%0 Journal Article
%T Observation of an exotic narrow doubly charmed tetraquark
%A LHCb Collaboration (Aaij, R. et al
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%J Nature Physics
%D 2022
%V 18
%I Nature Portfolio
%@ 1745-2473
%G English
%F LHCbCollaborationAaij_etal2022
%O WOS:000811954400004
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5279), last updated on Mon, 19 Dec 2022 07:59:58 +0000
%X 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 (u) over bar and a (d) over tilde quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of (DD0)-D-0 pi(+) 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.
%R 10.1038/s41567-022-01614-y
%U https://arxiv.org/abs/2109.01038
%U https://doi.org/10.1038/s41567-022-01614-y
%P 751-754