Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark–antiquark pair, respectively1,2. 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 u¯ and a d¯ quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of D0D0π+ mesons just below the D*+D0 mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.

Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen Gallego, F., Ackernley, T., Adeva, B., et al. (2022). Observation of an exotic narrow doubly charmed tetraquark. NATURE PHYSICS, 18(7), 751-754 [10.1038/s41567-022-01614-y].

Observation of an exotic narrow doubly charmed tetraquark

Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Martinazzoli L.;Martinelli M.;Minotti A.;Petruzzo M.;Pizzichemi M.;Shields E. B.;
2022

Abstract

Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark–antiquark pair, respectively1,2. 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 u¯ and a d¯ quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of D0D0π+ mesons just below the D*+D0 mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.
Articolo in rivista - Articolo scientifico
LHCb
English
2022
751
754
4
Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen Gallego, F., Ackernley, T., Adeva, B., et al. (2022). Observation of an exotic narrow doubly charmed tetraquark. NATURE PHYSICS, 18(7), 751-754 [10.1038/s41567-022-01614-y].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/399973
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