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Observation of an excess of dicharmonium events in the four-muon final state with the ATLAS detector

A search is made for potential 𝑐⁢𝑐⁢¯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,correspondingto n integrated luminosity of 140 fb−1 recorded by the ATLAS experiment at LHC. Two decay channels, 𝐽/𝜓+𝐽/𝜓→4⁢𝜇 an...

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Hauptverfasser: Aad, Georges (VerfasserIn) , Baltes, Lisa Marie (VerfasserIn) , Bartels, Falk (VerfasserIn) , Czurylo, Marta (VerfasserIn) , Rio, Fernando del (VerfasserIn) , Dittmeier, Sebastian (VerfasserIn) , Dunford, Monica (VerfasserIn) , Franchino, Silvia (VerfasserIn) , Klassen, Martin (VerfasserIn) , Mkrtchyan, Tigran (VerfasserIn) , Ott, Philipp (VerfasserIn) , Rassloff, Damir Fabrice (VerfasserIn) , Rodriguez Bosca, Sergi (VerfasserIn) , Sauer, Christof (VerfasserIn) , Schöning, André (VerfasserIn) , Schultz-Coulon, Hans-Christian (VerfasserIn) , Sothilingam, Varsiha (VerfasserIn) , Stamen, Rainer (VerfasserIn) , Starovoitov, Pavel (VerfasserIn) , Vigani, Luigi (VerfasserIn) , Weber, Sebastian (VerfasserIn) , Wessels, Martin (VerfasserIn) , Zinßer, Joachim (VerfasserIn)
Körperschaft: ATLAS Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 13 October 2023
In: Physical review letters
Year: 2023, Jahrgang: 131, Heft: 15, Pages: 1-22
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.151902
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.131.151902
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.131.151902
Volltext
Verfasserangaben:G. Aad et al. (ATLAS Collaboration)
Beschreibung
Zusammenfassung:A search is made for potential 𝑐⁢𝑐⁢¯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,correspondingto n integrated luminosity of 140 fb−1 recorded by the ATLAS experiment at LHC. Two decay channels, 𝐽/𝜓+𝐽/𝜓→4⁢𝜇 and 𝐽/𝜓+𝜓⁡(2⁢𝑆)→4⁢𝜇, 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⁡(2⁢S) channel. The fitted masses and decay widths of the structures are reported.
Beschreibung:ATLAS Corporation: G. Aad, L.M. Baltes, F. Bartels, M.M. Czurylo, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und viele weitere]
Gesehen am 27.02.2025
Beschreibung:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.151902

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