universidad Andrés Bello
Universidad de Tarapacá
Hellenic Open University
Hong Kong University of Science and Technology
The University of Hong Kong
KTH Royal Institute of Technology
Universidad Antonio Nariño
California State University Sacramento
Hiroshima Institute of Technology
Transilvania University of Brasov
National Institute for Research and Development of Isotopic and Molecular Technologies
Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
Universidad Nacional de Colombia
Louisiana Tech University
Bulgarian Academy of Sciences
TOBB University of Economics and Technology
University of Hamburg
Tel Aviv University
Kyoto University of Education
Wigner Research Centre for Physics
Giresun Universitesi

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

123 Scopus citations

Abstract

A search is made for potential ccc̄ c̄ tetraquarks decaying into a pair of charmonium states in the four ffiffi muon final state using proton-proton collision data at ps ¼ 13 TeV, corresponding to an integrated luminosity of 140 fb⁻¹ recorded by the ATLAS experiment at LHC. Two decay channels, J=ψ þ J=ψ → 4μ and J=ψ þ ψ ð2SÞ → 4μ, are studied. Backgrounds are estimated based on a hybrid approach involving Monte Carlo simulations and data-driven methods. Statistically significant excesses with respect to backgrounds dominated by the single parton scattering are seen in the di-J=ψ channel consistent with a narrow resonance at 6.9 GeV and a broader structure at lower mass. A statistically significant excess is also seen in the J=ψ þ ψ ð2SÞ channel. The fitted masses and decay widths of the structures are reported.

Original language	English
Article number	151902
Journal	Physical Review Letters
Volume	131
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.131.151902
State	Published - 13 Oct 2023

Funding

Funders	Funder number
BSF-NSF
Agence Nationale de la Recherche
Australian Research Council
La Caixa Banking Foundation
Centre National pour la Recherche Scientifique et Technique
Fundação para a Ciência e a Tecnologia
Narodowe Centrum Nauki
National Science Foundation
CEA-DRF
H2020 Marie Skłodowska-Curie Actions
Japan Society for the Promotion of Science
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerio de Ciencia e Innovación
Ministry of Science and Technology, Taiwan
Israel Science Foundation
Wallenberg Foundation
Leverhulme Trust
PROMETEO
Staatssekretariat für Bildung, Forschung und Innovation
Javna Agencija za Raziskovalno Dejavnost RS
Generalitat de Catalunya
Instituto Nazionale di Fisica Nucleare
Bundesministerium für Wissenschaft, Forschung und Wirtschaft
Austrian Science Fund
Narodowa Agencja Wymiany Akademickiej
Agencia Nacional de Investigación y Desarrollo
Bundesministerium für Bildung und Forschung
Canada Foundation for Innovation
Helmholtz-Gemeinschaft
Danmarks Grundforskningsfond
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Canarie
Göran Gustafssons Stiftelser
MIZŠ
Deutsche Forschungsgemeinschaft
Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
U.S. Department of Energy
European Cooperation in Science and Technology
EU-ESF
RGC
Fundação de Amparo à Pesquisa do Estado de São Paulo
Institutul de Fizică Atomică
Natural Sciences and Engineering Research Council of Canada
Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science
GenT Programmes Generalitat Valenciana, Spain
Irish Rugby Football Union
Cantons of Bern and Geneva
Chinese Academy of Sciences
Defence Science Institute
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Compute Canada
MNE
Agencia Nacional de Promoción Científica y Tecnológica
Minerva Foundation
European Research Council
National Research Foundation
Royal Society of South Australia
European Regional Development Fund
CERN
Ministerstvo Školství, Mládeže a Tělovýchovy
National Research Council Canada
Alexander von Humboldt-Stiftung
Multiple Sclerosis Scientific Research Foundation
Horizon 2020
British Columbia Knowledge Development Fund
Ministry of Education, Culture, Sports, Science and Technology
National Natural Science Foundation of China
Science and Technology Facilities Council	ST/T002816/1
Cooperative Research Centres, Australian Government Department of Industry	21/SCI/017
UNCE	SCI/013
DNSRC	IN2P3-CNRS
Norwegian Financial Mechanism	2014-2021

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10.1103/PhysRevLett.131.151902

