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

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector. / ATLAS Collaboration.
In: Physical review letters, Vol. 131, No. 15, 151902, 13.10.2023.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

ATLAS Collaboration 2023, 'Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector', Physical review letters, vol. 131, no. 15, 151902. https://doi.org/10.1103/PhysRevLett.131.151902

APA

ATLAS Collaboration (2023). Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector. Physical review letters, 131(15), Article 151902. https://doi.org/10.1103/PhysRevLett.131.151902

Vancouver

ATLAS Collaboration. Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector. Physical review letters. 2023 Oct 13;131(15):151902. doi: 10.1103/PhysRevLett.131.151902

Author

ATLAS Collaboration. / Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector. In: Physical review letters. 2023 ; Vol. 131, No. 15.

Bibtex

@article{a6521c56633a4536bb9ab8b626474dd9,
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 ccc[over ¯]c[over ¯] tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at sqrt[s]=13  TeV, corresponding to an integrated luminosity of 140  fb^{-1} recorded by the ATLAS experiment at LHC. Two decay channels, J/ψ+J/ψ→4μ and J/ψ+ψ(2S)→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+ψ(2S) channel. The fitted masses and decay widths of the structures are reported.",
author = "{ATLAS Collaboration} and Hanadi Ali and A.E. Barton and I.A. Bertram and G. Borissov and E.V. Bouhova-Thacker and R.A.M. Ferguson and James Ferrando and H. Fox and R.C.W. Henderson and R.W.L. Jones and V. Kartvelishvili and P.A. Love and E.J. Marshall and L. Meng and D. Muenstermann and N. Ribaric and K. Rybacki and M. Smizanska and S. Spinali and A.M. Wharton",
year = "2023",
month = oct,
day = "13",
doi = "10.1103/PhysRevLett.131.151902",
language = "English",
volume = "131",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "15",

}

RIS

TY - JOUR

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

AU - ATLAS Collaboration

AU - Ali, Hanadi

AU - Barton, A.E.

AU - Bertram, I.A.

AU - Borissov, G.

AU - Bouhova-Thacker, E.V.

AU - Ferguson, R.A.M.

AU - Ferrando, James

AU - Fox, H.

AU - Henderson, R.C.W.

AU - Jones, R.W.L.

AU - Kartvelishvili, V.

AU - Love, P.A.

AU - Marshall, E.J.

AU - Meng, L.

AU - Muenstermann, D.

AU - Ribaric, N.

AU - Rybacki, K.

AU - Smizanska, M.

AU - Spinali, S.

AU - Wharton, A.M.

PY - 2023/10/13

Y1 - 2023/10/13

N2 - A search is made for potential ccc[over ¯]c[over ¯] tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at sqrt[s]=13  TeV, corresponding to an integrated luminosity of 140  fb^{-1} recorded by the ATLAS experiment at LHC. Two decay channels, J/ψ+J/ψ→4μ and J/ψ+ψ(2S)→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+ψ(2S) channel. The fitted masses and decay widths of the structures are reported.

AB - A search is made for potential ccc[over ¯]c[over ¯] tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at sqrt[s]=13  TeV, corresponding to an integrated luminosity of 140  fb^{-1} recorded by the ATLAS experiment at LHC. Two decay channels, J/ψ+J/ψ→4μ and J/ψ+ψ(2S)→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+ψ(2S) channel. The fitted masses and decay widths of the structures are reported.

U2 - 10.1103/PhysRevLett.131.151902

DO - 10.1103/PhysRevLett.131.151902

M3 - Journal article

VL - 131

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 15

M1 - 151902

ER -