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PreprintarXiv licencearXiv

Investigation of low-lying Ωb(1P) states in an unquenched coupled-channel framework

  • Zi-Le Zhang
  • Si-Qiang Luo
  • Shuai-Wei Wang
  • Qin Chang
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Abstract

In this work, we study the unquenched effects on the low-lying Ωb(1P) states with a coupled-channel equations. We reveal how the unquenched effects affect the Ωb(1P) spectroscopy and component mixing. The numerical results indicate that the JP=1/2- Ωb(1P) state dominated by the jℓ=0 configuration exhibits significant coupled-channel effects due to its S-wave coupling to the ΞbK̅ channel, where jℓ denotes the total angular momentum of the light flavor degrees-of-freedom. In this scenario, the mass of this state may be shifted close to or below the ΞbK̅ threshold, making the radiative and isospin-breaking channels kinematically allowed decay processes. The present analysis provides a coupled-channel perspective on the low-lying Ωb(1P) spectrum and offers guidance for future experimental studies of excited bottom baryons.

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Cite

BibTeXRIS
BibTeX
@misc{zhang2026investigation,
  title = {{Investigation of low-lying $Ω_b(1P)$ states in an unquenched coupled-channel framework}},
  author = {Zi-Le Zhang and Si-Qiang Luo and Shuai-Wei Wang and Qin Chang},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.20392},
  eprint = {2609.20392},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.20392},
}
RIS
TY  - UNPB
TI  - Investigation of low-lying Ω_b(1P) states in an unquenched coupled-channel framework
AU  - Zi-Le Zhang
AU  - Si-Qiang Luo
AU  - Shuai-Wei Wang
AU  - Qin Chang
PY  - 2026
DA  - 2026/09/17
PB  - arXiv
DO  - 10.48550/arxiv.2609.20392
UR  - https://arxiv.org/abs/2609.20392
AB  - In this work, we study the unquenched effects on the low-lying Ω_b(1P) states with a coupled-channel equations. We reveal how the unquenched effects affect the Ω_b(1P) spectroscopy and component mixing. The numerical results indicate that the J^P=1/2^- Ω_b(1P) state dominated by the j_ℓ=0 configuration exhibits significant coupled-channel effects due to its S-wave coupling to the Ξ_bK̅ channel, where j_ℓ denotes the total angular momentum of the light flavor degrees-of-freedom. In this scenario, the mass of this state may be shifted close to or below the Ξ_bK̅ threshold, making the radiative and isospin-breaking channels kinematically allowed decay processes. The present analysis provides a coupled-channel perspective on the low-lying Ω_b(1P) spectrum and offers guidance for future experimental studies of excited bottom baryons.
ER  -