Strong LHCb evidence supporting the existence of the hidden-charm molecular pentaquarks

On 26 March 2019, at the Rencontres de Moriond QCD conference, the LHCb Collaboration reported the observation of three new pentaquarks, namely Pc(4312), Pc(4440), and Pc(4457), which are consistent with the loosely bound molecular hidden-charm pentaquark states composed of an S-wave charmed baryon...

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Detalles Bibliográficos
Autores principales: Chen, Rui, Sun, Zhi-Feng, Liu, Xiang, Zhu, Shi-Lin
Lenguaje:eng
Publicado: 2019
Materias:
nucl-th
Nuclear Physics - Theory
hep-lat
Particle Physics - Lattice
hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.100.011502
http://cds.cern.ch/record/2759241
Descripción
Sumario:On 26 March 2019, at the Rencontres de Moriond QCD conference, the LHCb Collaboration reported the observation of three new pentaquarks, namely Pc(4312), Pc(4440), and Pc(4457), which are consistent with the loosely bound molecular hidden-charm pentaquark states composed of an S-wave charmed baryon Σc and an S-wave anticharmed meson (D¯, D¯*). In this work, we present a direct calculation by the one-boson-exchange model and demonstrate explicitly that the Pc(4312), Pc(4440), and Pc(4457) do correspond to the loosely bound ΣcD¯ with (I=1/2, JP=1/2-), ΣcD¯* with (I=1/2, JP=1/2-), and ΣcD¯* with (I=1/2, JP=3/2-), respectively.

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