@Article{LHCbCollaborationAaij_etal2022,
author="LHCb Collaboration (Aaij, R. et al
and Jashal, B. K.
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Vidal, J.",
title="Observation of an exotic narrow doubly charmed tetraquark",
journal="Nature Physics",
year="2022",
publisher="Nature Portfolio",
volume="18",
pages="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 (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.",
optnote="WOS:000811954400004",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5279), last updated on Mon, 19 Dec 2022 07:59:58 +0000",
issn="1745-2473",
doi="10.1038/s41567-022-01614-y",
opturl="https://arxiv.org/abs/2109.01038",
opturl="https://doi.org/10.1038/s41567-022-01614-y",
language="English"
}