Exclusive Charmonium Production at the Electron-ion collider in China

TL;DR

This paper explores the potential of the future Electron-ion collider in China to study exclusive $J/eta$ production, modeling cross-sections and kinematics, and assessing detector capabilities to probe near-threshold mechanisms and high momentum transfer physics.

Contribution

It introduces a detailed simulation framework for $J/\psi$ production at the Chinese Electron-ion collider, focusing on detector design and physics potential for near-threshold phenomena.

Findings

Projected statistical uncertainties enable probing near-threshold mechanisms.

Detector design enhances exploration of high four-momentum transfer regions.

The study discusses the significance of forward amplitudes in $J/\psi$ production.

Abstract

We investigate the exclusive $J/\psi$ 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 $J/\psi$ photoproduction. Projected statistical uncertainties on $J/\psi$ 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..