In:
Nature Physics, Springer Science and Business Media LLC, Vol. 18, No. 7 ( 2022-07), p. 751-754
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.
Type of Medium:
Online Resource
ISSN:
1745-2473
,
1745-2481
DOI:
10.1038/s41567-022-01614-y
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2022
detail.hit.zdb_id:
2210466-5
detail.hit.zdb_id:
2206346-8
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