{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.114869.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1915457"}},{"@id":"https://doi.org/10.1038/s41567-022-01614-y","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"LHCb Collaboration"},"creator":{"@type":"Organization","name":"LHCb Collaboration"},"datePublished":"2021","description":"Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. The observation of a new type of hadronic state, a doubly charmed tetraquark containing two charm quarks, an anti-$u$ and an anti-$d$ quark, is reported using data collected by the LHCb experiment at the Large Hadron Collider. This exotic state with a mass of about 3875 MeV$/c^2$ manifests itself as a narrow peak in the mass spectrum of $D^0D^0\\pi^+$ mesons just below the $D^{*+}D^0$ mass threshold. The near threshold mass together with a strikingly narrow width reveals the resonance nature of the state.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.114869.v1/t1","@type":"Dataset","description":"Distribution of $D^0 D^0 \\pi^+$ mass where the contribution of the non-$D^0$ background has been statistically subtracted. Uncertainties on the...","name":"Fig 1"},{"@id":"https://doi.org/10.17182/hepdata.114869.v1/t2","@type":"Dataset","description":"Distribution of $D^0 D^0 \\pi^+$ mass where the contribution of the non-$D^0$ background has been statistically subtracted by assigning the...","name":"Fig 1 unbinned"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1915457?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/114869"}],"inLanguage":"en","name":"Observation of an exotic narrow doubly charmed tetraquark","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1915457?version=1","version":1}