{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.89271.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1728691"}},{"@id":"https://doi.org/10.1103/PhysRevLett.122.222001","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"LHCb Collaboration"},"creator":{"@type":"Organization","name":"LHCb Collaboration"},"datePublished":"2019","description":"A narrow pentaquark state, $P_c(4312)^+$, decaying to $J/\\psi p$ is discovered with a statistical significance of $7.3\\sigma$ in a data sample of ${\\Lambda_b^0\\to J/\\psi p K^-}$ decays which is an order of magnitude larger than that previously analyzed by the LHCb collaboration. The $P_c(4450)^+$ pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, $P_c(4440)^+$ and $P_c(4457)^+$, where the statistical significance of this two-peak interpretation is $5.4\\sigma$. Proximity of the $\\Sigma_c^+\\bar{D}^{0}$ and $\\Sigma_c^+\\bar{D}^{*0}$ thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.89271.v1/t1","@type":"Dataset","description":"Distribution of $(J/\\psi p)$ system invariant mass from the decay of $\\Lambda_{b}^{0}$ candidates in the channel $\\Lambda_{b}^{0} \\to J/\\psi p...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.89271.v1/t2","@type":"Dataset","description":"Distribution of $(J/\\psi p)$ system invariant mass from the decay of $\\Lambda_{b}^{0}$ candidates in the channel $\\Lambda_{b}^{0} \\to J/\\psi p...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.89271.v1/t3","@type":"Dataset","description":"$\\cos \\theta_{P_c}$-weighted ditribution of $(J/\\psi p)$ system invariant mass from the decay of $\\Lambda_{b}^{0}$ candidates in the channel $\\Lambda_{b}^{0} \\to...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.89271.v1/t4","@type":"Dataset","description":"Spline interpolation of the weight function (depending of $\\cos \\theta_{P_c}$) applied to $\\Lambda_{b}^{0}$ candidates. The weight function is determined as...","name":"Table 4"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1728691?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/89271"}],"inLanguage":"en","name":"Observation of a narrow pentaquark state, $P_c(4312)^+$, and of two-peak structure of the $P_c(4450)^+$","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1728691?version=1","version":1}