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Spectra and strong decays of open charm-bottom cb̅qq̅ tetraquarks in an unequal-mass Born-Oppenheimer framework

  • Bowen Kang
  • Xi Xia
  • Tao Guo
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Abstract

We investigate the mass spectra and strong decay channels of S-wave open charm-bottom cb̅qq̅ (q = u,d,s) tetraquarks within the Born-Oppenheimer approximation. Extending our previous study of hidden heavy flavor tetraquarks, we account for the unequal-mass heavy quark sources and construct the effective potential based on independently optimized heavy-light orbitals. This makes the computational method more generally applicable. For the quantum numbers JP=0+, 1+, and 2+, we have obtained the spectra of the open charm-bottom cb̅qq̅ tetraquarks corresponding to color-singlet states constructed by coupling two color octets. The predicted masses exhibit systematic flavor-dependent shifts and characteristic hyperfine splittings. We also estimate partial widths for selected two-body open flavor decay channels using color-spin recoupling and a phenomenological decay prescription. The resulting channel-dependent decay modes, together with comparisons to other theoretical predictions, provide useful benchmarks for future theoretical investigations and experimental searches for open charm-bottom tetraquarks.

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Cite

BibTeXRIS
BibTeX
@misc{kang2026spectra,
  title = {{Spectra and strong decays of open charm-bottom $c\barbq\barq$ tetraquarks in an unequal-mass Born-Oppenheimer framework}},
  author = {Bowen Kang and Xi Xia and Tao Guo},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.38217},
  eprint = {2610.38217},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.38217},
  note = {CC0},
}
RIS
TY  - UNPB
TI  - Spectra and strong decays of open charm-bottom cb̅qq̅ tetraquarks in an unequal-mass Born-Oppenheimer framework
AU  - Bowen Kang
AU  - Xi Xia
AU  - Tao Guo
PY  - 2026
DA  - 2026/10/28
PB  - arXiv
DO  - 10.48550/arxiv.2610.38217
UR  - https://arxiv.org/abs/2610.38217
AB  - We investigate the mass spectra and strong decay channels of S-wave open charm-bottom cb̅qq̅ (q = u,d,s) tetraquarks within the Born-Oppenheimer approximation. Extending our previous study of hidden heavy flavor tetraquarks, we account for the unequal-mass heavy quark sources and construct the effective potential based on independently optimized heavy-light orbitals. This makes the computational method more generally applicable. For the quantum numbers J^P=0^+, 1^+, and 2^+, we have obtained the spectra of the open charm-bottom cb̅qq̅ tetraquarks corresponding to color-singlet states constructed by coupling two color octets. The predicted masses exhibit systematic flavor-dependent shifts and characteristic hyperfine splittings. We also estimate partial widths for selected two-body open flavor decay channels using color-spin recoupling and a phenomenological decay prescription. The resulting channel-dependent decay modes, together with comparisons to other theoretical predictions, provide useful benchmarks for future theoretical investigations and experimental searches for open charm-bottom tetraquarks.
ER  -