Vector- and tensor-meson resonance contributions to χ_cJ→ PPV decays

Abstract

Light vector- and tensor-meson resonance contributions to the three-body decays χ_cJ→ P₁P₂V are studied in a quasi-two-body framework combined with SU(3) flavor relations for the two-body subprocesses, covering both the χ_c0,1,2→ VV→ P₁P₂V and χ_c1,2→ TP→ P₁P₂V. Both the narrow-width approximation (NWA) and the finite-width effects (FWE) treatment are considered, the latter being essential for tensor subdecays that are kinematically closed at the nominal mass and contribute only through the high-mass tail of the resonance. The predicted resonance bands span several orders of magnitude, with the largest ones in the ππρ, πKK̅^*, and KK̅ϕ final states, whereas the KK̅ω and η'KK^* channels are dominated by the tensor band and thus provide a clean window onto the T→ PV tensor resonances. The band-by-band strengths and their ordering are intended as priors and channel priorities for future invariant-mass and amplitude analyses, and can be compared with the measured totals of several channels.

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BibTeX RIS

BibTeX

@misc{xu2026vector,
  title = {{Vector- and tensor-meson resonance contributions to $χ_cJ\to PPV$ decays}},
  author = {Yuan-Guo Xu and Qin-Ze Song and Bo Lan and Ru-Min Wang},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.38178},
  eprint = {2610.38178},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.38178},
  note = {CC BY-NC-ND 4.0},
}

RIS

TY  - UNPB
TI  - Vector- and tensor-meson resonance contributions to χ_cJ→ PPV decays
AU  - Yuan-Guo Xu
AU  - Qin-Ze Song
AU  - Bo Lan
AU  - Ru-Min Wang
PY  - 2026
DA  - 2026/10/28
PB  - arXiv
DO  - 10.48550/arxiv.2610.38178
UR  - https://arxiv.org/abs/2610.38178
AB  - Light vector- and tensor-meson resonance contributions to the three-body decays χ_cJ→ P_1P_2V are studied in a quasi-two-body framework combined with SU(3) flavor relations for the two-body subprocesses, covering both the χ_c0,1,2→ VV→ P_1P_2V and χ_c1,2→ TP→ P_1P_2V. Both the narrow-width approximation (NWA) and the finite-width effects (FWE) treatment are considered, the latter being essential for tensor subdecays that are kinematically closed at the nominal mass and contribute only through the high-mass tail of the resonance. The predicted resonance bands span several orders of magnitude, with the largest ones in the ππρ, πKK̅^*, and KK̅ϕ final states, whereas the KK̅ω and η'KK^* channels are dominated by the tensor band and thus provide a clean window onto the T→ PV tensor resonances. The band-by-band strengths and their ordering are intended as priors and channel priorities for future invariant-mass and amplitude analyses, and can be compared with the measured totals of several channels.
ER  -

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