Author

Guanghua Xu

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Preprint Oct 2026

Relativistic corrections to heavy quarkonium $+\gamma$ production at super Z factory

In the framework of nonrelativistic quantum chromodynamics, we study the $\mathcal{O}(v^2)$ relativistic corrections to heavy-quarkonium production associated with a photon at future electron-positron colliders operated in the Z-factory mode. S-, P-, and D-wave heavy quarkonia as well as the mixed state $\psi(3770)$ ar...

Xiao-Peng Wang, Guang-Hua Xu, Yi-Jie Li et al. · 0 citations

Preprint Aug 2026

Resonance-continuum interference with a possible tensor $X(6900)$ in radiative double-charmonium production at $\sqrt{s}=10.58~{\rm GeV}$

We study radiative double-charmonium production, $e^+e^-\to HH\gamma$ with $H=J/\psi$ and $\eta_c$, at $\sqrt{s}=10.58~{\rm GeV}$, including a possible tensor contribution from the fully charmed state $X(6900)$. The nonresonant amplitudes are calculated within the color-singlet non-relativistic QCD framework, while the...

Meng Jia, Yi-Jie Li, Guang-Hua Xu et al. · 1 citation

Preprint Jul 2026

Revisiting relativistic corrections to inclusive $J/\psi$ production at B factories: Complete expansion for three-body quarkonium production

We revisit the calculations of relativistic corrections to inclusive $J/\psi$ production at B factories. For quark-level subprocesses with three-body final states, we carry out a full expansion of the final-state kinematic parameters. The resulting cross sections are theoretically self-consistent and independent of the...

Sheng-Juan Jiang, Sai Cui, Guanghua Xu et al. · 0 citations