Study of $e^{+}e^{-}\rightarrow h^{+}h^{-}J/\psi$ ($h=\pi,K,p$) via initial-state radiation at Belle II

Sumitted to PubDB: 2025-07-17

Category: Physics / performance paper

Tags: Run 1

Principal Authors Sen Jia, Yipu Liao, Chengping Shen, Changzheng Yuan
Date 2026-06-24
Working group Quarkonium
Belle II Number BELLE2-PUB-PH-2025-025
Abstract Using a data sample of $427.9~{\rm fb}^{-1}$ collected by the Belle~II detector at or near the $\Upsilon(4S)$ and $\Upsilon(10753)$ resonances, the cross sections for $e^+e^-\to h^+h^-J/\psi~(h=\pi/K/p)$ at center-of-mass energies ranging from 3.8 GeV or the production threshold to 5.5/6.0/7.0 GeV have been measured via initial-state radiation. The cross sections for the processes $e^+e^-\to\pi^+\pi^-J/\psi$ and $e^+e^-\to K^+ K^-J/\psi$ are consistent with previously published results. The cross sections for these channels obtained by combining with previous Belle results are also given. The process $e^+e^-\to p\bar{p}J/\psi$ is investigated for the first time. The yields are small and no significant structure is observed in the cross section versus energy. Searches for vector charmonium-like states in the $h^+h^-J/\psi$ systems, and for associated intermediate states in the $h^{\pm}J/\psi$ systems, are also presented.
ArXiv https://arxiv.org/abs/2602.13569
Inspire https://inspirehep.net/literature/3120612
DOI https://doi.org/10.1103/f8qf-b284
Reference Phys. Rev. D 113, 112010 (2026)
Bibtex 
@article{Belle-II:2026heb,
    author = "Abumusabh, M. and others",
    collaboration = "Belle-II",
    title = "{Study of $e^{+}e^{-}\to h^{+}h^{-}J/ψ~(h=π,~K,~p)$ via initial-state radiation at Belle{\textasciitilde}II}",
    eprint = "2602.13569",
    archivePrefix = "arXiv",
    primaryClass = "hep-ex",
    month = "2",
    year = "2026"
}
Journal Phys.Rev.D
Preprint Number 2026-002;KEK2025-42

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