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.

Observation of an exotic narrow doubly charmed tetraquark / Aaij, R., Abdelmotteleb, A.S.W., Abellán Beteta, C., Abudinen Gallego, F.J., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., et al.. - In: NATURE PHYSICS. - ISSN 1745-2481. - 18:7(2022), pp. 751-754. [10.1038/s41567-022-01614-y]

Observation of an exotic narrow doubly charmed tetraquark

Casse, G.;Sarti, A.;
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.
2022
Tetra Quark, narrow resonances
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of an exotic narrow doubly charmed tetraquark / Aaij, R., Abdelmotteleb, A.S.W., Abellán Beteta, C., Abudinen Gallego, F.J., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., et al.. - In: NATURE PHYSICS. - ISSN 1745-2481. - 18:7(2022), pp. 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/11573/1673235
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