@article{c99ab7f97fce4a3bb21a41aa19b5826e,
title = "Observation of a Narrow Pentaquark State, Pc (4312)+, and of the Two-Peak Structure of the Pc (4450)+",
abstract = "A narrow pentaquark state, Pc(4312)+, decaying to J/ψp, is discovered with a statistical significance of 7.3σ in a data sample of Λb0→J/ψpK- decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The Pc(4450)+ pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, Pc(4440)+ and Pc(4457)+, where the statistical significance of this two-peak interpretation is 5.4σ. The proximity of the ςc+{\=D}0 and ςc+{\=D}∗0 thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states.",
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year = "2019",
month = jun,
day = "5",
doi = "10.1103/PhysRevLett.122.222001",
language = "English",
volume = "122",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "22",
}
