The H*H*V couplings from light-cone sum rules
Abstract
We present a determination of the strong charge couplings gH*H*V and magnetic couplings fH*H*V (with H ∈ {D, B} and V ∈ {ρ, ω, K*, ϕ}) using the framework of light-cone sum rules (LCSR). The theoretical precision is improved by establishing the leading-power hard-collinear factorization formulas with next-to-leading-order (NLO) αs corrections, alongside the inclusion of power-suppressed contributions up to the next-to-next-to-leading power (NNLP) for both channels. By parameterizing the 𝒪(1/mH*) power corrections, we extract the universal static couplings β= 0.73 ± 0.13 and λ̂ = 0.23 ± 0.06 GeV−1, highlighting their distinct heavy-quark scaling behaviors. While our investigation into SU(3) flavor symmetry breaking shows that these effects are currently overwhelmed by uncertainties in the non-perturbative vector meson distribution amplitudes, our determinations of these spin-conserving and spin-flip parameters provide non-perturbative inputs for modeling the S-wave central potentials, as well as the tensor forces and D-wave mixing effects, in exotic heavy tetraquarks.
Related
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BibTeX
@misc{wang2026couplings,
title = {{The $H^*H^*V$ couplings from light-cone sum rules}},
author = {Chao Wang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.02791},
eprint = {2609.02791},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.02791},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - The H^*H^*V couplings from light-cone sum rules
AU - Chao Wang
PY - 2026
DA - 2026/09/22
PB - arXiv
DO - 10.48550/arxiv.2609.02791
UR - https://arxiv.org/abs/2609.02791
AB - We present a determination of the strong charge couplings g_H^*H^*V and magnetic couplings f_H^*H^*V (with H ∈ {D, B} and V ∈ {ρ, ω, K^*, ϕ}) using the framework of light-cone sum rules (LCSR). The theoretical precision is improved by establishing the leading-power hard-collinear factorization formulas with next-to-leading-order (NLO) α_s corrections, alongside the inclusion of power-suppressed contributions up to the next-to-next-to-leading power (NNLP) for both channels. By parameterizing the 𝒪(1/m_H^*) power corrections, we extract the universal static couplings β= 0.73 ± 0.13 and λ̂ = 0.23 ± 0.06 GeV^−1, highlighting their distinct heavy-quark scaling behaviors. While our investigation into SU(3) flavor symmetry breaking shows that these effects are currently overwhelmed by uncertainties in the non-perturbative vector meson distribution amplitudes, our determinations of these spin-conserving and spin-flip parameters provide non-perturbative inputs for modeling the S-wave central potentials, as well as the tensor forces and D-wave mixing effects, in exotic heavy tetraquarks.
ER -