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PreprintCC BY 4.0arXiv

Next-to-leading order QCD corrections to fully charm tetraquark radiative decays

  • Xiang Li
  • Yan-Qing Ma
  • Bo-Xuan Shi
  • Sheng-Qi Zhang
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Abstract

We present the first complete next-to-leading-order (NLO) QCD calculation of the fully charm tetraquark radiative decays T4c(0++,2++)→γJ/ψ and T4c(1+−)→γηc at leading order in the relative velocity. The NLO widths are $2.3−−3.1$ times the leading-order (LO) widths for the long-distance matrix element (LDME) inputs considered here, with mc=1.5 GeV and μR=2mc. In the scalar channel, the NLO corrections change the relative contributions of the two color-spin components and their interference. For the tensor channel, the longitudinal fraction fL of the daughter J/ψ changes from $0.11$ at LO to $0.18$ at strictly expanded NLO, with sensitivity to higher-order corrections. These NLO results provide valuable theoretical input for searches for states predicted below their respective lowest dicharmonium thresholds and for probing the spin and short-distance structure of observed tetraquark candidates.

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Cite

BibTeXRIS
BibTeX
@misc{li2026nexttoleading,
  title = {{Next-to-leading order QCD corrections to fully charm tetraquark radiative decays}},
  author = {Xiang Li and Yan-Qing Ma and Bo-Xuan Shi and Sheng-Qi Zhang},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.04910},
  eprint = {2611.04910},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.04910},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Next-to-leading order QCD corrections to fully charm tetraquark radiative decays
AU  - Xiang Li
AU  - Yan-Qing Ma
AU  - Bo-Xuan Shi
AU  - Sheng-Qi Zhang
PY  - 2026
DA  - 2026/11/03
PB  - arXiv
DO  - 10.48550/arxiv.2611.04910
UR  - https://arxiv.org/abs/2611.04910
AB  - We present the first complete next-to-leading-order (NLO) QCD calculation of the fully charm tetraquark radiative decays T_4c(0^++,2^++)→γJ/ψ and T_4c(1^+−)→γη_c at leading order in the relative velocity. The NLO widths are $2.3−−3.1$ times the leading-order (LO) widths for the long-distance matrix element (LDME) inputs considered here, with m_c=1.5 GeV and μ_R=2m_c. In the scalar channel, the NLO corrections change the relative contributions of the two color-spin components and their interference. For the tensor channel, the longitudinal fraction f_L of the daughter J/ψ changes from $0.11$ at LO to $0.18$ at strictly expanded NLO, with sensitivity to higher-order corrections. These NLO results provide valuable theoretical input for searches for states predicted below their respective lowest dicharmonium thresholds and for probing the spin and short-distance structure of observed tetraquark candidates.
ER  -