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@article{a62f550f1ac140448d61e8099de4f6c6,

title = "Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector",

abstract = "A search is made for potential cc{\=c} {\=c} tetraquarks decaying into a pair of charmonium states in the four ffiffi muon final state using proton-proton collision data at ps ¼ 13 TeV, corresponding to an integrated luminosity of 140 fb−1 recorded by the ATLAS experiment at LHC. Two decay channels, J=ψ {\th} J=ψ → 4μ and J=ψ {\th} ψ {\dh}2S{\TH} → 4μ, are studied. Backgrounds are estimated based on a hybrid approach involving Monte Carlo simulations and data-driven methods. Statistically significant excesses with respect to backgrounds dominated by the single parton scattering are seen in the di-J=ψ channel consistent with a narrow resonance at 6.9 GeV and a broader structure at lower mass. A statistically significant excess is also seen in the J=ψ {\th} ψ {\dh}2S{\TH} channel. The fitted masses and decay widths of the structures are reported.",

author = "\{ATLAS Collaboration\} and G. Aad and B. Abbott and Abbott, \{D. C.\} and \{Abed Abud\}, A. and K. Abeling and Abhayasinghe, \{D. K.\} and Abidi, \{S. H.\} and AbouZeid, \{O. S.\} and Abraham, \{N. L.\} and H. Abramowicz and H. Abreu and R. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and B. Achkar and L. Adam and \{Adam Bourdarios\}, C. and L. Adamczyk and L. Adamek and J. Adelman and M. Adersberger and A. Adiguzel and S. Adorni and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agapopoulou and Agaras, \{M. N.\} and A. Aggarwal and C. Agheorghiesei and \{Alconada Verzini\}, \{M. J.\} and L. Barak and U. Barron and G. Bella and Y. Benhammou and Biswal, \{J. P.\} and T. Cao and B. Chen and H. Cohen and E. Etzion and G. Koren and O. Kuprash and Lutz, \{M. S.\} and \{Pascual Dominguez\}, L. and M. Pitt and D. Reikher and \{Salvador Salas\}, A. and A. Soffer and Tamir, \{N. M.\} and D. Vannicola",

note = "Publisher Copyright: {\textcopyright} 2023 CERN, for the ATLAS Collaboration.",

year = "2023",

month = oct,

day = "13",

doi = "10.1103/PhysRevLett.131.151902",

language = "אנגלית",

volume = "131",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

}

TY - JOUR

T1 - Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abbott, D. C.

AU - Abed Abud, A.

AU - Abeling, K.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - AbouZeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Achkar, B.

AU - Adam, L.

AU - Adam Bourdarios, C.

AU - Adamczyk, L.

AU - Adamek, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adorni, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agapopoulou, C.

AU - Agaras, M. N.

AU - Aggarwal, A.

AU - Agheorghiesei, C.

AU - Alconada Verzini, M. J.

AU - Barak, L.

AU - Barron, U.

AU - Bella, G.

AU - Benhammou, Y.

AU - Biswal, J. P.

AU - Cao, T.

AU - Chen, B.

AU - Cohen, H.

AU - Etzion, E.

AU - Koren, G.

AU - Kuprash, O.

AU - Lutz, M. S.

AU - Pascual Dominguez, L.

AU - Pitt, M.

AU - Reikher, D.

AU - Salvador Salas, A.

AU - Soffer, A.

AU - Tamir, N. M.

AU - Vannicola, D.

PY - 2023/10/13

Y1 - 2023/10/13

N2 - A search is made for potential ccc̄ c̄ tetraquarks decaying into a pair of charmonium states in the four ffiffi muon final state using proton-proton collision data at ps ¼ 13 TeV, corresponding to an integrated luminosity of 140 fb−1 recorded by the ATLAS experiment at LHC. Two decay channels, J=ψ þ J=ψ → 4μ and J=ψ þ ψ ð2SÞ → 4μ, are studied. Backgrounds are estimated based on a hybrid approach involving Monte Carlo simulations and data-driven methods. Statistically significant excesses with respect to backgrounds dominated by the single parton scattering are seen in the di-J=ψ channel consistent with a narrow resonance at 6.9 GeV and a broader structure at lower mass. A statistically significant excess is also seen in the J=ψ þ ψ ð2SÞ channel. The fitted masses and decay widths of the structures are reported.

AB - A search is made for potential ccc̄ c̄ tetraquarks decaying into a pair of charmonium states in the four ffiffi muon final state using proton-proton collision data at ps ¼ 13 TeV, corresponding to an integrated luminosity of 140 fb−1 recorded by the ATLAS experiment at LHC. Two decay channels, J=ψ þ J=ψ → 4μ and J=ψ þ ψ ð2SÞ → 4μ, are studied. Backgrounds are estimated based on a hybrid approach involving Monte Carlo simulations and data-driven methods. Statistically significant excesses with respect to backgrounds dominated by the single parton scattering are seen in the di-J=ψ channel consistent with a narrow resonance at 6.9 GeV and a broader structure at lower mass. A statistically significant excess is also seen in the J=ψ þ ψ ð2SÞ channel. The fitted masses and decay widths of the structures are reported.

UR - https://www.scopus.com/pages/publications/85175279527

U2 - 10.1103/PhysRevLett.131.151902

DO - 10.1103/PhysRevLett.131.151902

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

C2 - 37897770

AN - SCOPUS:85175279527

SN - 0031-9007

VL - 131

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 151902

ER -

Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector

Abstract

Funding

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