Hidden charm pentaquark states and $\Sigma_c^{(*)}\bar{D}^{(*)}$ interaction in chiral perturbation theory

Bo Wang; Guang-Juan Wang; Lu Meng; Shi-Lin Zhu

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Hidden charm pentaquark states and Sigma_c^(())bar{D}^(()) interaction in chiral perturbation theory

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arxiv 1911.09250 v1 pith:OHVHSERQ submitted 2019-11-21 hep-ph

Hidden charm pentaquark states and $\Sigma_c^{()}\bar{D}^{()}$ interaction in chiral perturbation theory

Lu Meng , Bo Wang , Guang-Juan Wang , Shi-Lin Zhu This is my paper

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keywords stateschiraldiagramsinteractionloopperturbationsigmatheory

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abstract

We adopt the chiral perturbation theory to calculate the $\Sigma_{c}^{(*)}\bar{D}^{(*)}$ interaction to the next-to-leading order (NLO) and include the couple-channel effect in the loop diagrams. We reproduce the three $P_c$ states in the molecular picture after including the $\Lambda_{c}\bar{D}^{(*)}$ intermediate states. We also discuss some novel observations arising from the loop diagrams.

Hidden charm pentaquark states and $\Sigma_c^{(*)}\bar{D}^{(*)}$ interaction in chiral perturbation theory

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Hidden charm pentaquark states and $\Sigma_c^{()}\bar{D}^{()}$ interaction in chiral perturbation theory