Exclusive charmonium production at the electron-ion collider in China

Xue Wang; Xu Cao; Aiqiang Guo; Li Gong; Xiao-Shen Kang; Yu-Tie Liang; Jia-Jun Wu; Ya-Ping Xie

doi:10.1140/epjc/s10052-024-13033-9

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 684
https://doi.org/10.1140/epjc/s10052-024-13033-9

Regular Article - Theoretical Physics

Exclusive charmonium production at the electron-ion collider in China

Xue Wang¹^,2, Xu Cao²^,3^b, Aiqiang Guo²^,3, Li Gong¹, Xiao-Shen Kang¹, Yu-Tie Liang²^,3, Jia-Jun Wu⁴^,5 and Ya-Ping Xie²^,3

¹ School of Physics, Liaoning University, 110036, Shenyang, China
² Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
³ University of Chinese Academy of Sciences, 100049, Beijing, China
⁴ School of Physical Sciences, University of Chinese Academy of Sciences (UCAS), 100049, Beijing, China
⁵ Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences, 516000, Huizhou, Guangdong, China

^b caoxu@impcas.ac.cn

Received: 26 March 2024
Accepted: 15 June 2024
Published online: 11 July 2024

Abstract

We investigate the exclusive $J / ψ$ $J/\psi$ production at the future Electron-ion collider in China by utilizing the eSTARlight event generator. We model the cross-section and kinematics by fitting to the world data of $J / ψ$ $J/\psi$ photoproduction. Projected statistical uncertainties on $J / ψ$ $J/\psi$ production are based on the design of a central detector, which consists of a tracker and vertex subsystem. The precision of the pseudo-data allows us to probe the near-threshold mechanism, e.g. the re-scattering effect. The significance of the forward amplitudes is discussed as well. The design and optimization of the detector enhance the potential for exploring the near-threshold region and the realm of high four-momentum transfer squared, which is of particular interest on several physics topics.

© The Author(s) 2024

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