{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.113470.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1915358"}},{"@id":"https://doi.org/10.1038/s41467-022-30206-w","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"LHCb Collaboration"},"creator":{"@type":"Organization","name":"LHCb Collaboration"},"datePublished":"2021","description":"An exotic narrow state in the $D^0D^0\\pi^+$ mass spectrum just below the $D^{*+}D^0$ mass threshold is studied using a data set corresponding to an integrated luminosity of 9 fb$^{-1}$ acquired with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The state is consistent with the ground isoscalar $T^+_{cc}$ tetraquark with a quark content of $cc\\bar{u}\\bar{d}$ and spin-parity quantum numbers $\\mathrm{J}^{\\mathrm{P}}=1^+$. Study of the $DD$ mass spectra disfavours interpretation of the resonance as the isovector state. The decay structure via intermediate off-shell $D^{*+}$ mesons is confirmed by the $D^0\\pi^+$ mass distribution. The mass of the resonance and its coupling to the $D^{*}D$ system are analysed. Resonance parameters including the pole position, scattering length, effective range and compositeness are measured to reveal important information about the nature of the $T^+_{cc}$ state. In addition, an unexpected dependence of the production rate on track multiplicity is observed.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.113470.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.113470.v1/t2","@type":"Dataset","description":"Mass distribution for $D^0 \\pi^+$ pairs from selected $D^0 D^0 \\pi^+$ candidates with a mass below the $D^{*+}D^0$ mass threshold...","name":"Fig 3"},{"@id":"https://doi.org/10.17182/hepdata.113470.v1/t3","@type":"Dataset","description":"$D^0 D^0$~mass distributions for selected candidates with the $D^0$ background subtracted. Uncertainties on the data points are statistical only and...","name":"Fig 4a"},{"@id":"https://doi.org/10.17182/hepdata.113470.v1/t4","@type":"Dataset","description":"$D^+ D^0$~mass distributions for selected candidates with the $D^0$ background subtracted. Uncertainties on the data points are statistical only and...","name":"Fig 4b"},{"@id":"https://doi.org/10.17182/hepdata.113470.v1/t5","@type":"Dataset","description":"Mass distributions for selected $D^+ D^+$ candidates with the $D^0$ background subtracted. Uncertainties on the data points are statistical only...","name":"Fig 5a"},{"@id":"https://doi.org/10.17182/hepdata.113470.v1/t6","@type":"Dataset","description":"Mass distributions for selected $D^+ D^0 \\pi^+$ candidates with the $D^0$ background subtracted. Uncertainties on the data points are statistical...","name":"Fig 5b"},{"@id":"https://doi.org/10.17182/hepdata.113470.v1/t7","@type":"Dataset","description":"Background-subtracted distributions for the multiplicity of tracks reconstructed in the vertex detector for $T_{cc}^+\\to D^0 D^0 \\pi^+$ signal, low-mass $D^0\\bar{D}^0$...","name":"Fig 7"},{"@id":"https://doi.org/10.17182/hepdata.113470.v1/t8","@type":"Dataset","description":"Background-subtracted transverse momentum spectra for $T_{cc}^+\\to D^0 D^0 \\pi^+$ signal, low-mass $D^0\\bar{D}^0$ and $D^0D^0$ pairs. 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