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

ATLAS Publications; J.F. Allen; T.M. Carter; D. Duda; J.M. Gargan; R.Y. Gonzalez Andana; A. Hasib; V.A. Parrish; E.A. Pender; T. Qiu; E.P. Takeva; N. Themistokleous; E.M. Villhauer; Z. Xu; E. Zaid

doi:10.1103/PhysRevLett.131.151902

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

ATLAS Publications, J.F. Allen, T.M. Carter, D. Duda, J.M. Gargan, R.Y. Gonzalez Andana, A. Hasib, V.A. Parrish, E.A. Pender, T. Qiu, E.P. Takeva, N. Themistokleous, E.M. Villhauer, Z. Xu, E. Zaid

School of Physics and Astronomy

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

Abstract / Description of output

A search is made for potential cc¯c¯c tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at √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.

Original language	English
Article number	151902
Pages (from-to)	1-22
Number of pages	22
Journal	Physical Review Letters
Volume	131
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.131.151902
Publication status	Published - 13 Oct 2023

Keywords / Materials (for Non-textual outputs)

Double-Parton Scatterings
J/PSI-Pair Production

Access to Document

10.1103/PhysRevLett.131.151902Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2304.08962

3 Finished
3 Active

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P.
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/10/22 → 30/09/25
Project: Research

Cite this

ATLAS Publications, Allen, J. F., Carter, T. M., Duda, D., Gargan, J. M., Gonzalez Andana, R. Y., Hasib, A., Parrish, V. A., Pender, E. A., Qiu, T., Takeva, E. P., Themistokleous, N., Villhauer, E. M., Xu, Z., & Zaid, E. (2023). Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector. Physical Review Letters, 131(15), 1-22. Article 151902. https://doi.org/10.1103/PhysRevLett.131.151902

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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 muon final state using proton-proton collision data at √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.",

keywords = "Double-Parton Scatterings, J/PSI-Pair Production",

author = "{ATLAS Publications} and Clark, {Philip James} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, {Victoria Jane} and Liza Mijovic and Benjamin Wynne and Sara Alderweireldt and J.F. Allen and T.M. Carter and D. Duda and J.M. Gargan and {Gonzalez Andana}, R.Y. and A. Hasib and V.A. Parrish and E.A. Pender and T. Qiu and E.P. Takeva and N. Themistokleous and E.M. Villhauer and Z. Xu and E. Zaid",

year = "2023",

month = oct,

day = "13",

doi = "10.1103/PhysRevLett.131.151902",

language = "English",

volume = "131",

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issn = "0031-9007",

publisher = "American Physical Society",

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ATLAS Publications, Allen, JF, Carter, TM, Duda, D, Gargan, JM, Gonzalez Andana, RY, Hasib, A, Parrish, VA, Pender, EA, Qiu, T, Takeva, EP, Themistokleous, N, Villhauer, EM, Xu, Z & Zaid, E 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, pp. 1-22. https://doi.org/10.1103/PhysRevLett.131.151902

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AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Alderweireldt, Sara

AU - Allen, J.F.

AU - Carter, T.M.

AU - Duda, D.

AU - Gargan, J.M.

AU - Gonzalez Andana, R.Y.

AU - Hasib, A.

AU - Parrish, V.A.

AU - Pender, E.A.

AU - Qiu, T.

AU - Takeva, E.P.

AU - Themistokleous, N.

AU - Villhauer, E.M.

AU - Xu, Z.

AU - Zaid, E.

PY - 2023/10/13

Y1 - 2023/10/13

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AB - A search is made for potential cc¯c¯c tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at √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.

KW - Double-Parton Scatterings

KW - J/PSI-Pair Production

U2 - 10.1103/PhysRevLett.131.151902

DO - 10.1103/PhysRevLett.131.151902

M3 - Article

SN - 0031-9007

VL - 131

SP - 1

EP - 22

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 / Description of output

Keywords / Materials (for Non-textual outputs)

Access to Document

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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this