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arXiv · 2511.15649

Towards the LHCb pentaquark modes in the single-charm sector

Chao-Wei Shen·Yong-Hui Lin·Hao-Jie Jing
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Abstract

The mass spectrum of $\Lambda_c$ baryon family is investigated within the $DN$-$D^*N$ coupled-channel framework using two phenomenological approaches for the low-energy $D^{(*)} N$ interactions: the heavy quark effective theory and the flavor-symmetry-constrained effective Lagrangian method. It is shown that the LHCb pentaquark states have direct analogs in the $\Lambda_c$ family. Specifically, $\Lambda_c(2765)$, $\Lambda_c(2910)$, and $\Lambda_c(2940)$ mirror the patterns of $P_{c\bar{c}}(4312)$, $P_{c\bar{c}}(4440)$, and $P_{c\bar{c}}(4457)$, respectively. These mirror pentaquark modes offer valuable insights into the quantum numbers of the two heavy $P_{c\bar{c}}$ states, which remain experimentally undetermined. Further exploration of such correlations among exotic hadronic states across different flavor sectors will be crucial for developing a comprehensive theoretical understanding of the modern hadron spectrum.

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Chao-Wei Shen, Yong-Hui Lin, Hao-Jie Jing. 2025-11-19. Towards the LHCb pentaquark modes in the single-charm sector. https://arxiv.org/abs/2511.15649

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