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$$P_c$$ pentaquarks as a hadronic molecule coupling to five-quark states

Yamaguchi, Yasuhiro; Hosaka, Atsushi; Takeuchi, Sachiko*; Takizawa, Makoto*

We study the $$P_c$$ pentaquarks that were reported by LHCb collaboration in 2019. We employ the hadronic molecular model where the one pion exchange potential is introduced as the long-range hadron interaction. As for the short-range interaction, we introduce coupling to the five-quark states in the hadronic molecule. By solving the Schrodinger equation by using the variational method and the complex scaling method, we obtain the energies and decay widths. We also discuss the role of the tensor force and the short-range interaction.

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