Exploring the P-wave bottom-strange molecular pentaquarks with the complex scaling method

Abstract

In this work, we perform a systematic investigation of the P-wave Σ_b K/Λ_b K^*/Σ_b K^* and Σ_bK̅/Λ_bK̅^*/Σ_bK̅^* systems for all possible I(J^P) combinations. In contrast to our earlier study of the negative-parity sector [Eur. Phys. J. C \textbf{85}, 1026 (2025)], the positive-parity sector is dominated by resonances. For the coupled-channel I(J^P)=1/2(1/2⁺) Σ_b K/Λ_b K^*/Σ_b K^* system, we predict a narrow resonance above the Σ_b K threshold. In the I(J^P)=1/2(3/2⁺) Λ_b K^*/Σ_b K^* system, a molecular resonance candidate is found above the Λ_b K^* threshold. For the higher-isospin I=3/2 sector, resonances are identified in the Σ_b K^* subsystem for both J^P=1/2⁺ and 3/2⁺ cases, though both states exhibit relatively compact sizes. We also extend our analysis to the Σ_bK̅/Λ_bK̅^*/Σ_bK̅^* systems, where a cutoff-sensitive resonance is found in the I(J^P)=1/2(1/2⁺) configuration. A broad molecular resonance candidate is found below the Σ_bK̅^* threshold in the I(J^P)=1/2(3/2⁺) system. We hope that these predictions provide useful guidance for future experimental searches for bottom-strange molecular pentaquarks by LHCb.

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Cite

BibTeX RIS

BibTeX

@misc{zheng2026exploring,
  title = {{Exploring the $P$-wave bottom-strange molecular pentaquarks with the complex scaling method}},
  author = {Yuhang Zheng and Qing-Fu Song and Xiaonu Xiong},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.07068},
  eprint = {2609.07068},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.07068},
}

RIS

TY  - UNPB
TI  - Exploring the P-wave bottom-strange molecular pentaquarks with the complex scaling method
AU  - Yuhang Zheng
AU  - Qing-Fu Song
AU  - Xiaonu Xiong
PY  - 2026
DA  - 2026/09/07
PB  - arXiv
DO  - 10.48550/arxiv.2609.07068
UR  - https://arxiv.org/abs/2609.07068
AB  - In this work, we perform a systematic investigation of the P-wave Σ_b K/Λ_b K^*/Σ_b K^* and Σ_bK̅/Λ_bK̅^*/Σ_bK̅^* systems for all possible I(J^P) combinations. In contrast to our earlier study of the negative-parity sector [Eur. Phys. J. C \textbf{85}, 1026 (2025)], the positive-parity sector is dominated by resonances. For the coupled-channel I(J^P)=1/2(1/2^+) Σ_b K/Λ_b K^*/Σ_b K^* system, we predict a narrow resonance above the Σ_b K threshold. In the I(J^P)=1/2(3/2^+) Λ_b K^*/Σ_b K^* system, a molecular resonance candidate is found above the Λ_b K^* threshold. For the higher-isospin I=3/2 sector, resonances are identified in the Σ_b K^* subsystem for both J^P=1/2^+ and 3/2^+ cases, though both states exhibit relatively compact sizes. We also extend our analysis to the Σ_bK̅/Λ_bK̅^*/Σ_bK̅^* systems, where a cutoff-sensitive resonance is found in the I(J^P)=1/2(1/2^+) configuration. A broad molecular resonance candidate is found below the Σ_bK̅^* threshold in the I(J^P)=1/2(3/2^+) system. We hope that these predictions provide useful guidance for future experimental searches for bottom-strange molecular pentaquarks by LHCb.
ER  -

Abstract

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