Observation of an exotic narrow doubly charmed tetraquark



Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Gallego, FJ Abudinen, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, CA
et al (show 995 more authors) (2022) Observation of an exotic narrow doubly charmed tetraquark NATURE PHYSICS, 18 (7). 751-+. ISSN 1745-2473, 1745-2481

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Abstract

Abstract Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark–antiquark pair, respectively 1,2 . Here, we report the observation of a hadronic state containing four quarks in the Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, a $$\overline{{{{{u}}}}}$$ u ¯ and a $$\overline{{{{{d}}}}}$$ d ¯ quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of D 0 D 0 π + mesons just below the D *+ D 0 mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 31 Aug 2022 10:21
Last Modified: 21 Nov 2025 17:10
DOI: 10.1038/s41567-022-01614-y
Open Access URL: https://www.nature.com/articles/s41567-022-01614-y...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3162847
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