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arXiv · 1710.10850

Possible open-charmed pentaquark molecule $Ω_c(3188)$ --- the $D Ξ$ bound state --- in the Bethe-Salpeter formalism

Chao Wang·Liang-Liang Liu·Xian-Wei Kang·Xin-Heng Guo·Rui-Wu Wang
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Abstract

We study the $S$-wave $DΞ$ bound state in the Bethe-Salpeter formalism in the ladder and instantaneous approximations. With the kernel generated by the hadronic effective Lagrangian, two open-charmed bound states, which quantum numbers are $I=0$, $J^P=(\frac{1}{2})^-$ and $I=1$, $J^P=(\frac{1}{2})^-$, respectively, are predicted as new candidates of hadronic pentaquark molecules in our formalism. If existing, they could contribute to the broad 3188 eV structure near the five new narrow $Ω_c$ states observed recently by the LHCb Collaboration.

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Chao Wang, Liang-Liang Liu, Xian-Wei Kang, Xin-Heng Guo, Rui-Wu Wang. 2018-05-05. Possible open-charmed pentaquark molecule $Ω_c(3188)$ --- the $D Ξ$ bound state --- in the Bethe-Salpeter formalism. https://doi.org/10.1140/epjc%2Fs10052-018-5874-1

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