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arXiv · 1507.03717

Towards exotic hidden-charm pentaquarks in QCD

Hua-Xing Chen·Wei Chen·Xiang Liu·T. G. Steele·Shi-Lin Zhu
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Abstract

Inspired by $P_c(4380)$ and $P_c(4450)$ recently observed by LHCb, a QCD sum rule investigation is performed, by which they can be identified as exotic hidden-charm pentaquarks composed of an anti-charmed meson and a charmed baryon. Our results suggest that $P_c(4380)$ and $P_c(4450)$ have quantum numbers $J^P=3/2^-$ and $5/2^+$, respectively. Furthermore, two extra hidden-charm pentaqurks with configurations $\bar{D}\Sigma_c^*$ and $\bar{D}^*\Sigma_c^*$ are predicted, which have spin-parity quantum numbers $J^P=3/2^-$ and $J^P=5/2^+$, respectively. As an important extension, the mass predictions of hidden-bottom pentaquarks are also given. Searches for these partners of $P_c(4380)$ and $P_c(4450)$ are especially accessible at future experiments like LHCb and BelleII.

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Hua-Xing Chen, Wei Chen, Xiang Liu, T. G. Steele, Shi-Lin Zhu. 2015-07-14. Towards exotic hidden-charm pentaquarks in QCD. https://doi.org/10.1103/physrevlett.115.172001

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